Pr_2InNdO_7光催化剂的合成及性能  

Synthesis and Properties of Pr_2 InNdO_7 Photocatalysts

作　　者：郏青峰 李慧泉[2] 崔玉民[2] 张凯凯[2] 朱良俊[2] 

机构地区：[1]安徽大学化学化工学院,合肥230039 [2]阜阳师范学院化学化工学院,阜阳236037

出　　处：《材料导报》2013年第22期33-36,40,共5页Materials Reports

基　　金：国家自然科学基金(21201037);安徽省高校省级自然科学研究项目(KJ2012A217);环境污染物降解与监测省级实验室校级专项(2012HJJC01ZD;2013HJJC01ZD);安徽大学研究生创新研究项目(10117700085)

摘　　要：采用固相反应法在873 K合成了Pr2InNdO7光催化剂,通过X射线衍射（XID）、比表面积（BET）、光致发光（PL）和紫外-可见漫反射（UV-Vis DRS）测试手段对其进行了表征.以亚甲基蓝（MB）为光催化反应的模型化合物,在紫外和可见光的照射下对Pr2InNdO7光催化剂的活性进行了评价.结果表明：Pr、In、Nd的质量比对Pr2 InNdO7样品的光催化活性有重要的影响,当Pr、In、Nd的质量比为1：4：1时,Pr2 InNdO7样品的紫外和可见光催化活性分别达到最大值,并且它的光催化活性明显高于纯In2O3.这显著提高的光催化活性主要归功于适量的Pr2 O3、Nd2O5与In2 O3复合增加了它的比表面积,改善了光生电子-空穴对的分离效率以及提高了其在200～800 nm区域的光吸收强度.Pr2 InNdO7 photocatalysts were prepared by solid phase reaction method at 873 K and characterized by means of X-ray diffraction （XRD）,Brunauer-Emmett-Teller （BET）,photoluminescence （PL） spectra and UV visible diffuse reflection spectroscopy （UV-Vis DRS）.The activities of Pr2 InNdO7 photocatalysts were evaluated by using methylene blue （MB） as a mode compound of photocatalytic reaction under UV and visible light irradiation.The results show that m（Pr）/m（In）/m（Nd） have an important effect on the photocatalytic activities of Pr2 InNdO7 samples.When m（Pr）/m（In）/m（Nd） is 1：4：1,the photocatalytic activities of Pr2InNdO7 samples reach the maximums under UV and visible light irradiation,respectively,and its photocatalytic activities are obviously higher than those of pure In2 O3.The remarkably enhanced photocatalytic activities can be mainly attributed to the fact that a proper amount of Pr2 O3 and Nd2 O5 combined with In2O3 increase its BET surface area,improve the separation efficiency of photogenerated electrons and holes,and enhance the absorption intensity in 200-800 nm light region.

关 键 词：Pr2InNdO7 固相反应 光催化 亚甲基蓝 

分 类 号：O643[理学—物理化学]