Baorui Xia's research while affiliated with Lanzhou University and other places

Publications (39)

Article
Both ferrovalley and quantum anomalous valley Hall effect (QAVHE) are practically desirable and inherently fascinating for new-style device applications. However, works realizing the intrinsic ferrovalley and QAVHE in a single ferromagnetic system with a high Curie temperature are still lacking. We predict that monolayer FeClBr exhibits the ferrova...
Article
MnO is a well-known antiferromagnetic transition mental oxide with a wide band gap, the lack of intrinsic ferromagnetism limits its applications in spintronics. Hence, in order to expand the application field of MnO and especially explore the existence of ferromagnetism, we experimentally achieve the N-doped MnO anchored graphene. As is expected, t...
Article
Two dimensional rhenium dichalcogenides (ReX2, X=S, Se) are becoming a type of semiconducting materials with in-plane anisotropy, which is promising to be applied in electronic devices. While the absence of intrinsic magnetism severely hinders its applications in spintronics. Herein, to meet the increasing demands in two dimensional spintronic mate...
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Realization of intrinsic two-dimensional (2D) magnetic materials with high Curie temperature is one of the prevalent research directions in spintronics. Here 2D ferromagnet of Mn-N4 embedded graphene were reported, where the single Mn atoms dispersed structure is confirmed by extended X-ray absorption fine structure (EXAFS) and high-angle annular d...
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The interfacial synergy of Co 3 O 4 @LaCoO 3 provides fast charge transfer paths and kinetics in the oxide/solution interface, which exhibit exceptional bifunctional catalytic activity and robust stability for Zn–air batteries.
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In recent years, with the fast development of integrated circuit electronic devices and technologies, it has become urgent to improve the density of data storage and lower the energy losses of devices. Under these circumstances, two-dimensional (2D) materials, which have a smaller size and lower energy loss compared with bulk materials, are becomin...
Article
Ferromagnetism of two-dimensional (2D) carbon-based materials, such as g-C3N4 and graphene based materials, is technologically and fundamentally important for many applications in spintronics. Herein, nitrogen-vacant g-C3N4 (VN-CN) and nitrogen doped graphene (N-G) have been successfully obtained by a facile metal co-heating denitrification from th...
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Herein, a strategy of Cr cations solely anchored on two dimensional carbon nanosheets by Cr-N bond is developed. The atomically dispersed Cr cations and Cr-N3 coordination are demonstrated by extended X-ray absorption fine structure characterization. Furthermore, the Cr-N3 anchoredcarbon nanosheets exhibits ferromagnetism, wherein the magnetization...
Article
The spin state of antibonding orbital (eg) occupancy in LaCoO3 is recognized as a descriptor for its oxygen electrocatalysis. However, the Co(III) cation in typical LaCoO3 (LCO) favors low spin state, which is mediocre for absorbing oxygen-containing groups involved in oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), thus hinder...
Article
In recent years, ferromagnetism induced by natural defects of nonmagnetic semiconductors has been widely investigated and expected to be applied in spintronics. On this basis, we report the ferromagnetic behavior of copper (I) nitride (Cu 3 N) nanoparticles. A robust room temperature ferromagnetism is found in Cu 3 N nanoparticles with the saturate...
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Layered transition metal dichalcogenides (TMDs) are considered as promising materials for electronic, optoelectronic and spintronic devices due to their outstanding properties. Herein, based on rhenium disulfide (ReS2) nanosheets, we realized the intrinsic room temperature ferromagnetism with the adsorption of P adatoms (P-ReS2). Experiments indica...
Article
Ferromagnetism in graphene-based materials has attracted much attention because of their potential applications in future spintronic devices. Here, we propose a strategy to induce “single-atom ferromagnetism” in three-dimensional graphene by Cu anchoring, wherein the Cu atoms are isolated with Cu–N4 moieties, as demonstrated by extended x-ray absor...
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One approach to accelerate the stagnant kinetics of both the oxygen reduction and evolution reactions (ORR/OER) is to develop a rationally designed multiphase nanocomposite, where the functions arising from each of the constituent phases, their interfaces, and the overall structure are properly controlled. Herein, we successfully synthesized an oxy...
Article
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As one of the transition metal dichalcogenides (TMDs), ReS2 behaves several outstanding properties, while the intrinsically nonmagnetic feature limits its applications in spin-related devices. In this study, we selected Cr as the dopant to realize the robust room temperature ferromagnetism in Cr-doped ReS2 (Cr-ReS2) nanosheets. And the saturation m...
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With the assistance of innovative approaches driven by nanotechnology, engineering 2D materials into designed architectures or desired structures could tailor the electronic structure into an appropriate energy band structure, tuning the properties of the materials to be a predictable manner. Here we systematically studied the role that the structu...
Article
Oxygen evolution reaction (OER) is an essential process of water splitting, which closely relates to the new generation energy exploration. As an electrochemical catalyst for OER, NiO has been extensively investigated in the past years. Whereas due to the relatively poor conductivity, it is still challenging to achieve better electrocatalytic perfo...
