摘要
采用水热法制备AuCu双金属纳米颗粒,并用X射线衍射(XRD)、透射电镜(TEM)和紫外可见光谱(UV-Vis)进行表征,初步研究了其对4-硝基苯酚(4-NP)还原的催化性能和光热效应。结果表明,制备时不同的AuCl^4-/Cu^2+摩尔比(rAu)可以调控AuCu双金属纳米颗粒的组分和形貌,XRD和吸收光谱特征随rAu的增加表现出更明显的金的特征,rAu>0.5时得到的颗粒具有典型的核-壳结构;核-壳结构的AuCu双金属纳米颗粒对4-NP还原表现出更好的催化活性,受光热效应影响,532 nm激光照射能够加强催化活性;在激光辐射作用下,不同AuCu双金属纳米颗粒具有相似的光热效应。
AuCu bimetallic nanoparticles were prepared by hydrothermal method and characterized by X-ray diffraction(XRD),transmission electron microscopy(TEM)and ultraviolet-visible spectroscopy(UV-Vis).The photothermal effect and catalytic activity for 4-nitrophenol(4-NP)reduction were studied.The results show that the composition and morphology of AuCu bimetallic nanoparticles can be tuned by changing AuCl^4-/Cu^2+molar ratios(rAu)during preparation.The XRD and UV-Vis spectra show the evident characteristics of gold component were observed with the increase of rAu.When the rAu is>0.5,the particles have a typical core-shell structure.The core-shell AuCu bimetallic nanoparticles exhibit better catalytic activity for the reduction of 4-NP,and their catalytic activity can be enhanced by 532 nm laser irradiation because of the photothermal effect.In addition,different AuCu bimetallic nanoparticles have similar photothermal effects.
作者
毛远洋
贾会敏
何伟伟
MAO Yuan-yang;JIA Hui-min;HE Wei-wei(Key Laboratory of Micro-Nano Materials for Energy Storage and Conversion of Henan Province,College of Advanced Material and Energy,Institute of Surface Micro and Nano Materials,Xuchang University,Xuchang 461000,Henan,China)
出处
《贵金属》
CAS
CSCD
北大核心
2020年第1期25-30,共6页
Precious Metals
基金
国家自然科学基金(51772256),河南省高校科技创新团队支持计划(19IRTSTHN026)。
关键词
AuCu双金属纳米颗粒
水热法
核-壳结构
催化活性
光热效应
AuCu bimetallic nanoparticles
hydrothermal method
core-shell structure
catalytic activity
photothermal effect
