Key Laboratory of Energy Resource and Chemical Engineering, State Key Laboratory Cultivation Base of Natural Gas Conversion, Ningxia University, Yinchuan 750021, People's Republic of China.
Nanoscale. 2015 Mar 7;7(9):4005-12. doi: 10.1039/c4nr05772d.
A class of formaldehyde (HCHO) gas sensors with a high response were developed based on ordered mesoporous NiO, which were synthesized via the nanocasting route by directly using mesoporous silica as the hard template. A series of mesoporous NiO with different textural parameters such as specific surface area, pore size, pore wall thickness were achieved by selecting mesoporous silica with different pore sizes as templates. The gas sensing properties for formaldehyde (HCHO) of the NiO specimens were examined. The results show that this mesoporous NiO possesses a much higher response to HCHO even at low concentration levels than the bulk NiO, and a larger specific surface area and pore size as well as thinner pore walls would be beneficial for enhancing the sensing properties of NiO.
一类具有高响应的甲醛（HCHO）气体传感器基于有序介孔 NiO 开发而成，该 NiO 通过纳米铸型法直接使用介孔硅作为硬模板合成。通过选择不同孔径的介孔硅作为模板，可以获得具有不同结构参数（如比表面积、孔径、孔壁厚度等）的一系列介孔 NiO。测试了 NiO 样品对甲醛（HCHO）的气体传感性能。结果表明，与体相 NiO 相比，这种介孔 NiO 对 HCHO 即使在低浓度水平下也具有更高的响应，更大的比表面积、孔径以及更薄的孔壁有利于增强 NiO 的传感性能。
