TY - JOUR
T1 - Cocatalyst free nickel sulphide nanostructure for enhanced photocatalytic hydrogen evolution
AU - Muniyappa, Murthy
AU - N. Kalegowda, Sagara
AU - Shetty, Manjunath
AU - Sriramoju, Jagadeesh Babu
AU - Shastri, Mahesh
AU - Navakoteswara, Navakoteswara Rao
AU - De, Debasis
AU - M.V., Shankar
AU - Rangappa, Dinesh
N1 - Funding Information:
We acknowledge the support given by the Vision Group of Science and Technology, Department of Information Technology, Biotechnology and Science & Technology, Government of Karnataka , Grant No.: VGST/CESEM/2012-13/GRD-182 .
Publisher Copyright:
© 2021
PY - 2022/1/26
Y1 - 2022/1/26
N2 - Metal chalcogenides are highly active, inexpensive, and earth-abundant materials for photocatalytic hydrogen evolution. This work presents cocatalyst-free Nickel Sulphides (α and β phases) nanostructures for photocatalytic hydrogen generation. NiS nanostructures are synthesized by the solvothermal method by varying the water to ethanol ratio. The synthesized sample has shown an optical bandgap of 1.83 eV, which is favorable for H2 generation. X-ray diffractometer (XRD) patterns confirm the formation of hexagonal and rhombohedral crystal structures with high phase purity for both NiS-α and NiS-β nanostructures. The multifaceted regular-shaped morphology with 50 nm sized particles was confirmed by high-resolution transmission electron microscopy (HR-TEM). The photocatalytic H2 generation studies reveal that the NiS-α phase exhibited better H2 generation activity of 13.413 m mol h−1g−1 than the NiS-β phase of 12.713 m mol h−1g−1 under UV–Vis light irradiation without any cocatalyst.
AB - Metal chalcogenides are highly active, inexpensive, and earth-abundant materials for photocatalytic hydrogen evolution. This work presents cocatalyst-free Nickel Sulphides (α and β phases) nanostructures for photocatalytic hydrogen generation. NiS nanostructures are synthesized by the solvothermal method by varying the water to ethanol ratio. The synthesized sample has shown an optical bandgap of 1.83 eV, which is favorable for H2 generation. X-ray diffractometer (XRD) patterns confirm the formation of hexagonal and rhombohedral crystal structures with high phase purity for both NiS-α and NiS-β nanostructures. The multifaceted regular-shaped morphology with 50 nm sized particles was confirmed by high-resolution transmission electron microscopy (HR-TEM). The photocatalytic H2 generation studies reveal that the NiS-α phase exhibited better H2 generation activity of 13.413 m mol h−1g−1 than the NiS-β phase of 12.713 m mol h−1g−1 under UV–Vis light irradiation without any cocatalyst.
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U2 - 10.1016/j.ijhydene.2021.11.171
DO - 10.1016/j.ijhydene.2021.11.171
M3 - Article
AN - SCOPUS:85121224623
SN - 0360-3199
VL - 47
SP - 5307
EP - 5318
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 8
ER -
