纳米银的制备及吸收光谱分析  

Preparation and absorption spectroanalysis of silver nanoparticles

作　　者：荣先国[1] 张怀斌[2] 刘文波[3] 

机构地区：[1]滨州医学院烟台校区分析实验室,山东烟台264003 [2]滨州医学院烟台校区化学教研室,山东烟台264003 [3]滨州医学院烟台校区实验中心,山东烟台264003

出　　处：《化学试剂》2010年第12期1114-1116,1126,共4页Chemical Reagents

摘　　要：制备出了具有纳米尺寸的纳米银,探讨了在电解质和聚乙烯吡咯烷酮(PVP)环境中纳米银的吸收光谱。实验发现:电解质对纳米银的吸收光谱均有不同程度的影响,而且对纳米银特征峰的影响是阴阳粒子共同作用的结果;Cl-对纳米银的影响比Br-、I-大;二价阳离子比一价阳离子对纳米银吸收光谱的影响要大的多;PVP会影响纳米银粒子的光谱性质。The silver nanoparticles were prepared successfully.The interactions between the electrolytes and silver nanoparticles were investigated by using UV-visible spectroscopic method.The analytical results indicated that the stronger action among the electrolyte ions and silver nanoparticles led to the formation of large particles and aggregates in the solution.The influence of chloride ions on the nanosilver spectrogram was stronger than bromide ions and iodine ions.The different metal salts in combination with Cl-used as the anion were adopted for investigating the spectra of silver nanoparticles.The nano-silver sol exhibited a different spectral behavior when various metal ions were introduced.The effect of electrolytes on the aggregation of silver nanoparticles decreased in the following order：ZnCl2 MgCl2KCl NaCl.The spectral property of silver nanoparticles was influenced by PVP.

关 键 词：纳米银 吸收光谱 电解质 

分 类 号：O648.12[理学—物理化学]