Mg-Al-Cr2O7 Hydrotalcite-Like Catalysts Synthesized at Different pH Values for Styrene Oxidation

Authors

  • Tran Le Huy Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, Vietnam
  • Tran Thi Ngoc Mai Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, Vietnam
  • Vu Anh Tuan Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, Vietnam
  • Pham Quoc Khanh Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, Vietnam
  • Nguyen Thi Minh Thu Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, Vietnam
  • Thao Nguyen Tien Faculty of Chemistry, VNU University of Science, Vietnam National University Hanoi, Vietnam

DOI:

https://doi.org/10.37256/fce.212021624

Keywords:

Mg-Al-Cr2O7, hydrotalcite, interlayer anion, oxidation, styrene

Abstract

Dichromate anions were intercalated between two consecutive hydroxide layers of [Mg0.6Al0.4(OH)2]0.40+ via co-precipitation at different pH conditions. The physico-chemical properties of the obtained solids were examined by physical methods such as X-ray diffraction (XRD), Infrared (IR), Scanning Electron Microscopy (SEM), Brunauer-Emmett-Teller (BET) and Energy-Dispersive Spectroscopy (EDS). The experimental results indicated that the amount of dichromate anions in the catalysts varies with the pH media. Also, the morphology, structure and chemical composition of the materials depends strongly on the preparation conditions. The Mg-Al-Cr2O7 hydrotalcite-like compounds are used as heterogeneous catalysts for the styrene oxidation with H2O2 at mild conditions. The styrene conversion is about 20-50% while styrene selectivity remains rather high.

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Published

2020-11-18

How to Cite

(1)
Tran, L. H.; Tran, T. N. M.; Vu Anh, T.; Pham Quoc Khanh; Nguyen, T. M. T.; Nguyen Tien, T. Mg-Al-Cr<sub>2</sub>O<sub>7</Sub> Hydrotalcite-Like Catalysts Synthesized at Different PH Values for Styrene Oxidation. Fine Chemical Engineering 2020, 2, 12-20.