Synthesis and Characterization of Nano-Tungsten Oxide Precipitated onto Natural Inorganic Clay for Humidity-Sensing Applications
Synthesis and Characterization of Nano-Tungsten Oxide Precipitated onto Natural Inorganic Clay for Humidity-Sensing Applications
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DOI：
10.3390/ceramics1010010
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发表时间：
2018-09-01
影响因子：
2.8
通讯作者：
Tulliani, Jean-Marc
中科院分区：
文献类型：
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作者：
Afify, Ahmed S.;Elsayed, Ahmed;Tulliani, Jean-Marc
以四氯化钨和天然微纤维无机粘土（海泡石）为原料，采用湿化学法制备氧化钨纳米颗粒。考虑到海泡石在自然界中具有丰富的储量和可实现的有益环境应用，研究了在基本条件下氧化钨在海泡石上的沉淀和随后的热处理。采用激光粒度测定、x射线衍射、场发射扫描电镜（FE-SEM）、能量色散x射线能谱（EDX）和高分辨率透射电镜（HR-TEM）等技术对制备样品的粒度分布、形貌和组成进行了研究。我们的研究结果表明，在改性海泡石的针状结构上存在小于50纳米的氧化钨纳米颗粒。
A wet chemical method was used to obtain tungsten oxide nanoparticles from tungsten tetrachloride and natural microfibrous inorganic clay (sepiolite) as a starting material. Precipitation of tungsten oxide species onto sepiolite under basic conditions and subsequent thermal treatment was investigated, prompted by the abundance of sepiolite in nature and the useful environmental applications that could be attained. Laser granulometry, X-ray diffraction, field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDX), and high-resolution transmission electron microscopy (HR-TEM) techniques were used to study the particle-size distribution, the morphology, and the composition of the prepared sample. Our findings show the presence of tungsten oxide nanoparticles, which are less than 50 nm, on the needles of the modified sepiolite.