Economical, environmental friendly synthesis, characterization for the production of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles with enhanced CO2 adsorption

Khan, Imran Ullah; Othman, Mohd Hafiz Dzarfan; Jilani, Asim; Ismail, Ahmad Fauzi; Hashim, Haslenda; Jaafar, Juhana; Rahman, Mukhlis A.; Rehman, Ghani Ur

doi:10.1016/j.arabjc.2018.07.012

Cited by 58 publications

(29 citation statements)

References 36 publications

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“…Additionally, with the change in ammonia concentration (4M to 2M) the reduction of crystal size (as tabulated in Table A1) was observed due to further deprotonating of the unreacted imidazole ligands in the pores that accelerates the crystallization process as illustrated in Figure 2(Ad). However at excess of ammonia concentration in composite additional ammonium group would reside within the pores lead to increase of particle size [34]. It confirms that the solvent concentration can affect the crystal size of the catalysts without harmless the host material in the composite.…”

Section: Effect Of Solvent Concentration On Cu/zif-8mentioning

confidence: 68%

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

et al. 2018

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The efficient reduction of CO2 into valuable products such as methanol, over metal-organic frameworks (MOFs) based catalyst, has received much attention. The photocatalytic reduction is considered the most economical method due to the utilization of solar energy. In this study, Copper (II)/Zeolitic Imidazolate Framework-8 (Cu/ZIF-8) catalysts were synthesized via a hydrothermal method for photocatalytic reduction of CO2 to methanol. The synthesized catalysts were characterized by X-ray Photoelectron Spectroscopy (XPS), Field Emission Scanning Electron Microscopy (FESEM) coupled with Energy Dispersive X-ray (EDX), Ultraviolet-visible (UV-vis) spectroscopy, and X-Ray Diffraction (XRD). The host ZIF-8, treated with 2 mmol copper prepared in 2M ammonium hydroxide solution showed the highest photocatalytic activity. The crystal structures of ZIF-8 and 2Cu/ZIF-8N2 catalysts were observed as cubic and orthorhombic, respectively and the XPS analysis confirmed the deposition of Cu (II) ions over ZIF-8 surface among all the prepared catalysts. The orthorhombic structure, nano-sized crystals, morphology and Cu loading of the 2Cu/ZIF-8N2 catalyst were the core factors to influence the photocatalytic activity. The yield of Methanol was found to be 35.82 µmol/L·g after 6 h of irradiations on 2Cu/ZIF-8N2 catalyst in the wavelength range between 530–580 nm. The copper-based ZIF-8 catalyst has proven as an alternative approach for the economical photocatalytic reduction of CO2 to CH3OH.

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Section: Effect Of Solvent Concentration On Cu/zif-8mentioning

confidence: 68%

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

et al. 2018

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“…This band can be assigned to the epoxide ring stretching , . Moreover, a new band at 426 cm –1 is observed in the region of 400–450 cm –1 as well as a characteristic band at 420 cm –1 assigned to the Zn–N mode due to the interaction between a Zn atom and an N atom of 2‐methylimidazole . The novel band can be attributed to the Zn–O mode due to the interaction between the Zn atom and the oxygen atom of PO.…”

Section: Resultsmentioning

confidence: 89%

Tuning the Catalytic Performance of Novel Composites Based on ZIF‐8 and Nafen through Dimensional and Concentration Effects in the Synthesis of Propylene Glycol Methyl Ether

et al. 2019

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Zeolitic imidazolate framework (ZIF‐8, Zn(2‐meIm)2) and composites based on ZIF‐8 and alumina nanofibers (NafenTM), i.e. ZIF‐8/Nafen, were demonstrated to be efficient heterogeneous catalysts for the reaction of methanol with propylene oxide to produce propylene glycol methyl ether (PGME), which is a member of the family of glycol ether solvents used for a wide variety of consumer products and industrial applications. Both the reaction rate and the selectivity toward PGME were found to decrease with increasing crystal size of the ZIF‐8 material, which was related to the change in the number of basic sites and their accessibility. The investigation of ZIF‐8/Nafen composites revealed the dependence of their catalytic performance on the amount of the ZIF‐8 component. In particular, the activity was affected by the crystal size of the ZIF‐8 material and the nature of acid‐base sites in its framework.

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“…The ZnÀ N/CÀ N ratio in ZIF-8 is 0.94, which is comparable to the previously reported results. [22,23] However, it decreases rapidly when the Sn content in xSZ gradually increases, indicating the ZnÀ N cleavage induced by the competitive coordination of Sn 2 + with MIm.…”

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confidence: 99%

Induced CO₂ Electroreduction to Formic Acid on Metal−Organic Frameworks via Node Doping

et al. 2020

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Metal−organic frameworks (MOFs), combining the advantages of heterogeneous and homogeneous components, have been explored as catalytic materials for the CO2 electroreduction reaction (CO2ERR). However, the unmatched metal nodes result in MOFs having lower faradaic efficiencies (FEs) and limited current densities in CO2ERR. Herein, we report a general strategy to promote activities of MOFs via node doping in CO2ERR. With ion exchange, an active tin node was doped into zeolitic imidazolate framework‐8 (ZIF‐8) to facilitate the reduction kinetics of CO2. The divalent Sn2+ node accelerates the formation of formic acid (HCOOH), resulting in the highest HCOOH FE of 74 % and total current density (Jtotal) of 27 mA/cm2 at −1.1 V (vs. reversible hydrogen electrode, RHE) over 0.6 wt% Sn‐doped ZIF‐8 with stable catalytic performance after seven reuse cycles, which is clearly better compared to the catalytic properties of pristine ZIF‐8 (FEHCOOH=0 %, Jtotal=13 mA/cm2). This work opens an avenue for promoting the CO2ERR performance of MOFs by node doping.

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Economical, environmental friendly synthesis, characterization for the production of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles with enhanced CO2 adsorption

Cited by 58 publications

References 36 publications

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Tuning the Catalytic Performance of Novel Composites Based on ZIF‐8 and Nafen through Dimensional and Concentration Effects in the Synthesis of Propylene Glycol Methyl Ether

Induced CO₂ Electroreduction to Formic Acid on Metal−Organic Frameworks via Node Doping

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Economical, environmental friendly synthesis, characterization for the production of zeolitic imidazolate framework-8 (ZIF-8) nanoparticles with enhanced CO2 adsorption

Cited by 58 publications

References 36 publications

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Photoreduction of Carbon Dioxide to Methanol over Copper Based Zeolitic Imidazolate Framework-8: A New Generation Photocatalyst

Tuning the Catalytic Performance of Novel Composites Based on ZIF‐8 and Nafen through Dimensional and Concentration Effects in the Synthesis of Propylene Glycol Methyl Ether

Induced CO2 Electroreduction to Formic Acid on Metal−Organic Frameworks via Node Doping

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Induced CO₂ Electroreduction to Formic Acid on Metal−Organic Frameworks via Node Doping