Liangsen Liu's research while affiliated with Tianjin University and other places

Publications (79)

Article
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Fiber-reinforced polymer (FRP) composites are widely used to reinforce and repair buildings due to their high strength, corrosion resistance, lightweight, and convenient of construction. The interfacial properties between FRP and the reinforced buildings play a very important role in the effective transfer of stress and largely determine the servic...
Article
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Sterols constitute vital structural and regulatory components of eukaryotic cells. In the oleaginous microorganism Schizochytrium sp. S31, the sterol biosynthetic pathway primarily produces cholesterol, stigmasterol, lanosterol, and cycloartenol. However, the sterol biosynthesis pathway and its functional roles in Schizochytrium remain unidentified...
Article
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A composite material with improved characteristics can be produced by combining metal‐organic frameworks (MOFs) with polymer fibers. In contrast to commonly used powdered MOFs, polymer fibers can offer flexible support for MOFs, and some of the fibers can even work in concert with MOFs. The molecular transport channels are significantly enlarged wh...
Article
Metal nanoclusters (MNCs) are important in electrocatalysis, characterized by high atom utilization, unique geometrical and electronic structures, and abundant active sites. Unfortunately, nanoscale MNCs tend to aggregate, affecting their catalytic...
Article
Owing to the intrinsic flame-retardancy, thermal stability, sound absorption, and easy processing, melamine-formaldehyde foams(MFs) have drawn substantial attention. Typically, the high-porosity and compressibility of flexible MFs render them suitable for the construction of 3D templates and in the fabrication of porous N-doped carbon materials. Bu...
Article
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Docosahexaenoic acid (DHA, 22:6n-3) plays significant roles in enhancing human health and preventing human diseases. The heterotrophic marine dinoflagellate Crypthecodinium cohnii is a good candidate to produce high-quality DHA. To overcome the inhibition caused by the fermentation supernatant in the late fermentation stage of DHA-producing C. cohn...
Article
Carbon fiber-reinforced composites with superior strength-to-weight and stiffness-to-weight ratio were highly resistant to ionizing radiation, which make them popular in nuclear reactor. There were large doses of γ-radiation in nuclear reactor, which caused damage in composites. In order to investigate effect of high γ-ray absorbed dose on carbon f...
Article
Graphene oxide (GO) membranes with doorman characteristic, tunable nanochannels microenvironment and high interfacial adhesion were fabricated. Herein, polyethyleneimine (PEI) molecules were selected for bridging, reducing and intercalating GO nanosheets in...
Article
Undulating structure and internal graphite lattice distorted structure were induced via high-penetrating gamma irradiation. A stress-inducing strategy is supplied to obtain electrode materials. Advanced characterization was used to assess the structural evolution.
Article
In recent years, polyurethane/graphene composites (PUGs) have attracted considerable attention attribute to their wide applications ranging from industrial manufacturing to bioengineering. The addition of graphene-based derivatives to the PU matrix can improve the mechanical, thermal, and electromagnetic properties, etc., to meet the specific deman...
Article
Molybdenum disulfide (MoS2) has possession of a layered structure and high theoretical capacity, which is a candidate anode material for sodium ion batteries. However, unmodified MoS2 are inflicted with a poor cycling stability and an inferior rate capability upon charge/discharge processes. Considering that the shape and size of anode materials pl...
Article
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Electrocatalytic performance of low-cost graphitic carbon nitride (CN) is greatly limited by its limited conductivity and small specific surface area. Herein, a simple and cost-effective idea to produce novel nanocomposite is constructed by the CN and cetyl trimethyl ammonium bromide functionalized carbon black (CB) anchored platinum nanoparticles...
Article
Reasonable design of defect engineering in the electrode materials for sodium-ion batteries (SIBs) can significantly optimize battery performance. Here, compared with the traditional “foreign-doping” defects method, we report an innovative gamma-irradiation technique to introduce the “self-doping” defects in the popcorn hard carbon (HC). Considerin...
Article
The development of efficient and durable electrocatalysts is essential for the practical application of fuel cells. Metal-support interaction (MSI) is an important concept in heterogeneous catalysis, which can construct the structure of catalyst and improve the reaction activity and stability of catalyst. Based on this, a simple and efficient metho...
