刘淑玲，韩晓莉，仝建波

(1 陕西科技大学 教育部轻化工助剂化学与技术重点实验室，西安 710021;2 陕西科技大学 化学与化工学院，西安710021)

Ag/InP复合材料的制备、表征及其性能

刘淑玲1,2，韩晓莉1,2，仝建波1,2

(1 陕西科技大学 教育部轻化工助剂化学与技术重点实验室，西安 710021;2 陕西科技大学 化学与化工学院，西安710021)

通过溶剂热法制得磷化铟微晶，然后以光化学还原法成功将Ag单质均匀地复合到磷化铟微晶表面，制备Ag/InP复合材料。采用X射线衍射仪和扫描电子显微镜等对所得产物进行分析，结果表明：复合材料由尺寸为500 nm左右的球状微晶组成，其中20 nm左右的Ag纳米颗粒均匀附着在立方相InP微球表面上，表面较为粗糙。以刚果红为目标降解物，利用荧光和紫外光谱对所得产物进行光催化性能测试，结果发现，与单体InP微晶相比，Ag/InP复合材料形成后，其对刚果红的光催化降解活性提高，这可能是由于Ag纳米颗粒均匀附着后，有效分离InP的光生电子和空穴。此外，对不同银负载量的Ag/InP的光催化性能进行研究。研究表明：当负载量为73.3%时，所得产物的光催化性能最佳，降解率可达64%。

Ag/InP；荧光光谱；光催化性能;复合材料

Abstract： InP microcrystal was successfully synthesizedviaa facile hydrothermal route, and then Ag nanoparticles were loaded on the surface of InP microcrystal using UV lamp to reduce silver versions. The as-prepared composites were characterized by X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM). The results show that Ag/InP composite is composed of lots of spherical microcrystals with a size of 500nm and Ag nanoparticles with a diameter of 20 nm loaded uniformly on the surface of cubic phase InP microspheres,the surface is rough. Using Congo red as model organic pollutant, the photo-catalytic performance of Ag/InP microspheres is further detected by fluorescence and UV-vis spectra. It is found that the as-prepared composite exhibits a superior photo-catalytic degradation activity as compared to InP, which might be the effective separation of electrons and holes after Ag nanoparticles loaded on the surface of InP microspheres.In addition,the photo-catalytic performance of Ag/InP microspheres with different Ag loads was studied，and the results show that when the loading is 73.3%,the photocatalytic activity of the product is the best,and the degradation rate is 64%.

Keywords：Ag/InP;fluorescene spectroscopy;photo-catalytic performance;composite

磷化铟(InP)，作为一种典型的III-V族半导体材料，常温下禁带宽度为1.35eV，电子迁移率为5400cm2·V-1·s-1[1,2]，由于其具有优异的电学和光学特性，因此在电子和光电子纳米器件中得到广泛应用[3,4]。然而，较高的光生电子和空穴复合率、表面易氧化、稳定性差等缺点[5]，限制了其在光催化领域的发展。贵金属对半导体纳米……