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The role of ozone and influence of band structure in WO3 photocatalysis and ozone integrated process for pharmaceutical wastewater treatment
Yang, Jin1,2; Xiao, Jiadong1,3; Cao, Hongbin1,2; Guo, Zhuang1,2; Rabeah, Jabor4; Brueckner, Angelika4; Xie, Yongbing1
2018-10-15
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
ISSN0304-3894
Volume360Pages:481-489
Abstract

Photocatalytic ozonation has great potential in wastewater treatment. However, the role of ozone and the contribution of photogenerated hole in this process have not been fully understood. Here three WO3 materials are synthesized and used as model catalysts in visible-light photocatalytic ozonation for the mineralization of pharmaceutical pollutants. A dual role of ozone in this process has been confirmed: (i) direct oxidation of the pollutant till formation of refractory intermediates, (ii) efficient trapping of photoelectron that cannot be captured by O-2. The latter is crucial because it not only induces the center dot O-3(-)-mediated pathway for hydroxyl radical (center dot OH) formation but also separates the hole which has proven to be capable of oxidizing water into center dot OH. Evidenced by photoluminescence results, the intrinsic charge separation ability of WO3 in photocatalytic ozonation is no more as important as that in photocatalysis with O-2. Finally, this process is more applicable under acidic condition. This work contributes to a better understanding of the significance of ozone in WO3 photo catalytic ozonation and provides us an insight into the mechanism of photocatalytic ozonation.

KeywordWo3 Photocatalytic Ozonation Band Structure Cephalexin
DOI10.1016/j.jhazmat.2018.08.033
Language英语
WOS KeywordVisible-light Irradiation ; Super Synergy ; Ozonation ; Degradation ; Oxidation ; Kinetics ; G-c3n4 ; Sulfamethoxazole ; Pollutants ; Mechanism
Funding ProjectBeijing Natural Science Foundation[8172043] ; Major Science and Technology Program for Water Pollution Control and Treatment[2015ZX07202013] ; National Science Fund for Distinguished Young Scholars of China[51425405]
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Funding OrganizationBeijing Natural Science Foundation ; Major Science and Technology Program for Water Pollution Control and Treatment ; National Science Fund for Distinguished Young Scholars of China
WOS IDWOS:000446144600053
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/26093
Collection中国科学院过程工程研究所
Corresponding AuthorXie, Yongbing
Affiliation1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing Engn Res Ctr Proc Pollut Control, Beijing 100190, Peoples R China
2.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Rostock, Leibniz Inst Catalysis, Albert Einstein Str 29a, D-18059 Rostock, Germany
Recommended Citation
GB/T 7714
Yang, Jin,Xiao, Jiadong,Cao, Hongbin,et al. The role of ozone and influence of band structure in WO3 photocatalysis and ozone integrated process for pharmaceutical wastewater treatment[J]. JOURNAL OF HAZARDOUS MATERIALS,2018,360:481-489.
APA Yang, Jin.,Xiao, Jiadong.,Cao, Hongbin.,Guo, Zhuang.,Rabeah, Jabor.,...&Xie, Yongbing.(2018).The role of ozone and influence of band structure in WO3 photocatalysis and ozone integrated process for pharmaceutical wastewater treatment.JOURNAL OF HAZARDOUS MATERIALS,360,481-489.
MLA Yang, Jin,et al."The role of ozone and influence of band structure in WO3 photocatalysis and ozone integrated process for pharmaceutical wastewater treatment".JOURNAL OF HAZARDOUS MATERIALS 360(2018):481-489.
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