Effect of carbonization temperature on adsorption property of ZIF-8 derived nanoporous carbon for water treatment

Abstract

Effect of carbonization temperature on adsorption property of ZIF-8 derived nanoporous carbon for water treatment, Microporous and Mesoporous Materials (2016), doi: 10.1016/j.micromeso.2016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractThe heat treatment effect on the adsorption capabilities of nanoporous carbon particles derived from Zeolitic Imidazolate Framework-8 (ZIF-8) was investigated at 600, 1000 and 1200 C in this study. The results showed that heat treatment at 1000 C had a significant effect on the adsorption capacity of ZIF-8 (almost 10 times) for the removal of methylene blue (MB) dye from water. Nanoporous carbons were synthesized by direct carbonization of ZIF-8. SEM and TEM images showed that the carbon resulting from ZIF-8 carbonization at various temperatures retained the original structure and morphology of ZIF-8. The carbon nanoparticles carbonized at 1000 C exhibited outstanding adsorption capacities (186.3 mg/g) compared to nanoparticles carbonized at 600 C (49.5 mg/g) and 1200 C (36.7 mg/g) as wellas ZIF-8 (19.5 mg/g) due to the change in surface charge and pore size distribution. The surface functionalities of materials were also characterized by Raman Spectroscopy, N 2 M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 adsorption-desorption, FTIR and TGA. The surface charge of the carbon particles changed from positive (ZIF-8) to negative as a result of conversion to carbon confirmed by zeta potential of the samples. The ZIF-8 derived carbon nanoparticles were found to be efficient adsorbents for water treatment purposes due to the satisfactory adsorption properties such as high adsorption capacity and good wettability.

Influence of the 2-methylimidazole/zinc nitrate hexahydrate molar ratio on the synthesis of zeolitic imidazolate framework-8 crystals at room temperature

“…ZIFs possess the unique properties of high crystallinity, large surface area, exceptional chemical and functional tunability. As a result, ZIFs have gained considerable attention for their potential application in gas storage 2 , CO 2 capture 3,4 , separation 5,6 , sensing 7 , catalysis 8 , drug delivery 9,10 and water treatment 11,12 . Zeolitic imidazolate framework-8 (ZIF-8), with sodalite (SOD) topology constructed from Zn and Hmim, is one of the most investigated ZIF materials 13–15 .…”

Biomass‐Derived Hybrid Hydrogel Evaporators for Cost‐Effective Solar Water Purification

“…[44,45] Additionally, the absorbers used here also facilitate high adsorption capacity of HHEs as carbonized Fe-MOF nanoparticles are well-known for having negative surface charges and high surface areas with broader pore size distributions. [46][47][48] Comparing the ICP results from Figure 5d,f, the concentrations of heavy metal ions were further reduced by two to three orders of magnitude via the evaporation process. Thus, the overall concentrations of heavy metal ions were reduced by six to nine orders of magnitude (ppb) after simultaneous one-step adsorption and solar distillation (Figure 5f), which is comparable with current purification techniques.…”

Adsorptive removal of herbicides from water over nitrogen-doped carbon obtained from ionic liquid@ZIF-8

“…Using high-temperature pyrolysis, ZIF-8 has been converted to highly porous MDCs with acidic and basic functionalities as well as high surface areas [42]. The resultant MDC was applied in liquid phase adsorption for the removal of pharmaceuticals and personal care products (ibuprofen and diclofenac), antibiotics (ciprofloxacin), and organic dye (methylene blue) from water [62][63][64]. Very recently, nitrogen-containing highly porous MDCs were prepared from ZIF-8 after the introduction of the ionic liquid (IL) 1-butyl-3-methylimidazolium bromide [65].…”