铂纳米微粒的微波高压液相合成及光谱特性研究  

Microwave High-pressure Synthesis of Pt Nanoparticles and Its Resonance Scattering Spectra

作　　者：罗杨合[1] 蒋治良[1] 刘凤志[1] 

机构地区：[1]广西师范大学材料科学与工程研究所,广西桂林541004

出　　处：《贵金属》2003年第2期19-23,共5页Precious Metals

基　　金：广西自然科学基金资助项目 ( 0 14 40 3 )

摘　　要：以柠檬酸钠作还原剂、聚丙烯酰胺作稳定剂 ,采用微波高压液相合成法制备了稳定的液相铂纳米粒子。TEM表明 ,铂纳米粒子呈球形 ,粒径约为 1 0nm。光谱分析表明聚丙烯酰胺在 2 1 6nm处有一个吸收峰 ;铂纳米粒子体系在紫外可见光波长范围内无吸收峰 ,随着波长的降低其吸收增大 ;浓度低于 8 0× 1 0 - 4 mol/LPt的铂纳米粒子体系在 40 0nm ,470nm、 5 1 0nm和 940nm产生 4个共振散射峰。The Pt nanoparticles in diameter of 10 nm were prepared by microwave high-pressure procedure,using sodium citrate as a reducer to reduce Pt(Ⅳ)to small Pt nanoparticle and polyacrylamide(PAM)as a stabilizer for the particles.TEM showed that the Pt nanoparticles exhibit spherical shape.An absorption peak at 216 nm for PAM and none of absorption peaks for Pt particles in the range of 200-800nm were observed.The absorption value increased with the wavelength decreasing.Four resonance scattering peaks at 400nm,470nm,510nm and 940nm for the Pt nanoparticles occurred when its concentration is less than 8 0×10 -4 mol/L Pt.

关 键 词：铂纳米微粒 柠檬酸钠 聚丙烯酰胺 微波高压液相合成 共振散射光谱 

分 类 号：TG146.33[一般工业技术—材料科学与工程] TB383[金属学及工艺—金属材料]