高等学校化学学报2017，Vol.38Issue(11)：1921-1926,6.DOI:10.7503/cjcu20170145
尺寸比例可调的Au-Ni双金属纳米颗粒的制备
Synthesis of Au-Ni Bimetallic Nanoparticles with Tunable Aspect Ratio
摘要
Abstract
In this paper, the Au-Ni bimetallic nanoparticles with tunable aspect ratio of Au to Ni were synthe-sized by noble-metal-induced-reduction strategy. Octadecylamine is reducible at high temperatures thus it was used as a reducing agent. As the temperature increased gradually, Au3+was reduced by octadecylamine to form Au0 . After that, Ni2+ was reduced to Ni0 by obtaining electrons from Au0 at 220 ℃. Octadecylamine provided electrons to Au3+ continuously during the reaction. The size of Ni side could be tunable by changing the reaction time at 220 ℃. Au side and Ni side could be selectively etched with aqueous I2/KI and 0. 5%( mass fraction) aqueous HCl, respectively. The size of Au-Ni bimetallic nanoparticles could be tuned continuously by etching for varied time. Au side or Ni side could be completely etched separately, remaining Ni nanoparticles or Au nanoparticles. The fresh surface obtained after etching Au side or Ni side provided a site of chemical reaction for further compositing functional substances. This method is attractive owing to the easiness to continuously tuning aspect ratio of the bimetallic nanoparticles. On the other hand, composition of the bimetallic nanoparticles is also flexibly tunable using different reactants.关键词
双金属纳米颗粒/反应时间/选择性刻蚀/结构调控Key words
Bimetallic nanoparticles/Reaction time/Selectively etching/Morphology control分类
化学化工引用本文复制引用
韩天昊,梁福鑫,杨振忠..尺寸比例可调的Au-Ni双金属纳米颗粒的制备[J].高等学校化学学报,2017,38(11):1921-1926,6.基金项目
国家自然科学基金(批准号:51233007)资助.Supported by the National Natural Science Foundation of China( No.51233007) . （批准号:51233007）
