文章摘要
苏文,杨辉.柠檬提取液生物合成纳米硒及其抗氧化性[J].精细化工,2020,37(11):
柠檬提取液生物合成纳米硒及其抗氧化性
Biosynthesis and its Antioxidant Activity of Nano-selenium by Lemonade Extract
投稿时间:2020-05-31  修订日期:2020-07-15
DOI:
中文关键词: 柠檬提取液  纳米硒  抗氧化性  功能材料
英文关键词: lemon extract  nano-selenium  antioxidant property  functional materials
基金项目:陕西省科技成果转移推广项目
作者单位E-mail
苏文 陕西科技大学 1026262363@qq.com 
杨辉 陕西科技大学 yangh@sust.edu.cn 
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中文摘要:
      以柠檬提取液为原料生物合成纳米硒,借助UV-Vis技术跟踪纳米硒的形成过程,采用XRD对纳米硒化学组成和结构进行表征,SEM观察其表面形貌,用粒径仪测定纳米粒径,利用FTIR分析纳米硒表面与生物分子的化学作用,并对制备的纳米硒清除超氧阴离子自由基、羟自由基和DPPH自由基的作用进行检验。结果表明,当pH=10时,柠檬提取液可还原50 mmol/L的亚硒酸生成无定形态纳米硒,反应时间不同,所得纳米硒粒径也不同,1 h时合成纳米硒粒径介于78.8~122.4 nm、2 h时粒径介于164.2~295.3 nm,呈球形,分散性较好;柠檬水提液既是合成纳米硒的还原剂又是稳定剂,其生物分子与纳米硒表面的化学作用是纳米硒稳定存在的基础;纳米硒的抗氧化活性与浓度呈正相关,对比研究表明抗氧化性强弱顺序为:Vc>小尺寸纳米硒>大尺寸纳米硒。
英文摘要:
      Nano-selenium is biosynthesized using lemon extract as a raw material. The formation process of nano-selenium is tracked by UV-Vis technology, the chemical composition and structure of the synthesized nano-selenium are characterized by XRD, the surface morphology is observed by SEM, and the nano-particle size is determined by a particle size analyzer. FTIR was used to analyze the chemical interaction between the nano-selenium surface and biomolecules. The scavenging abilities of the prepared nano-seleniumon on superoxide anion free radicals, hydroxyl free radicals and DPPH free radicals were examined. It was found that at pH = 10, the lemon extract can reduce 50 mmol / L selenite to produce amorphous selenium nanoparticles. The particle size of the synthesized nano-selenium is between 78.8~122.4 nm at 1 h. At 2 h, the particle size of nano-selenium is between 164.2~295.3 nm, which is spherical and has good dispersion; the lemon water extract is used both as a reducing agent and as a stabilizer for synthesizing nano-selenium. The essential reason is the chemical action between the biomolecule and the nano-selenium surface. Nano-selenium shows antioxidant activity positively correlated with concentration. Comparative studies show that the antioxidant strength is in order of vitamin C> small-sized nano-selenium> large-sized nano-selenium.
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