Generating oxygen vacancies in Cu 2+ -doped TiO 2 hollow spheres for enhanced photocatalytic activity and antimicrobial activity

Micro & nano letters

article

Hongguang Zhang¹  Meng Wang²  Feng Xu¹ 

[1] College of Pharmacy, Qiqihar Medical University;College of Adult and Continuing Education, Qiqihar Medical University

关键词: ultraviolet spectra;    microorganisms;    copper;    X-ray diffraction;    Raman spectra;    visible spectra;    titanium compounds;    antibacterial activity;    vacancies (crystal);    semiconductor growth;    semiconductor materials;    semiconductor doping;    photocatalysis;    crystal growth from solution;    hollow spheres;    photocatalytic activity;    antimicrobial activity;    visible-light activity;    oxygen vacancies;    environmental pollution treatment;    hydrothermal process;    X-ray powder diffraction;    Raman spectra;    degradation;    copper ion doping;    UV-Vis spectra;    gram-negative escherichia coli bacteria;    gram-positive staphylococcus aureus;    TiO2Cu2+;   

DOI  :  10.1049/mnl.2019.0781

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Developing cheap photocatalysts with highly visible-light activity is greatly desired for environmental pollution treatment. In this work, the authors designed and synthesised Cu 2+ -doped TiO 2 (Cu-TiO 2 ) hollow spheres with enhanced photocatalytic activity and antimicrobial activity using a simple hydrothermal process. The X-ray powder diffraction (XRD) results revealed that Cu-TiO 2 hollow spheres were anatase crystal phase. The Cu 2+ -doped into TiO 2 can be confirmed by XRD, Raman spectra, and UV–Vis spectrum. The photocatalytic activity of Cu-TiO 2 samples was evaluated by the degradation of methyl orange. Comparing to the undoped TiO 2 , 6% Cu-TiO 2 sample exhibited remarkably high photocatalytic towards methyl orange under simulated sunlight irradiation, which was attributed to the fact that copper ion doping produced numerous oxygen vacancies (V O ) in the material. In addition, it also showed improved antibacterial properties against both Gram-positive Staphylococcus aureus ( S.aureus ) and Gram-negative Escherichia coli ( E.coli ) bacteria. These results establish that Cu 2+ doping can obviously improve the photocatalytic performance of TiO 2 under simulated sunlight.

【 授权许可】

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