期刊论文

中文

化工环保

1006-1878

2022

42

5

609-615

10.3969/j.issn.1006-1878.2022.05.016

湖南省教育厅重点科学研究项目（19A421）；

本校为第一机构

采用热聚合法制备了氮化碳-氧化铋-氧化铝(g-C_3N_4-Bi_2O_3/Al_2O_3)光催化剂,并通过XRD、SEM、XPS等多种手段进行了表征,考察了该催化剂对模拟含铀废水中U(Ⅵ)的光催化还原性能和重复利用性能,探讨了其光催化还原U(Ⅵ)的机理。结果表明,在g-C_3N_4-Bi_2O_3/Al_2O_3投加量为0.5 g/L、废水初始pH为5、U(Ⅵ)质量浓度为10 mg/L的条件下,经暗反应30 min、光反应60 min后,废水中U(Ⅵ)去除率达到98%。g-C_3N_4-Bi_2O_3/Al_2O_3重复使用5次后对U(Ⅵ)的去除率仍可达85%,表现出良好的稳定性和重复利用性能。g-C_3N_4-Bi_2O_3/Al_2O_3光催化剂还原U(Ⅵ)的主要机理是光生电子(e-)和超氧自由基(·O_2~-)的作...

The photocatalyst carbon nitride-bismuth oxide/alumina(g-C3N4-Bi2O3/Al2O3)was prepared by thermal polymerization and characterized by XRD,SEM,XPS and other means.Its photocatalytic reduction activity to U(Ⅵ)in simulated uranium-containing wastewater and its reuse performance were investigated.The mechanism of U(Ⅵ)photocatalytic reduction with g-C3N4-Bi2O3/Al2O3 was investigated.The results show that under the conditions of g-C3N4-Bi2O3/Al2O3 amount 0.5 g/L,initial pH 5,U(Ⅵ)mass concentration 10 mg/L,dark reaction time 30 min and light reacti...