One‐Step Photo‐Induced Self‐Assembly Syntheses of High‐Dispersion CuO‐Loaded Mesoporous Silica for Methylene Blue Catalytic Degradation

• Published in: ChemistrySelect (Weinheim) 2023-09, Vol.8 (34), p.n/a
• Main Authors: Wu, Mei, Li, Bowen, Zhao, Xin, Xu, Weichuan, Ding, Jiahui, Wang, Kuoteng, Chao, Yitong, Jiang, Jinlong, Han, Haifeng
• Format: Article
• Language: English
• Subjects: Fenton-like reactions; heterogeneous catalysis nanopaticles; photo-induced; self-assembly
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202302371

In this work, a novel one‐step photo‐induced self‐assembly method have been applied to fabricate high dispersion CuO nanoparticles loading on the mesoporous silica (CuONP/MS). This method can effectively control the size of CuO metallic particles, having advantages of time saving, easy operation, and environmentally friendly. CuONP/MS with different Si/Cu molar ratio were used as heterogeneous Fenton‐like catalysts to remove methylene blue (MB) from wastewater with the help of H2O2. CuONP/MS(15), having proper copper doping amount, uniform CuO distribution in nano range and suitable Cu2+/Cu+ ratio, exhibited a higher activity (96 % within 20 min) and stability (80 % after five cycles of use) in MB degradation. CuONP/MS(15) could work in a wide range pH with low metal leaching concentration. Fluorescence(FL) results proved that it is more easily to form oxygen defect, which generate more surface hydroxyl groups as reaction sites for MB removal. One‐step photo‐induced self‐assembly method were proved to be an attractive alternative method to prepare metal loading mesosilica catalysts. CuONP/MS catalysts were efficient heterogeneous Fenton‐like system exemplified by the removal of organic pollutants from wastewater. In this study, the high dispersion CuO nanoparticles loaded on the mesoporous silica (CuONP/MS) were prepared through the one step photo‐induced self‐assembly method, which is efficient and environment friendly. Characterizations proved that this method can effectively control the size and dispersion of CuO metallic particles and the ratio of Cu2+/Cu+. CuONP/MS exhibits a higher activity and stability for MB degradation in a wide range pH.