引用本文:张静,周瑞兴,吴江,陆佳,王健敏,孙小明,余萱,等.乙二醇与水对Bi2O2CO3结构及其脱Hg性能的影响[J].环境科学研究,2017,30(4):592-597.
ZHANG Jing,ZHOU Ruixing,WU Jiang,LU Jia,WANG Jianmin,SUN Xiaoming,YU Xuan,et al.Impacts of Glycol and Water on Bi2O2CO3 Structure and Its Performance on Photocatalytic Removal of Mercury[J].Reserrch of Environmental Science,2017,30(4):592-597.]
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乙二醇与水对Bi2O2CO3结构及其脱Hg性能的影响
张 静, 周瑞兴, 吴 江, 陆 佳, 王健敏, 孙小明, 余 萱
上海电力学院能源与机械工程学院, 上海 200090
摘要:
采用水热法制备Bi2O2CO3纳米光催化剂,研究了乙二醇和水的体积比对Bi2O2CO3制备的影响,采用XRD(X射线衍射)、SEM(扫描电子显微镜)、BET比表面积等表征手段对Bi2O2CO3性能及其结构进行表征,并对Bi2O2CO3在紫外光条件下光催化脱除气体中单质Hg的性能进行了研究.结果表明:当乙二醇和水共同作用时有助于Bi2O2CO3孔径的增大,当V(乙二醇)∶V(水)为2∶1时,孔径达到最大,为33 nm;脱Hg效率与Bi2O2CO3孔径的大小呈正相关,线性直线斜率(k)为1.64.当孔径达到最大值33 nm时,紫外光条件下的Bi2O2CO3纳米光催化剂光催化脱Hg效率也达到最大值(81%).研究显示,Bi2O2CO3纳米光催化剂孔径的增大会延长单质Hg在光催化剂表面的停留时间,有利于光催化反应的进行.
关键词:  Bi2O2CO3  形貌  光催化  Hg
DOI:
分类号:
基金项目:国家自然科学基金项目(51106133);上海市科技攻关项目(15dz1200703,15110501000)
Impacts of Glycol and Water on Bi2O2CO3 Structure and Its Performance on Photocatalytic Removal of Mercury
ZHANG Jing, ZHOU Ruixing, WU Jiang, LU Jia, WANG Jianmin, SUN Xiaoming, YU Xuan
School of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
Abstract:
Abstract: Bi2O2CO3 nano catalysts were prepared by hydrothermal method,and the effects of ethylene glycol and water on preparation of Bi2O2CO3 were studied by an experiment changing the volume ratio of ethylene glycol to water.XRD,SEM and BET were employed to characterize the properties and structure of the as-prepared samples.At the same time,the mercury removal performance under UV light was experimentally studied.The results showed that it is beneficial for the growth of the pore size of Bi2O2CO3 when ethylene glycol and water acted as common solvent.When the volume ratio of ethylene glycol and water was 2∶1,pore diameter reached the maximum,i.e.,33 nm.Furthermore,the mercury photocatalytic oxidation efficiency was positively correlated with the pore diameter.After linear fitting,the slope of the line(k)was 1.64.With the increase of pore diameter,photocatalytic oxidation mercury efficiency increased.When pore diameter reached the maximum(i.e.,32 nm),the mercury photocatalytic oxidation efficiency also reached the maximum,81%.Studies have shown that the larger pore size will prolong the residence of Hg on the surface of Bi2O2CO3,which is beneficial for photocatalytic removal of element mercury reaction.
Key words:  Bi2O2CO3  morphology  photocatalytic  mercury