二氧化硅@裸银纳米颗粒微球制备及其对大肠杆菌活性的影响

Journal of Jilin University Science Edition ›› 2019, Vol. 57 ›› Issue (04): 985-988.

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Preparation of Silica@Bare Silver Nanoparticle Microspheresand Their Effects on Activity of Escherichia coli#br#

SHEN Qihui¹, SHAN Yixuan¹, LIU Man¹, LI Dongmei¹,LIU Yan¹, YU Dongdong², ZHOU Jianguang³#br#

1. Department of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, Jilin Province, China; 2. School Hospital of Zhejiang University, Hangzhou 310027, China; 3. Research Center for Analytical Instrumentation, Institute of CyberSystems and Control, State Key Laboratory of Industrial Control Technology, Zhejiang University, Hangzhou 310058, China

Received:2018-10-31 Online:2019-07-26 Published:2019-07-11
Contact: LIU Yan E-mail:liuyanjlu@126.com

Abstract

Abstract: The silica microspheres were used as carriers to absorb and reduce silver ions automatically on the surface of microspheres, and a new type of composite material of silica@silver nanoparticle microspheres (SiO₂@Ag NPs) was obtained. The silver nanoparticles were characterized by transmission electron microscopy (TEM), Raman spectroscopy and Xray photoelectron s
pectroscopy (XPS), and the bacteriostasis of Escherichia coli was tested. The results show that the antibacterial rate of the composite is 99.8% when the mass concentration of SiO2@Ag NPs is 2.0 mg/mL, and the antibacterial rate decreases when the surface of silver nanoparticles contains stabilizer (polyvinyl pyrrolidone). Therefore, the stabilizer can protect the monodispersity of silver nanoparticles, but it is not conducive to its bacteriostatic effect.

Key words: , silica, bare silver nanoparticle, antibacterial, Escherichia coli

CLC Number:

O614

SHEN Qihui, SHAN Yixuan, LIU Man, LI Dongmei, LIU Yan, YU Dongdong, ZHOU Jianguang. Preparation of Silica@Bare Silver Nanoparticle Microspheresand Their Effects on Activity of Escherichia coli#br#[J].Journal of Jilin University Science Edition, 2019, 57(04): 985-988.

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Preparation of Silica@Bare Silver Nanoparticle Microspheresand Their Effects on Activity of Escherichia coli#br#

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