Article
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Background: Docosahexaenoic acid (DHA) is essential for human diet. However, high production cost of DHA using C. cohnii makes it currently less competitive commercially, which is mainly caused by low DHA productivity. In recent years, repeated fed-batch strategies have been evaluated for increasing the production of many fermentation products. Th...
Article
In this report, polygonal angle platinum nanoparticles (PtNPs) anchored on nitrogen doping reduced graphene oxide (NrGO) as oxygen reduction reaction (ORR) catalyst was synthesized by gamma irradiation assisted with in situ hydrolysis of urea without using any shape inducer, seed, or template. Urea was not only employed as the nitrogen source, but...
Article
The interface between carbon fibers and resin has a great effect on the mechanical properties of composites, and acts as a bridge for the transportation of load between fibers and resin. The traditional measurement method for interfacial shear strength (IFSS) relies mainly on single‐fiber fragmentation test, which is not suited for opaque composite...
Article
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The electromagnetic shielding materials with characteristics of ultrathin, lightweight and high strength are the most advantageous materials in electromagnetic shielding. In this work, novel carbon fiber nonwoven composites with interlayer microstructure were designed and prepared. Due to their special structure, carbon fiber nonwoven composites co...
Article
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With the capability of inducing small particle size of supported metal in graphite oxide (GO), γ-ray irradiation method applied in preparing graphite oxide-gold (GO-Au) nanocomposites as electrochemical immunosensor has attracted specific attention recently. To study the accurate factors influencing the precise morphology and final performance of t...
Article
With the remarkable increment speed of consumer electronics, shielding materials qualified for favourable minimal thickness, mechanical behaviors and efficient conduction path are imperiously demanded. To manufacture desired shielding materials qualified for favourable mechanical behaviors and efficient conduction path, we designed a foam-like nonw...
Article
Three representative noble metal (Ag, Au and Pt) nanoparticles decorated graphene oxide (NMNPs/GO) composites were fabricated via γ-irradiation without scavenger. The NMNPs/GO composites exhibited the pure and well-dispersed particles structure, which directly illustrated that the GO could be acted as scavenger to benefit reduction and growth of NM...
Article
In order to investigate the effect of the addition of carbon nanotubes (CNTs) in carbon fibers reinforced epoxy matrix composites (CF/EP) on the ability of composites to resist γ radiation. We used γ irradiation and investigated composites, γ-CF/EP without CNTs; γ-CF/EP with CNTs in matrix (γ-CF/EP-CNTs); γ-CF/EP with CNTs in interface (γ-CF-CNTs/E...
Article
The platinum-gold (PtAu)/reduced graphene oxide (rGO) nanocomposites were obtained via the gamma irradiation assisted by microemulsion while PtAu NPs showed the monodispersed flower-like shape with small-sized (below 15 nm). Gamma irradiation controlled the reduction of graphene oxide and PtAu NPs meanwhile the microemulsion endowed PtAu NPs with p...
Article
In developing high-performance electrode materials for ion batteries, manifold methods to assemble definite structures of graphene-SnOx composite anodes are presented. Here we have firstly put forward an efficient strategy based on fortissimo penetration from γ-ray irradiation to assemble graphene and Sn/SnO2 composite, which is formed by a large-s...
Article
In this article, the surface‐layer structure evolution of carbon fibers along the cross‐section γ‐irradiated in epoxy chloropropane has been estimated by X‐ray photoelectron spectroscopy combined with in situ argon‐ion sputtering that is different from argon‐ion cleaning. In argon‐ion (Ar‐ion) sputtering, the detection and sputtering were alternate...
Article
In this study, carbon-coated SnO2 nanoparticles were loaded on pure carbon nanofibers ((SnO2@C)/CNFs) by the synchronized electrospinning-electrospraying method and subsequent heat treatment. Compared with SnO2@CNFs composites fabricated by conventional electrospinning method, carbon-coated SnO2 nanoparticles were homogeneously dispersed while atta...
