Superior adsorption performance of metal-organic-frameworks derived magnetic cobalt-embedded carbon microrods for triphenylmethane dyes

TY - JOUR

T1 - Superior adsorption performance of metal-organic-frameworks derived magnetic cobalt-embedded carbon microrods for triphenylmethane dyes

AU - Ye, Jian

AU - Jin, Lina

AU - Zhao, Xiaoshuang

AU - Qian, Xinye

AU - Dong, Mingdong

PY - 2019/2/15

Y1 - 2019/2/15

N2 - In this work, magnetic Co/C microrods were successfully synthesized using direct carbonization of [Co-3(BTC)(2)(H2O)(12)] precursors. After the carbonization, the original shape of the precursors was well maintained, while the magnetic Co nanoparticles were well dispersed in the carbon matrix. The Co/C microrods were used as adsorbents for the adsorption of methyl blue (MB), acid fuchsin (AF), malachite green (MG), rhodamine B (Rh B), methyl orange (MO) and methylene blue (MTB) from their aqueous solutions. The results show that Co/C microrods can selectively adsorb triphenylmethane (TPM) dyes, while the adsorption capacities are about 13960, 11,610 and 4893 mg/g for MB, AF and MG dyes, respectively. The adsorption mechanism can be attributed to pi-pi interaction forces between the sp(2) graphitic carbon in Co/C microrods and the triphenyl structure of dyes. In addition, the synthesized magnetic Co/C micro rods can be easily removed from water using magnetic separation, and subsequently, regenerated using ethanol treatment. (C) 2018 Published by Elsevier Inc.

AB - In this work, magnetic Co/C microrods were successfully synthesized using direct carbonization of [Co-3(BTC)(2)(H2O)(12)] precursors. After the carbonization, the original shape of the precursors was well maintained, while the magnetic Co nanoparticles were well dispersed in the carbon matrix. The Co/C microrods were used as adsorbents for the adsorption of methyl blue (MB), acid fuchsin (AF), malachite green (MG), rhodamine B (Rh B), methyl orange (MO) and methylene blue (MTB) from their aqueous solutions. The results show that Co/C microrods can selectively adsorb triphenylmethane (TPM) dyes, while the adsorption capacities are about 13960, 11,610 and 4893 mg/g for MB, AF and MG dyes, respectively. The adsorption mechanism can be attributed to pi-pi interaction forces between the sp(2) graphitic carbon in Co/C microrods and the triphenyl structure of dyes. In addition, the synthesized magnetic Co/C micro rods can be easily removed from water using magnetic separation, and subsequently, regenerated using ethanol treatment. (C) 2018 Published by Elsevier Inc.

KW - Metal-organic frameworks

KW - Magnetic

KW - Carbon composites

KW - Triphenylmethane dyes

KW - Adsorption

KW - HIGHLY EFFICIENT REMOVAL

KW - MALACHITE GREEN

KW - POROUS CARBON

KW - WATER

KW - NANOSTRUCTURES

KW - NANOCOMPOSITE

KW - NANOPARTICLES

KW - COMPOSITES

KW - NANOSHEETS

U2 - 10.1016/j.jcis.2018.10.073

DO - 10.1016/j.jcis.2018.10.073

M3 - Journal article

C2 - 30384054

SN - 0021-9797

VL - 536

SP - 483

EP - 492

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -