气凝胶
吸附
孔雀绿
复合数
材料科学
介孔材料
比表面积
化学工程
介孔二氧化硅
傅里叶变换红外光谱
Zeta电位
打赌理论
复合材料
化学
有机化学
纳米技术
催化作用
纳米颗粒
工程类
作者
Ruihao Tang,Wei Hong,C. Srinivasakannan,Xuelin Liu,Xin Wang,Xinhui Duan
标识
DOI:10.1016/j.seppur.2021.119950
摘要
Silica aerogel and Fe doped silica aerogel composite were synthesized by sol–gel method adopting ambient pressure drying method. The crystal structure, surface morphology, pore structure, surface functional groups and elemental composition of silica aerogel prepared with different concentrations of Fe3+ were characterized by XRD, SEM, TEM, BET, FTIR, XPS and Zeta potential analysis. The specific surface area of the composite aerogel was found to decrease with the increase addition amount of FeCl3. The optimal composite aerogel adsorbent had a surface area of 240 m2/g with well-developed mesoporous network, which possessed a maximum malachite green(MG) adsorption capacity of 1592 mg/g, as compared to virgin silica aerogel of 1250 mg/g. Adsorption capacity for large molecules like MG is very low for the most popular adsorbent such as high surface area activated carbon, which is usually the first-choice adsorbent for wastewater treatment. Such high adsorption capacitiy of the silica aerogel composite is highly promising as it is on the classification of low-cost adsorbents, which can serve to be far better alternative for waste water treatment applications.
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