摘要
以乙酸锌和氢氧化锂为原料,以无水乙醇为溶剂,采用微波辅助溶胶-凝胶法一步制备了纳米ZnO,用X射线衍射、紫外-可见吸收光谱、电子显微镜和电子能谱对其进行了表征.用紫外光作为光源,一定浓度的活性艳蓝为光催化反应模型污染物,研究了在不同反应时间下微波辐射合成的ZnO光催化性能并与传统溶胶-凝胶法合成的纯氧化锌作比较.结果表明,采用微波法合成的ZnO吸收边蓝移,粒径变小,光催化活性提高;微波辐射30min合成的ZnO光催化性能最好,当催化剂用量为10mg,对质量浓度为20mg/L的活性艳蓝溶液100mL的降解率40min达到90%.
To prepare nano-size ZnO,the zinc acetate and lithium hydroxide was used as raw material and ethanol as the solvent.The sol-gel method supplemented with microwave radiation was adopted.The samples were characterized by powder X-ray diffraction,UV-Vis spectroscopy,energy dispersive X-ray spectrum and electron microscopy.Under the condition of different microwave radiating times,the photocatalytic performance of prepared ZnO samples was studied using UV light as illumination device and XB-R as stimulant pollutant.The characterization and catalytic activities of ZnO prepared with microwave method are compared with that of one prepared using traditional sol-gel method.The results indicate that microwave synthesized ZnO has a smaller particle size and better photocatalytic activity than traditionally prepared ZnO.Sample with 30 minutes microwave radiation has the best performance.Its degradation ratio could reach 90 percent when 100 mL XB-R with the density 20 mg/L and 10 mg nano-size ZnO is irradiated under UV light for 40 minutes.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2012年第1期82-85,共4页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(20773014
20933001)
关键词
微波技术
光催化降解
纳米氧化锌
microwave radiation
photocatalytic degradation
nanometer zinc oxide
