13210nas a2200169 45000080041000002450122000412100069001632600028002324900009002605201253400269100001812803700002612821700001412847700002112861700002612882856013212908 2020 eng d00aPhotocatalytic hydrogen production from H2S using nanostructured CNT blended CdZnS/Fe2O3 thin film on glass substrate0 aPhotocatalytic hydrogen production from H2S using nanostructured bIOP Publishing LtdcMAR0 v14953 a

A co-precipitation method was employed to prepare the CNT blended CdZnS/Fe2O3 photocatalyst. Using the powder photocatalyst, the thin film of CNT blended CdZnS/Fe2O3 photocatalyst over a glass substrate was prepared using the drop-casting method. The obtained thin film was characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray analysis (EDAX), photoluminescence (PL), and hydrogen production activity studies in order to obtain information on their structural, morphology, chemical composition, optical and hydrogen production efficiency. The hydrogen production activity of catalyst or effective conversion of H2S into hydrogen (H2) and sulfur (S) using thin-film photocatalyst was evaluated using a simulated sulfide solution. The results showed that 1 mg of CNT blended CdZnS/Fe2O3 catalyst coated as thin film over glass substrate (4.69 cm2) showed the highest hydrogen production value of 3180 μmol h−1g−1; compared to that of 1 mg CNT blended CdZnS/Fe2O3 powder of 2510 μmol h−1g−1. From the above results, it is concluded that the thin film form of photocatlyst produced more hydrogen than the powder form. This is attributed to the effective charge separation and increased specific surface area in thin film photocatalyst.

1 aRaja, Anthony1 aVijayarengan, Preethi1 aPal, Yash1 aNalajala, Naresh1 aGopinath, Chinnakonda uhttps://library.ncl.res.in/content/photocatalytic-hydrogen-production-h2s-using-nanostructured-cnt-blended-cdznsfe2o3-thin-film11736nas a2200181 45000080041000002450147000412100069001882600008002573000011002654900007002765201101800283100002611301700002511327700002111352700002111373700003011394856013011424 2025 eng d00aThin-film approach for scalability and enhancement of solar hydrogen production with CNT integrated Ce-doped-TiO2 composite in direct sunlight0 aThinfilm approach for scalability and enhancement of solar hydro cSEP a1001150 v103 a

Solar hydrogen production by photocatalysis has long been considered as an important energy option. Whichever photocatalyst succeeds, methods should be available to scale-up in a most sustainable and cost-effective manner, and the present work addresses this specific issue. In the present study, Ce-doped in the TiO2 lattice (Ce-TiO2) and the same integrated with CNT (CNT-Ce-TiO2; (CCT)) composite was synthesized and characterized. Current study demonstrates the synergistic integration of Ce-TiO₂ as a light absorber and charge generator with CNTs as efficient charge separation at heterojunctions as well as charge transporter in a thin-film configuration (lab-scale (4.7 cm2), bench-scale (500 cm2)). Improved H2 generation under direct sunlight demonstrated in thin film form, than in particulate suspension, is attributed to efficient light absorption, particularly for electron-hole pair separation and their dispersion to redox sites. Additionally, the role of the binder is highlighted for improving H2 yield and the sustainability of the thin-film form of photocatalyst. ∼200 mg (1 g) CCT coated over 500 cm2 (2500 cm2) photocatalyst produced 21.6 mmol/h (102 mmol/h) H2 in sunlight. Present results provides a proof of concept that the thin film form of photocatalyst displays, at least 10 times, higher H2 yield than its powder counterpart, depending on the measurement conditions. A non-linear enhancement in H2 yield with small and large area thin-film indicates complex underlying factors and highlights the scope for further improvements.

1 aVijayarengan, Preethi1 aMaria, Anthony, Raja1 aAshadevi, K., S.1 aNalajala, Naresh1 aGopinath, Chinnakonda, S. uhttps://library.ncl.res.in/content/thin-film-approach-scalability-and-enhancement-solar-hydrogen-production-cnt-integrated-ce