您的位置:首页  > 论文页面

纳米银粒子的制备及其对抗氧化剂2-叔丁基对甲酚的检测

发表时间:2015-05-15  浏览量:1506  下载量:468
全部作者: 王鹤,张国文
作者单位: 南昌大学食品科学与技术国家重点实验室
摘 要: 在保护剂聚乙烯吡咯烷酮(polyvinyl pyrrolidone,PVP)存在的条件下,以2-叔丁基对甲酚(2-tert-butyl-4-methylphenol,TBMP)为还原剂,将AgNO3还原制备纳米银粒子,并考察反应时间、温度、NaOH浓度、PVP浓度、AgNO3浓度对纳米银粒子生成的影响。实验结果表明:温度为75℃,NaOH浓度为2.4×10^4 mol·L^1,PVP浓度为2.6×10^4 mol·L^1,AgNO3浓度为1.4×10^4 mol·L^1的条件下最有利于纳米银粒子的生成。利用扫描电镜(scanning electron microscope,SEM)对生成的纳米银粒子进行形貌和尺寸表征,结果表明:在保护剂存在下,此方法制备的纳米银粒子分散性较好,粒径较小,分布均匀。生成的纳米银粒子在400~450 nm具有较强的吸收,光谱强度与抗氧化剂TBMP的浓度成正比,将纳米银粒子的这一特性用于定量测定TBMP,检出限为0.21 mg·L^1.
关 键 词: 食品科学技术基础学科;纳米银;2-叔丁基对甲酚;化学还原法;定量应用
Title: Sliver nanoparticles preparation and detection of antioxidant 2-tert-butyl-4-methylphenol
Author: WANG He, ZHANG Guowen
Organization: State Key Laboratory of Food Science and Technology, Nanchang University
Abstract: Silver nanoparticles were prepared using AgNO3 and 2-tert-butyl-4-methylphenol (TBMP) as reducer under the existence of protecting reagent polyvinyl pyrrolidone (PVP). The experimental conditions including reaction time, temperature and the concentrations of NaOH, PVP and AgNO3 were studied. The results indicate that the temperature of 75℃ and the concentrations of NaOH at 2.4×10^4 mol·L^1, PVP at 2.6×10^4 mol·L^1 and AgNO3 at 1.4×10^4 mol·L^1 were the optimum to synthesize the nanoparticles. The silver nanoparticles characterized by scanning electron microscope (SEM) show that the nanoparticles were spherical shape and exhibit better properties such as dispersed well, smaller particle size, and uniform distribution. It is found that the silver nanoparticles had an UV-visstrong absorbance band in the range of 400~450 nm, and the concentration of the antioxidant TBMP is proportional to the spectral intensity. The absorbance of silver nanoparticles is used to the quantitative determination of TBMP, which the detection limit is 0.21 mg·L^1.
Key words: basic subject of food science and technology; silver nanoparticle; 2-tert-butyl-4-methylphenol; chemical reduction; quantitative application
发表期数: 2015年5月第9期
引用格式: 王鹤,张国文. 纳米银粒子的制备及其对抗氧化剂2-叔丁基对甲酚的检测[J]. 中国科技论文在线精品论文,2015,8(9):984-989.
 
0 评论数 0
暂无评论
友情链接