CAJ | 학술논문

以海藻酸钠为还原剂和稳定剂,经紫外光照射 AgNO3溶液在室温下制备出纳米银。通过紫外吸收光谱(UV-Vis)、X 射线衍射(XRD)、红外光谱(FTIR)、透射电镜(TEM)、抑菌实验等对纳米银进行表征。结果表明,照射时间、海藻酸钠和 AgNO3浓度对纳米银生成均有影响。在 AgNO3浓度为1 mmol/L,海藻酸钠浓度为0.5%,反应时间为2 h 时能够生成理想的纳米银。此时生成的银纳米粒子为球形,粒径分布均匀,粒径大小在1~5 nm 之间,对大肠杆菌和金黄色葡萄球菌均有较强的抑菌性。
이해조산납위환원제화은정제,경자외광조사 AgNO3용액재실온하제비출납미은。통과자외흡수광보(UV-Vis)、X 사선연사(XRD)、홍외광보(FTIR)、투사전경(TEM)、억균실험등대납미은진행표정。결과표명,조사시간、해조산납화 AgNO3농도대납미은생성균유영향。재 AgNO3농도위1 mmol/L,해조산납농도위0.5%,반응시간위2 h 시능구생성이상적납미은。차시생성적은납미입자위구형,립경분포균균,립경대소재1~5 nm 지간,대대장간균화금황색포도구균균유교강적억균성。
Nano-silver was prepared by the reduction of AgNO3 under UV irradiation in the presence of sodium alginate as a reducer and stabilizer at room temperature.Nano-silver was characterized by UV-vis spectroscopy,X-ray diffraction (XRD),Fourier transform infrared spectroscopy (FTIR),transmission electron microscopy (TEM),bac-tericidal test,respectively.The effect of reaction conditions such as the UV irradiation time,the concentration of so-dium alginate and AgNO3 in the preparation of silver nanoparticles was studied.The best condition was that the con-centration of AgNO3 and sodium alginate was 1 mmol/L and 0.5%,the irradiation time was 2 h.The result showed that silver nanoparticles had spherical shape and narrow particle size distribution,the average size was about 1-5 nm. The synthesized silver nanoparticles had significant antibacterial activity on E .coli and S .aureus .