【摘要】 研究了阴离子表面活性剂疏水链的长度对光化学制备金纳米粒子的影响。结果发现 ,疏水链越长 ,获得的金纳米粒子的尺寸越小 ;特别是苯环的引入使诱导和自催化现象越加不明显。在十二烷基磺酸钠体系中获得的金纳米粒子的λmax位于 5 4 0 7nm ,TEM表征的平均粒径为 47 1nm ;十二烷基苯磺酸钠体系的λmax位于 5 2 6 5nm ,平均粒径为 6 7nm。探讨了胶束性质对光化学制备金纳米粒子的影响更多还原

【Abstract】 Gold nanoparticles were prepared by photoreduction of HAuCl 4 through the irradiation of 254nm UV light in the presence of sulphonate surfactant.The effect of hydrophobic chain length on photochemical formation of gold nanoparticles was studied.In the presence of sodium dodecyl sulfate,the average particle size was 47 1nm with the corresponding UV-Vis absorption peak at 540 7nm.In the sodium dodecyl benzene sulfate solution,the average particle size was 6 7nm,absorption peak was determined to be at 526 5nm.The autocatalytic phenomenon and effect of micellar property on particle size were discussed.更多还原