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The synthesis of nanostructured SiC from waste plastics and silicon powder

机译：由废塑料和硅粉合成纳米结构SiC

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Waste plastics constitute a growing environmental problem. Therefore, the treatment of waste plastics should be considered. Here we synthesize 3C-SiC nanomaterials coexisting with amorphous graphite particles utilizing waste plastics and Si powder at 350-500:C in a stainless steel autoclave. 3C-SiC could be finally obtained after refluxing with aqueous HC1O_4 (70 wt%) at 180 °C. X-ray powder diffraction patterns indicate that the product is 3C-SiC with the calculated lattice constant a = 4.36 A. Transmission electron microscopy (TEM) images show that the SiC samples presented two morphologies: hexagonal platelets prepared by the waste detergent bottles or beverage bottles and nanowires prepared by waste plastic bags respectively. The corresponding selected area electron diffraction (SAED) pattern indicates that either the entire hexagonal platelet or the nanowire is single crystalline. High-resolution TEM shows the planar surfaces of the SiC platelet correspond to {111} planes; the lateral surfaces are { 110} planes and the preferential growth direction of the nanowires is along [1111. The output of SiC was -39% based on the amount of Si powder.
机译：废塑料构成了日益严重的环境问题。因此，应考虑处理废塑料。在这里，我们在不锈钢高压釜中利用废塑料和Si粉在350-500：C的温度下合成了与无定形石墨颗粒共存的3C-SiC纳米材料。与HC1O_4（70 wt％）水溶液在180°C下回流后，最终可以得到3C-SiC。 X射线粉末衍射图表明该产品为3C-SiC，计算出的晶格常数a = 4.36A。透射电子显微镜（TEM）图像显示SiC样品呈现两种形态：由废洗涤剂瓶或饮料制成的六角形血小板分别用废塑料袋制备的瓶子和纳米线。相应的选定区域电子衍射（SAED）模式表明整个六角形血小板或纳米线都是单晶的。高分辨率TEM显示SiC薄片的平面对应于{111}平面;侧面为{110}平面，纳米线的优先生长方向为[1111]。基于Si粉的量，SiC的产量为-39％。

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