The effect of deposited noble-metals and their deposition routes on the photocatalytic decomposition of organic pollutants over M-TiBi_1.9%O₂ (M = Pt and Pd) under visible-light irradiation have been investigated. Glycol-assisted UV photodeposition and impregnation-reduction deposition routes (NaBH₄ or combined He/H₂) have been applied to prepare 1%M-TiBi_1.9%O₂ samples. The results show that the photocatalytic activity of 1%M/TiBi_1.9%O₂ via glycol-assisted UV pretreatment (1%M-365UV) is quite similar to those obtained after combined He/H₂ pretreatment (1%M-He/H₂), much superior to that of 1%M-NaBH₄. A mild reduction process via glycol-assisted UV irradiation for 1%M-TiBi_1.9%O₂ shows impressive advantages over high temperature He/H₂ reduction. The photocatalytic performance enhancement is attributed to the efficient capability of small Pt nanoparticles (NPs) for facilitating charge separation and providing active sites. It is hoped that this work could guide a facile synthesis of deposited noble-metal with small size toward achieving a highly-active supported noble-metal catalyst for diverse catalytic applications.

Graphic Abstract

中文翻译：

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贵金属沉积途径对M-TiBi 1.9％O 2（M = Pt和Pd）的特性和光催化活性的影响

研究了可见光下贵金属及其沉积途径对M-TiBi _1.9％ O ₂（M = Pt和Pd）上光催化分解有机污染物的影响。乙二醇辅助的紫外光沉积和浸渍-还原沉积路径（NaBH ₄或结合的He / H ₂）已用于制备1％M-TiBi _1.9％ O ₂样品。结果表明，乙二醇辅助的紫外线预处理（1％M-365UV）对1％M / TiBi _1.9％ O ₂的光催化活性与He / H ₂联合预处理（1％M-He /高₂），远远优于1％M-NaBH ₄。通过乙二醇辅助的紫外线辐照进行1％M-TiBi _1.9％ O ₂的轻度还原过程显示出优于高温He / H ₂还原的显着优势。光催化性能的提高归因于小Pt纳米颗粒（NPs）促进电荷分离和提供活性位点的有效能力。希望这项工作可以指导小尺寸沉积贵金属的简便合成，以实现用于各种催化应用的高活性负载型贵金属催化剂。

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