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纳米铁酸锌的冲击波合成及它的光催化活性

DOI: 10.11858/gywlxb.1997.02.003, PP. 90-97

Keywords: 纳米铁酸锌,溶液共沉淀法,光催化脱氢,冲击波合成

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Abstract:

利用溶液共沉淀法制备了纳米氧化锌和三氧化二铁的非常均匀的混合物。通过常规的高温焙烧法和冲击波压缩方法分别合成了铁酸锌。这两种铁酸锌对硫化氢气体的光催化脱氢表现出显著不同的催化活性。试验表明:高温焙烧法合成的铁酸锌是一种颗粒度为几十纳米的结晶完整的化合物;而冲击波合成的铁酸锌是一种颗粒度为几个纳米的非化学计量比化合物,它的光催化活性随着冲击波合成压力的增高而迅速提高。在37GPa时,冲击波合成的铁酸锌对H2S脱氢的光催化活性要比高温焙烧法制备的铁酸锌高出3倍以上。利用粉末X光衍射,透射电镜及电子衍射,Mossbauer谱等分析手段对这两种铁酸锌的晶格结构、细观特征及磁特性进行了表征。

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