Wang Yu, Dong Lin, Jia Xiaolin, Chen Deliang, Guan Shaokang
School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
J Nanosci Nanotechnol. 2011 Apr;11(4):3592-6. doi: 10.1166/jnn.2011.3719.
SnO2 nanoparticles were prepared via a sol-gel method by heating the mixture of hydrous SnO2 nanoparticles and SiO2 nanospheres at 600 degrees C. The average particle size of the obtained SnO2 nanoparticles is 3.3 nm, smaller than that of the SnO2 nanoparticles ( 6.4 nm) prepared by calcining the pure hydrous SnO2 at 600 degrees C. The restricting effect of SiO2 on the growth of SnO2 nanoparticles was discussed by Raman spectra. A blue shift of A1g ) and B2g Raman modes in SnO2/SiO2 composite was observed, and it was considered to be a compressive stress effect. The obtained SnO2 nanoparticles with a size of about 3.3 nm exhibit enhanced ethanol response at room temperature, and their recovery time is much shorter than that of the SnO2 nanocrystals with a size of about 6.4 nm.
通过溶胶 - 凝胶法，在600℃下加热含水SnO₂纳米颗粒和SiO₂纳米球的混合物来制备SnO₂纳米颗粒。所得SnO₂纳米颗粒的平均粒径为3.3nm，小于通过在600℃下煅烧纯含水SnO₂制备的SnO₂纳米颗粒（6.4nm）。通过拉曼光谱讨论了SiO₂对SnO₂纳米颗粒生长的限制作用。观察到SnO₂/SiO₂复合材料中A1g和B2g拉曼模式的蓝移，这被认为是一种压应力效应。所制备的尺寸约为3.3nm的SnO₂纳米颗粒在室温下表现出增强的乙醇响应，并且它们的恢复时间比尺寸约为6.4nm的SnO₂纳米晶体的恢复时间短得多。