Article
Dietary omega-3 long-chain polyunsaturated fatty acids docosahexaenoic acid (DHA, C22:6) can be synthesized in microalgae Crypthecodinium cohnii; however, its productivity is still low. Here, we established a new protocol termed as "chemical modulator based adaptive laboratory evolution" (CM-ALE) to enhance lipid and DHA productivity in C. cohnii....
Article
We designed a graphene oxide (GO) supported silver nanoparticles (AgNPs) nanocomposite via polyvinyl-pyrrolidone (PVP) and isopropanol (IPA) assisted gamma irradiation, in which GO contained abundant functional groups and AgNPs were endowed with monodispersed spherical shape. The graphite oxide was intercalated by the imidazole silver nitrate as th...
Article
Recently, a novel 3D nanostructured materials that consists of different types of carbon materials via covalent C–C bond has greatly enhance the performance due to synergistic combination of different carbon forms. In this work, carbon spheres are seamlessly grown on the 3D CNT hybrid architectures loading nickel that serves as template and a CNT–n...
Article
It is well known that high-nitrogen content inhibits cell growth and docosahexaenoic acid (DHA) biosynthesis in heterotrophic microalgae Crypthecodinium cohnii. In this study, two nitrogen feeding strategies, pulse-feeding and continuous-feeding, were evaluated to alleviate high-nitrogen inhibition effects on C. cohnii. The results showed that cont...
Article
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The heterotrophic microalga Crypthecodinium cohnii has attracted considerable attention due to its capability of accumulating lipids with a high fraction of docosahexaenoic acid (DHA). In our previous study, ethanolamine (ETA) was identified as an effective chemical modulator for lipid accumulation in C. cohnii. In this study, to gain a better unde...
Article
Lightweight and easy-processable epoxy composites with high conductivities and mechanical properties were developed by the oxidative polymerization of polyaniline (PANI) coated on porous and freestanding three-dimensional graphene foams (3DGFs). Heat treatment of 3DGFs was prepared, leading to the less defective structure and an increase of conduct...
Article
Oxygen supply is an important factor during Crypthecodinium cohnii fermentation for docosahexaenoic acid (DHA) production. However, few studies about the intrinsic correlation between dissolved oxygen (DO) and cellular metabolism have been reported. In this study, the responses of C. cohnii to different DO levels were evaluated. The results showed...
Article
In this article, we utilized a facile approach for growth of carbon nanotubes onto the surface of carbon fibers by microwave plasma‐enhanced chemical vapor deposition to improve the interfacial properties of composites. By adjusting the deposition time, the length and density of carbon nanotubes could be controlled, and the results of Brunauer–Emme...
Article
Schizochytrium sp. is a promising candidate for docosahexaenoic acid (DHA) production due to its high content of lipid and DHA proportions. To further enhance the lipid accumulation, seven chemical modulators were screened to evaluate their roles on lipid accumulation. Notably, among the seven tested chemical modulators, the addition of naphthoxyac...
Article
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To explore the mechanism of microvoid evolution and the pertinence of microvoid and mechanical behavior of carbon fibers (CFs) in γ-irradiation, T700 CFs were exposed to γ-rays under epoxy chloropropane (ECP) and argon (Ar) at room temperature. The results from small angle X-ray scattering (SAXS) showed that the average microvoid radius of the CFs...
Article
The relationship between microstructures, surface activities and mechanical properties of γ-irradiated carbon fibers had been evaluated quantitatively. X-ray photoelectron spectroscopy combined with argon ion sputtering indicated that outer-surface part (~10nm) was functionalized and disordered by grafting reaction, which led to the increase of sur...
Article
We have studied the structural change of defective graphene built by annealing in different temperature under the condition of gamma irradiation. Firstly, we found the heat treatment not only reduced but also striped the graphene. This behavior made defects become more firstly and then become less with the increase of temperature. And then gamma ir...
Article
To enhance photocatalysis and recycling abilities of catalyst simultaneously, novel microstructure in which TiO2 nanoparticles were semi-wrapped in carbon nanofibers (CNFs) was proposed and produced successfully. Betaine was employed as a foaming agent to drive the TiO2 nanoparticles to migrate from inner space to the surface of CNFs gradually unde...
