Sanjay Dhakate

Ac SI|R · NPL

The present investigation reported metal-free hierarchical porous and robust Nitrogen (N), Sulphur (S) co-doped carbon (NS-CoP@C) electrode for supercapacitor application. The NS-CoP@C was synthesized by single-step carbonization and activation of thiourea co-doped aniline-pyrrole co-polymer (CoP). The thiourea acted as a doping as well as activati...

One of the by-products produced in the petroleum refinery industry is Petroleum coke or pet coke. To make its use in the development of high-cost value-added carbon products apart from electrodes in steel and aluminum extraction is one of the areas of research interest among the scientific community. The present investigation optimized processing p...

The present study reported the performance of free-standing carbon nanofibers decorated with copper-metal-organic frameworks (Cu-MOFs). A green electrospinning technique was utilized to obtain nanofiber sheets that were carbonized and activated to produce activated carbon nanofiber sheets (ACNFs). These ACNFs consist of inherent oxygen functionalit...

Hybrid flexible thermoelectric (TE) materials are widely being explored for wearable TEs, micro power generators, and self‐powered electronics. The commonly used methods for developing hybrid flexible TE materials are organic–inorganic composite which exhibits low TE performance and second is inorganic material deposition over organic substrate mak...

Almost a decade ago, transition metal-doped wide-bandgap metal oxides showed a significant contribution to device applications. In combination, they are a promising candidate for applications in electro-magneto-optic devices. In the present study, Fe2O3 (hematite ore) (0–5 wt.%)-doped titania (TiO2) was synthesized by high-temperature solid-state r...

Band engineering is a promising approach that proved successful in enhancing the thermoelectric performance of several families of thermoelectric materials. Here, we show how this mechanism can be induced in the p-type TiCoSbhalf-Heusler (HH) compound to effectively improve the Seebeck coefficient. Both the Pisarenko plot and electronic band struct...

Scavenging ethylene is a useful intervention during the transportation and storage of tropical climacteric fruits like sapota. Sapota (Manilkara achras Mill.) is a delicious tropical fruit with a very high respiration rate and poor shelf life. To prolong its post-harvest shelf life, the use of palladium chloride in electrospun nanomats was evaluate...

Rapid industrialization and urbanization have increased air pollution, which poses a serious threat to human life. In megacities, the number of patients suffering from cardiovascular and respiratory diseases have increased rapidly. Face mask can be used for protection from outdoor air pollution, but indoor air quality can only be maintained through...

The demand for low operating voltage, fast resistive switching, cost-effective material materials, and devices leads to wearable technology. Nanoparticles of titanium dioxide TiO2 and iron (Fe³⁺) and europium (Eu³⁺) as Fe: Eu (1:1, 2:1, and 1:2) TiO2 samples were prepared using solid-state reaction route. X-ray diffraction (XRD) patterns showed an...

Taking hardware complexity into consideration of traditional continuous precursor purging systems for synthesis of few wall carbon nanotubes (CNTs) is a big challenge. Therefore, a novel precursor purging system for aerosol formation is designed to achieve uniform diameter distribution of CNTs, with the aerosol flow rate controlled either by number...

There is a pressing need for reliable, reproducible and accurate measurements of graphene’s properties, through international standards, to facilitate industrial growth. However, trustworthy and verified standards require rigorous metrological studies, determining, quantifying and reducing the sources of measurement uncertainty. Towards this effort...

Control of anthracnose disease caused by Colletotrichum gloeosporioides by use of essential oils encapsulated in nanofibres made of polyvinyl alcohol has been attempted in this study. Essential oils from plants of subtropical origin, thyme oil and betel leaf oil were incorporated in electrospun mats at different levels. The Scanning Electron Micros...

Biowastes derived carbon based materials are recently gaining attention due to their extraordinary surface and conductive characteristics. Herein, neem leaves derived porous carbon (NAC) with a 3D framework and interconnected pores are synthesized which shows hierarchal pore size distribution along with good conductivity that makes it a suitable el...

The conversion of biowaste to AC for supercapacitor applications is recently gaining attention due to its extraordinary high specific surface area (SSA), hierarchical pore size distribution and very good conductivity. Therefore, in this work we have utilized waste office papers as a precursor to synthesize highly porous carbon to be used as an elec...

In this work, pencil peel is used to derive the mix phase activated carbon at different temperatures viz 700, 800, and 900 °C for hybrid supercapacitor applications. The derived carbon is showing the highest specific surface area for P-800 (Pencil [email protected] 800 °C) sample and exhibits the graphitic and amorphous phase whose fraction can be...

In this paper, pure and Fe2O3 (1–5 mol %) doped Cr2O3has been synthesized using a solid-state synthesis method. X-ray diffraction pattern of pure and Fe2O3: Cr2O3 has a similar crystallographic hexagonal phase with space group R-3c and lattice parameter, a = 5.002 Å; c = 13.620 Å and, a = 4.913 Å; c = 13.469 Å, respectively; average crystallite siz...

In the present investigation, renewable kraft lignin-based nanofibers were synthesized by facile electrospinning technique and further converted into carbon nanofibers (CNFs) by heat treatment at different temperatures (600, 800 and 1000 °C). These different heat treated carbon nanofiber mats were characterized using SEM, Raman, FTIR, BET and elect...

