裘阳,戴荧,刘峙嵘.羧基纤维介孔硅材料对Th(IV)的高效去除[J].有色金属工程,2018,8(3):.
羧基纤维介孔硅材料对Th(IV)的高效去除
Efficient removal of Th (IV) by carboxyl fiber mesoporous materials
投稿时间:2016-11-08  修订日期:2016-12-08
DOI:
中文关键词:  纤维结构  介孔材料  羧基  二氧化硅  钍离子
英文关键词:fiber structure  mesoporous materials  carboxyl  Silica  Th(IV)
基金项目:国家自然科学基金(11375043);江西省科技支撑计划(20151BBG70011);省部共建核资源与环境国家重点实验室培育基地自主(Z1504)
        
作者单位
裘阳 东华理工大学化学生物与材料科学学院
戴荧 东华理工大学
刘峙嵘 东华理工大学化学生物与材料科学学院
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中文摘要:
      通过后嫁接法合成了羧基功能化纤维介孔硅材料,氮气吸附显示比表面积为416 m2/g,孔径11 nm。扫描电镜显示该材料为发散型球状的纤维结构,功能化前后材料的形貌没有明显变化。TGA热重测定,该材料拥有良好的热稳定性。COOH-F-SiO2吸附Th(IV)速度非常快,120分钟内可以达到平衡。在pH = 3.5 0.05;msorbent / Vsolution = 0.4 mg?mL-1,Th(IV)初始浓度[Th]initial = 100 mg?L-1,COOH-F-SiO2对Th(IV)的最大吸附容量达到115.5 mg?g-1。COOH-F-SiO2吸附Th(IV)符合Langmuir(R2 > 0.992)模型,Th4 以单分子层吸附为主。此外,该材料具有选择性吸附Th(IV)的能力,在混合金属离子体系中,不受其他金属离子的干扰,已然保持对Th(IV)较高的吸附速率。
英文摘要:
      Fibrous carboxyl-modified mesoporous SiO2 materials were synthesized by post grafting method, The N2 adsorption-desorption isotherms analysis on the carboxyl-modified fibrous SiO2 microspheres show surfaces-area about 416 m2/g, and pore sharp peaks in about 11nm. TEM observations show that divergent spherical fibrous structure, There was no significant change in the morphology of the materials before and after the functionalization. TGA analysis on exhibits excellent physical properties, including a good thermal. The adsorption of Th(IV) by COOH-F-SiO2 was fast, with an equilibrium time of less than 120 min. The maximum adsorption capacity reached 115.5 mg?g-1 at pH = 3.0 0.05; msorbent / Vsolution = 0.4 mg?mL-1. Adsorption of Th (IV) by COOH-F-SiO2 conforms to the Langmuir model (R2 > 0.992), So Th4 is dominated by mono molecular layer adsorption.Additionally, The material also has the ability to selectively adsorb Th (IV), and coexisting with other metal ions without being affected by other ions.
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