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

NWIPB OpenIR

	Enhanced visible-light-driven photocatalytic sterilization of tungsten trioxide by surface-engineering oxygen vacancy and carbon matrix
	Wang, Rong ; Zhang, Wentao ; Zhu, Wenxin ; Yan, Lingzhi ; Li, Sihang ; Chen, Kai ; Hu, Na ; Suo, Yourui ; Wang, Jianlong
	2018-09-15
发表期刊	CHEMICAL ENGINEERING JOURNAL
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.
出版者	ELSEVIER SCIENCE SA
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/59646
专题	中国科学院西北高原生物研究所
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.
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.
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 (2018).