Au-Pt海胆状纳米结构的合成研究

发布时间：2018-03-04 06:08

本文选题：Au-Pt　切入点：双金属纳米颗粒　出处：《材料导报》2017年S1期 　论文类型：期刊论文

【摘要】：采用油胺为还原剂和稳定剂,通过晶种生长法制备了Au-Pt海胆状纳米结构,研究了各种合成条件对产物结构及形貌的影响。结果表明,空气气氛下不能合成Au-Pt双金属杂聚体结构;Pt(acac)2和H2PtCl6·6H2O两种Pt前体对于产物形貌没有明显影响;强极性的1-十八烯参与合成反应时不易得到海胆状的双金属结构;不同Au/Pt配比对产物形貌影响的研究指出,Au-Pt海胆状杂聚体结构的形成是因为后还原的Pt会倾向性地沉积到先还原成核的Au纳米颗粒的特定表面。一锅法合成得到了AuPt合金结构,表明后还原的Pt以Au为晶种,在小尺寸效应作用下使颗粒发生纳米尺度的原子扩散形成了带浓度梯度的AuPt合金。
[Abstract]:Au-Pt sea urchin nanostructures were prepared by seed growth with oleamine as reductant and stabilizer. The effects of various synthetic conditions on the structure and morphology of the products were studied. The structure of Au-Pt bimetallic heteropolymer can not be synthesized in the air atmosphere. The precursor of Pt and H _ 2PtCl _ 6 路6H _ 2O have no obvious influence on the morphology of the product, and the strongly polar 1-18 enene is not easy to obtain the bimetallic structure of sea urchin when participating in the synthesis reaction. The effects of different Au/Pt ratios on the morphology of the products indicate that the formation of the structure of Au-Pt sea urchin heteropolymer is due to the tendency of post-reduced Pt to deposit on the specific surface of au nanoparticles firstly reduced to nucleate. The structure of AuPt alloy was obtained by one-pot synthesis. The results show that after reduction of Pt, au is used as seed, and the particles are diffused in nanometer scale to form AuPt alloy with concentration gradient under the action of small size effect.
【作者单位】：宁波检验检疫科学技术研究院;宁波出入境检验检疫局技术中心;中国科学院宁波材料技术与工程研究所;
【基金】：宁波市自然科学基金(2013A610076) 浙江省公益技术应用研究(分析测试)计划项目(2017C37044) 国家质量监督检验检疫总局科技计划项目(2016IK172) 宁波出入境检验检疫局科技计划项目(甬K02-2015;甬K01-2015)
【分类号】：TB383.1

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