Hydroxyl radical and carbonate radical facilitate chlortetracycline degradation in the bio-photoelectrochemical system with a bioanode and a Bi_2O_3/CuO photocathode using bicarbonate buffer

Chen Shuo; Hou Yanping; Rong YiyuanTu LingliYu ZebinSun JiangliLan DanquanLi ZujiZhu HongxiangWang Shuangfei

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Hydroxyl radical and carbonate radical facilitate chlortetracycline degradation in the bio-photoelectrochemical system with a bioanode and a Bi_2O_3/CuO photocathode using bicarbonate buffer

机译：Hydroxyl radical and carbonate radical facilitate chlortetracycline degradation in the bio-photoelectrochemical system with a bioanode and a Bi_2O_3/CuO photocathode using bicarbonate buffer

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The single-chamber bio-photoelectrochemical system (BPES) with a bioanode and a Bi2O3/CuO photocathode is developed for chlortetracycline (CTC) degradation under simulated solar irradiation, using phosphate buffer solution (PBS) or NaHCO3 as buffer solution. The optimized Bi2O3/CuO photocathode possesses rich vacancies, great photoresponse capability, and exhibits great photocatalytic activity toward CTC degradation due to its Z scheme structure. Electron spin-resonance spectroscopy (ESR) and reactive species trapping experiments reveal that superoxide radicals/hydroxyl radicals are both the main radicals contributing to CTC degradation. Moreover, carbonate radical plays a more effective role toward CTC degradation, resulting in 40 improvement for CTC degradation in the BPES within 2 h. Higher current density (maximum of 137.6 A m(-2)) and more negative cathode potential are obtained from the illuminated BPES with NaHCO3 buffer. Possible mechanism and pathways of CTC degradation are proposed. This study contributes to the development of BPESs for antibiotics degradation.

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来源
《Chemosphere》 |2022年第6期|134040.1-134040.10|共10页
作者
Chen Shuo; Hou Yanping; Rong YiyuanTu LingliYu ZebinSun JiangliLan DanquanLi ZujiZhu HongxiangWang Shuangfei;
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作者单位

Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China;

Guangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China|MOE Key Lab New Proc Technol Nonferrous Met & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R China|Guangxi Bossco Environm Protect Technol Co Lt;

Guangxi Open Univ, Sch Arts & Sci, Nanning 530022, Peoples R ChinaGuangxi Univ, Sch Resources Environm & Mat, Nanning 530004, Peoples R China|MOE Key Lab New Proc Technol Nonferrous Met & Mat, Guangxi Key Lab Proc Nonferrous Met & Featured Ma, Nanning 530004, Peoples R ChinaGuangxi Bossco Environm Protect Technol Co Ltd, Natl Enterprise Technol Ctr, Nanning 530007, Peoples R China|Guangxi Univ, Coll Light Ind & Food Engn, Nanning 530004, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类
关键词
Bio-photoelectrochemical system; Chlortetracycline degradation; Buffer solution; Current density; Z-scheme Bi2O3/CuO photocathode;

Hydroxyl radical and carbonate radical facilitate chlortetracycline degradation in the bio-photoelectrochemical system with a bioanode and a Bi_2O_3/CuO photocathode using bicarbonate buffer

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