College of Environment and Chemical Engineering & State Key Laboratory of Hollow-Fiber Membrane Materials and Membrane Processes, Tianjin Polytechnic University, Tianjin, China.
College of Science, Tianjin University of Science & Technology, Tianjin, China.
Photochem Photobiol. 2018 Mar;94(2):228-236. doi: 10.1111/php.12851. Epub 2018 Jan 28.
Pb (PO ) /Ag PO photocatalysts with different amounts of Pb (PO ) were successfully synthesised by the ion exchange method. The catalysts were characterized by X-ray diffractometry (XRD), High-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), Brunauer- Emmett-Teller (BET), Fourier transform infrared spectrometry (FT-IS), and ultraviolet-visible (UV-vis) spectroscopy. All Pb (PO ) /Ag PO photocatalysts show much higher photocatalytic activities than pure Ag PO under visible light irradiation in the methyl-orange (MO) decomposition. Especially, the 3.0 wt% Pb (PO ) /Ag PO photocatalyst shows the highest photoactivity and also high stability after five cycles. The MO degradation rate during each cycle is almost maintained at 97%. Photo-electrochemical measurement of photocatalysts verified that the enhancing photocatalytic activity was resulted from the electron-hole pair high separation. The photocatalytic activity enhancement of Pb (PO ) /Ag PO is closely related to ·OH, the main active oxygen species.
通过离子交换法成功合成了具有不同 Pb(PO4) 含量的 Pb(PO4)/Ag3PO4 光催化剂。采用 X 射线衍射仪(XRD)、高分辨率透射电子显微镜(HRTEM)、X 射线光电子能谱(XPS)、Brunauer-Emmett-Teller(BET)、傅里叶变换红外光谱(FT-IR)和紫外-可见(UV-vis)光谱对催化剂进行了表征。所有 Pb(PO4)/Ag3PO4 光催化剂在可见光照射下，在甲基橙(MO)分解中均表现出比纯 Ag3PO4 更高的光催化活性。特别是，3.0wt% Pb(PO4)/Ag3PO4 光催化剂具有最高的光活性，在经过五次循环后仍具有很高的稳定性。每个循环的 MO 降解率几乎都保持在 97%。对光催化剂的光电化学测量证实，增强的光催化活性是由于电子-空穴对的高效分离。Pb(PO4)/Ag3PO4 的光催化活性增强与·OH 密切相关，·OH 是主要的活性氧物种。
