Cryptomelane nanowires for highly selective self-heating photothermal synergistic catalytic oxidation of gaseous ammonia
文献类型： 外文期刊
作者： Zhou, Yu 1 ; Feng, Yanfang 2 ; Xie, Huifang 1 ; Lu, Jingling 1 ; Ding, Danni 1 ; Rong, Shaopeng 1 ;
作者机构： 1.Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Jiangsu Key Lab Chem Pollut Control & Resources Re, Nanjing 210094, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Key Lab Agro Environm Downstream Yangtze Plain, Key Lab Integrated Planting & Breeding,Minist Agr, Nanjing 210014, Peoples R China
关键词： Photothermal catalysis; Thermalcatalysis; Cryptomelane; Mechanism; Ammonia
期刊名称：APPLIED CATALYSIS B-ENVIRONMENTAL （ 影响因子：22.1； 五年影响因子：19.7 ）
ISSN： 0926-3373
年卷期： 2023 年 331 卷
页码：
收录情况： SCI
摘要： Photothermal selective catalytic oxidation of NH3 (NH3-SCO) provided a cost-effective approach to controling NH3 pollution. However, the contribution of photocatalysis and thermalcatalysis in photothermal NH3-SCO, as well as the synergistic mechanism was not well addressed. Herein, the cryptomelane nanowires were developed for self-heating photothermal NH3-SCO, and excellent NH3 conversion (91.7%) and N2 selectivity (94.7%) were achieved. Furthermore, the study of the synergistic mechanism showed that the photothermal NH3-SCO can be attributed to the thermal-assisted photocatalytic mechanism, which is the synergy of photocatalysis and pho-tothermal effect. Moreover, the reaction paths of photothermal and thermal NH3-SCO were comparative studied. For the photothermal NH3-SCO, it is considered to follow the photo-iSCR mechanism, in which the activation of NH3 into & BULL;NH2 by photogenerated holes serves a key role; while the thermalcatalysis is mainly dominated by the iSCR mechanism and supplemented by the imide mechanism. This research provides fundamental insights into the photothermal NH3-SCO mechanism.
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