论文部分内容阅读
选用TX-100/环己烷/正己醇/水反相微乳体系,以Ag NO_3为Ag源、Na_2S·9H2O为S源、L-半胱氨酸为结构导向剂,室温下制备了高晶化度、直径为10—50 nm的Ag_2S纳米晶,并考察了影响其粒径大小的因素。紫外-可见吸收光谱表明,Ag_2S纳米晶在290 nm处呈现强吸收,与体相Ag2S(1 240 nm)相比,其吸收边发生了明显的蓝移。通过调控微乳体系中ω0(水与表面活性剂物质的量比)、Ag+与L-半胱氨酸的物质的量比、反应物浓度等可以实现对产物尺寸和形貌的调控。
The reversed-phase microemulsion system of TX-100 / cyclohexane / n-hexanol / water was used. AgNO 3 as Ag source, Na 2 S · 9H 2 O as S source and L-cysteine as structure- Degree, diameter of 10-50 nm of Ag_2S nanocrystals, and investigated the factors that affect the size of their size. The results of UV-vis absorption spectra show that Ag 2 S nanocrystals exhibit strong absorption at 290 nm, and a significant blue shift occurs at the absorption edge compared with bulk Ag 2 S (1 240 nm). Through the regulation of the microemulsion system ω0 (water to surfactant ratio), Ag + and L-cysteine ratio of substances, the concentration of reactants can be achieved on the size and morphology of the product.