磁性CuS/γ-Fe_2O_3复合材料光催化处理染料废水
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摘要
以氯化铜、纳米γ-Fe_2O_3和硫脲为原材料,乙二醇为溶剂,采用溶剂热法制备了磁性CuS/γ-Fe_2O_3复合光催化剂。考察了该光催化剂对刚果红染料废水的处理效果。在m(CuS)∶m(γ-Fe_2O_3)=2∶1、刚果红初始质量浓度为10 mg/L、光催化剂投加量为0.6 g/L的最佳工艺条件下,刚果红去除率达96.51%。阴离子Cl~-、NO_3~-及SO_4~(2-)对该光催化剂的催化活性具有促进作用,其中SO_4~(2-)的促进作用最显著。该光催化剂具有较好的活性稳定性,重复使用6次后刚果红去除率仍高达90.50%。
Magnetic CuS/γ-Fe_2O_3 composite photocatalyst was prepared by solvothermal method,using copper chloride,nano γ-Fe_2O_3 and thiourea as raw materials,and ethylene glycol as solvent. The treatment effects of Congo Red wastewater on the photocatalyst was investigated. Under the optimum process conditions of m(CuS)∶m(γ-Fe_2O_3)=2∶1,initial Congo red mass concentration 10 mg/L and photocatalyst dosage 0.6 g/L,the removal rate of Congo red is 96.51%. The anions such as Cl~-,NO_3~- and SO_4~(2-) promoted the catalytic activity of the photocatalyst,wherein the promotion by SO_4~(2-) was the most significant. The photocatalyst has good activity stability,and the removal rate of Congo Red is still as high as 90.50 % after reused for 6 times.
Magnetic CuS/γ-Fe_2O_3 composite photocatalyst was prepared by solvothermal method,using copper chloride,nano γ-Fe_2O_3 and thiourea as raw materials,and ethylene glycol as solvent. The treatment effects of Congo Red wastewater on the photocatalyst was investigated. Under the optimum process conditions of m(CuS)∶m(γ-Fe_2O_3)=2∶1,initial Congo red mass concentration 10 mg/L and photocatalyst dosage 0.6 g/L,the removal rate of Congo red is 96.51%. The anions such as Cl~-,NO_3~- and SO_4~(2-) promoted the catalytic activity of the photocatalyst,wherein the promotion by SO_4~(2-) was the most significant. The photocatalyst has good activity stability,and the removal rate of Congo Red is still as high as 90.50 % after reused for 6 times.
引文
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[2]任南琪,周显娇,郭婉茜,等.染料废水处理技术研究进展[J].化工学报,2013,64(1):84-94.
[3]齐慧,黄剑锋,曹丽云,等.微波水热时间对CuS微晶形貌及光催化性能的影响[J].人工晶体学报,2011,40(5):1188-1193.
[4]张玥,美燕,梁新惠.硫化锌纳米晶体的合成及性能表征[J].人工晶体学报,2013,42(9):1796-1801.
[5]赵荣祥,李秀萍,徐铸德.离子液辅助水热法合成树枝状硫化镉及光催化性能[J].材料工程,2014,10(2):7-12.
[6]陈燕,刘莹,张东梅,等.不同形貌CuS微球的可控合成及光催化性质研究[J].化工科技,2018,26(2):26-31.
[7]赵娟,胡慧芳,曾亚萍,等.花状硫化铜级次纳米结构的制备及可见光催化活性研究[J].物理学报,2013,62(15):467-473.
[8]MURUGAN S,RAJENDRAN R,E JAMES J S,et al.Enhanced visible light photocatalytic reduction of organic pollutant and electrochemical properties of CuScatalyst[J].Powder Technol,2015,279(7):209-220.
[9]贾博,杨柳,翟鹏,等.水热/溶剂热法制备CuS及其复合光催化材料的研究进展[J].硅酸盐通报,2015,34(2):420-427.
[10]谭志刚,朱启安,郭讯枝,等.溶剂热法合成硫化铜花状微米球超结构及其光催化性能[J].化学学报,2011,69(23):2812-2820.
[11]陈彰旭,郑炳云,李先学,等.模板法制备纳米材料研究进展[J].化工进展,2010,29(1):94-99.
[12]高书燕,贾晓霞,张驰,等.生物分子辅助的纳米材料绿色合成[J].化学通报,2011,74(1):24-31.
[13]李文文,孙运飞,赵广超.磁性氧化石墨烯和磁性竹炭对Cr(Ⅵ)的吸附[J].化工环保,2014,34(6):585-589.
[14]ZHU H,JIANG R,XIAO L,et al.Photocatalytic decolorization and degradation of congo red on innovative crosslinked chitosan/nano-CdS composite catalyst under visible light irradiation[J].J Hazard Mater,2009,169(1/3):933-940.
[15]张玲,蔡颖,黄春梅,等.新型Fe3O4@GO@TiO2光-芬顿催化剂降解刚果红[J].环境科学与技术,2018,41(6):57-62.
[16]JIANG R,YAO J,ZHU H Y,et al.Effective decolorization of congo red in aqueous solution by adsorption and photocatalysis using novel magnetic alginate/γ-Fe2O3/Cd S nanocomposite[J].Desalin Water Treat,2014,52(1/3):238-247.
[17]陆一达,刘国光,王枫亮,等.ZnFe2O4/TiO2复合材料的制备及其在模拟太阳光下光催化降解吲哚美辛的动力学和机理研究[J].环境化学,2017,36(12):2550-2557.
[18]JIANG R,GUAN Y J,ZHU H Y,et al.Effect of inorganic anions on the photocatalytic decolorization of an azo dye in the aqueous phase by cadium sulphide/polymer nanocomposite films under visible light irradiation[J].Color Technol,2011,127(6):426-433.
[19]CHEN Y,SONG Y F.Highly selective and efficient removal of Cr(Ⅵ)and Cu(Ⅱ)by the chromotropic acid-intercalated Zn-Al layered double hydroxides[J].Ind Eng Chem Res,2013,52(12):4436-4442.
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