Gebze Institute of Technology, Environmental Engineering Dept., Turkey.
Gebze Institute of Technology, Materials Science and Engineering Dept., Turkey.
J Colloid Interface Sci. 2014 Sep 15;430:6-11. doi: 10.1016/j.jcis.2014.05.022. Epub 2014 May 23.
Photocatalytic degradations of azo dye (RR 180), pesticide (2,4-D) and antibiotic (enrofloxacin) in aqueous solutions were performed and compared by using pure ZnO and ZnO/TiO2 composite (at 1:1 ZnO to TiO2 mole ratio) catalysts in a self-supporting plate form. The plates were produced by tape casting of the constituent powder slurries and sintering at 600°C. Photocatalytic degradations of these pollutants were carried out under UVA and UVC irradiations for 120 min. Maximum degradation was obtained for 2,4-D solution using pure ZnO plates under UVC. Due to the photolysis effect, UVC wavelength yielded higher efficiency values for all the chemicals than UVA. The discrepancy in the photocatalytic performances of the pure ZnO and the ZnO/TiO2 composite plates were not found to be significant. The plates were found to be effective for the consecutive degradation tests which indicated their potentiality in extended applications.
采用纯 ZnO 和 ZnO/TiO2 复合（1:1 ZnO 与 TiO2 摩尔比）催化剂，以自支撑板的形式在水溶液中进行了偶氮染料（RR 180）、农药（2,4-D）和抗生素（恩诺沙星）的光催化降解，并进行了比较。通过将组成粉末浆料浇铸在带上并在 600°C 下烧结来制备板。在 UVA 和 UVC 辐射下进行了 120 分钟的光催化降解。在 UVC 下，纯 ZnO 板对 2,4-D 溶液的降解效果最佳。由于光解作用，对于所有化学物质，UVC 波长的效率值均高于 UVA。纯 ZnO 和 ZnO/TiO2 复合板的光催化性能差异不显著。这些板在连续降解测试中表现出有效性，这表明它们在扩展应用中具有潜力。
