Zhang Lihua, Dong Guowen, Liu Xiaomin, Niu Yu, Gao Wei, Yang Qiong, Li Zaixing
Fujian Provincial Key Laboratory of Resources and Environmental Monitoring and Sustainable Management, School of Resources and Chemical Engineering, Sanming University, Sanming, 365004, China.
Department of Environmental Engineering, Beijing Institute of Petrochemical Technology, Beijing, 102617, China.
Photochem Photobiol Sci. 2024 Sep;23(9):1659-1672. doi: 10.1007/s43630-024-00619-1. Epub 2024 Aug 26.
The catalysts with three-dimensional porous (3DP) CeO, LaFeO and SrTiO are synthesized by sol-gel method and chemical precipitation method. The resulting multi-component 3DP CeO/LaFeO/SrTiO composite material featured a high specific surface area (26.08 m/g), which can provide more surface active sites to improve adsorption capacity and catalytic performance. The photocatalytic, Fenton-like, photo-Fenton-like performance of the catalyst are studied on decolorization of RhB under UV irradiation, respectively. 3DP CeO/LaFeO/SrTiO exhibits high catalytic performance. Compared with photocatalytic or Fenton-like performance, 3DP CeO/LaFeO/SrTiO catalyst exhibits higher photo-Fenton-like performance, facilitating efficient decolorization of the rhodamine B. Moreover, the initial reaction rate on decolorization of RhB with 3DP CeO/LaFeO/SrTiO is 10.55, 5.52, 3.67 and 1.51 times higher than that with SrTiO, LaFeO, 3DP CeO and 3DP CeO/LaFeO, respectively. Meanwhile, 3DP LaFeO/CeO/SrTiO has a wider pH usage range in the synergistic reaction. Finally, a catalytic mechanism for the decolorization of rhodamine B is proposed. The continuous cycling of Fe/Fe and Ce/Ce and the production of active substances are achieved under the photo-Fenton-like effect of the catalyst.
采用溶胶-凝胶法和化学沉淀法合成了具有三维多孔（3DP）结构的CeO、LaFeO和SrTiO催化剂。所得的多组分3DP CeO/LaFeO/SrTiO复合材料具有较高的比表面积（26.08 m²/g），能提供更多的表面活性位点以提高吸附能力和催化性能。分别研究了该催化剂在紫外光照射下对罗丹明B脱色的光催化、类芬顿、光类芬顿性能。3DP CeO/LaFeO/SrTiO表现出较高的催化性能。与光催化或类芬顿性能相比，3DP CeO/LaFeO/SrTiO催化剂表现出更高的光类芬顿性能，有利于罗丹明B的高效脱色。此外，3DP CeO/LaFeO/SrTiO对罗丹明B脱色的初始反应速率分别比SrTiO、LaFeO、3DP CeO和3DP CeO/LaFeO高10.55、5.52、3.67和1.51倍。同时，3DP LaFeO/CeO/SrTiO在协同反应中的pH使用范围更广。最后，提出了罗丹明B脱色的催化机理。在催化剂的光类芬顿效应下实现了Fe³⁺/Fe²⁺和Ce⁴⁺/Ce³⁺的连续循环以及活性物质的产生。
