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13 results on '"Tawale, Jai Shankar"'

4. Nanostructured Bi2Se3‑Decorated TiSe2 Pyramids on Ti Foil for Photoelectrochemical Water Splitting.

Author

Singh, Bheem, Gautam, Sudhanshu, Behera, Govinda Chandra, Sahoo, Utkalika P., Kumar, Rahul, Aggarwal, Vishnu, Tawale, Jai Shankar, Sahoo, Pratap Kumar, Ganesan, Ramakrishnan, Roy, Somnath C., and Kushvaha, Sunil Singh

Abstract

The interface of two-dimensional transition metal dichalcogenides hosts collective interactions between the electronic structures that tune the charge density wave (CDW) states and the photoelectrochemical (PEC) properties of heterostructures. This work reports the influence of the interface on the CDW and PEC of a sputtered Bi2Se3/TiSe2 heterostructure on Ti metal foils. The hexagonal nanoflakes on the spiral-pyramid-like surface morphology of pristine TiSe2 confirm the Bi2Se3 decoration on the TiSe2 sample. The stoichiometric growth of TiSe2 and Bi2Se3 was revealed from X-ray photoelectron spectroscopy and Raman spectroscopy. The temperature-dependent Raman spectroscopy demonstrates the evolution of EgCDW and A1gCDW optical phonon modes with increased CDW phase transition temperature for the Bi2Se3/TiSe2 heterostructure. The enhancement of photoresponsive properties of the Bi2Se3/TiSe2 heterostructure under a solar light intensity of 100 mW/cm2 (AM = 1.5 G) in 0.5 M Na2SO4 electrolyte solution toward suitable water splitting was validated from the PEC measurements. This engineered heterostructure can pave the futuristic path to studying light-active electrodes with tunable CDW properties of pristine TiSe2 and Bi2Se3/TiSe2 heterostructures grown on flexible Ti substrates. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Heterojunction Bi2Se3/Sb2Se3 on Flexible Mo Metal Foils for Photoelectrochemical Water Splitting Applications

Author

Singh, Bheem, primary, Gautam, Sudhanshu, additional, Aggarwal, Vishnu, additional, Chandra Behera, Govinda, additional, Khatun, Nasima, additional, Kumar, Rahul, additional, Tawale, Jai Shankar, additional, Ganesan, Ramakrishnan, additional, Chanda Roy, Somnath, additional, Singh, Vidya Nand, additional, and Kushvaha, Sunil Singh, additional

Published
2023
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12. Modification at Lattice Scale for an Optimized Optical Response of Alx(ZnO)1-x Nanostructures

Author

Srivastava, Avanish Kumar, Senthil, Karuppanan, M, Deepa, Gakhar, Ruchi, Tawale, Jai Shankar, Srivastava, Avanish Kumar, Senthil, Karuppanan, M, Deepa, Gakhar, Ruchi, and Tawale, Jai Shankar

Abstract

We report the systematic changes of nano-scaled featur es and optical properties in a promising transparent oxide material, namely, Al x (x = 0, 1, 2 and 5%) doped ZnO 1-x (AZO). Electron microscopy investigations revealed the alterations at lattice scale depending on th e presence of Al-content in ZnO nanostructures. Lat- tice spacings of 0.26 and 0.28 nm oriented along the (0002) and (10 1 0) planes, respectively, were attributed to euhedral-and facetted-structures of hexagonal-ZnO. Th e AZO samples were furthe r characterized by XRD, SEM, UV-vis spectrophotometry, Raman spectroscopy and photoluminescence studies. It has been shown that at a dopant concentration of 2% Al in ZnO, an optimal balance could be achieved between microstruc- ture and optical properties.

Published
2011

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