Enhanced adsorption of Ag+ on triethanolamine modified titanate nanotubes
Enhanced adsorption of Ag+ on triethanolamine modified titanate nanotubes
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三乙醇胺修饰钛酸盐纳米管增强银的吸附
DOI:
10.1016/j.colsurfa.2017.09.049
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发表时间:
2018-01
期刊:
影响因子:
--
通讯作者:
Zhou Yonghua
中科院分区:
文献类型:
--
作者:
Wang Hui;Zheng Long;Liu Gonggang;Zhou Yonghua
A novel high adsorption capacity adsorbent of triethanolamine modified titanate nanotubes (TEOA-TNTs) was prepared by simple hydrothermal process and modification technique. The FT-IR, XPS, Zeta-potential and nitrogen adsorption-desorption results showed that titanate nanotubes (TNTs) was successfully modified by triethanolamine (TEOA) via electrostatic interaction and laTEOA) via electrostatic interaction and lattice doping. The as-prepared TEOA-TNTs exhibited a significant enhancement on adsorption capacity towards Ag+compared with TNTs. The adsorption isotherm of Ag+on TEOA-TNTs fitted the Langmuir equation well and the maximum adsorption capacity of TEOA-TNTs for Ag+was estimated to be 396 mg/g at 25 °C. The chelation and reduction mechanism of Ag+on TEOA-TNTs was confirmed by the pseudo second-order adsorption kinetics assessments and the existence of metallic silver on TEOA-TNTs. Considering its relative simple preparation procedure, TEOA-TNTs can be a promising candidate for the recovery of Ag+from the aqueous solution.
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