Microwave hydrothermal fabrication of CuFeCr ternary layered double hydroxides with excellent Cr(VI) adsorption

Yufei Zhang, Cheng Jing, Junjie Zheng, Hang Yu, Qiang Chen, Lin Guo, Duo Pan, Nithesh Naik, Qian Shao, Zhanhu Guo

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number127279
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume628
DOIs
Publication statusPublished - 05-11-2021

All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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