Hu Xiaoge, Wang Tie, Dong Shaojun
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Science, Jilin.
J Nanosci Nanotechnol. 2006 Jul;6(7):2056-61. doi: 10.1166/jnn.2006.351.
We report the synthesis of hexadecyltrimethylammonium bromide (CTAB)-stabilized cubic Pt nanoparticles by NaBH4 reduction of H2PtCl6 in aqueous CTAB solution. These Pt nanoparticles (average size of 7 nm) were well dispersed in aqueous solution and stable at least for 2 months. Addition of a trace amount of AgNO3 can alter the morphology of these Pt nanoparticles. More interestingly, the as-prepared uniform Pt nanoparticles were further developed into bigger Pt nanoagglomerates (approximately 20 to 47 nm) by a seed-mediate growth process. Dentritic and spherical Pt nanoagglomerates can be synthesized by altering the incubation time and their size can be tuned by controlling the amount of the seeds added.
我们报道了通过在十六烷基三甲基溴化铵（CTAB）水溶液中用硼氢化钠还原氯铂酸（H2PtCl6）来合成CTAB稳定的立方铂纳米颗粒。这些铂纳米颗粒（平均尺寸为7纳米）在水溶液中分散良好，并且至少稳定2个月。添加痕量的硝酸银可以改变这些铂纳米颗粒的形态。更有趣的是，通过种子介导生长过程，所制备的均匀铂纳米颗粒进一步发展成更大的铂纳米团聚体（约20至47纳米）。通过改变孵育时间可以合成树枝状和球形的铂纳米团聚体，并且可以通过控制添加的种子量来调节它们的尺寸。
