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作者:

Li, Zhaonian (Li, Zhaonian.) | Li, Daorong (Li, Daorong.) | Feng, Zhanzhao (Feng, Zhanzhao.) | Lv, Shuqi (Lv, Shuqi.) | Zhang, Qingxuan (Zhang, Qingxuan.) | Yu, Yanru (Yu, Yanru.) | Tian, Ying (Tian, Ying.) | Huang, Runfeng (Huang, Runfeng.) | Chen, Hongxia (Chen, Hongxia.) | Zhang, Kunfeng (Zhang, Kunfeng.) | Dai, Hongxing (Dai, Hongxing.)

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EI Scopus

摘要:

WO3 nanorods and xWO3@TiO2 (WO3/TiO2 mass ratio (x) = 1−5) photocatalysts were synthesized using the hydrothermal and sol-gel methods, respectively. The photocatalytic activities of xWO3@TiO2 for NH3 oxidation first increased and then decreased with a rise in TiO2 content. Among them, the heterostructured 3WO3@TiO2 photocatalyst showed the highest NH3 conversion (58 %) under the simulated sunlight irradiation, which was about two times higher than those of WO3 and TiO2. Furthermore, the smallest amounts of by-products (i.e., NO and NO2) were produced over 3WO3@TiO2. The enhancement in photocatalytic performance (i.e., NH3 conversion and N2 selectivity) of 3WO3@TiO2 was mainly attributed to the formed interfacial electric field between WO3 and TiO2, which promoted efficient separation and transfer of photogenerated charge carriers. Based on the results of reactive species trapping and active radical detection, photocatalytic oxidation of NH3 over 3WO3@TiO2 was governed by the photogenerated holes and superoxide radicals. This work combines two strategies of morphological regulation and interfacial electric field construction to simultaneously improve light utilization and photogenerated charge separation efficiency, which promotes the development of full-spectrum photocatalysts for the removal of ammonia. © 2024 Elsevier Ltd

关键词:

Oxidation Titanium dioxide TiO2 nanoparticles Sol-gels Sol-gel process Electric fields Ammonia Photocatalytic activity Nanorods Tungsten compounds

作者机构:

  • [ 1 ] [Li, Zhaonian]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 2 ] [Li, Daorong]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 3 ] [Feng, Zhanzhao]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 4 ] [Lv, Shuqi]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 5 ] [Zhang, Qingxuan]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 6 ] [Yu, Yanru]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 7 ] [Tian, Ying]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 8 ] [Huang, Runfeng]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 9 ] [Chen, Hongxia]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 10 ] [Zhang, Kunfeng]College of Environmental Engineering, Henan University of Technology, Henan, Zhengzhou; 450001, China
  • [ 11 ] [Dai, Hongxing]Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Advanced Functional Materials, Ministry of Education, Department of Chemical Engineering and Technology, College of Materials Science and Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 12 ] [Dai, Hongxing]Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental Science and Engineering, Beijing University of Technology, Beijing; 100124, China

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来源 :

Chemosphere

ISSN: 0045-6535

年份: 2024

卷: 355

8 . 8 0 0

JCR@2022

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