Article
Full-text available
The heterotrophic microalga Crypthecodinium cohnii is well known for its lipid accumulation, with a high proportion of docosahexaenoic acid (DHA). In this study, we report a novel screening approach to obtain mutants of C. cohnii with high growth and lipid content using the acetyl-CoA carboxylase (ACCase) inhibitor sethoxydim. C. cohnii mutants wer...
Article
The heterotrophic microalga Crypthecodinium cohnii accumulates lipids with a high fraction of docosahexaenoic acid (DHA). However, lack of genomic information limits the understanding of its physiological metabolism for better DHA production. In this study, de novo assembly of the C. cohnii transcriptome from three growth stages (i.e., fast growth,...
Article
Adaptive laboratory evolution (ALE) was commonly used for strain improvement. Crypthecodinium cohnii is known to accumulate lipids with a high fraction of docosahexaenoic acid (DHA). In order to improve DHA production under high substrate concentration, a glucose-tolerant C. cohnii strain was firstly obtained by ALE after 260 cycles for 650 days wi...
Article
This paper reported a method to fabricate graphene oxide sheets supported Ag nanoparticles (AgNPs/GOS) with single crystalline structure and parabolic distribution without surfactant or functional agent. We used imidazole silver nitrate as intercalation precursor into the layers of graphite oxide, and subsequently reduction and growth of intercellu...
Article
Recently, carbon nanofibers@TiO2 (CNFs@TiO2) composites as photocatalysts for dye degradation have attracted intense attention. However, only few contributions had been made to investigate systematically the differences between the various preparation approaches and the influence of thermal treatment on the photocatalytic activity. In this work, th...
Article
The surface activity and mechanical properties of carbon fibers (CFs) were improved simultaneously by magical γ-irradiation. However, microstructure evolution rules of γ-irradiated CFs were still ambiguous. As a representative, T1000 CFs were irradiated by γ-rays and then observed by X-ray diffraction, X-ray photoelectron spectroscopy and Raman spe...
Article
Based on the representative volume element (RVE) model of single layer in multilayer-connected biaxial weft-knitted (MBWK) fabric-reinforced composites, the elastic properties of multilayer-connected biaxial weft-knitted fabric-reinforced composites have been developed and presented hereafter. The average stiffness matrix of the multilayer-connecte...
Article
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To investigate the effects of surface functionalization of exfoliated graphene (EG) on the crystalline form of β-phase and dielectric properties of poly(vinylidene fluoride) (PVDF), we prepared PVDF-based composites reinforced by different functionalized EG. The X-ray photoelectron spectroscopy results indicated that a wide variety of chemical func...
Article
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Grafting fluorine onto graphene oxide (GO) by CF4 plasma treatment was investigated in this study. An easy, low-cost, and effective synthesis of the high-dispersive fluorinated GO (FGO) with tunable atomic ratio of F/O (R F/O) has been realized and the R F/O can be readily manipulated just by adjusting the reaction time. The influence of plasma tre...
Article
Polyacrylamide grafted graphene (PAM-g-graphene) from graphite oxide (GO) was successfully prepared by γ-ray irradiation with acrylamide monomers in aqueous at room temperature in this paper. Our strategy involves the PAM chains graft on the surface and between the layers of GO by in situ radical polymerization which led to the exfoliation of GO in...
Article
The interfacial properties of epoxy nanocomposites reinforced by thermally exfoliated graphene nanosheets (TEG) and activated thermally exfoliated graphene nanosheets (a-TEG) were compared. The specific surface area (SSA) of a-TEG with well-defined micro-mesopore size distribution was 1000 m2/g, which was much higher that of TEG (550 m2/g). The int...
Article
This article presents an experimental study of bending properties of multilayer-connected biaxial weft knitted (MBWK) fabrics-reinforced composites made with carbon fibers. Three types of composites are used in bending test, which are three-layer-connected biaxial weft knitted fabric-reinforced composite, four-layer-connected biaxial weft knitted f...
