Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (6): 683-694.DOI: 10.11944/j.issn.1000-0518.2020.06.190330

• Full Papers • Previous Articles     Next Articles

Designed Formation of NiCo-Layered Double Hydroxide Derived from Zeolitic Imidazolate Framework-67 with Selective Dye Adsorption Property

LIN Yongcenab,DONG Xueab,MA Yuqina*(),ZHAO Langb*()   

  1. aSchool of Chemistry and Environmental Engineering,Changchun University of Science and Technology,Changchun 130012,China
    bState Key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
  • Received:2019-12-11 Accepted:2020-03-12 Online:2020-06-01 Published:2020-06-08
  • Contact: MA Yuqin,ZHAO Lang
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21201160), and the Jilin Province Science and Technology Development Program(No.20170204038GX, No.20170101180JC)

Abstract:

A novel hollow composite of NiCo-layered double hydroxide and zeolitic imidazolate framework-67 (NiCo-LDH@ZIF-67) adsorbent with high adsorption capacity for pollutants, high adsorption selectivity of methyl orange (MO) and great regenerability was synthesized using ZIF-67 as a template. The sample was characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectrometer (FT-IR), N2 adsorption desorption and X-ray photoelectron spectroscopy (XPS). The effect of solution pH, the initial MO concentration and the contact time with the mixture solution on the adsorption property of NiCo-LDH@ZIF-67 was studied. The results indicate that its adsorption kinetics for MO can be well simulated by a pseudo-second-order model and its adsorption isotherm for MO follows the Langmuir equation. The optimized adsorption condition is pH=4, contact time of 15 minutes, and adsorbent dosage of 2400 mg/L. Its maximum adsorption capacity for MO can reach as high as 1766 mg/g and is higher than those reported for all similar adsorbents in the literature. In addition, NiCo-LDH@ZIF-67 can selectively adsorb MO from a mixed solution of MO and methylene blue (MB).

Key words: layered double hydroxide, adsorption, dye, metal organic frameworks, zeolitic imidazolate framework-67