中山大学学报自然科学版 ›› 2016, Vol. 55 ›› Issue (6): 136-139.

• 研究论文 • 上一篇    下一篇

新型巯基功能化二氧化硅微球的制备及其对银离子的吸附

刘岩1,白晓1,李婷婷1,孙杨1,沈启慧1, 于东冬2,周建光3   

  1. 1.吉林化工学院化学与制药工程学院,吉林 吉林 132022;
    2. 浙江大学医院,浙江 杭州 310027;
    3. 浙江大学控制科学与工程学院智能系统和控制研究所分析仪器研究中心∥工业控制技术国家重点实验室,浙江 杭州310058
  • 收稿日期:2016-05-26 出版日期:2016-11-25 发布日期:2016-11-25
  • 通讯作者: 启慧,于东冬;E-mail:liuyanjlu@126.com, qihuishen@126.com;ddyu@zju.edu.cn

Facile preparation of thiol-functionalized SiO2 microspheres and their adsorption to silver ions

LIU Yan1, BAI Xiao1, LI Tingting1, SUN Yang1, SHEN Qihui1, YU Dongdong2, ZHOU Jianguang3   

  1. 1. Department of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin 132022,China;
    2. Hospital of Zhejiang University, Hangzhou 310027,China;
    3. State Key Laboratory of Industrial Control Technology∥ Institute of Cyber-Systems and Control, Zhejiang University, Hangzhou 310058,China
  • Received:2016-05-26 Online:2016-11-25 Published:2016-11-25

摘要:

表面具有大量巯基的二氧化硅微球与介孔二氧化硅一样,具有吸附重金属离子的功能。通过溶胶凝胶一步法制备巯基功能化的二氧化硅微球,该微球粒度分布均匀、成球率高,直径在1 μm左右。红外和拉曼光谱证明,微球表面富含大量的巯基,超短的吸附平衡时间说明巯基与Ag+迅速螯合,而不同于介孔的扩散吸附。溶液的pH对Ag+吸附量的影响不明显,巯基功能化的微球对Ag+的吸附遵守Slips等温模型,最大吸附量能够达到102 mg/g,并且拟合度达到99.6%。

关键词: 巯基, 二氧化硅, 微球, 吸附, 银离子

Abstract:

The SiO2 microspheres with abundant thiol on the surface have the same property of adsorption to heavy metal ions as that of the mesoporous silica. In onepot, the thiol-functionalized SiO2 microspheres were prepared by a sol-gel method, and SiO2  microspheres had a narrow particle size distribution and well sphere with diameter around 1 μm. FTIR and Raman spectroscopy confirmed there were a great amount of thiols on the surface of microspheres. Meanwhile, the adsorption process of silver ions by the microspheres finished within u1tra-short time, which was in accord with the chelation of silver ions and thiols. And that was different from the diffusion adsorption of mesoporous silica. Furthermore, the pH value of solution had little effect on the adsorption capacity of silver ions and the adsorption maximum is 102 mg/g in Slips isotherm with R2=99.6%.

Key words: thiol, SiO2 , microspheres, adsorption, silver ions

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