期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 608, 期 -, 页码 2075-2087出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.10.119
关键词
C3N4; Self-Fenton reaction; Internal-electric-field; Type-I heterojunction; H2O2
资金
- National Natural Science Foundation of China [21674028]
- State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering [2021-K17]
- Open Project of State Key Laboratory of Supramolecular Structure and Materials [Sklssm 202033]
- Post-graduate Innovation Research Program of Heilongjiang University [YJSCX2020-066HLJU]
A type-I phosphorus-doped carbon nitride/oxygen-doped carbon nitride heterojunction was designed for photocatalysis-self-Fenton reaction, effectively addressing the issues of H2O2 source and low utilization efficiency in traditional Fenton reaction, resulting in efficient degradation. The cascade mode in photocatalysis-self-Fenton reaction significantly improved the production rate and utilization efficiency of H2O2.
Herein, a type-I phosphorus-doped carbon nitride/oxygen-doped carbon nitride (P-C3N4/O-C3N4) heterojunction was designed for photocatalysis-self-Fenton reaction (photocatalytic H2O2 production and following Fenton reaction). In P-C3N4/O-C3N4, the photoinduced charge carriers were effectively separated with the help of internal-electric-field near the interface, ensuring the high catalytic performance. As a result, the production rate of H2O2 in an air-saturated solution was 179 mu M.h(-1), about 7.2, 2.5, 2.5 and 2.1 times quicker than that on C3N4, P-C3N4, O-C3N4, and phosphorus and oxygen co-doped C3N4, respectively. By taking advantage of the cascade mode in photocatalysis-self-Fenton reaction, H2O2 utilization efficiency was remarkably improved to 77.7%, about 9.0 times higher than that of traditional homogeneous Fenton reaction. Befitting from the superior yield and utilization efficiency, the degradation performance of P-C3N4/O-C(3)N(4)was undoubtedly superior than other photocatalysts. This work well addressed two bottlenecks in traditional Fenton reaction: source of H2O2 and their low utilization efficiency, and the findings were beneficial to understand the mechanism and advantage of the photocatalysis-self-Fenton system in environmental remediation. (C) 2021 Elsevier Inc. All rights reserved.
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