微波水热法制备Cr3+掺杂ZnO纳米晶及其光催化性能.pdf

硅酸盐学报· 1692 ·2013年DOI:.0454- 微波水热法制备Cr3+掺杂ZnO纳米晶及其光催化性能李丹,黄剑锋,曹丽云,李嘉胤,欧阳海波(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) 摘要:以Zn(NO)·6HO为锌源、Cr(NO)·9HO为铬源,采用微波水热法制备了不同Cr掺杂比例的ZnCrO纳米晶。借助于X射线衍射、扫描电子显微镜和紫外–可见(UV–Vis)光谱分别对产物的物相、形貌和光学性能进行分析。结果表明:随着Cr掺杂量的增加,ZnO纳米晶的衍射峰向高角度方向漂移;ZnO纳米晶的显微结构呈片状,且由规则片层结构向无规则片状结构转变;UV–Vis光谱分析表明,所制备Cr掺杂ZnO纳米晶对紫外光有强烈的吸收,其禁带宽度减小。可见光催化测试结果表明,Cr掺入使氧化锌的光催化性能有所提高,当掺杂量为5%时,其光催化性能最优,%。关键词:氧化锌;掺铬;微波水热法;光催化性能中图分类号:+2 文献标志码:A 文章编号:0454–5648(2013)12–1692–05 网络出版时间:2013–11–29 13:42:00 网络出版地址:s/detail/ Microwave Hydrothermal Synthesis of Cr3+-doped ZnO Nanoparticles and Their Photocatalytic Properties LI Dan,HUANG Jianfeng,CAO Liyun,LI Jiayin,OUYANG Haibo (Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi’an 710021, China) Abstract: Zn1–(3/2)xCrxO nanoparticles with different Cr3+ doping contents (., 0, 2%, 5%, 8% and 10% in mole fraction) were syn-thesized with Zn(NO3)2·6H2O as Zn source and Cr(NO3)3·9H2O as Cr source materials by a microwave hydrothermal method. The phase, morphology and optical properties of the as-prepared samples were characterized by X-ray diffraction (XRD), scanning elec-tron microscopy and ultraviolet–visible (UV–Vis) spectroscopy, respectively. The