A. Kytsya, L. Bazylyak, O. Pobigun-Halaiska, I. Opeida, P. Simon, I. Zelenina
{"title":"Synthesis and Catalytic Properties of Ni©Ag Bimetallic Nanostructures","authors":"A. Kytsya, L. Bazylyak, O. Pobigun-Halaiska, I. Opeida, P. Simon, I. Zelenina","doi":"10.1109/NAP.2018.8915129","DOIUrl":null,"url":null,"abstract":"Magnetic bimetallic Ni©Ag nanostructures have been synthesized by cementation of silver with nickel nanoparticles at different starting ratios Ni/Ag. It was found that the obtained precipitates are well separated from the reaction mixture by applying an external magnetic field without any losses of the target products. Kinetics of the cementation was monitored by direct potentiometry technique and it was observed that the atomic ratios of Ni/Ag in the obtained products do not depend on the starting concentration of Ag+. Using transmission electron microscopy, it was found that at a low concentration of Ag+in the reaction mixture silver crystallized in the form of nanoplates and at high concentration of Ag+ the formation of silver rods was observed. In addition, the plate-like Ni©Ag nanostructures have been tested as possible catalysts for oxidation of organic substrates with molecular oxygen. It was found that the addition of Ni©Ag to the reaction mixture accelerates the reaction of the initiated liquid-phase solvent free oxidation of cumene by 1.4 – 2 times.","PeriodicalId":239169,"journal":{"name":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NAP.2018.8915129","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Ni©Ag双金属纳米结构的合成及其催化性能
以不同的Ni/Ag起始比,将银与纳米镍胶结,合成了磁性双金属Ni©Ag纳米结构。结果表明,在外加磁场作用下,得到的沉淀物能很好地从反应混合物中分离出来,而目标产物没有任何损失。通过直接电位法监测了胶结动力学,观察到所得产物中Ni/Ag的原子比不依赖于Ag+的起始浓度。通过透射电镜观察发现,在反应混合物中Ag+浓度低时,银以纳米板的形式结晶,Ag+浓度高时,银棒的形成。此外,片状Ni©Ag纳米结构已被测试作为有机底物与分子氧氧化的可能催化剂。结果表明,在反应混合物中加入Ni©Ag可使异丙苯的液相无溶剂氧化反应加速1.4 ~ 2倍。
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