摘要
以氯化锌、氯化镉、氢氧化钠为原料,采用水热法合成Cd掺杂纳米花状ZnO光催化剂,并通过该样品对罗丹明B水溶液的降解来研究其光催化活性。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线能量色散谱(EDS)、光致发光谱(PL)及紫外-可见分光光度计(UV-Vis)等测试手段对材料物性进行表征。实验结果表明:当掺杂Cd2+时,样品形貌发生变化、粒径减小;掺杂Cd2+后的ZnO的吸收边和紫外峰对比于纯ZnO均发生红移,禁带宽度由3.24 eV减小到3.16 eV。通过光催化实验分析可知,掺杂后纳米ZnO光催化剂对罗丹明B水溶液的降解率有所提高,光照3 h其降解率高达98%,说明与纯ZnO相比,Cd掺杂ZnO纳米花具有更高的光催化活性。
The flower-like Cd-doped ZnO nanostructures were synthesized by hydrothermal method using zinc chloride（ZnCl2）, cadmium chloride（CdCl2）, sodium hydroxide（NaOH） as reactants.Then, the photocata-lytic activities of as-grown samples were investigated by photo-degradation of rhodamine B（RhB）.The sam-ples were characterized by X-ray diffraction（XRD）, scanning electron microscopy （SEM）, energy-dispersive X-ray analysis（EDS）, photoluminescence（PL） spectroscopy, UV-visible spectroscopy.Experimental results show that with the Cd doping , the morphologies of ZnO changed greatly , and the size of ZnO became smaller . In addition, compared with the undoped ZnO , the absorption edge and the UV emission peak of the Cd-doped ZnO nanoflowers made a red shift clearly .The band gap decreased from 3.24 eV to 3.16 eV.Finally, in the photocatalytic experiment , the photocatalytic activity of Cd-doped ZnO was enhanced , and the degradation of rhodamine B（RhB） was up to 98%after the irradiation for 3 h.So the photocatalytic activities of Cd-doped ZnO nanoflowers were higher than that of the undoped ZnO .
出处
《中国光学》
EI
CAS
2014年第1期124-130,共7页
Chinese Optics
基金
国家自然科学基金资助项目(No.61006065
No.61076039
No.61204065
No.61205193
No.10804071)
高功率半导体激光国家重点实验室基金资助项目(No.9140C310101120C031115)
高等学校博士学科点专项科研基金资助项目(No.21022216110002
No.20102216110001
No.20112216120005)
吉林省自然科学基金资助项目(No.20101546
No.20100111)
吉林省科技发展计划资助项目(No.20090139
No.20090555
No.20121816
No.201201116)
吉林省教育厅资助项目(No.2011JYT05
No.2011JYT10
No.2011JYT11)
长春市国际科技合作计划资助项目(No.2010CC02)
吉林农业大学科研启动基金资助项目(No.201238)
