采用一种快速高效的光诱导法合成了纳米银三角片,系统地考察了光照时间、柠檬酸钠用量、OH-用量和合成方法对银纳米三角片的合成产率、尖端形貌及其稳定性的影响.研究结果表明,采用光诱导法合成纳米银三角片的最优条件为光照时间3.5 h,反应物物质的量之比nAgNO3∶nNa3C6H3O1∶nNaBHx=1:10:0.8,OH-浓度0.125 mmol·L-1,合成出粒径70～80 nm的纳米银三角片,透射电镜和紫外可见分光光度的表征结果表明:光诱导法相对于直接化学还原法制得的纳米银三角片具有较好的微观形态、产率及稳定性.抗菌测试结果表明三角片形态的纳米银比球型颗粒形态的纳米银具有更优异的抗菌性能.%A facile method was used for synthesis of triangular silver nanoprisms by the photo-mediated methods,which was a considerably simple procedure and relatively low requirements for instruments.Effects of lighting time,the amount of sodium citrate and OH-ions on the yield,uniformity and stability of triangular silver nanoprisms were investigated.The obtained triangular silver nanoprisms were also characterized by TEM and UV-Vis spectra.The optimized photo-mediated prepared conditions for triangular silver nanoprisms were as follows:lighting for 3.5 h,nAgNO3:nNa3C6H5o7∶nNaBH4=1:10∶0.8,and CoH=0.125 mol· L-1.The results of TEM showed that triangular silver nanoprisms were successfully obtained with a diameter distribution of 70～80 rnm.The photomediated method was good for the synthesis of monodisperse high-quality triangular silver nanoprisms than the direct chemical reduction route.Results of antimicrobial activities showed that silver nanoprisms had better antibacterial activity against S.A ureus and E.Coli than spherical particles.
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