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Photocatalytic NO Removal by Ternary Composites Bisub.12GeOsub.20/BiOCl/Wsub.18Osub.49 Using a Waste Reutilization Strategy
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Photocatalytic NO Removal by Ternary Composites Bisub.12GeOsub.20/BiOCl/Wsub.18Osub.49 Using a Waste Reutilization Strategy
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Journal Article
Photocatalytic NO Removal by Ternary Composites Bisub.12GeOsub.20/BiOCl/Wsub.18Osub.49 Using a Waste Reutilization Strategy
2025
Overview
Heterojunction creation is demonstrated as an effective strategy to enhance the transfer and separation of charge carriers, which is beneficial for subsequent photocatalytic reactions. In this study, “sea urchin-like” W[sub.18]O[sub.49] was in situ-grown on the surface of Bi[sub.12]GeO[sub.20] through a hydrothermal process, and the released Cl[sup.−] anions tended to produce BiOCl simultaneously. Systematical characterizations confirmed the construction of ternary composites Bi[sub.12]GeO[sub.20]/BiOCl/W[sub.18]O[sub.49] (GBW), in which Type I and Z-scheme models were integrated to promote charge carrier migration and separation by combining the structural merits of both models. Under UV–visible light, the catalytic performance of the as-synthesized samples was tested in terms of NO oxidation removal. Compared to pure Bi[sub.12]GeO[sub.20], the composite GBW5 showed the highest NO photocatalytic removal efficiency of 42%, which was nearly four times that of pure Bi[sub.12]GeO[sub.20]. These improvements were mainly due to enhanced light absorption, suitable morphological features, effective separation of charge carriers, and the boosted generation of reactive species in the GBW series. This study paves the way for the construction of Bi[sub.12]GeO[sub.20]-based ternary composites using a comprehensive utilization of waste method and the employment of the composites for the photocatalytic removal of low concentrations of NO at the ppb level.
Publisher
MDPI AG
Subject
