SDS-PVP体系中镍溶胶的紫外可见光谱特性

UV-Vis spectra of the nickel sols in aqueous solution of SDS-PVP

在十二烷基硫酸钠(SDS)-聚乙烯吡咯烷酮(PVP)体系中,采用水合肼还原氯化镍制得镍溶胶,利用紫外-可见光谱(UV-Vis)手段监测反应过程并考察其最大吸收波长位置及吸光度的变化规律,结果发现,镍溶胶的UV-Vis光谱中最大吸收波长位置随生成镍粉粒径的减小发生蓝移,吸光度随生成粒子浓度增大而增大.

Nickel sols were prepared from nickel chloride reduced by hydrazine in aqueous solution of sodium dodecyl sulfate（SDS）-polyvinylpyrrolidone（PVP）.UV-Vis spectra were employed to monitor the reaction process and the change of the max absorption peak and its absorbency were investigated.It was found that the max absorption peak in the UV-Vis spectras of nickel sols was blue-shifted with the decreasing of ultrafine nickel powders average diameter and its absorbency increased with the increasing of the .particles＇ concentration.