Article
Two-dimensional transition-metal selenides, especially MoSe2-based materials, are considered to be excellent alternative catalysts for the hydrogen evolution reaction (HER), where doping engineering has proven to be an effective way to tune their electrocatalytic activity. Hence, our first principle calculations predict that most of the transition...
Article
The poor electronic conductivity and inert basal plane restrict the further enhancement of hydrogen evolution reaction (HER) in 2H-phase MoSe2. Herein, we synthesized MoSe2 nanosheet arrays on carbon cloth and induced multi-vacancies in their basal plane via high energy Ar2+ beam irradiation, which are confirmed by the Raman, ESR, XPS and HRTEM ana...
Article
In this paper, Re-doped MoS2 nanosheets were synthesized by a facile hydrothermal reaction and an annealing process. Through structural characterization, it was observed that the doping of Re could lead to 2H-1T transformation in both the Re and Mo coordinating structures, and the 1T ratios of Mo and Re atoms increased with the Re-doping concentrat...
Article
Although transition metal dichalcogenide MoSe2is recognized as one of the low-cost and efficient electrocatalysts for the hydrogen evolution reaction (HER), its thermodynamically stable basal plane and semiconducting property still hamper the electrocatalytic activity. Here, it is demonstrated that the basal plane and edges of 2H-MoSe2toward HER ca...
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Resistive memory technology is very promising in the field of semiconductor memory devices. According to Liu et al, MoS2-PVP nanocomposite can be used as an active layer material for resistive memory devices due to its bipolar resistive switching behavior. Recent studies have also indicated that the doping of N element can reduce the band gap of Mo...
Article
We demonstrate by both calculation and experiments the effective B doping-induced activation of both the basal plane and Se-edge in vertically aligned MoSe2 flakes, and the disruptive enhancement in electrocatalytic hydrogen evolution reactions. The B doping boosts drastically the catalytic activity of MoSe2 for hydrogen evolution reaction compared...
Article
Realizing spin and electronic behavior of two-dimensional ultrathin nanosheets is significant to construct next generation nanoelectronics. Here, atomic-thick Ni3N nanosheets with clear room temperature ferromagnetism and high saturation magnetization (1.2 emu/g) are reported. X-ray magnetic circular dichroism and first-principles calculation resul...
Article
Synthesizing and designing of the hydrogen evolution reaction (HER) electrode composed of earth-abundance elements is the current research topics. Among the many discovered catalysts, cobalt disulfide has outstanding performance for HER due to its catalytic activity cobalt sites. Here, phosphorus-doped cobalt disulfide (P doped CoS2) samples are su...
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Robust ferromagnetism of two-dimensional (2D) semiconductors has been achieved in recent years. In this study, 2D MoS2 nanosheets doped with Fe ions were prepared and characterized. The results indicated that the prepared samples had no other impurities induced by Fe doping. M–H curves measured under different temperatures suggested that robust fer...
Article
Cobalt pyrite (CoS2) is considered to be a promising catalyst for hydrogen evolution reaction (HER) owing to its intrinsic metallicity and high catalytic activity. However, the catalytic inert S-sites and sluggish reaction kinetics severely impede its commercial application. Herein, combining with systematic theoretical and experimental approaches,...
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Manipulating electronic and magnetic properties of two-dimensional transitional-metal dichalcogenides has raised a lot of attention recently. Herein we report the synthesis and ferromagnetic properties of phase-transfer induced room temperature ferromagnetic behavior in 1 T@2H-MoSe2 nanosheets. Experimental results indicate the saturated magnetizat...
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The synthesis of 2D metal chalcogenide based on ferromagnetic nanosheets is in high demand for modern electronics and spintronics applications. Herein, Cu-doped MoS2 nanosheets were successfully prepared by a hydrothermal method. Magnetic measurement results indicate that the doping of Cu ions can introduce ferromagnetism into MoS2 nanosheets, wher...
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We have deposited a copper oxide (CuO) thin film using a magnetron sputtering system by modulating rate of oxygen flow, and we found that the phase of cuprous oxide (Cu2O) appeared after irradiation by argon ions. Magnetic measurement results indicate that the thin film exhibits room temperature ferromagnetism after irradiation, while the virgin Cu...
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Here, we propose a metal 1T-phase incorporation strategy to dramatically enhance the hydrogen evolution reaction (HER) catalysis in primitive 2H-MoS2 nanosheets. Electrochemical measurement results indicate the fabricated 1T@2H-MoS2/C nanosheets exhibit facile electrode kinetics, low-loss electrical transport and possess a proliferated density of c...
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Outstanding magnetic properties are highly desired for two-dimensional ultrathin semiconductor nanosheets for their potential applications in nano-electronics and spintronics. Here, ultrathin MoSe2 nanoflakes with plenty of edges were prepared via an efficient chemical vapor deposition method. The magnetic measurement results indicate that the samp...
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Layered transition metal dichalcogenides (TMDs) are now playing important roles in both fundamental studies and technological applications due to their special structures and rich physical properties. Here, hierarchical ultrathin TMD nanosheets based on molybdenum sulphoselenides [Mo(SxSe1-x)2] with tunable ferromagnetism were synthesized by a one...
