催化作用
亚甲蓝
降级(电信)
纳米颗粒
化学工程
材料科学
污染物
选择性催化还原
聚合
核化学
化学
纳米技术
光催化
聚合物
复合材料
有机化学
工程类
电信
计算机科学
作者
Xuelian Chen,Tong Zhou,Xiqiang Pan,Hong Li
标识
DOI:10.1016/j.colsurfa.2023.131085
摘要
We demonstrate a simple approach for fabricating polydopamine microcapsules decorated with silver nanoparticles ([email protected] MCs) as highly efficient catalysts for water purification. Polydopamine microcapsules (PDA MCs) were formed on the MnCO3 template from self-polymerization and the removal of template under mild EDTA solution, followed by in situ reduction of Ag+ by PDA and growth of monodispersed Ag nanoparticles. Under optimized conditions, the [email protected] MCs exhibits 41.56 wt% of Ag loading contents and superior catalytic performance for the degradation of organic pollutants with rate constant of 2.93 min-1 for methylene blue and 1.03 min-1 for 4-nitrophenol. The excellent catalytic activity can mainly be ascribed to high surface roughness of microcapsules, high Ag loading ratio, and uniform distribution of Ag nanoparticles. In addition, this catalyst can be recycled for five times with degradation efficiency higher than 98%. The [email protected] MCs possessed fast reduction rate, high catalytic activity, and good recyclability as well as facile preparation and easy separation, showing great potential for the application in wastewater treatment.
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