In this paper, our effort is focused on preparation and oxygen sensing of fluorescent silicon nanoparticles (Si NPs) assembled in three kinds of mesoporous SBA-15 with different morphologies, including spherical mesoporous SBA-15 (SPSBA-15), long rod-like mesoporous SBA-15 (LRSBA-15) and hexagonal prism-like mesoporous SBA-15 (HPSBA-15). The relationship of structure and sensing properties in mesoporous materials is studied. Small angle powder X-ray diffraction (SAXRD), Fourier transform infrared spectrometer (FT-IR), Brunauer-Emmett-Teller (BET), Discrete-Fourier-Transform (DFT) analyses and X-ray photoelectron spectroscopy (XPS) are used to characterize their structural properties. The obtained mesoporous SPSBA-15, LRSBA-15 and HPSBA-15 possess abundant Si–O–Si bands of the inorganic framework and high surface-volume ratios. Particularly, mesoporous HPSBA-15 materials exhibit the largest surface areas than other two mesoporous materials. Accordingly, the adding volume of Si NPs was 8 ml in mesoporous HPSBA-15. At the same time, the hybrid materials show the shortest response time of 2.2 s and recovery time of 11.2 s. This result can be attributed to the uniform and nearly parallel porous structure of the HPSBA-15 materials supporting with large surface areas and narrow pore size distributions. Therefore, the properties in oxygen sensing can be improved by using mesoporous SBA-15 materials with larger BET surface area.

在本文中，我们的工作重点是在三种不同形态的中孔SBA-15中组装的荧光硅纳米颗粒（Si NPs）的制备和氧传感，包括球形中孔SBA-15（SPSBA-15），长棒状中孔SBA-15（LRSBA-15）和六棱柱状中孔SBA-15（HPSBA-15）。研究了介孔材料的结构与传感性能之间的关系。使用小角度粉末X射线衍射（SAXRD），傅立叶变换红外光谱仪（FT-IR），Brunauer-Emmett-Teller（BET），离散傅里叶变换（DFT）分析和X射线光电子能谱（XPS）表征其结构特性。所得的中孔SPSBA-15，LRSBA-15和HPSBA-15具有丰富的无机骨架Si-O-Si带，并且具有高的表面体积比。尤其，中孔HPSBA-15材料比其他两种中孔材料具有最大的表面积。因此，在中孔HPSBA-15中Si NP的添加量为8ml。同时，混合材料显示最短的响应时间为2.2 s，恢复时间为11.2 s。该结果可归因于HPSBA-15材料的均匀且几乎平行的多孔结构，具有大的表面积和狭窄的孔径分布。因此，通过使用具有较大BET表面积的中孔SBA-15材料可以改善氧感测的性能。2秒，恢复时间为11.2秒。该结果可归因于HPSBA-15材料的均匀且几乎平行的多孔结构，具有大的表面积和狭窄的孔径分布。因此，通过使用具有较大BET表面积的中孔SBA-15材料可以改善氧感测的性能。2秒，恢复时间为11.2秒。该结果可归因于HPSBA-15材料的均匀且几乎平行的多孔结构，具有大的表面积和狭窄的孔径分布。因此，通过使用具有较大BET表面积的中孔SBA-15材料可以改善氧感测的性能。