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Two-dimensional ferromagnetic ultrathin nanosheets hold great promise for next generation electronics and spintronics. Here, intrinsic ferromagnetism was achieved through a new effective strategy by fluorine adsorption on MoS2 nanosheets, where the fluorinated MoS2 nanosheets exhibit stable ferromagnetic hysteresis at room temperature with saturati...
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We report the new functionality of room temperature ferromagnetism in CuO-ZnO heterostructures. Magnetic measurement results indicate the CuO-ZnO heterostructures show enhanced ferromagnetism contrary to the pure CuO (ZnO) and the observed ferromagnetism is proportional to the interface counts for the film-heterostructures, providing proof of inter...

Citations

... Several approaches have been developed to synthesize bulk forms and nanocrystals of Cr 2 X 3 , of which self-flux, solvothermal, chemical spray pyrolysis, molecular precursor, and Chemical Vapour Transport (CVT) methods are the most commonly used. [38,78,[84][85][86][87][88][89][90][91][92] However, there have not been definite synthesis reports using these methods where atomically thin flakes . Bulk single crystal, nanocrystalline (nanorods and nanoplates), and thin film images of Cr 2 X 3 . ...
... The hallmark of antiferromagnetic substances (e.g., iron manganese and chromium) is their zero net magnetic moments, while ferrimagnetics (such as Fe 3 O 4 or magnetite) have net magnetic moments of small value. This is because ferrimagnetics have mostly parallel and some antiparallel spins, whereas the number of parallel and antiparallel spins in antiferromagnetic cancel each other out (Blügel et al., 1988;Zhang et al., 2023). The magnetic properties exhibited by different NPs play a critical role in their applications within the biomedical field. ...
... In recent decade, decorated graphene has attracted a lot of attention from scientists [49][50][51]. For instance, Zhang et al reveal that the magnetic moments of Mn-N-4 embedded graphene come from the Mn atoms by measuring the x-ray magnetic circular dichroism [52]. Additionally, we have successfully investigated magnetic behaviors of nano-graphene bilayer structure [53]. ...
... In recent years, defect engineering [9], interface engineering [10,11] and other strategies have been used to optimize the catalytic activity of transition metal-based catalysts. Among them, biphasic engineering has been widely studied because the heterogeneous interface it forms can effectively increase the active sites of catalysts, and it can also affect catalytic ability by changing surface characteristics and electronic states [12]. It is a challenging task to make two different types of active components rationally combine and have interface effects at the nanoscale. ...
... Based on the effect of oxygen vacancies and the electronic structure of B-site transition metals on electrocatalytic activity, several strategies for doping other elements in the A/B site of LaCoO 3 perovskite have been proposed. Qian et al. [23,24] have successively investigated the effect of A-site doping with Ce and Ca on the bifunctional catalytic activity of LaCoO 3 perovskite. They found that partial substitution of Ce or Ca can optimize the electron-spin state of Co, thereby improving the covalency and conductivity of Co 3d-O 2p and thus achieving highly enhanced performance of ORR/OER. ...
... In 2D systems, taking into account magnetic anisotropy is essent long-range spin ordering [38,39]. Based on DFT calculations incorporat coupling [36], it has been proven that the easy magnetization axis for V [0,0,1] direction, parallel to the ( )-axis (Figure 2a,b). ...
... It has been reported that a higher concentration of nitrogen vacancies improves the separation of photogenerated charge carriers and light absorption [119,120]. Furthermore, N 3C has a larger number of unpaired electrons in the nitrogen atoms, resulting in a higher density of active sites available for photocatalytic processes [121]. Wang et al. [104] demonstrated that surface nitrogen vacancies reduce the recombination of photoinduced charge carriers by creating localized electronic trap states within the band gap of the material. ...
... 3d-transition-metal-adorned C3N can be used in nanoscale spintronic devices because of its wide half-metallic energy window and suitable band gap. Xia B. et al. established a method for introducing magnetism into carbon nanosheets using a single Cr cation that is only attached to twodimensional carbon nanosheets via Cr-N bonds [71]. The highest magnetization (Cr: 2.0%, 0.86 emu g −1 ) under 3 T was achieved at 50 K, where the magnetization changes with the Cr concentration. ...
... However, σ is lower for CdS type-d, type-e, and type-f because of their electron concentrations are lower under dark conditions. It is found that lower σ values are due to nano-size particles [72,73]. Because of lower σ, CdS type-d, type-e, and type-f are bad conductors. ...
... The reverse magnetization values of LCO and LCO-3 were obtained through the FC curve (Fig. 5h). According to Curie Weiss's law, the magnetic moment of LCO-3 (0.8 μ B ) was obtained from the fitting results compared to LCO (0.1 μ B ) [21,49]. The significant increase of the magnetic moment indicated that V La could increase the spin state of Co 3+ near the V La site to a change in the e g orbital occupancy of Co 3+ , which was one of the important factors affecting the degradation mechanism during PMS activation [50]. ...