Yang Jia, Fu Mingyan, Tan Mingdan, Tian Yanling, Sun Xiaorui, Huang Huisheng
Chongqing Key Laboratory of Inorganic Special Functional Materials, College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling, Chongqing 408100, P. R. China.
ACS Omega. 2020 Oct 8;5(41):26755-26762. doi: 10.1021/acsomega.0c03743. eCollection 2020 Oct 20.
Herein, a 3.0%-Au/SrCeWO sample was prepared for the photocatalytic reduction of the CrO ion. The photocatalyst was characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible diffuse reflectance spectra. The SrCeWO sample presented a photocatalytic reduction activity that is better than those of the Ce-doped sample and the intrinsic sample. Thereafter, different metal elements, Cu, Ag, Au, and Pt, were used as cocatalysts, which were loaded on the SrCeWO sample. The 3.0%-Au/SrCeWO photocatalyst showed optimal photocatalytic reduction activity in a 8 vol % methanol solution (pH = 7) under visible light irradiation. The kinetic constant of the optimal one is 0.0039 min, which is 1.86 times that of the SrCeWO sample. The photocatalyst is stable enough after a 24 h photocatalytic experiment.
在此，制备了3.0%-Au/SrCeWO样品用于光催化还原CrO离子。通过X射线衍射、扫描电子显微镜、X射线光电子能谱和紫外-可见漫反射光谱对光催化剂进行了表征。SrCeWO样品呈现出比Ce掺杂样品和本征样品更好的光催化还原活性。此后，使用不同的金属元素Cu、Ag、Au和Pt作为助催化剂，将它们负载在SrCeWO样品上。3.0%-Au/SrCeWO光催化剂在8体积%甲醇溶液（pH = 7）中可见光照射下表现出最佳的光催化还原活性。最佳样品的动力学常数为0.0039 min，是SrCeWO样品的1.86倍。经过24小时的光催化实验后，光催化剂足够稳定。
