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摘要
通过湿浸渍法制备出了Cu2O/BiFeO3可见光响应型异质结光催化剂,将它们用于光催化还原去除水溶液中的U(Ⅵ),并研究了复合光催化剂在不同条件下的光催化效果。通过扫描电子显微镜(SEM)、X射线能谱分析(EDS)和紫外可见漫反射分析(UV-Vis)法对催化剂材料进行了表征分析。结果表明,在溶液pH为5,U(Ⅵ)的初始浓度为5mg/L,空穴捕获剂用量为8%的条件下,Cu2O质量分数为15%时Cu2O/BiFeO3异质结光催化剂对溶液中U(Ⅵ)的催化还原速率最快,反应到100min时去除率达到99%。
Abstract
The visible light-responsive heterojunction photocatalysts Cu2O/BiFeO3 were prepared by wet impregnation method.The photocatalysts was used in the experiment of photocatalytic reduction and removal of U(Ⅵ) in aqueous solution,and studied their photocatalytic effects under different conditions.Through scanning electron microscopy (SEM),X-ray energy spectrum (EDS) and UV-visible diffuse reflectance (UV-Vis) to characterize and analyzed the catalyst materials.The results shown that under the condition of pH=5,the initial concentration of U(Ⅵ) was 5mg/L,and the amount of hole trapping agent was 8%,the Cu2O/BiFeO3 photocatalyst with 15% Cu2O ratio had the fastest catalytic reduction rate of U(Ⅵ).The removal rate reached 95% when the reaction time was 100 min.
关键词
氧化亚铜/铁酸铋
/
可见光
/
光催化
/
铀酰离子
Key words
Cu2O/BiFeO3
/
Visible light
/
photocatalysis
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U(Ⅵ)
氧化亚铜/铁酸铋光催化剂催化还原溶液中U(Ⅵ)的性能研究[J].
化工新型材料, 2022, 50(7): 199-203 DOI:10.19817/j.cnki.issn1006-3536.2022.07.041
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基金资助
国家自然科学基金资助项目(41761090、11465002);江西省自然科学基金资助项目(20171ACB2021);国家重点实验室资助项目(NRE1608)
