期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 263, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118311
关键词
Electron transfer; MCM-48; Catalytic ozonation; Bonding bridge; Carbamazepine
资金
- National Natural Science -Foundation of China [51978288]
- Major Science and Technology Program for Water Pollution Control and Treatment in China [20172X07202-004]
Electron-rich center and electron-poor center were formed around Si and metal atom linked via Si-O-metal bonding bridge in the Co-Ce doping mesoporous molecular sieves MCM-48 for catalytic ozonation of carbamazepine (CBZ). The density functional theory (DFT) calculations of Co-Ce-MCM-48 concluded that unique Co-O-Si-O-Si-O-Ce had a much lower energy gap than those of Si-O-Si-O-Si-O-Si, Co-O-Si-O-Si-O-Ce and Co-O-Si-O-Si-O-Ce. The successful immobilization of Co-Ce was verified by X-ray absorption fine-structure (XAFS), Raman and 29Si MAS-NMR spectrum. Co-Ce-MCM-48/O-3 process achieved 75.6% mineralization of CBZ at 60 min by generation of reactive oxygen species (ROSs) and enhanced redox behaviors of Ce(III)/Ce(IV) and Copp/Coale. Two new intermediates (P13 and P14) of CBZ in Co-Ce-MCM-48/O-3 were observed by DFT and LC-MS/MS results. This study opened a new insight by employing an integration of theoretical and experimental techniques to elucidate the synergistic effect of uneven electrons distribution at Co-O-Si-O-Si-O-Ce and catalytic reaction pathway of CBZ.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据