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| 纳米金的绿色合成与CTAB对金纳米聚集体的解聚集作用 | |
| 引用本文： | 戴兢陶,朱 靖,杨锦明,沈 明.纳米金的绿色合成与CTAB对金纳米聚集体的解聚集作用[J].无机化学学报,2011,27(2):308-314. |
| 作者姓名： | 戴兢陶 朱 靖 杨锦明 沈 明 |
| 作者单位： | 1. 江苏省滩涂生物资源与环境保护重点建设实验室,盐城,224002;盐城师范学院化学化工学院,盐城,224002 2. 扬州大学化学化工学院,扬州,225002 3. 江苏省滩涂生物资源与环境保护重点建设实验室,盐城,224002;扬州大学化学化工学院,扬州,225002 |
| 基金项目： | 江苏省滩涂生物资源与环境保护重点建设实验室开放基金(No.JLCBE09003); 国家自然科学基金(No.20773105)资助项目 |
| 摘 要： | 室温下利用鞣酸(TA)既作还原剂又作保护剂,通过绿色还原方法制备了鞣酸包裹的金纳米粒子,并通过紫外可见光谱(UV-Vis)、透射电镜(TEM)、X射线衍射(XRD)、红外光谱(FTIR)等分别进行了表征和分析。结果表明,随着nTA/nHAuCl4比率的增加,紫外可见光谱显示鞣酸稳定的金溶胶最大吸收波长明显增大且吸收带变宽,而最大吸光率逐渐减小。TEM观察证实增加鞣酸用量会导致溶胶体系中花状金纳米聚集体的形成。实验发现,阳离子型表面活性剂十六烷基三甲基溴化铵(CTAB)对鞣酸保护的金纳米聚集体具有强烈的解聚集作用,在剧烈搅拌的条件下CTAB能使金纳米聚集体成功解聚为单分散状态的金纳米粒子,提高体系温度可明显促进CTAB对金纳米聚集体的解聚集作用。 |
| 关 键 词： | 鞣酸 金纳米粒子 绿色合成 十六烷基三甲基溴化铵 解聚集作用 |
Green Synthesis of Gold Nanoparticles and Deaggregating Effect of CTAB on Gold Nanoaggregates |
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| DAI Jing-Tao,ZHU Jing,YANG Jin-Ming and SHEN Ming.Green Synthesis of Gold Nanoparticles and Deaggregating Effect of CTAB on Gold Nanoaggregates[J].Chinese Journal of Inorganic Chemistry,2011,27(2):308-314. | |
| Authors: | DAI Jing-Tao ZHU Jing YANG Jin-Ming and SHEN Ming |
| Institution: | Key Construction Laboratory of Shoal Bioresource and Environment Protection of Jiangsu Province, Yancheng, Jiangsu 224002, China; School of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224002, China,College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China,Key Construction Laboratory of Shoal Bioresource and Environment Protection of Jiangsu Province, Yancheng, Jiangsu 224002, China; School of Chemistry and Chemical Engineering, Yancheng Teachers University, Yancheng, Jiangsu 224002, China and Key Construction Laboratory of Shoal Bioresource and Environment Protection of Jiangsu Province, Yancheng, Jiangsu 224002, China; College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China |
| Abstract: | Gold nanoparticles were fabricated by a green method using tannic acid as a reducing and protecting agent at room temperature. The tannic acid-capped gold nanoparticles were characterized by UV-Vis, TEM, XRD, FTIR, respectively. The results show that the maximum absorption wavelength increases and the absorption band broadens, while the maximum absorbance decreases with the increase of the molar ratio of tannic acid to HAuCl4 (nTA/nHAuCl4). TEM observation indicates that the increase in tannic acid amount could lead to the formation of flower-like gold nanoaggregates in the colloid systems. The experiments reveal that cetyltrimethylammonium bromide (CTAB) has a strong deaggregating effect on tannic acid-capped gold nanoaggregates. And CTAB can successfully deaggregate the gold nanoaggregates into monodispersed gold nanoparticles under vigorous stirring. In addition, the increase in the system temperature can obviously promote the deaggregating effect of CTAB on gold nanoaggregates. |
| Keywords: | tannic acid gold nanoparticle green synthesis cetyltrimethylammonium bromide deaggregating effect |
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