Cellulose Derived Magnetic Mesoporous Carbon Nanocomposites with Enhanced Hexavalent Chromium Removal

Bin Qiu; Hongbo Gu; Xingru Yan; Jiang Guo; Yiran Wang; Dezhi Sun; Qiang Wang; Mojammel Khan; Xin Zhang; Brandon Weeks; David P Young; Zhanhu Guo; Suying Wei

doi:10.1039/c4ta04040f

Cellulose Derived Magnetic Mesoporous Carbon Nanocomposites with Enhanced Hexavalent Chromium Removal

Bin Qiu, Hongbo Gu, Xingru Yan, Jiang Guo, Yiran Wang, Dezhi Sun, Qiang Wang, Mojammel Khan, Xin Zhang, Brandon Weeks, David P Young, Zhanhu Guo, Suying Wei

Chemical Engineering

Research output: Contribution to journal › Article

Abstract

Magnetic carbon-iron nanoadsorbents fabricated by carbonizing cellulose and reducing Fe3O4 nanoparticles or Fe(NO3)(3) (the products are denoted as MC-O and MC-N, respectively) have demonstrated great Cr(VI) removal. MC-N with a higher proportion of zero-valence iron (ZVI) and bigger specific surface area exhibited better resistance to oxygen and acid than MC-O due to its smaller pore size. The Cr(VI) removal was highly pH-dependent. For example, 4.0 mg L-1 Cr(VI) neutral solution was completely purified by 2.5 g L-1 MC-O and MC-N within 10 min. 1000 mg L-1 Cr(VI) solution at pH 1.0 was completely removed by both nanoadsorbents in 10 min. The MC-O nanoadsorbents had a higher removal percentage (98.1%) than MC-N (93.5%) at pH 7.0, while MC-N had a removal capacity of 327.5 mg g(-1), much higher than 293.8 mg g(-1) of MC-O at pH 1.0. A chemical adsorption was revealed from the pseudo-second-order kinetic study. Monolayer adsorption of Cr(VI) was revealed by a better fitting of the Langm

Original language	English
Pages (from-to)	17454-17462
Journal	Journal of Materials Chemistry A
DOIs	https://doi.org/10.1039/c4ta04040f
State	Published - Nov 7 2014

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@article{09236ded4f5e47b591efb6b527b9253d,

title = "Cellulose Derived Magnetic Mesoporous Carbon Nanocomposites with Enhanced Hexavalent Chromium Removal",

abstract = "Magnetic carbon-iron nanoadsorbents fabricated by carbonizing cellulose and reducing Fe3O4 nanoparticles or Fe(NO3)(3) (the products are denoted as MC-O and MC-N, respectively) have demonstrated great Cr(VI) removal. MC-N with a higher proportion of zero-valence iron (ZVI) and bigger specific surface area exhibited better resistance to oxygen and acid than MC-O due to its smaller pore size. The Cr(VI) removal was highly pH-dependent. For example, 4.0 mg L-1 Cr(VI) neutral solution was completely purified by 2.5 g L-1 MC-O and MC-N within 10 min. 1000 mg L-1 Cr(VI) solution at pH 1.0 was completely removed by both nanoadsorbents in 10 min. The MC-O nanoadsorbents had a higher removal percentage (98.1%) than MC-N (93.5%) at pH 7.0, while MC-N had a removal capacity of 327.5 mg g(-1), much higher than 293.8 mg g(-1) of MC-O at pH 1.0. A chemical adsorption was revealed from the pseudo-second-order kinetic study. Monolayer adsorption of Cr(VI) was revealed by a better fitting of the Langm",

author = "Bin Qiu and Hongbo Gu and Xingru Yan and Jiang Guo and Yiran Wang and Dezhi Sun and Qiang Wang and Mojammel Khan and Xin Zhang and Brandon Weeks and Young, {David P} and Zhanhu Guo and Suying Wei",

year = "2014",

month = nov,

day = "7",

doi = "10.1039/c4ta04040f",

language = "English",

pages = "17454--17462",

journal = "Journal of Materials Chemistry A",

}

TY - JOUR

T1 - Cellulose Derived Magnetic Mesoporous Carbon Nanocomposites with Enhanced Hexavalent Chromium Removal

AU - Qiu, Bin

AU - Gu, Hongbo

AU - Yan, Xingru

AU - Guo, Jiang

AU - Wang, Yiran

AU - Sun, Dezhi

AU - Wang, Qiang

AU - Khan, Mojammel

AU - Zhang, Xin

AU - Weeks, Brandon

AU - Young, David P

AU - Guo, Zhanhu

AU - Wei, Suying

PY - 2014/11/7

Y1 - 2014/11/7

N2 - Magnetic carbon-iron nanoadsorbents fabricated by carbonizing cellulose and reducing Fe3O4 nanoparticles or Fe(NO3)(3) (the products are denoted as MC-O and MC-N, respectively) have demonstrated great Cr(VI) removal. MC-N with a higher proportion of zero-valence iron (ZVI) and bigger specific surface area exhibited better resistance to oxygen and acid than MC-O due to its smaller pore size. The Cr(VI) removal was highly pH-dependent. For example, 4.0 mg L-1 Cr(VI) neutral solution was completely purified by 2.5 g L-1 MC-O and MC-N within 10 min. 1000 mg L-1 Cr(VI) solution at pH 1.0 was completely removed by both nanoadsorbents in 10 min. The MC-O nanoadsorbents had a higher removal percentage (98.1%) than MC-N (93.5%) at pH 7.0, while MC-N had a removal capacity of 327.5 mg g(-1), much higher than 293.8 mg g(-1) of MC-O at pH 1.0. A chemical adsorption was revealed from the pseudo-second-order kinetic study. Monolayer adsorption of Cr(VI) was revealed by a better fitting of the Langm

AB - Magnetic carbon-iron nanoadsorbents fabricated by carbonizing cellulose and reducing Fe3O4 nanoparticles or Fe(NO3)(3) (the products are denoted as MC-O and MC-N, respectively) have demonstrated great Cr(VI) removal. MC-N with a higher proportion of zero-valence iron (ZVI) and bigger specific surface area exhibited better resistance to oxygen and acid than MC-O due to its smaller pore size. The Cr(VI) removal was highly pH-dependent. For example, 4.0 mg L-1 Cr(VI) neutral solution was completely purified by 2.5 g L-1 MC-O and MC-N within 10 min. 1000 mg L-1 Cr(VI) solution at pH 1.0 was completely removed by both nanoadsorbents in 10 min. The MC-O nanoadsorbents had a higher removal percentage (98.1%) than MC-N (93.5%) at pH 7.0, while MC-N had a removal capacity of 327.5 mg g(-1), much higher than 293.8 mg g(-1) of MC-O at pH 1.0. A chemical adsorption was revealed from the pseudo-second-order kinetic study. Monolayer adsorption of Cr(VI) was revealed by a better fitting of the Langm

U2 - 10.1039/c4ta04040f

DO - 10.1039/c4ta04040f

M3 - Article

SP - 17454

EP - 17462

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

ER -

Cellulose Derived Magnetic Mesoporous Carbon Nanocomposites with Enhanced Hexavalent Chromium Removal

Abstract

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