Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO<sub>2</sub> Capture Applications

Qian, Xukun; Ren, Qing-Bao; Wu, Xiaofei; Sun, Jing; Wu, Hongyu; Lei, Jun

doi:10.1002/slct.201702114

Cited by 63 publications

(27 citation statements)

References 49 publications

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“…Satisfactorily,Z IF-67@K 11 to improve the efficiency of N 2 reduction. [25,26] The other limited factor is structurals tability in water solution. For the purpose of stabilizing ZIF-67 andp reventing hydrolysis, modifying is af easible measure, including doping guest hydrophobic molecules (e.g.,c arbon nanotubes, fluorinated molecules, and polyoxometalates in their pores).…”

Section: Introductionmentioning

confidence: 99%

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Wang

et al. 2020

ChemSusChem

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The photocatalytic reduction of N2 to NH3 is considered a promising strategy to alleviate human need for accessible nitrogen and environmental pollution, for which developing a photocatalyst is an effective method to complete the transformation of this process. We firstly design a series of highly efficient and stable polyoxometalates (POMs)‐based zeolitic imidazolate framework‐67 (ZIF‐67) photocatalysts for N2 reduction. ZIF‐67 can effectively fix N2 owing to its porosity. Integration of POMs cluster contributes enormous advantages in terms of broadening the absorption spectrum to improve sunlight utilization, enhance the stability of the materials, effectively inhibit the recombination of photo‐generated electron–hole pairs, and reduce charge‐transfer impedance. POMs can absorb light to convert into reduced POMs, which have stronger reducing ability to provide ample electrons to reduce N2. The reduced POMs can recover their oxidation state through contact with an oxidant, which forms a self‐recoverable and recyclable photocatalytic fixing N2 system. The photocatalytic activity enhances with the increasing number V substitutions in the POMs. Satisfactorily, ZIF‐67@K11[PMo4V8O40] (PMo4V8) displays the most significant photocatalytic N2 activity with a NH3 yield of 149.0 μmol L−1 h−1, which is improved by 83.5 % (ZIF‐67) and 78.9 % (PMo4V8). The introduction of POMs provides new insights for the design of high‐performance photocatalyst nanomaterials to reduce N2.

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Section: Introductionmentioning

confidence: 99%

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Wang

et al. 2020

ChemSusChem

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“…22,23 Qian et al successfully enhanced the water stability of ZIF-67 by Zn-doping during the crystallization process, which was successfully applied in water research. 24 Hai et al rst loaded Au in ZIF-8 to prepare samples with different Au contents by a solid grinding method; this prepared Au@ZIF-8 had a certain activity in gas-phase CO oxidation. 25 Peralta et al studied the selective adsorption separation of ZIF-8 using binary mixtures of n-hexane and isoparaffins with different branches.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and adsorption performance of La@ZIF-8 composite metal–organic frameworks

Chang

et al. 2020

RSC Adv.

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“…linked by imidazole ligands, which have attracted extensive interest since the original report by Yaghi and co‐workers . High porosity originating from high crystallinity and regular topology structure makes ZIFs one of the best porous materials for the selective capture of CO 2 . The outstanding chemical and thermal stability of ZIFs are also favorable for its application under harsh conditions .…”

Section: Introductionmentioning

confidence: 99%

Space‐Confined Synthesis of ZIF‐67 Nanoparticles in Hollow Carbon Nanospheres for CO₂ Adsorption

Guo

Zhu

et al. 2019

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The synthesis of HCSs based core-shell structured nanocomposite can offer many benefits and potential applications. First, the remarkable durability stemming from the carbon framework would be highly beneficial for enduring harsh reaction conditions including acidic, alkaline, and organic regent. [4] Secondly, meso-/ micropores distributed on the surface of carbon shell can provide pathways for the diffusion of mass, which would reduce the diffusion resistance. [6] Last but not the least, the presence of huge inner space of HCSs with respect to the volume of carbon shell itself affords a huge reaction site. Therefore, it is important to experimentally and theoretically investigate the inner space of HCSs-based nanocomposites with controllable sizes for their optimum utilization.Zeolitic imidazole frameworks (ZIFs) with tetrahedral network topologies are a subclass of metal-organic frameworks (MOFs) composed of transition metals (Co, Cu, Zn, etc.) linked by imidazole ligands, which have attracted extensive interest since the original report by Yaghi and co-workers. [16,17] High porosity originating from high crystallinity and regular topology structure makes ZIFs one of the best porous materials for the selective capture of CO 2 . [18][19][20][21][22][23][24][25][26][27] The outstanding chemical and thermal stability of ZIFs are also favorable for its application under harsh conditions. [28][29][30][31][32][33][34][35] It is well established that the surface-to-volume ratio and total porosity of ZIFs are inversely related to its size, and have a significant influence on the adsorption capacity. [36,37] In this regard, reducing ZIFs to nanoscale size is favorable for increasing specific surface area and total porosity as well as enhancing uptake and selectivity.In this context, we report the synthesis of ZIF-67@HCSs material via a space-confined strategy, and its application for CO 2 capture. The as-synthesized ZIF-67@HCSs exhibited a unique core-shell structure composed of single microporous carbon shell and several nanoscale ZIF-67 cores. Due to the nanoconfined environment inside HCSs, these nanoreactors outperformed the conventional solution-based synthesis. [38] The results showed that:(1) the huge inner space of HCSs could be fully utilized without volume expansion, thus enhancing the tap density; (2) spaceconfined synthesis could control the size and morphology of ZIF-67 nanoparticles; (3) high chemical and thermal stability of ZIF-67 nanoparticles protected by hydrophobic carbon shell can avoid the moisture effects for real postcombustion gas separation, and therefore enhance the long-term stability. As expected, the ZIF-67@HCSs endowed with controlled morphology and high porosity exhibited outstanding adsorption capacity for CO 2 .Herein, the design and synthesis of ZIF-67 nanoparticles (NPs) with tunable size grown inside hollow carbon nanospheres (ZIF-67@HCSs) via a space-confined strategy is reported. HCSs are first prepared via pyrolysis of polystyrene@polypyrrole (PS@PPy) composite nanospheres. Furthe...

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Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO₂ Capture Applications

Cited by 63 publications

References 49 publications

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Synthesis and adsorption performance of La@ZIF-8 composite metal–organic frameworks

Space‐Confined Synthesis of ZIF‐67 Nanoparticles in Hollow Carbon Nanospheres for CO₂ Adsorption

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Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO2 Capture Applications

Cited by 63 publications

References 49 publications

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Keggin‐Type Polyoxometalate‐Based ZIF‐67 for Enhanced Photocatalytic Nitrogen Fixation

Synthesis and adsorption performance of La@ZIF-8 composite metal–organic frameworks

Space‐Confined Synthesis of ZIF‐67 Nanoparticles in Hollow Carbon Nanospheres for CO2 Adsorption

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Enhanced Water Stability in Zn‐Doped Zeolitic Imidazolate Framework‐67 (ZIF‐67) for CO₂ Capture Applications

Space‐Confined Synthesis of ZIF‐67 Nanoparticles in Hollow Carbon Nanospheres for CO₂ Adsorption