A Parallel Solid-State NMR and Sensor Property Study on Flower-like Nanostructured SnO2
A Parallel Solid-State NMR and Sensor Property Study on Flower-like Nanostructured SnO2
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DOI：
10.1021/jp1098156
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发表时间：
2010-12
影响因子：
3.7
通讯作者：
Qiong Wang;Le‐Sheng Zhang;Jianfeng Wu;Wen Wang;Weiguo Song;Wei Wang
中科院分区：
文献类型：
--
作者：
Qiong Wang;Le‐Sheng Zhang;Jianfeng Wu;Wen Wang;Weiguo Song;Wei Wang
分级三维花状纳米结构的SnO2球已被用于并行的气体传感和固态NMR研究。SnO2球表现出良好的响应和可逆性，一氧化碳，甲烷，甲醇和乙醇。在一个平行的固态核磁共振研究中，表面碳酸盐物种的观察后，暴露于所有的传感气体（CO，CH4，CH3OH，和CH3CH2OH）在不同的温度下的SnO2样品。在SnO2样品暴露于CO、CH3OH和CH3CH2OH之后，重要的中间物种，例如，还观察到表面甲酸盐物种和乙酸盐物种，其可在较高温度下转化为碳酸盐物种。表面碳酸盐物种将在SnO2表面进一步分解并转化为最终产物CO2。这种结合传感和固态NMR研究为传感过程中的表面化学提供了关键信息。
Hierarchical three-dimensional flower-like nanostructured SnO2 spheres have been used for a parallel gas sensing and solid-state NMR study. The SnO2 spheres exhibited a good response and reversibility for carbon monoxide, methane, methanol, and ethanol. In a parallel solid-state NMR study, surface carbonate species were observed on SnO2 samples after exposed to all sensing gases (CO, CH4, CH3OH, and CH3CH2OH) at different temperatures. After the SnO2 samples were exposed to CO, CH3OH, and CH3CH2OH, the important intermediate species, e.g., surface formate species and acetate species, were also observed, which could be transformed into carbonate species at higher temperatures. The surface carbonate species would be further decomposed on the SnO2 surface and transformed into the final product CO2. This combined sensing and solid-state NMR study provides crucial information for the surface chemistry during the sensing process.