Uniform Zn2+-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO | |
Rao, Fei1; Zhu, Gangqiang1; Hojamberdiev, Mirabbos2; Zhang, Weibin3; Li, Shiping1; Gao, Jianzhi1; Zhang, Fuchun4; Huang, Yuhong1; Huang, Yu5 | |
通讯作者 | Zhu, Gangqiang(zgq2006@snnu.edu.cn) |
2019-07-04 | |
发表期刊 | JOURNAL OF PHYSICAL CHEMISTRY C |
ISSN | 1932-7447 |
卷号 | 123期号:26页码:16268-16280 |
摘要 | Highly exposed active facets and surface oxygen vacancies (OVs) are beneficial for the photocatalytic removal of various harmful organic compounds. In this study, uniform Zn2+ -doped BiOI microspheres, assembled by ultrathin nanosheets with highly exposed {001} facets, with OVs were successfully synthesized for NO removal under visible light irradiation. The phase structure and chemical states are analyzed by means of X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The transmission electron microscopy observations reveal that replacing Bi3+ with Zn2+ can lead to the increased exposure of the {001} facets. X-ray photoelectron and electron paramagnetic resonance spectroscopy results confirm that low-state Zn2+ increases the number of OVs, indicating that an increased number of OVs and a reduced thickness of the nanosheets can enhance the photocatalytic activity for the removal of NO. The photo-oxidative removal efficiency of NO over 3%Zn-BiOI reaches 53.6% and remains highly stable (52.9%) for up to 210 min under visible light irradiation. The calculation of interface adsorption confirms that OVs and Zn2+ can not only offer a donor energy level to extend the solar response range but also act as adsorption sites for low concentration of NO and O-2 to optimize the transmission capacity of surface charge carriers. Moreover, this work systematically explains the function of OVs and Zn2+ in the adsorption process of NO. The in situ Fourier transform infrared spectroscopy supports understanding of the photo-oxidative removal mechanisms of NO over Zn-BiOI: (i) the byproducts were bidentate nitrites (bi-NO2-), chelate nitrites (ch-NO2-), and bridging nitrites (br-NO3-) in the dark condition and (ii) the final products were bridging nitrites and bidentate nitrites (bi-NO3-) under visible light irradiation. OVs are found to play an important role both in the dark adsorption and photo-oxidative removal of NO by the 3%Zn-BiOI sample. |
DOI | 10.1021/acs.jpcc.9b03961 |
关键词[WOS] | SELECTIVE CATALYTIC-REDUCTION ; VISIBLE-LIGHT PHOTOCATALYSIS ; ROOM-TEMPERATURE SYNTHESIS ; CHARGE-TRANSFER ; OXIDATION ; DEGRADATION ; ADSORPTION ; MECHANISM ; METAL ; PERFORMANCE |
收录类别 | SCI ; SCI |
语种 | 英语 |
资助项目 | National Natural Science Foundation of China[51772183] ; National Natural Science Foundation of China[11847058] ; Key Research and Development Program of Shaanxi Province[2018ZDCXL-SF-02-04] ; Fundamental Research Funds for the Central Universities[GK201903023] ; Fundamental Research Funds for the Central Universities[GK201801005] ; Alexander von Humboldt (AvH) Stiftung |
WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
项目资助者 | National Natural Science Foundation of China ; Key Research and Development Program of Shaanxi Province ; Fundamental Research Funds for the Central Universities ; Alexander von Humboldt (AvH) Stiftung |
WOS类目 | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
WOS记录号 | WOS:000474796600040 |
出版者 | AMER CHEMICAL SOC |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/13766 |
专题 | 粉尘与环境研究室 |
通讯作者 | Zhu, Gangqiang |
作者单位 | 1.Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Shaanxi, Peoples R China 2.Tech Univ Berlin, Inst Werkstoffwissensch & Technologien, Chair Adv Ceram Mat, Fachgebiet Keram Werkstoffe, Hardenbergstr 40, D-10623 Berlin, Germany 3.Yangtze Univ, Sch Phys & Optoelect Engn, Jingzhou 434023, Peoples R China 4.Yanan Univ, Coll Phys & Elect Informat, Yanan 716000, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China |
推荐引用方式 GB/T 7714 | Rao, Fei,Zhu, Gangqiang,Hojamberdiev, Mirabbos,et al. Uniform Zn2+-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2019,123(26):16268-16280. |
APA | Rao, Fei.,Zhu, Gangqiang.,Hojamberdiev, Mirabbos.,Zhang, Weibin.,Li, Shiping.,...&Huang, Yu.(2019).Uniform Zn2+-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO.JOURNAL OF PHYSICAL CHEMISTRY C,123(26),16268-16280. |
MLA | Rao, Fei,et al."Uniform Zn2+-Doped BiOI Microspheres Assembled by Ultrathin Nanosheets with Tunable Oxygen Vacancies for Super-Stable Removal of NO".JOURNAL OF PHYSICAL CHEMISTRY C 123.26(2019):16268-16280. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论