Facile synthesis of tin oxide nanocrystals and their photocatalytic activity  

SnO_2纳米晶的制备及光催化性能(英文)

作　　者：贾志谦[1] 孙慧杰[1] 王妍[1] 甄甜丽 常青[1,2] 

机构地区：[1]北京师范大学化学学院,北京100875 [2]装甲兵工程学院再制造技术重点实验室,北京100072

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第6期1813-1818,共6页中国有色金属学报（英文版）

基　　金：Projects (20676016,21076024) supported by the National Natural Science Foundation of China

摘　　要：Tin oxide nanociystals with diameters smaller than 10 nm were synthesized using Na2SnO3 and CO2 as reactants and cetyltrimethylammonium bromide（CTAB） as stabilizer under mild conditions.As a mild acidic gas,CO2 is favorable for the accurate adjustment of pH value of Na2SnO3 solution.Stannate salt is stable,cheap and easy in operation.The effects of Na2SnO3concentration,CTAB concentration,aging temperature,and aging time on the nanociystals were studied.It was found that,with the increasing Na2SnO3 concentration,aging temperature and aging time,SnO2 nanociystals size decreases.The formation of SnO2nanociystals can be interpreted by electrostatic-interaction mechanism.SnO2 nanociystals show high photocatalytic activities in the degradation of Rhodamine B solution.The catalytic activity of small nanocrystals is higher than that of large ones.以Na_2SnO_3和CO_2为反应物,十六烷基三甲基溴化铵(CTAB)为稳定剂,在温和条件下合成粒径小于10nm的SnO_2纳米晶。CO_2作为酸性气体,有利于精确调控Na_2SnO_3溶液的pH值,Na_2SnO_3价廉且性质稳定,易于操作。研究Na_2SnO_3浓度、CTAB浓度、熟化温度和熟化时间等对产物的影响。结果表明,随着Na_2SnO_3浓度的增加、熟化温度的升高和熟化时间的延长,粒径变小,粒子形成过程可由静电作用机理解释。SnO_2纳米晶具有良好的光催化活性,且随着粒径的减小,其活性增大。

关 键 词：tin oxide nanocrystals facile synthesis photocatalytic activity 

分 类 号：TB383.1[一般工业技术—材料科学与工程]