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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Mechanochemical synthesis of nanocrystalline ZnWO_4 at room temperature
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Mechanochemical synthesis of nanocrystalline ZnWO_4 at room temperature

机译：室温下机械化学合成纳米晶ZnWO_4

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摘要

Single nanocrystalline ZnWO_4 powders were successfully synthesized by ball milling at room temperature. A stoichiometric mixture of ZnO and WO_3 in a 1:1 molar ratio was subjected to intense mechanical treatment in air using a planetary ball mill (Fritsch - Premium line - Pulversette No. 7) for a period varying from 5 to 300 min. The influence of the four different milling conditions was investigated on the formation of ZnWO_4. The products obtained were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmer-Teller (BET) surface area, infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS). The synthesis of ZnWO_4 powder started after 5 min milling time and finished after 30 min milling time at a higher speed (1000 rpm). The mechanical treatment up to 300min did not lead to phase and structure change of ZnWO_4. The product obtained contained nanoparticles with a size of about 50 nm. The photocatalytic activity of the ZnWO_4 powders obtained was investigated by degradation of a model aqueous solution of Malachite Green (MG) upon UV-light irradiation.
机译：通过在室温下球磨成功地合成了单纳米晶体ZnWO_4粉末。使用行星式球磨机（Fritsch-Premium系列-Pulversette No. 7）在空气中对1：1摩尔比的ZnO和WO_3的化学计量混合物进行了强烈的机械处理，时间为5至300分钟。研究了四种不同研磨条件对ZnWO_4形成的影响。通过X射线衍射（XRD），透射电子显微镜（TEM），Brunauer-Emmer-Teller（BET）表面积，红外（IR）光谱和X射线光电子能谱（XPS）对所得产物进行表征。 ZnWO_4粉末的合成在5分钟的研磨时间后开始，并在30分钟的研磨时间后以较高的速度（1000 rpm）完成。长达300min的机械处理不会导致ZnWO_4的相和结构变化。获得的产物含有尺寸为约50nm的纳米颗粒。通过在紫外光照射下降解孔雀石绿（MG）的模型水溶液来研究所得ZnWO_4粉末的光催化活性。

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