Singlet Oxygen and Mobile Hydroxyl Radicals Co-operating on Gas-Solid Catalytic Reaction Interfaces for Deeply Oxidizing NOx

Li Qian; Zhao Jingjing; Shang HuanMa ZhongCao HaiyanZhou YueLi GuishengZhang DieqingLi Hexing

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Singlet Oxygen and Mobile Hydroxyl Radicals Co-operating on Gas-Solid Catalytic Reaction Interfaces for Deeply Oxidizing NOx

机译：Singlet Oxygen and Mobile Hydroxyl Radicals Co-operating on Gas-Solid Catalytic Reaction Interfaces for Deeply Oxidizing NOx

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Learning from the important role of porphyrin-based chromophores in natural photosynthesis, a bionic photocatalytic system based on tetrakis (4-carboxyphenyl) porphyrin-coupled TiO2 was designed for photo-induced treating low-concentration NOx indoor gas (550 parts per billion), achieving a high NO removal rate of 91% and a long stability under visible-light (lambda >= 420 nm) irradiation. Besides the great contribution of the conventional O-center dot(2)- reactive species, a synergic effect between a singlet oxygen ((OHf)-O-center dot) and mobile hydroxyl radicals MHO was first illustrated for removing NOx indoor gas (O-1(2) + 2NO -> 2NO(2), NO2 + (OHf)-O-center dot -> HNO3), inhibiting the production of the byproducts of NO2. This work is helpful for understanding the surface mechanism of photocatalytic NOx oxidation and provides a new perspective for the development of highly efficient air purification systems.

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《Environmental Science & Technology: ES&T》 |2022年第9期|5830-5839|共10页
作者
Li Qian; Zhao Jingjing; Shang HuanMa ZhongCao HaiyanZhou YueLi GuishengZhang DieqingLi Hexing;
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作者单位

Shanghai Normal Univ;

Shanghai Normal Univ;

Cent China Normal UnivUniv WaterlooUniv Waterloo;

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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
NOx; oxidation; singlet oxygen; hydroxyl radicals; synergistic effect; photocatalysis; PHOTOCATALYTIC HYDROGEN-PRODUCTION; SELECTIVE PHOTOOXIDATION; HIGHLY EFFICIENT; NITRIC-OXIDE; REMOVAL; MECHANISMS; OXIDATION; AIR; PURIFICATION; ACTIVATION;

Singlet Oxygen and Mobile Hydroxyl Radicals Co-operating on Gas-Solid Catalytic Reaction Interfaces for Deeply Oxidizing NOx

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