摘要
采用氨水共沉淀法制备了一系列过渡金属Cu^(2+)掺杂SnO_(2)光催化材料(Cu-SnO_(2)),并将其用于光催化还原Cr(VI)的性能研究。详细考察了Cu^(2+)掺杂量、溶液p H值、Cr(VI)初始浓度等条件对Cu-SnO_(2)光催化性能的影响。结果表明,随着Cu^(2+)掺杂比例的提高,Cu-SnO_(2)的光催化活性呈现先增加后减小的趋势。其中,当Cu^(2+)掺杂量为5%时,Cu-Sn O_(2)表现出最佳的光催化活性,经150min的光照后,5%Cu-SnO_(2)对Cr(VI)的光催化还原率达到49%。Cu-SnO_(2)在酸性环境下光催化还原Cr(VI)的活性有所降低。随着Cr(VI)初始浓度的增加,光催化还原Cr(VI)的活性逐渐降低,而随着光催化剂用量的增加,Cu-SnO_(2)对Cr(VI)的光催化还原率逐渐增加。
A series of transition metal Cu^(2+)-doped SnO_(2) photocatalytic materials(Cu-SnO_(2))were prepared by ammonia-water co-precipitation and used for the performance study of photocatalytic reduction of Cr(VI).The effects of Cu^(2+)doping amount,solution pH,initial Cr(VI)concentration and other conditions on the photocatalytic performance of Cu-SnO_(2) were investigated in detail.The results show that with the increase of the doping ratio of Cu^(2+),the photocatalytic activity of Cu-SnO_(2) increases first and then decreases.Cu-SnO_(2) exhibited the best photocatalytic activity when the doping amount of Cu^(2+)was 5%,and the photocatalytic reduction rate of Cr(VI)by 5%Cu-SnO_(2) reached 49%after 150 min of irradiation.The activity of Cu-SnO_(2) in photocatalytic reduction of Cr(VI)was reduced in acidic environment.With the increase of the initial Cr(VI)concentration,the activity of photocatalytic reduction of Cr(VI)decreases gradually,while the photocatalytic reduction rate of Cr(VI)by Cu-SnO_(2) gradually increases with the increase of photocatalyst dosage.
作者
杨子轩
袁嘉慧
杨舒婷
王瑞琼
潘会
YANG Zi-xuan;YUAN Jia-hui;YANG Shu-ting;WANG Rui-qiong;PAN Hui(Faculty of Chemistry and Life Sciences,Hubei Second Normal University,Wuhan 430205,China)
出处
《化学工程师》
2025年第7期8-11,共4页
Chemical Engineer
基金
湖北省教育厅科学研究计划项目(B2023183)
湖北省大学生创新创业训练计划项目(S202414099042)。
