A suitable electronic structure and efficient charge separation are significant for the performance of photocatalytic water splitting. Herein, we have designed a two-dimensional GeI2/C2N van der Waal (vdW) heterostructure and...

This research work delved into the photocatalytic degradation of monoazo dye (methyl orange) and diazo dye (congo red) in aqueous solution using Fe 3+ /C/S-doped TiO 2 nanocomposites. The nanocomposites were synthesised through sol-gel method and characterized using XRD, FTIR, SEM, TEM, EDX, BET and UV-Vis. Photocatalytic degradation of the dyes was monitored under simulated visible light using pristine TiO 2 , C/S/doped-TiO 2 and Fe 3+ /C/S doped-TiO 2 with varying concentrations of Fe 3+ . The influence of catalyst doping, solution pH, and light intensity were also examined. Doping TiO 2 with Fe 3+ /C/S caused reduction in its band gap value with the resultant improvement in its visible light activity. The photocatalytic efficiency of the catalysts is given as follows: TiO 2 < C/S/TiO 2 < Fe 3+ /C/S-TiO 2 with Fe 3+ /C/S-TiO 2 (0.3% Fe 3+ ) as the best performing photocatalyst. The monoazo dye experienced higher degradation efficiency than the diazo dye. Degradation of the azo dyes was observed to decrease with increasing pH from 2 to 12. Increased visible light intensity enhanced the photodegradation efficiency of the dye. Dye decolourization was observed to be faster than its mineralization.

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Type-II g-GaN/Sc2CO2 van der Waals heterostructure with electronic properties has potential for nanoelectronics, optoelectronics and photovoltaic device applications.

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Sustainable hydrogen (H2) production via photocatalytic water splitting is considered the most promising energy storage, where two-dimensional van der Waals heterostructure, composed of two or more 2D monolayer materials, has...

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A series of neodymium-doped titanium dioxide (Nd-TiO 2 ) decorated on graphene oxide (GO) were synthesized by sol-gel method. The structures, morphologies and optical properties of the nanocomposites (Nd-TiO 2 -GO) were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy. The photocatalytic study of Nd-TiO 2 -GO nanocomposites was evaluated via the degradation of indigo carmine under simulated solar light. Results demonstrated that the photodegradation efficiency of indigo carmine solutions irradiated by solar simulated light for 3 h with the nanocomposites used as a catalyst reached a level of 92 % (0.6 % Nd). This high photocatalytic degradation of indigo carmine solutions by the Nd-TiO 2 -GO nanocomposites is ascribed to the spherical nanocrystalline size of TiO 2 . Graphical Abstract