Removal and reutilization of metal ions on ZIF-67/GO membrane via synergistic photocatalytic-photothermal route

Pei, Wenkai; Zhang, Junyang; Tong, Haijian; Ding, Mengna; Shi, Fengyan; Wang, Ruizhe; Huo, Yuen J.; Li, Hexing

doi:10.1016/j.apcatb.2020.119575

Cited by 94 publications

(31 citation statements)

References 50 publications

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“…Synthesis of Co 4 N-Co 3 O 4 @C Catalyst: ZIF-67 was synthesized based on previously reported methods. [53,54] In detail, to obtain ZIF-67, alcoholic solution (15 mL) containing 2-methylimidazole (0.984 g) was added dropwise to a previously prepared ethanol solution of Co(NO 3 ) 2 (0.873 g) and PVP (0.3 g) with vigorous stirring to form a mixture (ratio of metal salt to ligand is 1:4 = 0.003:0.012 mol). The ZIF-67 was obtained after aging the mixture at room temperature for 24 h. Then, as-prepared ZIF-67 (200 mg) was dispersed in 30 mL of ethanol with continuous stirring for 30 min; afterward, melamine (300 mg) was introduced into the above solution, followed by drying using a rotary evaporator.…”

Section: Methodsmentioning

confidence: 99%

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Guan

Liu

Zhang

et al. 2022

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The rational design of the interface structure between nitride and oxide using the same metallic element and correlating the interfacial active center with a determined catalytic mechanism remain challenging. Herein, a Co4N‐Co3O4 interface structure is designed to determine the effect of interfacial active centers on hydrogen generation from ammonia borane. An unparalleled catalytic activity toward H2 production with a turnover frequency up to 79 min−1 is achieved on Co4N‐Co3O4@C catalyst for ten recycles. Experimental analyses and theoretical simulation suggest that the atomic interface‐exciting effect (AieE) is responsible for the high catalytic activity. The Co4N‐Co3O4 interface facilitates the targeted adsorption and activation of NH3BH3 and H2O molecules to generate H* and H2. The two active centers of Co(N)* and Co(O)* at the Co4N‐Co3O4 interface activate NH3BH3 and H2O, respectively. This proof‐of‐concept research on AieE provides important insights regarding the design of heterogeneous catalysts and promotes the development of the nature and regulation of energy chemical conversion.

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Section: Methodsmentioning

confidence: 99%

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Guan

Liu

Zhang

et al. 2022

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“…For ZIF-67 precursor, there is the apparent stretching vibration at 425 cm −1 related to the characteristic peak of Co-N (Figure S10), which confirms the bonding between the cobalt atom and the N atom in the 2-methylimidazole linker in ZIF-67 [47]. The peaks in the region of 600-1500 cm −1 contribute to the bending and stretching modes of the imidazole ring in ZIF-67 [48]. The characteristic peaks at 693 cm −1 and 756 cm −1 can be ascribed to the out-of-plane bending vibration mode of the imidazole ring [49], while the in-plane bending vibration of the imidazole ring can be observed at 900-1350 cm −1 [50].…”

Section: Resultsmentioning

confidence: 64%

Borate Anion Dopant Inducing Oxygen Vacancies over Co3O4 Nanocages for Enhanced Oxygen Evolution

Liu

et al. 2021

Catalysts

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The rational design of cost effective and highly efficient oxygen evolution reaction (OER) catalysts plays an extremely important role in promoting the commercial applications of electrochemical water splitting. Herein we reported a sacrificial template strategy for the preparation of borate anion doped Co3O4@ZIF-67 nanocages assembled with nanosheets (B-Co3O4@ZIF-67) by hydrothermal boronation of zeolitic imidazolate framework-67 (ZIF-67). During the preparation process, two different kinds of borate anion sources were found to regulate the morphological structures by tuning the etching rate between ZIF precursors and the borate anion. Moreover, borate anion doping was also found to induce oxygen vacancy defects, which is beneficial for modulating the electronic structure and accelerating electron transport. Meanwhile, the resultant B-Co3O4@ZIF-67 nanocages possess a large specific surface area, which is beneficial for the mass transfer of the electrolyte and exposing more catalytic active sites. Benefiting from the advantages above, the resultant B-Co3O4@ZIF-67 nanocages exhibit impressive OER performance with a small overpotential of 334 mV, a current density of 10 mA cm−2, a small Tafel slope of 73.88 mV dec−1, as well as long-term durability in an alkaline electrolyte.

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“…4b, ZIF-67-F exhibits extremely different PL spectra than the ZIF-67, while the latter shows an intense broad band centered at 605 nm resulting from direct recombination of photogenerated electrons and holes; which will lead to a lower photocatalytic activity. 31 Relatively lowest PL intensity of ZIF-67-F3 implies that the –NCO group is effective in inhibiting the recombination of photogenerated electron–hole pairs. 32 Fig.…”

Section: Resultsmentioning

confidence: 99%

Novel functionalization of ZIF-67 for an efficient broad-spectrum photocatalyst: formaldehyde degradation at room temperature

Wang

et al. 2022

New J. Chem.

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Removal and reutilization of metal ions on ZIF-67/GO membrane via synergistic photocatalytic-photothermal route

Cited by 94 publications

References 50 publications

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Borate Anion Dopant Inducing Oxygen Vacancies over Co3O4 Nanocages for Enhanced Oxygen Evolution

Novel functionalization of ZIF-67 for an efficient broad-spectrum photocatalyst: formaldehyde degradation at room temperature

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