花状Ag/ZnO微纳米结构:简单的合成和多功能应用（英文）

Ag-Strewn ZnO Flowerlike Microstructures: Simple Synthesis and Versatile Applications

设计了一条两步路线成功合成了Ag纳米粒子点缀的ZnO花状微结构(Ag/ZnO).首先以六水合硝酸锌、尿素和L-半胱氨酸为反应原料,100°C下水热反应8h,合成出花状碱式碳酸锌前驱体,并经空气中高温煅烧得到多孔ZnO花状微结构;然后,通过光还原硝酸银得到了Ag/ZnO花状微结构.所得产物用X-射线衍射仪、扫描电子显微镜、透射电子显微镜、热重分析仪、红外光谱、紫外-可见漫反射光谱和荧光光谱等进行系统的表征.研究显示,所得的Ag/ZnO花状微结构在光催化、灭菌和电催化等领域都具有很好的应用.

In this paper, Ag nanoparticles-strewn ZnO flowerlike microstructures were successfully synthesized via a two - step route. Porous ZnO flowerlike microstructures were firstly prepared by a simple hydrothermal process with subsequent calcination, employing Zn （NO3）2 and urea as the starting reactants in the presence of L-Cysteine; Then, Ag nanoparticles-strewn ZnO flowerlike microstructures were obtained through a photoreduction method. The as-synthesized products were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, （high resolution） transmission electron microscopy （HRTEM/TEM）, selected area electron diffraction （SAED）, thermogravimetric analysis （TGA）, Fourier transform infrared （FT-IR） spectra, UV-vis diffuse reflectance spectra （DRS） and photoluminescence spectra （PL）. Experiments showed that the Ag nanoparticles-strewn ZnO flowerlike microstructures exhibited versatile applications in some fields including excellent catalytic capacities for the degradation of Rhodamine B （RhB） and methyl orange （MO）, highly effective antimicrobial activities toward Escherichia coli and high electrocatalysis performance to hydrogen peroxide.