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现代化工  2021, Vol. 41 Issue (10): 238-242    DOI: 10.16606/j.cnki.issn0253-4320.2021.10.049
  分析测试 本期目录 | 过刊浏览 | 高级检索 |
L型半胱氨酸保护合成纳米金簇及检测水中Cu2+的研究
凌洁1,2, 李瑞琪1, 吴晗2, 曹潘3
1. 陕西能源职业技术学院煤炭与化工产业学院, 陕西 咸阳 712000;
2. 西安科技大学化学与化工学院, 陕西 西安 710054;
3. 西安石油大学化学化工学院, 陕西 西安 710065
Synthesis of gold nanoparticles protected by L-cysteine and usage in determination of Cu2+ in water samples
LING Jie1,2, LI Rui-qi1, WU Han2, CAO Pan3
1. College of Coal and Chemical Industry, Shaanxi Energy Institute, Xianyang 712000, China;
2. College of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an 710054, China;
3. College of Chemistry & Chemical Engineering, Xi'an Shiyou University, Xi'an 710065, China
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摘要 以氯金酸(HAuCl4)为金原子前驱体、半胱氨酸(L-Cys)为还原剂和保护剂,在60℃、8 h下采用"一步法"合成荧光性强、分散性好的金纳米簇(L-Cys-AuNCs),考察了金纳米簇的稳定性及对水中Cu2+的荧光响应规律。实验表明,L-Cys-AuNCs置于80 mmol/L NaCl溶液中25 d内不老化,化学稳定性好;L-Cys-AuNCs探针对Cu2+的选择性好,不受水体中常见阳离子的干扰,与Cu2+的荧光响应快,稳定时间短;L-Cys-AuNCs探针荧光强度与Cu2+浓度在5~200 μmol/L范围内呈良好的线性关系,Cu2+回收率在95.2%~105.3%,检测限为0.48 μmol/L。L-Cys-AuNCs作为Cu2+探针应用,方法简单、测试快捷、选择性高、稳定性好,有望用于水体中Cu2+的定性、定量检测。
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凌洁
李瑞琪
吴晗
曹潘
关键词:  金纳米簇  L型半胱氨酸  Cu2+检测  荧光猝灭    
Abstract: Gold nanoclusters (L-Cys-AuNCs) with strong fluorescence and good dispersion are synthesized via one-step method by using chloroauric acid (HAuCl4) as gold atom precursor, and L-cysteine (L-Cys) as reductant and protective agent under the reaction conditions of 60℃ and 8 h.The stability of L-Cys-AuNCs and their fluorescence response to Cu2+ in water are investigated.Experiments show that L-Cys-AuNCs will not age when they have been placed in 80 mmol·L-1 NaCl solution within 25 days, and remains good chemical stability.L-Cys-AuNCs probe is not interfered by common cations in water and has a good selectivity to Cu2+.It presents rapidly fluorescence response to Cu2+ and needs a short stabilization time.There is a good linear relationship between the fluorescence intensity of L-Cys-AuNCs probe and the concentration of Cu2+ in the range of 5-200 μmol·L-1.The recovery rate of Cu2+ is in the range of 95.2%-105.3%, and the detection limit is 0.48 μmol·L-1.As a probe for Cu2+, L-Cys-AuNCs can be used for the qualitative and quantitative determination of Cu2+ in real water.
Key words:  gold nanocluster    L-cysteine    detection of Cu2+    fluorescence quenching
收稿日期:  2021-05-24      修回日期:  2021-07-27           出版日期:  2021-10-20
ZTFLH:  OQ657.32  
基金资助: 陕西省教育厅自然科学专项(19JK0194);陕西省科技厅青年项目(2021JQ-886)
通讯作者:  凌洁(1984-),女,博士生,副教授,研究方向为光化学反应及矿物功能材料加工,通讯联系人,27438614@qq.com。    E-mail:  27438614@qq.com
引用本文:    
凌洁, 李瑞琪, 吴晗, 曹潘. L型半胱氨酸保护合成纳米金簇及检测水中Cu2+的研究[J]. 现代化工, 2021, 41(10): 238-242.
LING Jie, LI Rui-qi, WU Han, CAO Pan. Synthesis of gold nanoparticles protected by L-cysteine and usage in determination of Cu2+ in water samples. Modern Chemical Industry, 2021, 41(10): 238-242.
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https://www.xdhg.com.cn/CN/10.16606/j.cnki.issn0253-4320.2021.10.049  或          https://www.xdhg.com.cn/CN/Y2021/V41/I10/238
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