Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 245, Issue -, Pages 220-226Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2018.12.067
Keywords
Photocatalysis; Pollutant elimination; Volatile-aromatic compounds; TaON/V2O5 heterojunction
Funding
- National Natural Science Foundation of China [51872135, 51572121, 21603098, 21633004, 11504162, 21876015]
- Natural Science Foundation of Jiangsu Province [BK20151265, BK20150580, BK20161277]
- Natural Science Foundation of Jiangsu Education Department [16KJB610002]
- Postdoctoral Science Foundation of China [2017M611784]
- Fundamental Research Funds for the Central Universities [021314380133, 021314380084]
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Efficiently separating carriers is the major challenge for degrading stable volatile-aromatic compounds by photocatalysis. Here, we propose using TaON to modify V2O5 to construct heterojunction for improving the charge separation efficiency. The 5 wt% TaON/V2O5 exhibited the optimal photocatalytic activity in degradation of toluene, reaching to 40% mineralization ratio after 30 h irradiation, which was 2.1 and 1.5 times higher than TaON and V2O5, respectively. The enhanced photocatalytic activity was mainly ascribed to the improved separation efficiency of carriers by the interface electric field of heterojunction. The mass spectrum and electron paramagnetic resonance analyses distinctly demonstrated that the toluene was first oxidized by OH to generate cyclohexane-1,2,3,4,5,6-hexaol. Then, it reacted with 'OH, O2 and h+ to change into xylose and methoxyacetaldehyde until they were mineralized to CO2.
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