Article
Multilayered-connected biaxial weft knitted (MBWK) fabric reinforced composites have excellent tensile properties. Three kinds of different fabrics reinforced composites are used in this paper, which are three-layer-connected biaxial weft knitted fabric, four-layer-connected biaxial weft knitted fabric and five-layer-connected biaxial weft knitted...
Article
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The alterations of GO nanostructures after [gamma]-ray irradiation in water, air and styrene with an absorbed dose of 200 kGy are systematically investigated. The interlayer structures of the ultimate products are confirmed to be remarkably different from each other due to the distinct changes of functional groups on single-sheets in various media....
Article
Polyvinylidene fluoride (PVDF)/graphite oxide (GO) and PVDF/multi-walled carbon nanotubes (MWCNTs) ultrafiltration membranes were prepared by solution-blending the ternary mixture of PVDF/carbon materials/dimethylacetamide in combination of the phase inversion method. It was indicated that the blend membranes exhibit better pore structure and highe...
Article
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A facile method of successive intercalation, grafting and exfoliation of graphite oxide in monomers by γ-ray irradiation to obtain functionalized graphene nanosheets was reported. The monolayer percentage of functionalized graphene nanosheets was sharply increased and the agglomeration showed a significant decrease.
Article
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Ion irradiation with energetic particles can successfully be used for changing the properties of carbon nanotubes (CNTs) by functionalising, connecting, and creating defect structures in the CNTs. In this paper, we focus on the recent progress in our understanding of ion-irradiation-induced phenomena in CNTs. The production of defects (vacancies an...
Article
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Structural changes caused by an electron beam with the high irradiation energy of 5 MeV were investigated in few-layered graphene. Both the original and the irradiated few-layered graphene were characterized by x-ray diffraction, Raman spectroscopy, and x-ray photoelectron spectroscopy. It was found that a typical diffraction peak of graphene oxide...
Article
Structural changes caused by an electron beam with an absorbed dose of 500kGy were investigated in graphene oxide (GO). In this paper, GO and irradiated GO were characterized by X-ray diffraction, Raman spectroscopy and X-ray photoelectron spectroscopy, respectively. It was found that the interlayer spacing of GO was decreased because of the altera...
Article
Full-text available
The surface functionality and interlayer spacing changes induced by γ-ray irradiation were investigated in multi-walled carbon nanotubes (MWCNTs). The modification effect of MWCNTs irradiated in air and epoxy chloropropane (ECP) was characterized by x-ray photoelectron spectroscopy, Raman spectroscopy, and x-ray diffraction. The results indicated t...
Article
Multi-walled carbon nanotubes (MWCNTs) were irradiated by γ-rays in air and epoxy chloropropane (ECP) with an absorbed dose 200 kGy. We found that MWCNTs showed an opposite behavior in structural change when irradiated in the two different media. Gamma-ray irradiation decreased the inter-wall distance of MWCNTs and improved their graphitic order in...
Conference Paper
Full-text available
Ultra-high molecular weight polyethylene fiber plain woven fabric reinforced line-low-density polyethylene composites with different matrix volume fraction were prepared. The interfacial bonding strength and the impact property of the laminates were investigated. The experiment results revealed that the sample with a matrix volume fraction 14% show...
Article
Full-text available
The gamma-ray pre-irradiation induced method was employed to study the effect of chloroepoxypropane modification on the surface of carbon fibre (CF) and the interfacial properties of CF/epoxy. Systematic experimental work was conducted to determine the fibre surface topography, fibre surface energy, fibre tensile strength and interfacial adhesion o...
Article
To investigate the effect of γ-ray radiation on the microstructure of carbon fibers (CF) and graphite, the carbon fibers and graphite were irradiated by 60Co source at room temperature. X-ray diffraction results indicate that the interlayer spacing d002 of CF and graphite decreased after irradiation. The intensity of (002) peak in CF decreased whil...

Citations

... 1D based-nanoheterostructures have also impacted the electrocatalytic field in recent years. For example, the primary advantages of 1D nanowire-based heterostructures have been highlighted in recent reviews, 61,62 showcasing their potential as cost-effective, durable, and high-energy alternatives to traditional electrocatalysts. The properties of 1D materials can be extensively tailored through the methods employed in their synthesis. ...
