摘要
为了扩大纳米TiO2在可见光范围的吸收,进行在纳米TiO2中掺入Ag实验。以工业级偏钛酸、硝酸银为主要实验原料,采用一种简易的方法制备出Ag/TiO2纳米粒子,并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电镜(TEM)、X射线光电子能谱(XPS)、紫外-可见光吸收光谱(UV-vis)对该粒子进行表征。结果表明,二氧化钛以锐钛型晶型,银以单质的形式存在于纳米复合粒子中;Ag的结合能367.476 eV(3d3/2)与373.453 eV(3d5/2)分别比纯银的结合能368.4 eV(3d3/2)与374.4 eV(3d5/2)低,这是由于制备Ag/TiO2时煅烧温度较纯银高,银簇生长较大引起的;并显示复合粒子的粒径约为30 nm;Ag/TiO2纳米粒子感应波长明显红移,增强了纳米TiO2在可见光范围内的吸收。
In order to enlarge the Absorbed intensity of nano-TiO2 in visible light,Ag/TiO2 nanoparticles were prepared mainly from industrial H2TiO3 and AgNO3 by a simple method.It was characterized by X-ray powder diffraction(XRD),scanning electron microscope(SEM),transmission electron microscope(TEM),X-ray photoelectron spectroscopy(XPS) and UV-vis.XRD patterns showed that TiO2 existed as anatase and silver existed as elemental form in nano-composite particles.XPS results showed that the binding energies of silver ...
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2009年第6期137-140,共4页
Journal of Sichuan University (Engineering Science Edition)
基金
横向研究资助项目(08H0377)
关键词
二氧化钛
银
纳米粒子
表征
Titanium dioxide
silver
nanoparticles
characterization
