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Synthesis and photocatalytic performance of quasi-fibrous ZnO

机译:准纤维状ZnO的合成及光催化性能

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The combustion of oxidizer zinc nitrate and fuel oxalic acid results in quasi-fibrous zinc oxide. The processing parameters including oxidizer to fuel ratio, time and temperature were optimized for the resultant crystal structure and morphology. Pure hexagonal phase formation does not depend on the fuel ratio, but a stoichiometric ratio of oxidizer to fuel at 450 degrees C and 30 min results in highly crystalline ZnO with 3 mu m length and 0.5 mu m width. This quasi-fiber originates from partial fusion of near spherical, similar to 60 nm particles during the rapid rate of reaction in the combustion process. Transmission electron microscopic analysis confirms the anisotropic primary particle orientation and pore distribution within the developed quasi-fibrous particles. The degradation of methyl orange was assessed by degrading the dye in the presence of the synthesized ZnO (2.95 eV) under both UV and visible light. Quasi-fibrous zinc oxide exhibits effective photocatalytic efficiency under visible light irradiation.
机译:氧化剂硝酸锌和燃料草酸的燃烧产生准纤维状氧化锌。针对所得到的晶体结构和形态优化了包括氧化剂与燃料比,时间和温度在内的工艺参数。纯粹的六方相的形成不取决于燃料比,但是氧化剂与燃料在450摄氏度和30分钟的化学计量比会产生高度结晶的ZnO,其长度为3μm,宽度为0.5μm。这种准纤维起源于近球形的部分融合,类似于在燃烧过程中快速反应过程中的60 nm粒子。透射电子显微镜分析证实了在发育的准纤维颗粒内各向异性的初级颗粒取向和孔分布。在紫外光和可见光下,在合成的ZnO(2.95 eV)存在下,通过降解染料来评估甲基橙的降解。准纤维状氧化锌在可见光照射下表现出有效的光催化效率。

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