TY - JOUR
T1 - Microwave hydrothermal fabrication of CuFeCr ternary layered double hydroxides with excellent Cr(VI) adsorption
AU - Zhang, Yufei
AU - Jing, Cheng
AU - Zheng, Junjie
AU - Yu, Hang
AU - Chen, Qiang
AU - Guo, Lin
AU - Pan, Duo
AU - Naik, Nithesh
AU - Shao, Qian
AU - Guo, Zhanhu
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/11/5
Y1 - 2021/11/5
N2 - CuFeCr ternary-layered double hydroxides (L-CuFeCr) were prepared via the microwave hydrothermal method and used as an adsorbent for removing hexavalent chromium (Cr(VI)) ions in aqueous solution. Powder X-ray diffraction confirmed the formation of well crystalline L-CuFeCr. Scanning electron microscopy and transmission electron microscopy showed that the spherical structure of L-CuFeCr was formed by the stacking of nanosheets. When the molar ratio of Cu/Fe/Cr was 6:2:1, the as-obtained L-CuFeCr possessed a larger specific surface area (100.3 m2/g) and exhibited a high adsorption performance. The saturated adsorption capacity reached 22.24 mg/g for Cr(VI) ions at pH= 2. The adsorption process of this new adsorbent fitted well with the pseudo-second-order kinetic model and the adsorption isotherm followed Langmuir adsorption isotherm, indicating a monolayer and chemical adsorption. This study demonstrates that L-CuFeCr can be used as an excellent adsorbent to remove Cr(VI) ions from aquatic environments.
AB - CuFeCr ternary-layered double hydroxides (L-CuFeCr) were prepared via the microwave hydrothermal method and used as an adsorbent for removing hexavalent chromium (Cr(VI)) ions in aqueous solution. Powder X-ray diffraction confirmed the formation of well crystalline L-CuFeCr. Scanning electron microscopy and transmission electron microscopy showed that the spherical structure of L-CuFeCr was formed by the stacking of nanosheets. When the molar ratio of Cu/Fe/Cr was 6:2:1, the as-obtained L-CuFeCr possessed a larger specific surface area (100.3 m2/g) and exhibited a high adsorption performance. The saturated adsorption capacity reached 22.24 mg/g for Cr(VI) ions at pH= 2. The adsorption process of this new adsorbent fitted well with the pseudo-second-order kinetic model and the adsorption isotherm followed Langmuir adsorption isotherm, indicating a monolayer and chemical adsorption. This study demonstrates that L-CuFeCr can be used as an excellent adsorbent to remove Cr(VI) ions from aquatic environments.
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U2 - 10.1016/j.colsurfa.2021.127279
DO - 10.1016/j.colsurfa.2021.127279
M3 - Article
AN - SCOPUS:85111883731
SN - 0927-7757
VL - 628
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 127279
ER -