采用干法室温振动研磨的方法制备纳米Zn粉,纳米Zn水解制备纳米Zn/ZnO复合结构.光催化实验证明在太阳光和紫外光照射时,纳米Zn/ZnO复合结构具有优良的光催化性能.TEM检测表明,经11h研磨的Zn粉粒度分布在10～20nm之间,纳米Zn水解反应生成的固相产品,纳米ZnO与未完全反应的纳米Zn构成棒状与片状共存的独特结构,XRD分析表明产物中仅含有Zn和ZnO两种物质;UV-Vis谱显示纳米Zn/ZnO复合体在可见光区的吸收强度明显高于纳米ZnO颗粒,颗粒尺寸减小引起激子吸收峰蓝移,与体相材料相比纳米颗粒有更高的光催化氧化-还原能力.
Zn nano-particles were prepared by a dry roller vibration milling at room temperature,and Zn/ZnO nano-composite was manufactured by hydrolyzing Zn nano-particles.The Zn/ZnO nano-composite exhibited much better photo-catalytic performance under the sun and ultraviolet light irradiation.TEM and XRD analysis showed that Zn particles size was 10-20nm after 11h milling,and the solid product of the hydrolysis had a blended morphology of nano-rods and nano-flakes.UV-vis spectra indicated that the absorption strength of the Zn/ZnO nano-composite much more exceeds that of the ZnO nano-particles in visible light zone,and particle size reduction causes the exciton peak blue shift,then nano-particles perform much better than bulk materials in the degradation process.
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