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应用化学
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应用化学  2020, Vol. 37 Issue (1): 54-60    DOI: 10.11944/j.issn.1000-0518.2020.01.190131
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
pH调控的变色酸2R稳定的银纳米簇的合成
郭永艳ab,曾维伟a,杨萍a,田雁飞a,龙云飞b*()
a湖南有色金属职业技术学院 湖南 株洲 412006
b湖南科技大学 湖南 湘潭 411201
Synthesis of Silver Nanoclusters Stabilized by pH-Regulated Chromotropic Acid 2R
GUO Yongyanab,ZENG Weiweia,YANG Pinga,TIAN Yanfeia,LONG Yunfeib*()
aHunan Nonferrous Metals Vocational and Technical College,Zhuzhou,Hu'nan 412006,China
bSchool of Chemistry and Chemical Engineering,Hunan University ofScience and Technology,Xiangtan,Hu'nan 411201,China
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摘要 

银纳米簇(Ag NCs)具有特殊的物理和化学性质,其具有广泛的应用前景和研究价值。 本文探索了以变色酸2R为稳定剂,经过两次pH调节构建一种快速制备具有强荧光特性、稳定存在且粒径小的Ag NCs的方法。 在最优实验条件下,运用该方法制备得到的Ag NCs的最大发射波长为450 nm,最大激发波长为336 nm,平均粒径为1.74 nm,主要粒经分布在0.68~2.99 nm区域内,该Ag NCs的晶格间距为0.223 nm,晶格类型为(102)。 该Ag NCs可作为探针应用于溶液中微量重金属离子和非金属离子的测定,小分子、弱酸溶液浓度等方面的检测,也可以用于细胞成像等方面。

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郭永艳
曾维伟
杨萍
田雁飞
龙云飞
关键词 pH调控变色酸2R稳定剂银纳米簇    
Abstract

Silver nanoclusters have special physical and chemical properties and wide potential applications. In this paper, a method of rapid preparation of stable silver nanoclusters with strong fluorescence characteristics and small particle size was developed by using chromotropic acid 2R as the stabilizer and pH regulation twice. Under the optimal experimental conditions, the maximum emission wavelength of silver nanoclusters prepared is 450 nm, the maximum excitation wavelength is 336 nm, and the average particle size is 1.74 nm. The main particles are distributed in the region of 0.682.99 nm, the lattice spacing of the silver nanocluster is 0.223 nm, and the lattice type is (102). The silver nanoclusters can be used as probes for the determination of trace heavy metal ions, non-metallic ions in solutions and small molecules, the detection of weak acid concentration, and cell imaging.

Key wordspH regulation    chromotropic acid 2R stablizer    silver nanoclusters
收稿日期: 2019-05-07           接受日期: 2019-08-28
基金资助:国家自然科学基金(21275047)、湖南省自然科学基金(2016JJ5005)和2018年湖南省有色金属管理局直属单位转型发展项目:瑶岗仙钨钼铋多金属矿绿色选矿新工艺研究项目资助
通讯作者: 龙云飞     E-mail: l_yunfei927@163.com
引用本文:   
郭永艳, 曾维伟, 杨萍, 田雁飞, 龙云飞. pH调控的变色酸2R稳定的银纳米簇的合成[J]. 应用化学, 2020, 37(1): 54-60.
GUO Yongyan, ZENG Weiwei, YANG Ping, TIAN Yanfei, LONG Yunfei. Synthesis of Silver Nanoclusters Stabilized by pH-Regulated Chromotropic Acid 2R. Chinese Journal of Applied Chemistry, 2020, 37(1): 54-60.
链接本文:  
http://yyhx.ciac.jl.cn/CN/10.11944/j.issn.1000-0518.2020.01.190131      或      http://yyhx.ciac.jl.cn/CN/Y2020/V37/I1/54
pH V(Three acid)/mL V(NaOH)/mL
4.78 100 32.5
5.72 100 40
6.59 100 47.5
7.96 100 60
8.69 100 65
表1pH值缓冲溶液的配制
Table 1pH Buffer solution configuration
图1不同浓度的变色酸2R下合成的Ag NCs的荧光光谱图(A)及其荧光强度变化(B)
Fig.1The fluorescence spectra(A) and peak intensity change(B) in the synthesis of silver nanoclusters under the different concentrations of chromotropic acid 2R
图2不同浓度的NaBH4下合成的Ag NCs的荧光光谱图(A)及其荧光强度变化(B)
Fig.2The fluorescence spectra(A) and peak intensity change(B) of silver nanoparticles synthesized under different concentrations of NaBH4
图3不同浓度的AgNO3下合成的Ag NCs的荧光光谱图(A)及其荧光强度变化(B)
Fig.3The fluorescence spectra(A) and peak intensity change(B) of silver nanoparticles synthesized at different concentrations of AgNO3
图4(A)不同BR缓冲溶液下合成的Ag NCs的荧光强度变化;(B)Ag NCs的荧光光谱图;(C)不同体积的NaOH存在下Ag NCs的荧光强度变化
Fig.4(A)The fluorescence intensity of silver nanoclusters synthesized under different BR buffer; (B)the fluorescence spectra of silver nanoclusters; (C)the fluorescence intensity of the silver nanoparticles with different volume of NaOH
图5不同温度下合成的Ag NCs的荧光强度变化
Fig.5Changes of fluorescence intensity of silver nanoclusters synthesized at different temperatures
图6不同反应时间下合成的Ag NCs的荧光强度变化
Fig.6The fluorescence intensity of silver nanoclusters synthesized at different reaction times
图7Ag NCs的激发(A)、发射(B)和紫外可见吸收光谱(C)
Fig.7The excitation spectrum(A), emission spectrum(B) and ultraviolet visible absorption spectrum(C) of silver nanoclusters
图8Ag NCs的TEM(A)、粒径分布图(B)和HRTEM(C)
Fig.8TEM image(A), grain size distribution(B), and HRTEM image(C) of silver nanoclusters
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