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420 results on '"Batabyal, Sudip K."'

151. A ZnO nanowire resistive switch

Author

Karthik, K. R. G., primary, Ramanujam Prabhakar, Rajiv, additional, Hai, L., additional, Batabyal, Sudip K., additional, Huang, Y. Z., additional, and Mhaisalkar, S. G., additional

Published
2013
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152. Synthesis, Characterization, and Photocatalytic Properties of In2S3, ZnIn2S4, and CdIn2S4 Nanocrystals.

Author

Batabyal, Sudip K., Lu, Shu En, and Vittal, Jagadese J.

Subjects
*PHOTOCATALYSTS, *NANOCRYSTALS, *X-ray powder diffraction, *TEMPERATURE effect, *ZINC compounds, *INDIUM compounds, *CRYSTAL morphology
Abstract

A one-pot method has been employed to synthesize the nanocrystals of In2S3, ZnIn2S4, and CdIn2S4. The single-source precursor [In(bipy)(SC{O}Ph)3] has been used for making In2S3 nanocrystals. On the other hand, [Zn(SC{O}Ph)2]·2H2O or [Cd(SC{O}Ph)2]·2H2O was reacted with [In(bipy)(SC{O}Ph)3] and decomposed to make the corresponding ternary metal indium sulfides. The nanocrystals have been characterized by X-ray powder diffraction (XRPD), transmission (TEM) and scanning electron microscopies (SEM), selected area electron diffraction (SAED) patterns, and energy-dispersive X-ray analysis (EDX). Parameters such as temperature, molar ratio of precursor to surfactant, duration of reaction time, and surfactant type were varied to investigate their influence on the morphology and size of nanomaterial. It was found that In2S3 exhibits different morphologies under different reaction conditions whereas the effect of these reactions conditions on the morphological evolution is not very prominent for ZnIn2S4 and CdIn2S4. All the synthesized metal ternary In2S3 showed efficient photocatalytic degradation of dye under ultraviolet (UV) light irradiation. We observed that the degradation of dye is much faster in chloroform than in the aqueous solution as the dispersion of nanoparticles is more homogeneous in chloroform solution. A comparison of the photocatalytic activity of In2S3 with ZnIn2S4 and CdIn2S4 having similar morphology and size shows that the photocatalytic activity of the ternary chalcogenides of In2S3 is considerably enhanced. [ABSTRACT FROM AUTHOR]

Published
2016
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188. Studies on Nanocrystalline Ag2Se

Author

Batabyal, Sudip K., primary, Basu, C., additional, Das, A. R., additional, Sanyal, G. S., additional, Banerjee, Dipali, additional, and Bandyopadhyay, N. R., additional

Published
2006
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196. Potato-based microporous carbon cake: Solar radiation induced water treatment.

Author

Lal, Sujith and Batabyal, Sudip K.

Subjects
IRRADIATION treatment of water, SOLAR radiation, SOLAR stills, WATER purification, POTATOES, AIR-water interfaces
Abstract

The use of solar-driven interfacial water evaporation for water desalination is a very interesting research topic for its high-performance water purification. The rapid evaporation of water at the air-water interface has been enhanced by solar absorbers. This work described the fabrication of a porous carbon cake with interconnected pores and super-hydrophilic surfaces from a potato slice. The fabricated carbon cake exhibits a high steam generation rate of 3.18 kg m-2 h-1 under 1 sun illumination. We also fabricated a large area evaporator and demonstrated the collection of more than 2.8 lit of condensed water from 0.8 m2 area in 5.5 h with natural (∼0.5 Sun) solar illumination. High evaporation rate was obtained due to the super-hydrophilic and less thermal conductivity of the as-fabricated carbon cake. Moreover, the device providing a high mechanical stability, which could be necessary for long-term potential usage. The high salt rejection ability of the device were investigated in detail. The total cost to generate freshwater from CEPC STE for nearly 8 months is $ 36.54/m2. Therefore, this system can be used for evaporation-based high concentrated dye and brine water purification in a cost-effective and highly efficient way. [Display omitted] • A porous carbon cake was fabricated with interconnected pores and hydrophobic surfaces from potato. • The carbon cake exhibits an excellent water evaporation and nearly 100% water purification. • Carbon cake exhibits a high steam generation rate of 3.18 kg m-2 h-1 under 1 sun illumination. • 2.8 lit of fresh water were collected from large area solar still of 0.8 m2 under 0.5sun natural sunlight for 5.5 h. [ABSTRACT FROM AUTHOR]

Published
2022
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197. Synthesis of Cu(In,Ga)(S,Se)2 thin films using an aqueous spray-pyrolysis approach, and their solar cell efficiency of 10.5%.

