Plasmon enhanced photocatalytic and antimicrobial activities of Ag-TiO2 nanocomposites under visible light irradiation prepared by DBD cold plasma treatment

Peimei Dong; Fangfang Yang; Xudong Cheng; Zhengfeng Huang; Xiaoxiao Nie; Yonghong Xiao; Xiwen Zhang

doi:10.1016/j.msec.2018.11.005

Plasmon enhanced photocatalytic and antimicrobial activities of Ag-TiO₂ nanocomposites under visible light irradiation prepared by DBD cold plasma treatment

Mater Sci Eng C Mater Biol Appl. 2019 Mar:96:197-204. doi: 10.1016/j.msec.2018.11.005. Epub 2018 Nov 7.

Authors

Peimei Dong¹, Fangfang Yang², Xudong Cheng¹, Zhengfeng Huang¹, Xiaoxiao Nie¹, Yonghong Xiao³, Xiwen Zhang⁴

Affiliations

¹ State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
² School of Pharmaceutical Biotechnology, Zhejiang University, Hangzhou 310027, China.
³ State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital of Medical College, Zhejiang University, 310003, China.
⁴ State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China. Electronic address: zhangxw@zju.edu.cn.

PMID: 30606525
DOI: 10.1016/j.msec.2018.11.005

Abstract

Silver nanoparticles (Ag NPs) have been deposited on powder P25 by a novel two-step method involving a precipitation reaction and atmospheric pressure dielectric barrier discharge (DBD) cold plasma treatment without the use of any environmentally and biologically hazardous reducing agents. The silver precursor is formed in the processing of precipitation reaction and then completely reduced to the metallic state by atmospheric pressure DBD cold plasma treatment as proved by X-ray photoelectron spectroscopy, UV-Visible absorption spectra and HRTEM analyses. TEM images indicate that the Ag NPs with average diameter of 3.7 nm were deposited on powder P25 with high dispersion although no reducing agents, stabilizers or surfactants were used. The prepared products show remarkable improvement for methylene blue (MB) photodegradation and effective inhibition of bacterias against Escherichia coli and Staphylococcus aureus.

Keywords: Ag nanoparticles; Antibacterial; Cold plasma; Photocatalysis; TiO(2).

MeSH terms

Anti-Infective Agents* / chemistry
Anti-Infective Agents* / pharmacology
Catalysis
Escherichia coli / growth & development*
Light*
Nanocomposites / chemistry*
Photochemical Processes*
Plasma Gases / chemistry*
Silver* / chemistry
Silver* / pharmacology
Staphylococcus aureus / growth & development*
Titanium* / chemistry
Titanium* / pharmacology

Substances

Anti-Infective Agents
Plasma Gases
titanium dioxide
Silver
Titanium