... The epoxy polymers may develop pores and cracks during the curing process, potentially reducing corrosion resistance when applied to a metallic substrate (Liu et al., 2023). Reinforcement of SiO 2 or similar additives in epoxy polymers will seal the pores and hinder the penetration of corrosives onto the coated surface (Verma et al., 2020). ...
... Of particular interest have been the formaldehyde gels or foams [71,72]. Formaldehyde (HCHO) is a small molecule containing carbon, hydrogen, and oxygen, and it can readily undergo polymerization reactions to form more complex carbon-based structures. ...
... Many researches have shown that the X-ray shielding efficiency is significantly influenced by the dispersity of high-Z elements in the composite matrix and the hierarchical structure of substrate could contribute to the dispersion of functional components [13][14][15][16]. Quan et al. prepared polymer-matrix composites containing Bi nanoparticles and UHMWPE for personal radiation shielding, but Bi nanoparticles dispersed unevenly in UHMWPE without hierarchical structure, resulting in the difference of shielding performance [17]. ...
... Moreover, some DHA-producing microalgae can thrive in heterotrophic environments, further enhancing their potential as a sustainable source of DHA. Notably, the heterotrophic marine microalga C. cohnii has demonstrated significant promise as a valuable vegetarian source of DHA due to its higher DHA production capabilities (Liu et al. 2022). ...
... PU has notable characteristics, including exceptional mechanical strength, effective abrasion resistance, toughness, and flexibility at low temperatures. The advanced technology applied in the coating process of synthetic leather, utilizing PU/graphene composites, possesses remarkable features [42]. Within various applications, PU stands out as an important retanning agent and coating material in leather manufacturing [43]. ...
... The rapid development of electrochemical energy storage has garnered significant interest due to its cost-effectiveness and superior efficiency of large-scale production it offers [1][2][3][4][5]. In recent years, sodium-ion batteries (SIBs), have become prospective alternatives to lithium-ion batteries, drawing increasing attention as the next generation of rechargeable battery systems owing to their resource abundance and similar storage mechanisms [6][7][8][9]. However, stationary SIBs operating in the field need to adapt to being warmed and cooled by the surroundings, which will cause unstable charge/discharge cycles and rapid capacity decay [10][11][12][13][14]. ...
... The following supporting information can be downloaded at: https://www.mdpi.com/article/10.3390/catal13020406/s1, Figure S1: TEM image of Pt3Co nanoparticles and Pt/C catalyst; Figure S2: Pt 4f XPS spectra pattern of Pt/C and the comparison of Pt3Co and Pt/C; Figure S3: CV and LSV curves of Pt3Co nanoparticles and Pt/C before and after 5000 cycles ADT; Figure S4: TEM image of Pt/C, Pt3Co nanoparticles and Pt3Co superlattice before and after ADT; Figure S5: theoretical model of Pt (111) and Pt3Co (111); Figure S6: Tafel plot of Pt/C, Pt3Co nanoparticles, and Pt3Co superlattice catalyst; Figure S7: EDS mapping of Pt3Co superlattice catalyst; Table S1: detail electrochemical data of all the catalyst in this paper; Table S2: Performance of catalyst in this work and several representative results with high performance from recent published work [4,6,[49][50][51][52][53][54][55][56][57][58]. ...
... A few literatures briefly mentioned purification methods. Most of them only performed simple centrifugation separation on the nanocomposites [62,63,66,76,83,[95][96][97][98][99][100][101][102][103][104][105][106][107][108][109][110][111]. Through comparison, it was found that the supernatant of CDs was collected as the product during the preparation of CDs, while the precipitate of the nanocomposites was centrifuged as the product during the preparation of nanocomposites. ...
... It allows for sample classification and the description of features that are driving the classification by adding dimension of data visualization (Babicki et al., 2016). It has been well used for exploring metabolic flux of microalgae previously Lv et al., 2020). In this study, heatmaps of targeted metabolite analysis in all samples were generated for better interpreting the qualitative information of these metabolites. ...