TY - JOUR
T1 - A novel mesoporous Fe-silica aerogel composite with phenomenal adsorption capacity for malachite green
AU - Tang, Ruihao
AU - Hong, Wei
AU - Srinivasakannan, C.
AU - Liu, Xuelin
AU - Wang, Xin
AU - Duan, Xinhui
N1 - Funding Information:
This work was financially supported by National Key Research and Development Project of China ( 2019YFC1904601 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/1/15
Y1 - 2022/1/15
N2 - 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.
AB - 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.
KW - Adsorption mechanism
KW - High adsorption capacity
KW - Malachite green
KW - Silica aerogel composite
UR - http://www.scopus.com/inward/record.url?scp=85118099423&partnerID=8YFLogxK
U2 - 10.1016/j.seppur.2021.119950
DO - 10.1016/j.seppur.2021.119950
M3 - Article
AN - SCOPUS:85118099423
SN - 1383-5866
VL - 281
JO - Separation and Purification Technology
JF - Separation and Purification Technology
M1 - 119950
ER -