张永兴^1,,
赵园园¹,
童佩斐¹,
李佳¹,
李丽¹,
朱光平¹
1.淮北师范大学 先进功能复合材料协同创新中心， 淮北 235000
基金项目: 国家自然科学基金青年基金资助项目(51302102)
安徽省自然科学基金面上资助项目(1708085ME96)
安徽省高等学校省级自然科学研究重点资助项目(KJ2016A638, KJ2016SD53)
淮北师范大学研究生教育教学研究资助项目(2017jyxm09)

Preparation of ZnO/AgBr composite micro/nanosphere and its performance in degradation of rhodamine B

ZHANG Yongxing^1,,
ZHAO Yuanyuan¹,
TONG Peifei¹,
LI Jia¹,
LI Li¹,
ZHU Guangping¹
1.Advanced Functional Composites Collaborative Innovation Center, Huaibei Normal University, Huaibei 235000, China

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摘要:使用简单丙三醇-水混合溶剂热法制备碱式碳酸锌微纳米球前驱物，经退火得到ZnO微纳米球，通过液相沉淀法把AgBr纳米颗粒固定在ZnO微纳米球表面，在AgBr 和ZnO之间形成异质结有效地增强了 AgBr/ZnO复合物的光催化活性。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)与紫外可见分光光度计对样品物相、形貌、元素组成及光学性质进行表征。在可见光条件下，研究ZnO及不同AgBr量的ZnO/AgBr复合材料的光催化活性，结果表明：循环修饰5次AgBr的ZnO微纳米球(AgBr颗粒负载质量分数为5%，5%-AZ)样品对罗丹明B的光催化降解性能最好；该复合材料的光催化可重复性使用结果显示循环使用次数的增加，其光催化性能有下降的趋势。通过分析可知在光照条件下 AgBr的分解引起异质结构变化。
关键词: ZnO/AgBr/
微纳米球/
异质结/
光催化

Abstract:ZnO micro/nanospheres were obtained by calcination treatment of a pre-synthesized basic zinc carbonate precursor micro/nanospheres prepared using a simple, glycerol-mediated solvothermal method. AgBr nanoparticles were then immobilized on the surface of the ZnO micro nanospheres by liquid phase precipitation method. A hetero-junction structure was formed between AgBr and ZnO, which efficiently enhanced photocatalytic activity of AgBr/ZnO composite. The phase, morphology, elemental composition and optical spectra of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and UV-vis spectrophotometer, respectively. The photocatalytic activities of ZnO and ZnO/AgBr composites with different AgBr contents were investigated under visible light illumination. The experimental results show that the ZnO micro/nanospheres modified with AgBr about 5 cycle times (the loading mass percent of AgBr particles is 5%, 5%-AZ) have the best photocatalytic activity for the degradation of rhodamine B(RhB). Renewable photocatalytic activity of the sample shows a downward trend with the cycle times increased. The reason can be attributed to the change of heterogeneous structure caused by the decomposition of AgBr under illumination.
Key words:ZnO/AgBr/
micro/nanospheres/
heterojunction/
photocatalysis.

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刊出日期:2018-05-19

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ZnO/AgBr复合微纳米球的制备及其光催化降解罗丹明B的性能

张永兴^1,,
赵园园¹,
童佩斐¹,
李佳¹,
李丽¹,
朱光平¹
1.淮北师范大学 先进功能复合材料协同创新中心， 淮北 235000
基金项目: 国家自然科学基金青年基金资助项目(51302102) 安徽省自然科学基金面上资助项目(1708085ME96) 安徽省高等学校省级自然科学研究重点资助项目(KJ2016A638, KJ2016SD53) 淮北师范大学研究生教育教学研究资助项目(2017jyxm09)
关键词: ZnO/AgBr/
微纳米球/
异质结/
光催化
摘要:使用简单丙三醇-水混合溶剂热法制备碱式碳酸锌微纳米球前驱物，经退火得到ZnO微纳米球，通过液相沉淀法把AgBr纳米颗粒固定在ZnO微纳米球表面，在AgBr 和ZnO之间形成异质结有效地增强了 AgBr/ZnO复合物的光催化活性。利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、能谱仪(EDS)与紫外可见分光光度计对样品物相、形貌、元素组成及光学性质进行表征。在可见光条件下，研究ZnO及不同AgBr量的ZnO/AgBr复合材料的光催化活性，结果表明：循环修饰5次AgBr的ZnO微纳米球(AgBr颗粒负载质量分数为5%，5%-AZ)样品对罗丹明B的光催化降解性能最好；该复合材料的光催化可重复性使用结果显示循环使用次数的增加，其光催化性能有下降的趋势。通过分析可知在光照条件下 AgBr的分解引起异质结构变化。

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