摘要
以聚乙烯吡咯烷酮(PVP)/氯化铝(AlCl_3)/结晶四氯化锡(SnCl4_·5H_2O)为原料,采用静电纺丝技术成功制备了有机无机复合纳米纤维膜,经过煅烧得到直径为150～800nm的SnO_2/Al_2O_3纳米纤维。XRD分析结果表明:随着煅烧温度的升高,SnO_2、Al_2O_3的晶粒尺寸增加;随着升温速率降低,其结晶越完整,晶粒排列更紧密;保温时间对结晶的影响不大。实验证实杂化纤维膜经900℃煅烧后,氯化锡完全转变成了四方红金石型结构的SnO_2,而氯化铝转变成比表面积最大、活性最高的γ-Al_2O_3。
Organic/inorganic compound nanofiber membrane was prepared through the etectrospinning technology successfully using PVP/A1C13/SnC14·5H20 as raw material. SnO2/A1203 nanofiber with diameter 150-800nm can be manufactured through calcining the produced organic/inorganic hybridization fiber membrane. Through the XRD analysis, along with the calcination temperature increasing, the SnO2, Al203 grain size increases. As the heating rate reduces, crystallization grains of SnO2, Al2O3 get more complete, crystal arrangement becomes more closely. There is little impact on the holding time. After high temperature calcine, the tin chloride is transformed into rutile SnO2 completely, and the aluminum chloride is turned into γ-Al2O3 which has the largest surface area and the highest activity.
基金
天津市大学生创新性实验计划
