Dual metal ions/BNQDs boost PMS activation over copper tungstate photocatalyst for antibiotic removal: Intermediate, toxicity assessment and mechanism

被引：78

作者：

Chen, Ruyao ^{[1
]}

Zhang, Haiyue ^{[1
]}

Dong, Yuming ^{[2
]}

Shi, Haifeng ^{[1
,3
]}

机构：

[1] Jiangnan Univ, Sch Sci, Wuxi 214122, Peoples R China

[2] Jiangnan Univ, Key Lab Synthet & Biol Colloids, Minist Educ, Wuxi 214122, Peoples R China

[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2024年 / 170卷

基金：

中国国家自然科学基金;

关键词：

Dual redox cycles; Photocatalysis; Peroxymonosulfate; BN quantum dots; Toxicity assessment; NITRIDE QUANTUM DOTS; ZERO-VALENT IRON; PEROXYMONOSULFATE ACTIVATION; LOW-TEMPERATURE; DEGRADATION; CUWO4; HETEROJUNCTION; PHOTOANODES; PERFORMANCE; OXIDATION;

D O I：

10.1016/j.jmst.2023.07.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the metal-based peroxymonosulfate (PMS) activation process, the sluggish surface redox cycle of metal ions generally hampered the efficiency of PMS activation for pollutant removal. Herein, Codoped CuWO 4 /BN quantum dots (CW/Co/BNQDs) photocatalysts were developed to realize Cu 2 + /Cu + and Co 2 + /Co 3 + dual ions redox cycles for PMS activation, which would facilitate the tetracycline (TC) removal. CW/4Co/2BNQDs could degrade 94.8% TC within 30 min in PMS/Vis system, and the apparent rate constant of CW/4Co/2BNQDs was 2.7 times and 1.2 times higher than those of CW and CW/4Co, respectively. The improved TC degradation performance could be attributed to the synergetic effect between BNQDs and dual redox cycles. X-ray photoelectron spectroscopy (XPS) spectra of samples before and after the reaction demonstrated that BNQDs were beneficial for accelerating the Cu 2 + /Cu + and Co 2 + /Co 3 + redox cycles in CW/4Co/2BNQDs, further boosting the activation of PMS in TC degradation. Experiments of different radical scavengers revealed that the SO 4 & BULL;-/ & BULL;OH/h + / 1 O 2 reactive species participated in the PMS activation for the TC degradation process. The possible TC degradation pathway and intermediate toxicity were detailed investigated. In addition, CW/4Co/2BNQDs exhibited outstanding photocatalytic activity over five consecutive cycles, which illustrated that it was supposed to be a reliable PMS activator over antibiotic elimination for practical application. And this work shed new light on constructing dual redox cycles for efficient PMS activation.& COPY; 2023 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

引用

页码：11 / 24

页数：14

共 72 条

[1] Evaluation of N-doped carbon for the peroxymonosulfate activation and removal of organic contaminants from livestock wastewater and groundwater [J].