杨梅素纳米银粒子的制备及其对直接染料的催化降解

Synthesis of Myricetin silver nanoparticles and their catalytic degradation on direct dyes

以杨梅素为还原剂,使用生物法制备纳米银粒子。通过测定发现,杨梅素纳米银粒子存在明显的SPR峰,其形貌特征为圆球形。以NaBH_(4)为还原剂,以直接橙26染料为降解对象,测定了不同pH条件下制备的杨梅素纳米银粒子的催化性能。结果表明:在没有催化剂的条件下,NaBH_(4)对直接橙26染料的还原作用有限;添加杨梅素纳米银粒子后,反应30 min后,直接橙26的最高降解率可达到98%。不同pH条件下制备的杨梅素纳米银粒子在粒径和有效浓度上存在明显的差异,在催化降解直接橙26染料时,最小平均粒径的MP2表现出最佳的催化性能。

Silver nanoparticles(AgNPs)are prepared by biological method using Myricetin as a reducing agent.It is found that Myricetin-AgNPs has obvious SPR peak,and their morphology is spherical.The catalytic properties of Myricetin-AgNPs prepared under different pH conditions are determined using NaBH_(4) as a reducing agent and Direct Orange 26 as a degradation object.The results show that the reduction of Direct Orange 26 dye by NaBH_(4) is limited without catalyst.The degradation rate of Direct Orange 26 can reach 98%with the addition of Myricetin-AgNPs and reaction for 30 min.There are obvious differences in the particle size and effective concentration of Myricetin-AgNPs prepared under different pH conditions.MP2 with the minimum average particle size of Myricetin-AgNPs shows the best catalytic performance in the catalytic degradation of Direct Orange 26 dye.