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Interface-engineered CdS/WO3/NiNb2O6 ternary nanocomposite as a visible-light-active photocatalyst for hydrogen production: Laboratory-scale to large-scale demonstration
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DOI：10.1016/j.compositesb.2026.114062.png)
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Abstract
En 中文
Solar-driven hydrogen generation via photocatalytic water-splitting is a straightforward and environmentally benign strategy for a sustainable clean energy production. Here, a NiNb2O6-based ternary nanocomposite integrated with CdS/WO3 system was developed to enhance photocatalytic hydrogen production, spanning from laboratory-scale investigations to large-scale demonstration. NiNb2O6, with a narrow band gap of 2.16 eV and columbite structure, exhibits excellent chemical and thermal stability, making it well-suited for visible-light-driven hydrogen production. CdS and WO3 possess band gaps of 2.21 eV and 2.67 eV, respectively, further broadening the catalyst's light absorption spectrum. The interface-engineered CdS/WO3/NiNb2O6 ternary nanocomposite exhibited significantly enhanced hydrogen evolution under both Xenon lamp irradiation and natural sunlight. The optimized composition of CdS/WO3/NiNb2O6 achieved a maximum hydrogen evolution rate of 67.4 mmol/h/gcat and exhibited outstanding stability. This improved performance is attributed to the formation of a multi-heterostructure that facilitates efficient spatial charge separation across the distinct morphologies of the composite and enhances stability compared to CdS/WO3, as evidenced by VB-XPS analysis, UV–DRS measurements, and post-characterizations. To assess practical applicability and scalable hydrogen production, the catalyst was further demonstrated under direct sunlight using an in-house designed and constructed photoreactor of area (12 cm × 12 cm), achieving a maximum hydrogen production rate of 19 mL/h.
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