Insufficient surface catalytic sites and charge kinetics constrains the progress of CO photoreduction reaction. In this work, oxygen vacancy-enriched Ag/brookite TiO hybrid by anchoring Ag nanoparticles on brookite TiO has been synthesized through the transformation of Ti-glycerol precursor with simultaneous reduction of Ag in the diethylene glycol (DEG)-HO solution. In particular, the involving of oxygen vacancy and Ag species could extend light absorption range, facilitate charge separation and transfer, and accumulate the electrons on Ag center. As a result, the Ag/brookite TiO with formed Schottky junction reveals enhanced CO photoreduction performance compare with pristine TiO and solvothermal treated TiO (TiO-sol). Particularly, the oxygen vacancy-enriched Ag/TiO hybrid shows the highest catalytic activity with CH and CO yields. This work offers an approach to modify brookite phase TiO with metallic sites and oxygen vacancy for improved CO photoreduction.

中文翻译：

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富氧空位 Ag/板钛矿 TiO2 肖特基结，用于增强光催化 CO2 还原

表面催化位点和电荷动力学不足限制了CO光还原反应的进展。在这项工作中，通过Ti-甘油前体的转化，同时在二甘醇（DEG）-H2O溶液中还原Ag，合成了通过将Ag纳米颗粒锚定在板钛矿TiO上而富氧空位的Ag/板钛矿TiO杂化物。特别是，氧空位和Ag物质的参与可以扩大光吸收范围，促进电荷分离和转移，并在Ag中心积累电子。因此，与原始 TiO 和溶剂热处理的 TiO (TiO-sol) 相比，形成肖特基结的 Ag/板钛矿 TiO 表现出增强的 CO 光还原性能。特别是，富氧空位的 Ag/TiO 杂化物表现出最高的催化活性，CH 和 CO 产率也最高。这项工作提供了一种用金属位点和氧空位修饰板钛矿相 TiO 的方法，以改善 CO 光还原。