posted on 2024-02-20, 16:35authored byVelusamy Periyasamy, Shanhu Liu, M. Sathiya, Awais Ahmad, Elangovan Elamurugu, Asma A Alothman, Mohammad Sheikh Saleh Mushab, Fuchun Zhang, Xinghui Liu
Photoelectrochemical
(PEC) systems are inefficient, probably due
to charge carrier mobility, recombination rate, and solar light absorption.
Fabricating semiconductor-metal sulfide nanocomposites and nanostructured
materials can improve the absorption of solar radiation, electron–hole
separation, transport, and hydrogen (H2) and oxygen generation
to resolve the world’s energy dilemma. The vanadium-doped (V)
layered graphitic carbon nitride (g-CN)/MoS2 (MS) nanocomposite
was synthesized employing two-step solvent evaporation and thermal
condensation. This multilayer V-doped g-CN/MS nanocomposite broke
down methyl red dye in 60 min under sunlight. Due to visible light
absorption, the V-doped g-CN-MS nanostructure degrades the dye by
97.84%. We found that at 3.0 wt % V-doped g-CN/MS coated on TiO2 nanorods. The catalyst nanocomposites displayed a high photocurrent
density of 23.72 mA cm–2 and a H2 production
rate of 4477 mol h–1 cm–2. Additionally,
the microstructure, optical absorption behavior, and electrical conductivity
were all shown to contribute to these impressive PEC characteristics.
The V-modified g-CN/MS nanocomposite structures are effective and
regulated PEC catalysts, and this study suggests ways to improve PEC
water splitting and degradation.