Several off-stoichiometric compositions Bi0.5Sb1.5Te3+x (x = 0, 0.01, 0.015, 0.02) with varying Te concentrations were synthesized via melting the elemental components of stoichiometric compositions in a furnace operating at temperature 800 °C to study the role of excess Te on enhancing the thermoelectric properties. The structural characterization...

Silicon-germanium (SiGe) alloys are prominent high-temperature thermoelectric (TE) materials used as a powering source for deep space applications. In this work, we employed rapid cooling rates for solidification by melt-spinning and rapid heating rates for bulk consolidation employing spark plasma sintering to synthesize high-performance p-type Si...

The ternary intermetallic TiCoSb based half-Heusler (HH) alloys are prominent material exhibiting good p-type thermoelectric (TE) performance. In this work, we studied the implication of V and Nb as n-type aliovalent dopants on Ti crystallographic site of semiconducting TiCoSb based HH alloys for attaining higher TE performance in n-type counterpar...

Polyacrylonitrile/NaYF 4 :Eu +3 nanophosphor composite nanofibers have been successfully prepared using the electrospinning technique. The electrospun nanofibers exhibited intense emission of gradient blue (X 2 ¼ 0.254, Y 2 ¼ 0.152 and X 3 ¼ 0.233, Y 3 ¼ 0.139) with different concentrations of nanophosphor under the excitation wavelength of 239 nm....

The practical applications of unfilled CoSb3-based Skutterudites for thermoelectric (TE) devices have been limited primarily owing to their bipolar conduction behaviour, which is detrimental for the TE performance. In the present studies, a peak TE figure-of-merit (ZT)max ~ 0.7 at 860 K has been realized with a pioneering (ZT)average ~ 0.34 in p-ty...

The time and energy efficient synthesis of high performance β-Zn4Sb3 is essential for its thermoelectric (TE) based commercialization. In the present work, a facile yet scalable single-step processing has been demonstrated by employing reactive sintering at optimal conditions, to obtain dense polycrystalline p-type β-Zn4Sb3 bulk TE materials with a...

The current study reports a single-step synthesis of thermoelectric material p-type chromium di-silicide (CrSi2), using reaction sintering of their elemental powders employing spark plasma assisted sintering at optimized processing parameters. This process of single-step synthesis takes only a few minutes in contrast to the conventional processes r...

Rapid, reactive in-situ spark plasma sintering was employed for the fabrication of n-type Mg2(Si,Sn) material via optimising the sintering temperature. This reaction sintering process resulted in an excellent thermoelectric and mechanical performance in the Mg2(Si,Sn) alloy, which is recognised as a good earth-abundant, non-toxic, and low-cost, int...

NaYF4: Eu+3 nanophosphor/polyvinyl alcohol (PVA) composite nanofibers have been successfully fabricated using the electrospinning technique. The electrospun polymeric nanofibers were characterized by scanning electron microscopy (SEM), high-resolution transmission microscopy (HRTEM), X-ray diffraction (XRD), photoluminescence (PL), and Raman spectr...

Less expensive and abundantly available Hf-free Half-Heusler (HH) alloys are promising candidates for mid-temperature thermoelectric (TE). In the present work, we combine experimental outcomes with theoretical estimates to understand, design, and synthesize Hf-free ZrNiSn1-xGex based HH alloys with enhanced TE performance. A state-of-art TE Figure-...

Filled-Skutterudites constitute an important class of efficient and stable thermoelectric materials for power generation, however, their commercialization has been hampered due to the usage of expensive rare-earths elements as “fillers” and the non-availability of the efficient and compatible p-type counterpart. In view of this, we report a state-o...

Carbon fiber reinforced plastics (CFRPs) are known for their tunable mechanical properties but not for having tunable electrical properties. In this work, a composite CFRP based on conductive polyaniline (CF/ PANI) was prepared, which demonstrates electrical conductivity that is controllable post-fabrication. A thermosetting matrix of PANI doped wi...

Porous conducting carbon fiber paper (PCCFP) is one of the vital component of the gas diffusion layer (GDL) in a fuel cell. This PCCFP serves as the most suitable substrate for the GDL due to its electrical conductivity, mechanical properties, and porosity. In this approach, carbon fiber composite papers were developed by incorporating different fr...

In the present investigation Tin oxide(SnO2)/Graphene, Zinc oxide tetrapods(ZnO-T)/Graphene and SnO2/ZnO-T/Graphene nanocomposites were synthesized using simple chemical route from a mixture of few layer graphene (FLG) derived from re-exfoliation of expanded graphite and SnO2 and ZnO-T nanostructures via sonication and centrifugation. The resultant...

Continuous carbon nanofibers are of great interest in research nowadays due to their outstanding properties. But synthesis of cost effective, stable and straight carbon nanofibers from low cost polymeric precursor is still a challenge. In this direction, in the present study efforts are made to prepare stable and straight carbon nanofibers from low...

In the process of developing non-metallic electro-catalyst for oxygen reduction reaction (ORR), simultaneous co-doping of N and F into Multiwalled carbon nanotubes (MWCNTs) are synthesized and their structural and electrochemical properties are investigated. Microscopic analysis confirms that N-F/MWCNTs undergo structural transformation to wrinkled...

Nine compounds of poly(aniline), poly(O-methylaniline) and poly(O-methoxyaniline), each doped with sulphate, chloride and perchlorate anions in the emeraldine salt form of conducting polymers have been synthesized by peroxodisulphate oxidation method. The polymers have been characterized by elemental, UV-visible and infrared spectral analysis. The...