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

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

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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,Co-doped CuWO4/BN quantum dots(CW/Co/BNQDs)photocatalysts were developed to realize Cu2+/Cu+and Co2+/Co3+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 con-stant 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 Cu2+/Cu+and Co2+/Co3+redox cycles in CW/4Co/2BNQDs,further boosting the activation of PMS in TC degradation.Experiments of dif-ferent radical scavengers revealed that the SO4-/OH/h+/1O2 reactive species participated in the PMS activation for the TC degradation process.The possible TC degradation pathway and intermediate toxic-ity 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.

Dual redox cyclesPhotocatalysisPeroxymonosulfateBN quantum dotsToxicity assessment

Ruyao Chen、Haiyue Zhang、Yuming Dong、Haifeng Shi

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School of Science,Jiangnan University,Wuxi,214122,China

The Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,Jiangnan University,Wuxi,214122,China

National Laboratory of Solid State Microstructures,Nanjing University,Nanjing,210093,China

国家自然科学基金Special Fund Project of Jiangsu Province for Scientific and Technological Innovation in Carbon Peaking and Carbon Neutralityfoundation of Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,Jiangnan UniversityNational Laboratory of Solid State Microstructures,Nanjing University江苏省"青蓝工程"项目

22172064BK202200231042050205225990/009M34047

2024

10.1016/j.jmst.2023.07.005

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.170(3)
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