Departamento de Ingeniería de Proyectos, Centro Universitario de Ciencias Exactas e Ingenierías (CUCEI), Universidad de Guadalajara, Guadalajara 44410, Mexico.
Departamento de Química, Centro Universitario de Ciencias Exactas e Ingenierías (CUCEI), Universidad de Guadalajara, Guadalajara 44410, Mexico.
Sensors (Basel). 2018 Jul 16;18(7):2299. doi: 10.3390/s18072299.
Nanoparticles of manganese antimonate (MnSb₂O₆) were prepared using the microwave-assisted colloidal method for its potential application as a gas sensor. For the synthesis of the oxide, manganese nitrate, antimony chloride, ethylenediamine and ethyl alcohol (as a solvent) were used. The precursor material was calcined at 800 °C in air and analyzed by X-ray diffraction. The oxide crystallized into a hexagonal structure with spatial group P321 and cell parameters a = b = 8.8054 Å and c = 4.7229 Å. The microstructure of the material was analyzed by scanning electron microscopy (SEM), finding the growth of microrods with a size of around ~10.27 μm and some other particles with an average size of ~1.3 μm. Photoacoustic spectroscopy (PAS) studies showed that the optical energy band () of the oxide was of ~1.79 eV. Transmission electron microscopy (TEM) analyses indicated that the size of the nanoparticles was of ~29.5 nm on average. The surface area of the powders was estimated at 14.6 m²/g by the Brunauer⁻Emmett⁻Teller (BET) method. Pellets prepared from the nanoparticles were tested in carbon monoxide (CO) and propane (C₃H₈) atmospheres at different concentrations (0⁻500 ppm) and operating temperatures (100, 200 and 300 °C). The pellets were very sensitive to changes in gas concentration and temperature: the response of the material rose as the concentration and temperature increased. The results showed that the MnSb₂O₆ nanoparticles can be a good candidate to be used as a novel gas sensor.
采用微波辅助胶体法制备了锰锑酸盐（MnSb₂O₆）纳米粒子，因其在气体传感器方面的潜在应用而受到关注。为了合成氧化物，使用了硝酸锰、三氯化锑、乙二胺和乙醇（作为溶剂）。前驱体材料在空气中于 800°C 下煅烧，并通过 X 射线衍射进行分析。氧化物结晶为具有空间群 P321 和晶胞参数 a = b = 8.8054 Å 和 c = 4.7229 Å 的六方结构。通过扫描电子显微镜（SEM）分析材料的微观结构，发现生长有大小约为10.27 μm 的微棒和一些平均大小约为1.3 μm 的其他颗粒。光声光谱（PAS）研究表明，氧化物的光学能带（Eg）约为1.79 eV。透射电子显微镜（TEM）分析表明，纳米粒子的平均尺寸约为29.5 nm。通过 Brunauer⁻Emmett⁻Teller（BET）方法估算粉末的比表面积为 14.6 m²/g。由纳米粒子制备的压片在不同浓度（0⁻500 ppm）和工作温度（100、200 和 300°C）下在一氧化碳（CO）和丙烷（C₃H₈）气氛中进行了测试。压片对气体浓度和温度的变化非常敏感：随着浓度和温度的升高，材料的响应会增强。结果表明，MnSb₂O₆ 纳米粒子可能是一种新型气体传感器的良好候选材料。
