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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。
An organic-inorganic composite nanofiber membrane was successfully prepared by electrospinning using polyvinylpyrrolidone (PVP) / aluminum chloride (AlCl 3) / crystalline tin tetrachloride (SnCl 4 · 5H 2 O) as raw materials. After calcination, 800nm SnO 2 / Al 2 O 3 nanofibers. XRD results showed that the grain size of SnO_2 and Al_2O_3 increased with the increase of calcination temperature. With the decrease of heating rate, the crystal became more complete and the grains arranged more closely. The effect of holding time on the crystallization was insignificant. Experiments show that after the hybrid fiber membrane is calcined at 900 ℃, the stannic chloride completely transforms into the tetragonal red stone structure SnO 2, while the aluminum chloride transforms into the largest specific surface area and the highest activity γ-Al 2 O 3.