Cai Heshan, Cheng Linmei, Xu Feng, Wang Hailong, Xu Weicheng, Li Fuhua
Department of Transportation and Civil Architecture, Foshan University, Foshan 528000, People's Republic of China.
R Soc Open Sci. 2018 Aug 15;5(8):180752. doi: 10.1098/rsos.180752. eCollection 2018 Aug.
A heterojunction catalyst, BiVO/P25, was successfully fabricated using a one-step hydrothermal method. The prepared composite was characterized using XRD, XPS, Raman, FT-IR, UV-vis, SEM, HRTEM and PL. The HRTEM pictures revealed that the heterostructured composite was composed of BiVO and P25, and from the pictures of SEM we could see the P25 nanoparticles assembling on the surface of flower-shaped BiVO nanostructures. The XPS spectra showed that the prepared catalyst consisted of Bi, V, O, Ti and C. The photocatalytic activity of BiVO/P25 was evaluated by degraded methyl blue (MB) and tetracycline under visible light illumination ( > 420 nm), and the results showed that BiVO/P25 composite has a better photocatalytic performance compared with pure BiVO and the most active c-BiVO/P25 sample showed enough catalytic stability after three successive reuses for MB photodegradation. The enhanced photocatalytic performance could mainly be attributed to the better optical absorption ability and good absorption ability of organic contaminants.
采用一步水热法成功制备了异质结催化剂BiVO/P25。利用XRD、XPS、拉曼光谱、傅里叶变换红外光谱、紫外可见光谱、扫描电子显微镜、高分辨率透射电子显微镜和光致发光对所制备的复合材料进行了表征。高分辨率透射电子显微镜照片显示，异质结构复合材料由BiVO和P25组成，从扫描电子显微镜照片中可以看到P25纳米颗粒聚集在花状BiVO纳米结构的表面。XPS光谱表明，所制备的催化剂由Bi、V、O、Ti和C组成。通过在可见光照射（>420nm）下降解亚甲基蓝（MB）和四环素评估了BiVO/P25的光催化活性，结果表明，与纯BiVO相比，BiVO/P25复合材料具有更好的光催化性能，并且最具活性的c-BiVO/P25样品在连续三次重复用于MB光降解后表现出足够的催化稳定性。光催化性能的增强主要归因于更好的光吸收能力和对有机污染物的良好吸附能力。
