Synthesis of UiO-66 in Supercritical CO2and Its Application in Dye Adsorption

Yang Wang, Sidi Wang, Zhen Li, Liwei Sun, Xiaoyu Yang, Shaokun Tang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

UiO-66 nanocrystals were synthesized by supercritical reaction crystallization with anhydrous zirconium chloride as the metal precursor, terephthalic acid as the ligand, and a small amount of N,N-dimethylformamide (DMF) and formic acid as cosolvents in supercritical CO2. In our work, the product UiO-66 obtained exhibits typical octahedral morphology with a specific surface area of 1092 m2/g and concentrated micropore diameters of 0.77, 1.05, and 1.73 nm. The thermal decomposition temperature of the product is 450 °C. It was found that the adsorption selectivity of UiO-66 for Congo red is much higher than those for methylene blue and methyl orange, which can reach up to over 1300 mg/g. The adsorption process conforms to the second-order adsorption kinetics curve, and the adsorption isotherm fits into the Langmuir model. Meanwhile, the adsorbent UiO-66 possesses good cycle stability and its adsorption performance remains excellent after seven cycles.
Original languageEnglish (US)
Pages (from-to)771-780
Number of pages10
JournalIndustrial and Engineering Chemistry Research
Volume60
Issue number1
DOIs
StatePublished - Jan 13 2021
Externally publishedYes

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Chemistry
  • Industrial and Manufacturing Engineering

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