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以Na2WO4.2H2O和Zn(NO3)2.6H2O为原料,采用微波水热法在反应体系的pH=7.5合成ZnWO4纳米线。用X射线衍射、场发射扫描电镜、透射电镜、选区电子衍射、高分辨透射电镜及Fourier红外光谱表征ZnWO4纳米线的物相、形貌及结构,研究不同反应时间、反应温度对纳米线结构的影响,研究不同温度合成纳米线的光催化性能。结果表明:延长反应时间、升高反应温度均可使纳米线长大;在200℃、反应60 min合成的ZnWO4纳米线的光催化效果最佳;在紫外-可见光催化反应90 min内,对罗丹明B溶液的降解率达到97%。
Using Na2WO4.2H2O and Zn (NO3) 2.6H2O as raw materials, ZnWO4 nanowires were synthesized by microwave hydrothermal method at a pH of 7.5. The phase, morphology and structure of ZnWO4 nanowires were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, selected area electron diffraction, high resolution transmission electron microscopy and Fourier transform infrared spectroscopy. The effects of different reaction time and reaction temperature on the structure of nanowires Influence, research different temperature synthesis of nanowires photocatalytic performance. The results show that the nanowires grow up when the reaction time is prolonged and the reaction temperature is increased. The best photocatalytic activity of ZnWO4 nanowires synthesized at 200 ℃ for 60 min is the best. Under UV-Vis reaction for 90 min, Ming B solution degradation rate of 97%.