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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Solvothermal synthesis of Ag/ZnO and Pt/ZnO nanocomposites and comparison of their photocatalytic behaviors on dyes degradation
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Solvothermal synthesis of Ag/ZnO and Pt/ZnO nanocomposites and comparison of their photocatalytic behaviors on dyes degradation

机译：溶剂热合成Ag / ZnO和Pt / ZnO纳米复合材料及其对染料降解的光催化性能比较

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摘要

Noble metal/ZnO nanoparticles were synthesized by a solvothermal method. The influence of reaction time, noble metal presence or kind of noble metal (Ag or Pt) was evaluated. The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS) and BET surface area analysis. Hexagonal wurtzite and fcc were obtained for crystalline structures for ZnO and Ag/Pt, respectively. No characteristic phases which correspond to crystalline impurities were detected. It was displayed that ZnO nanoparticles presented nanowire morphology (NWs), while the metallic silver or platinum were found taking on quasi-spherical nanoparticles morphology (NPs), which appeared well dispersed onto ZnO NWs surface. Regarding particle sizes, ZnO aspect ratios were 2.5-13.3, Ag and Pt diameters were 17.3-24.3 nm and around approximate to 6.3 nm, respectively. The photocatalytic behavior of the synthesized systems was studied as well by the removing reaction of methylene blue (MB) in water solution. It was verified that the increase of the photocatalytic activity was due to the noble metal presence, exhibiting higher effect of silver than platinum. Photocatalytic results (all samples reached >70% MB elimination) demonstrated the viability of the noble metal/ZnO nanocomposites synthesized by solvothermal method for usage in environmental applications. (C) 2016 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
机译：通过溶剂热法合成了贵金属/ ZnO纳米粒子。评价反应时间，贵金属的存在或贵金属种类（Ag或Pt）的影响。通过X射线衍射（XRD），扫描电子显微镜（SEM），透射电子显微镜（TEM），紫外可见漫反射光谱（DRS）和BET表面积分析对制备的样品进行表征。分别获得了六方纤锌矿和fcc的ZnO和Ag / Pt的晶体结构。没有检测到对应于结晶杂质的特征相。结果表明，ZnO纳米颗粒具有纳米线的形貌（NWs），而金属银或铂具有准球形的纳米颗粒形貌（NPs），并很好地分散在ZnO NWs表面。关于粒径，ZnO的长径比为2.5-13.3，Ag和Pt的直径分别为17.3-24.3nm和约6.3nm左右。还通过水溶液中亚甲基蓝（MB）的去除反应研究了合成体系的光催化行为。证实了光催化活性的增加归因于贵金属的存在，与铂相比，银具有更高的银作用。光催化结果（所有样品均达到> 70％MB消除）证明了通过溶剂热法合成的贵金属/ ZnO纳米复合材料在环境应用中的可行性。 （C）2016日本粉末技术学会。由Elsevier B.V.和日本粉末技术学会出版。版权所有。

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