光催化
催化作用
纳米棒
环境修复
化学工程
可见光谱
材料科学
多孔性
氧化还原
化学
光化学
纳米技术
石墨氮化碳
地下水修复
污染
无机化学
有机化学
工程类
生物
光电子学
生态学
作者
Xiaocui Wu,Qingshan Zhao,Fang Guo,Guangsen Xia,Xiaojie Tan,Huiyuan Lv,Zhaoxuan Feng,Wenting Wu,Jingtang Zheng,Mingbo Wu
出处
期刊:Carbon
[Elsevier]
日期:2021-10-01
卷期号:183: 628-640
被引量:50
标识
DOI:10.1016/j.carbon.2021.07.006
摘要
Merging photocatalysis with Fenton-like reaction provides a promising synergetic advanced oxidation technology for water treatment, whereas the rational design of efficient cooperative photo-Fenton system still remains a great challenge. In this study, a ternary α-FeOOH/carbon dots/porous g-C3N4 (α-FeOOH/CDs/p-GCN) composite is developed as visible-light-driven heterogeneous photo-Fenton catalyst for contaminated water remediation. α-FeOOH nanorods are in-situ grown on porous g-C3N4 substrates, among which CDs are intercalated as high-speed electron transmission bridges, simultaneously preventing the photogenerated electron-hole recombination and accelerating the Fe3+/Fe2+ redox cycle. The distinctive heterostructure and synergetic catalytic effect endow α-FeOOH/CDs/p-GCN with superior efficiency, reusability, and universality for recalcitrant pollutant elimination, the reaction rate of which is nearly 13.6, 7.3, 3.4, 1.4, and 5.1 times higher than that of α-FeOOH, bulk g-C3N4 (b-GCN), p-GCN, α-FeOOH/p-GCN, and α-FeOOH/CDs/b-GCN, respectively. The FeOOH/CDs/p-GCN also demonstrates excellent tolerance to realistic environmental matrices including deionized water, sea water, river water, wastewater, and underground water. HO• and •O2− radicals are proved to be the predominant contributors in the photo-Fenton system. This work provides an efficient synergetic visible-light-driven photo-Fenton catalyst possessing great potential for practical contaminated water remediation.
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