广西师范大学学报（自然科学版）2016，Vol.34Issue(4)：60-69,10.DOI:10.16088/j.issn.1001-6600.2016.04.010
方形花状Bi2WO6可见光催化降解制革废水
Photocatalytic Degradation of Tannery Wastewater by Square Flower-like Bi2WO6 under Visible Light
摘要
Abstract
Using Bi(NO3)3 · 5H2O and Na2WO3 · 2H2O as raw materials,Bi2WO6 was successfully synthesized by hydrothermal method with ethylenediamine tetraacetic acid (EDTA) as the chelating agent.The properties of the as-prepared samples were investigated by XRD,SEM,Raman and UV-vis DRS tests.The as-prepared products were used to photodegrade tannery wastewater.The effects of dosage of Bi2WO6 photocatalyst,air flow rate,pH of wastewater,H2O2 dosage and the illumination intensity on the wastewater degradation were investigated in detail.The results showed that highly crystallinity square flower-like Bi2WO6 with its band gap of 2.696 eV could be obtained via a hydrothermal route assisted by EDTA.The Bi2WO6 could effectively degrade the hardly-degraded organic pollutants,and the CODcr removal rate increased significantly.The optimum conditions of treatment of tannery wastewater were natural pH value,Bi2 WO6 of 2 g/L,H2 O2 of 2 ％,amount of air of mid-range,distance of light liquid light of 11 cm,reaction time of 3.0 h.Under the optimal conditions,the decolorization rate and CODcr removal rate were 91.5％ and 92.6％.The dynamic behavior of Bi2 WO6 photocatalyst degrading the molasses fermentation wastewater agrees with the firstorder rate dynamic equation.关键词
Bi2WO6/水热法/制革废水/脱色率/CODcr去除率Key words
Bi2 WO6/hydrothermal method/tannery wastewater/decolorization rate/CODcr removal分类
化学化工引用本文复制引用
陈渊,杨家添,韦庆敏,晏全,黎中良,秦颖瑜..方形花状Bi2WO6可见光催化降解制革废水[J].广西师范大学学报（自然科学版）,2016,34(4):60-69,10.基金项目
广西科学研究与技术开发计划项目(桂科攻1598007-1) （桂科攻1598007-1）
广西教育厅科研项目(KY2015ZD097,LX2014295) （KY2015ZD097,LX2014295）
广西理工科学实验中心开放课题(LGZXKF201111) （LGZXKF201111）
玉林师范学院教授科研启动基金(G20140006) （G20140006）
全国大学生创新创业训练计划项目(201510606021,201610606008) （201510606021,201610606008）
