Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix

doi:10.1016/j.cej.2018.05.010

NWIPB OpenIR

	Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix
	Wang, Rong 1; Zhang, Wentao 1; Zhu, Wenxin 1; Yan, Lingzhi 1; Li, Sihang 1; Chen, Kai 1; Hu, Na 2; Suo, Yourui2 ; Wang, Jianlong 1
	2018-09-15
发表期刊	CHEMICAL ENGINEERING JOURNAL
ISSN	1385-8947
卷号	348 页码:292-300
文章类型	Article
摘要	Defect 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.
关键词	Wo3 Oxygen Vacancies Carbon Matrix Sterilization Photocatalyst
WOS标题词	Science & Technology ; Technology
DOI	10.1016/j.cej.2018.05.010
关键词[WOS]	GRAPHENE OXIDE ; HIERARCHICAL NANOSTRUCTURES ; WATER-PURIFICATION ; WO3 NANOSHEETS ; NANOPARTICLES ; DISINFECTION ; TIO2 ; PERFORMANCE ; FABRICATION ; COMPOSITES
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(21675127) ; Development Project of Qinghai Key Laboratory(2017-ZJ-Y10)
WOS研究方向	Engineering
WOS类目	Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:000434467000029
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：64[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/13809
专题	中国科学院西北高原生物研究所
通讯作者	Wang, Jianlong
作者单位	1.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
推荐引用方式 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.