Hybrid nanocomposites of ZIF-8 with graphene oxide exhibiting tunable morphology, significant CO2 uptake and other novel properties

Kumar, Ram; Jayaramulu, Kolleboyina; Maji, Tapas Kumar; Rao, C. N. R.

doi:10.1039/c3cc00136a

Cited by 274 publications

(188 citation statements)

References 36 publications

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“…6, CO 2 uptake for MC composites at 1 bar was about 2.67 mmol/g. The value was comparable to CO 2 capacities of HKUST-1/graphite oxide and HKUST-1/aminated graphite oxide composites (Kumar et al 2013;Policicchio et al 2014).…”

Section: Resultssupporting

confidence: 63%

“…Despite the encouraging results of the MOF-5 composites mentioned above, the collapse of MOF-5 structure in the humidity limits the further applications of the synthesized composites at ambient conditions (Kaye et al 2007). Considering this weak point of MOF-5 composites as well as the promising concept of MOF composites, some researchers prepared new composites made of water-stable MOF components, such as MIL-101 (Petit and Bandosz 2010;Prasanth et al 2011), HKUST-1 (Petit et al 2011 and ZIF-8 (Kumar et al 2013), with activated carbon or graphite oxide. Most of the literatures about MOF composites are focused on H 2 storage and NH 3 uptake.…”

Section: Introductionmentioning

confidence: 91%

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Chromium-based metal–organic framework/mesoporous carbon composite: synthesis, characterization and CO2 adsorption

et al. 2015

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New composites of a water-stable chromiumbased metal organic framework MIL-101 and mesoporous carbon CMK-3 were in situ synthesized with different ratios of MIL-101 and CMK-3 using the hydrothermal method. The composites as well as the parent materials were characterized by X-ray diffraction, thermo gravimetric analysis, scanning electron microscope, transmission electron microscope and nitrogen/carbon dioxide adsorption isotherms. The hybrid material possesses the same crystal structure and morphology as its parent MIL-101, and exhibits an enhancement in CO 2 adsorption uptakes when compared to MIL-101 and CMK-3. The increase in CO 2 uptakes was attributed to the combined effect of the formation of additional micropores, the enhancement of micropore volume and the activation of unsaturated metal sites by CMK-3 incorporation.

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Section: Resultssupporting

confidence: 63%

Section: Introductionmentioning

confidence: 91%

Chromium-based metal–organic framework/mesoporous carbon composite: synthesis, characterization and CO2 adsorption

et al. 2015

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“…In addition, other hybrid composites also make use of zeolitic imidazolate frameworks (ZIFs), which possess exceptional chemical and thermal stability to prepare composites with enhanced performance. [28][29][30][31][32] For example, the hybrid nanocomposites of graphene oxide (GO) and ZIF-8, which enable the integration of the unique properties of ZIFs and GO, have tunable surface areas and pore volumes depending on the proportion of GO. Compared to the pure ZIF-8, the GO@ZIF-8 hybrid nanocomposites display remarkable CO 2 storage capacity with increasing GO concentration.…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of zeolitic imidazolate frameworks/carbon nanotube composites with enhanced CO2 adsorption

et al. 2014

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A series of ZIF-8 and hydroxyl-functionalized carbon nanotube (CNT) composites were successfully synthesized by the solvothermal method. The obtained ZIF-8/CNT composites were characterized by XRD, SEM, TGA and N 2 adsorption at 77 K. The contents of ZIF-8 and CNTs in the composites were calculated from thermal analysis data. CO 2 and N 2 adsorption at 273 K on the composites was also investigated and compared. The ZIF-8 particles in the composites exhibit similar crystal structures and morphology to those of pure ZIF-8, but display enhanced thermal stability. The surface areas and pore volumes of the ZIF-8/CNT composites are higher than the values calculated for hypothetical physical mixtures, and the synergetic effect between ZIF-8 and CNTs can be proposed. This phenomenon demonstrates that the incorporation of CNTs into ZIF-8 can facilitate the nucleation and crystallization of ZIF-8. As a result, the composites with an optimal CNT content (3.63 wt%) show improved CO 2 adsorption capacity and higher relative selectivity for CO 2 /N 2 compared with pure ZIF-8.

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“…[16] synthesized a composite of a ZIF-8 MOF and graphene oxide where the BET surface area of the composites decreased with increasing GO content. The CO2 adsorption performances of the synthesized composites showed an enhanced behaviour up to 72wt% in the composite with 20wt%GO (ZG-20).…”

Section: Introductionmentioning

confidence: 99%

Development of MIL-101(Cr)/GrO composites for adsorption heat pump applications

Elsayed

Wang

Anderson

et al. 2017

Microporous and Mesoporous Materials

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Adsorption heat pumps can be used for generating heating, cooling, seasonal energy storage and water desalination applications. Metal-organic frameworks (MOFs) are hybrid porous materials with high surface area and superior adsorption characteristics compared to conventional adsorbents. MIL-101(Cr) has a large pore size with water vapour adsorption capacity up to 1.5 gH2O gads -1 and high cyclic stability thus has the potential to be used in adsorption heat pumps. This work investigates the enhancement of the thermal conductivity and water adsorption characteristics of MIL-101(Cr) using hydrophilic graphene oxide. Two methods have been used to develop MIL-101(Cr)/GrO composites. The first method was through physical mixing between MIL-101(Cr) and GrO while the other was through incorporating the GrO during the synthesis process of MIL-101(Cr). The composites and MIL-101(Cr) were characterized in terms of their structure, water adsorption uptake, BET surface area, particle size, thermal gravimetric analysis, SEM images and thermal conductivity measurements. Results showed that introducing low amounts of GrO (<2%) to the neat MIL-101(Cr) enhanced the water adsorption characteristics at high relative pressure but enhanced the heat transfer properties by 20-30% while using more than 2% of GrO reduced the water adsorption uptake but significantly enhanced the thermal conductivity by more than 2.5 times.

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Hybrid nanocomposites of ZIF-8 with graphene oxide exhibiting tunable morphology, significant CO2 uptake and other novel properties

Cited by 274 publications

References 36 publications

Chromium-based metal–organic framework/mesoporous carbon composite: synthesis, characterization and CO2 adsorption

Chromium-based metal–organic framework/mesoporous carbon composite: synthesis, characterization and CO2 adsorption

In situ synthesis of zeolitic imidazolate frameworks/carbon nanotube composites with enhanced CO2 adsorption

Development of MIL-101(Cr)/GrO composites for adsorption heat pump applications

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