Oxygen and Chlorine Dual Vacancies Enable Photocatalytic O-2 Dissociation into Monatomic Reactive Oxygen on BiOCl for Refractory Aromatic Pollutant Removal

Yang Zhiping; Shi Yanbiao; Li HaoMao ChengliangWang XiaobingLiu XiufanLiu XiaoZhang Lizhi

首页> 外文期刊>Environmental Science & Technology: ES&T >Oxygen and Chlorine Dual Vacancies Enable Photocatalytic O-2 Dissociation into Monatomic Reactive Oxygen on BiOCl for Refractory Aromatic Pollutant Removal

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Oxygen and Chlorine Dual Vacancies Enable Photocatalytic O-2 Dissociation into Monatomic Reactive Oxygen on BiOCl for Refractory Aromatic Pollutant Removal

机译：Oxygen and Chlorine Dual Vacancies Enable Photocatalytic O-2 Dissociation into Monatomic Reactive Oxygen on BiOCl for Refractory Aromatic Pollutant Removal

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Room-temperature molecular oxygen (O-2) dissociation is challenging toward chemical reactions due to its triplet ground-state and spin-forbidden characteristic. Herein, we demonstrate that BiOCl of oxygen and chlorine dual vacancies can photocatalytically dissociate O-2 into monatomic reactive oxygen (center dot O-) for the ring opening of aromatic refractory pollutants toward deep oxidation. The electron-rich and geometry-flexible dual vacancies of oxygen and chlorine remarkably lengthen the O-O bond of adsorbed O-2 from 1.21 to 2.74 angstrom, resulting in the rapid O-2 dissociation and the subsequent center dot O(- )formation. During the photocatalytic degradation of sulfamethazine, the in situ-formed center dot O- plays an indispensable role in breaking the critical intermediate of pyrimidine containing a stubborn aromatic heterocyclic ring, thus facilitating the overall mineralization. More importantly, BiOCI of oxygen and chlorine dual vacancies is also superior to its monovacancy counterparts on the degradation of other refractory pollutants containing conjugated six-membered rings, including p-chlorophenol, p-chloronitrobenzene, p-hydroxybenzoic acid, and p-nitrobenzoic acid. This study sheds light on the importance of sophisticated defects for regulating the O-2 activation manner and deliveries a novel O-2 activation approach for environmental remediation with solar energy.

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《Environmental Science & Technology: ES&T》 |2022年第6期|3587-3595|共9页
作者
Yang Zhiping; Shi Yanbiao; Li HaoMao ChengliangWang XiaobingLiu XiufanLiu XiaoZhang Lizhi;
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作者单位

Cent China Normal Univ;

Shanghai Jiao Tong Univ;

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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《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
dual anionic vacancies; O-2 dissociation; monatomic reactive oxygen; BiOCl; photocatalysis; MOLECULAR-OXYGEN; ACTIVATION; OXIDATION; GENERATION; BIOBR; GOLD;

Oxygen and Chlorine Dual Vacancies Enable Photocatalytic O-2 Dissociation into Monatomic Reactive Oxygen on BiOCl for Refractory Aromatic Pollutant Removal

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