Instituto Nacional del Carbón (INCAR-CSIC), c/Francisco Pintado Fe 26, 33011 Oviedo, Spain.
J Hazard Mater. 2013 Feb 15;246-247:126-34. doi: 10.1016/j.jhazmat.2012.12.009. Epub 2012 Dec 13.
The aim of this study was to assess the activity of catalysts formed by nanostructured zinc oxide supported on stainless steel wire mesh for the photocatalytic degradation of methylene blue under UV irradiation. Catalysts prepared by means of different low temperature synthesis methods, as described in a previous work (Vu et al., Mater. Res. Bull. 47 (2012) 1577-1586) were tested. A new activity parameter was introduced in order to compare the catalytic activity of the different catalysts. The best catalyst showed a catalytic activity higher than that of the reference material TiO(2) P25 (Degussa-Evonik). This high activity is attributed to a higher quantum yield derived from the small particle length of the ZnO deposited on the wire mesh. The photocatalytic degradation kinetics of methylene blue fitted a potential model with n orders ranging from 0.5 to 6.9. Reaction orders over 1 were attributed to catalyst deactivation during the reaction resulting from the photocorrosion of ZnO.
本研究旨在评估负载在不锈钢网上的纳米结构氧化锌催化剂在紫外光照射下光催化降解亚甲基蓝的活性。催化剂通过不同的低温合成方法制备，如前一篇工作（Vu 等人，Mater. Res. Bull. 47 (2012) 1577-1586）所述。引入了一个新的活性参数来比较不同催化剂的催化活性。最佳催化剂表现出高于参考材料 TiO(2) P25（Degussa-Evonik）的催化活性。这种高活性归因于沉积在金属网上的 ZnO 小颗粒长度导致的更高量子产率。亚甲基蓝的光催化降解动力学符合具有 0.5 到 6.9 阶的潜在模型。反应阶数大于 1 归因于 ZnO 的光腐蚀导致催化剂在反应过程中失活。
