Template-free synthesized hollow NiO–SnO2 nanospheres with high gas-sensing performance
Template-free synthesized hollow NiO–SnO2 nanospheres with high gas-sensing performance
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DOI：
10.1016/j.snb.2012.01.063
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发表时间：
2012-03
影响因子：
8.4
通讯作者：
Lili Wang;Jianan Deng;Teng Fei;Tong Zhang
中科院分区：
文献类型：
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作者：
Lili Wang;Jianan Deng;Teng Fei;Tong Zhang
采用简单的一锅法无模板法制备了NiO-SnO2中空纳米球。以锡酸盐和硝酸镍为前驱体，在庚烷-乙醇混合溶剂中进行溶剂热处理。中空纳米球的直径约为200-300 nm，壁厚约为50 nm，壳层由大量的小纳米颗粒组成。与实心NiO-SnO2纳米球气敏元件相比，NiO-SnO2中空纳米球气敏元件对NH3的响应速度快，响应恢复快。传感器性能的提高归功于更大的比表面积和快速的气体扩散。
Hollow NiO–SnO2nanospheres have been fabricated via a simple one-pot template-free method. The synthesis is based on solvothermal treatment of stannate and nickel nitrate as the precursor in a mixed solvent of heptane–ethanol. The hollow nanospheres show diameters of about 200–300nm with the wall thickness of about 50nm, and the shell consists of numerous small nanoparticles. The gas sensor based on hollow NiO–SnO2nanospheres exhibits high response and quick response–recovery to NH3, which are much better compared with sensors based on solid NiO–SnO2nanospheres. The enhanced sensor performances are attributed to the larger surface area and fast gas diffusion.