NWIPB OpenIR
Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix
Wang, Rong1; Zhang, Wentao1; Zhu, Wenxin1; Yan, Lingzhi1; Li, Sihang1; Chen, Kai1; Hu, Na2; Suo, Yourui2; Wang, Jianlong1
2018-09-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume348Pages:292-300
SubtypeArticle
AbstractDefect WO3-carbon hybrid nanosheets (D-WO3@C), synthesized by a facile hydrothermal method, is utilized as an effective visible-light driven photocatalyst for sustainable inactivation of bacteria. Detailed characterization through SEM-EDS, XRD, FT-IR, HRTEM, and XPS confirmed the formation of the nanohybrids. As a result, the as-synthesized D-WO3@C exhibited the best sterilization efficiency among all of the WO3 photocatalysts, and 7 log inactivation of E. coli or S. aureus was obtained after treating samples for 45 min with 1000 mu g/mL D-WO3@C. It was found that D-WO3@C exhibited enhanced visible-light-driven photocatalytic sterilization in killing bacteria compared with D-WO3 and P-WO3. The results show that the oxygen vacancies and carbon matrix were able to promote photocatalytic performance by triggering a faster interfacial transfer and a higher efficient separation of electron-hole pairs, which most likely is the reason behind the improved bactericidal effect. Furthermore, fluorescent-based cell viability/death tests and SEM technology were employed to demonstrate the lethal effect as well as the integrity of bacterial membranes during photocatalytic process. Photoelectrochemical techniques and UV-visible diffuse reflectance revealed the efficient separation of electron-hole pairs between D-WO3 and carbon matrix. More importantly, after being tested in four cycles, D-WO3@C showed good photocatalytic performance due to its chemical stability. The excellent properties associated with the novel D-WO3/C indicated that they could be considered as a promising light-visible driven photocatalyst to remove, in practice, microbial contamination of water.
KeywordWo3 Oxygen Vacancies Carbon Matrix Sterilization Photocatalyst
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2018.05.010
WOS KeywordGRAPHENE OXIDE ; HIERARCHICAL NANOSTRUCTURES ; WATER-PURIFICATION ; WO3 NANOSHEETS ; NANOPARTICLES ; DISINFECTION ; TIO2 ; PERFORMANCE ; FABRICATION ; COMPOSITES
Indexed BySCI
Language英语
Funding OrganizationNational Natural Science Foundation of China(21675127) ; Development Project of Qinghai Key Laboratory(2017-ZJ-Y10)
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000434467000029
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://210.75.249.4/handle/363003/13809
Collection中国科学院西北高原生物研究所
Corresponding AuthorWang, Jianlong
Affiliation1.Northwest A&F Univ, Coll Food Sci & Engn, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Key Lab Qinghai Tibet Plateau Biol Resour, Xining 810008, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Wang, Rong,Zhang, Wentao,Zhu, Wenxin,et al. Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix[J]. CHEMICAL ENGINEERING JOURNAL,2018,348:292-300.
APA Wang, Rong.,Zhang, Wentao.,Zhu, Wenxin.,Yan, Lingzhi.,Li, Sihang.,...&Wang, Jianlong.(2018).Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix.CHEMICAL ENGINEERING JOURNAL,348,292-300.
MLA Wang, Rong,et al."Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix".CHEMICAL ENGINEERING JOURNAL 348(2018):292-300.
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