摘要
以结晶四氯化锡(SnCl4.5H2O)为原料,聚乙二醇(PEG)为模板剂,采用微波水热法制备了单分散性良好的SnO2微球。通过XRD、SEM、TEM等对产物的结构和形貌进行分析,初步研究了SnO2微球的生长机理并以罗丹明B为模拟污染物研究其光催化活性。结果表明:SnO2微球是由大量细小晶粒堆积而成的,微球直径约1.3μm。PEG分子在超声分散及搅拌作用下形成小球模板,后续的水热反应使生长单元在模板上不断地沉积、长大,进而形成规则SnO2微球。光催化实验表明所制备的SnO2微球具有较高的光催化活性。
Well monodispersed SnO2 microspheres were synthesized using poly（ethylene glycol）（PEG） as template and SnCl4·5H2O as raw materials under microwave hydrothermal conditions.The chemical structure and surface morphology of the as-prepared samples were characterized by XRD,SEM,TEM.The growth mechanism was explored.In addition,the photocatalytic properties of the SnO2 microspheres were evaluated by rhodamine B aqueous solution as simulated pollutant.The results showed that the SnO2 microspheres with diameter about 1.3 μm were aggregated with numerous nanocrystals.It is considered that the growth mechanism of SnO2 microspheres is that the PEG molecules aggregate to form globules by ultrasonic pretreatment and magnetically stirring in the solution,the growth cells are deposited continuously on the globule templates during the hydrothermal process.Finally,the uniform SnO2 microspheres are obtained.Photocatalytic experiment showed that the prepared products have good photocatalytic activities.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2011年第5期1203-1208,共6页
Journal of Synthetic Crystals
基金
高等学校博士学科点专项科研基金(20096125110001)
陕西科技大学研究生创新基金资助
关键词
二氧化锡
微波水热
生长机理
光催化降解
tin oxide
microwave hydrothermal
growth mechanism
photocatalytic degradation
