The work describes the synthesis of mesoporous α-Fe₂O₃ using two different forms of mesoporous silica MCM-41 and KIT-6 as hard templates employing nanocasting technique. The structural features of fabricated mesoporous α-Fe₂O₃ were studied using small angle X-ray scattering, X-ray diffraction and Fourier transform infrared spectroscopy. Surface properties of the oxides with porous morphology were studied by N₂ sorption isotherms and Brunauer–Emmett–Teller studies, scanning electron microscopy and transmission electron microscopy. The mesoporous α-Fe₂O₃ oxides were then tested for detection of volatile organic compounds namely acetic acid, ethanol and formaldehyde. The α-Fe₂O₃ prepared from KIT-6 shows sensitivity of 45.21 towards acetic acid at temperature of 110 °C, much lower as compared to the temperatures reported in literature with short response and recovery times. The sensitivity obtained for acetic acid is over eight times higher than that for ethanol and formaldehyde making it a potentially selective sensor for acetic acid detection.

中文翻译：

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使用MCM-41和KIT-6作为硬模板用于感测挥发性有机化合物（VOC）的纳米浇铸法合成介孔α-Fe2 O 3纳米结构

工作描述的中孔的α-Fe的合成₂ ö ₃使用两种不同形式的中孔二氧化硅的MCM-41和KIT-6为采用纳米浇铸技术硬模板。的结构特征制造的中孔的α-Fe ₂ ö ₃使用小角度X射线散射，X射线衍射和Fourier变换红外光谱进行了研究。通过N ₂吸附等温线和Brunauer-Emmett-Teller研究，扫描电子显微镜和透射电子显微镜研究了具有多孔形态的氧化物的表面性质。中孔的α-Fe ₂ ö ₃然后测试氧化物，以检测挥发性有机化合物，即乙酸，乙醇和甲醛。所述的α-Fe ₂ ö ₃从45.21 KIT-6示出了灵敏度朝向在110℃的温度下的乙酸制备，低得多的相比，温度与短的响应和恢复时间文献报道。乙酸的灵敏度比乙醇和甲醛的灵敏度高八倍以上，这使其成为用于乙酸检测的潜在选择性传感器。