In recent years, it is urgent and challenging to prepare highly sensitive and stable formaldehyde metal oxide gas sensing materials, as to in-situ detecting the indoor air pollutant. Here, stoichiometric InOCl mesoporous nanomaterial was synthesized by a facile sol-gel and successive calcination method. The dosage of HCl was found to be the key parameter for the stoichiometry of the InOCl, which was polycrystalline with mesopores of about 1.87 nm, as characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), N₂ adsorption–desorption and X-ray photoelectron spectroscopy (XPS). Importantly, when used as formaldehyde gas sensor, it shows a high response of 45 to 50 ppm HCHO with response/recovery time of 18 s and 47 s at a low working temperature of 200 °C. In the meanwhile, it also exhibits high selectivity over other interfering gases such as 50 ppm ethanol, acetone, benzene and toluene, and good stability during 16 days gas sensing test. All these results show the promise of this mesoporous material for high performance formaldehyde gas sensing applications.

近年来，制备高灵敏度和稳定的甲醛金属氧化物气体传感材料以现场检测室内空气污染物是迫在眉睫的。在此，通过简便的溶胶-凝胶法和连续煅烧法合成了化学计量的InOCl介孔纳米材料。通过X射线粉末衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜表征，发现HCl的剂量是InOCl化学计量的关键参数，InOCl是具有约1.87 nm介孔的多晶体。 （TEM），N ₂吸附-解吸和X射线光电子能谱（XPS）。重要的是，当用作甲醛气体传感器时，在200°C的低工作温度下，它显示出45至50 ppm HCHO的高响应，响应/恢复时间分别为18 s和47 s。同时，它对其他干扰气体（如50 ppm乙醇，丙酮，苯和甲苯）也具有很高的选择性，并且在16天的气敏测试中具有良好的稳定性。所有这些结果表明，该介孔材料有望用于高性能甲醛气体传感应用。