Author

Hossain, Md. Anower, Tianliang, Zhang, Keat, Lee Kian, Xianglin, Li, Prabhakar, Rajiv R., Batabyal, Sudip K., Mhaisalkar, Subodh G., and Wong, Lydia H.

Abstract

Semiconducting Cu(In,Ga)(S,Se)2 (CIGSSe) thin-film is prepared by the spray-pyrolysis of aqueous precursor solutions of copper (CuCl2), indium (InCl3), gallium (GaCl3), and sulphur (SC(NH2)2) sources. The non-vacuum approach of making the CIGSSe thin film using environmentally benign halide-based aqueous precursor solutions paves the way for fabricating solar cells at a much cheaper cost. Here, gallium (Ga) is incorporated into the host lattice of CuIn(S,Se)2 (CISSe) films grown on a Mo-coated soda-lime glass substrate to modify the optoelectronic properties of CIGSSe films. The bandgap engineered, Ga-doped CIGSSe film leads to better photovoltaic characteristics and shows one of the highest efficiency for CIGS thin film solar cell made by the non-vacuum deposition of environmentally-friendly precursors. The optimum efficiency of solar cells with the device configuration of glass/Mo/CIGSSe/CdS/i-ZnO/AZO show j–V characteristics of Voc = 0.621 V, jsc = 24.29 mA cm−2, FF = 69.84%, and a power conversion efficiency of 10.54% under simulated AM 1.5, 100 mW cm−2 illuminations, demonstrating its potential in making a cost-effective thin film solar cell. [ABSTRACT FROM AUTHOR]

Published
2015
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198. Formation of CuIn(SxSe1−x)2 microcrystals from CuInSe2 nanoparticles by two step solvothermal method.

Author

Wang, Mengxi, Batabyal, Sudip K., Lim, Hui Min, Li, Zhenggang, and Lam, Yeng Ming

Subjects
*COPPER compounds, *NANOPARTICLES, *CRYSTALLOGRAPHY, *CHEMICAL reactions, *BAND gaps, *ULTRAVIOLET-visible spectroscopy, *THIN films
Abstract

Here we introduced a two-step reaction to synthesize highly crystalline CuIn(S 1− x Se x ) 2 (CuInSSe) microcrystals from CuInSe 2 nanocrystals. CuInSSe micro particles can be obtained without toxic selenization or sulfurization process and the composition of sulfur and selenium can be easily controlled by varying the amount of precursor at different stages of the reactions. This synthetic route allows a technique that is simple and non-toxic together with the possibility of tuning the composition. XRD, HRTEM and SAED analysis of the final product confirmed the pure phase formation of CuInSSe. EDAX analysis shows the compositions of the final product matched with CuInSSe and the compositions of the product can tune by the reaction parameter. UV–Vis absorption spectra reveals a clear blue shift due to an increase in band gap with the increase of sulfur content. Initial photocurrent response suggests its possibility to be used as absorber materials in thin film solar cells. [ABSTRACT FROM AUTHOR]

Published
2015
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200. Electrodeposition of single phase CuInSe2 for solar energy harvesting: Role of different acidic additives.

Author

Sun, Juan, Batabyal, Sudip K., Tran, Phong D., and Wong, Lydia H.

Subjects
*ELECTROFORMING, *COPPER alloys, *SOLAR energy, *ENERGY harvesting, *METAL complexes, *PHOTOCURRENTS
Abstract

Highlights: [•] Oxalic acid successfully used as complexing agent for electrodeposition of CuInSe2. [•] One step electrodeposition successfully deposited phase pure CuInSe2. [•] Among different complexing agent oxalic acid resulted compact and pure CuInSe2 film. [•] CuInSe2 film fabricated with oxalic acid exhibits higher photocurrent in PEC measurement. [ABSTRACT FROM AUTHOR]

Published
2014
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