Heterostructured MOFs photocatalysts for water splitting to produce hydrogen

Xiao, Yu; Guo, Xiangyang; Yang, Nan; Zhang, Fuxiang

doi:10.1016/j.jechem.2020.10.008

Cited by 65 publications

(21 citation statements)

References 103 publications

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“…28,35 Another challenge the MOFs-related photocatalysts confronted is their relatively poor charge separation efficiency as well as low activity in consideration of the fact that the majority of them are n-type semiconductors with upward band bending. 26,28,36 To date, the water-stable and/or cocatalyst-free MOF photocatalysts with AQE of above 1% for water reduction under visible light is still shortage. 37 Herein…”

Section: ■ Introductionmentioning

confidence: 99%

“…Considering the diversity of both ligands and active nodes, the number of potential materials should also be plenty . Encouraged by the good vision, great efforts have been made in exploiting novel MOF-type photocatalysts for promising photocatalytic water splitting and CO 2 reduction. ,,,− However, to date, the majority of MOFs photocatalysts generally suffer from poor stability in aqueous solution due to their relatively labile coordination bonds. , Moreover, most of them still need the assistance of cocatalyst to drive the water splitting and CO 2 reduction. , Another challenge the MOFs-related photocatalysts confronted is their relatively poor charge separation efficiency as well as low activity in consideration of the fact that the majority of them are n-type semiconductors with upward band bending. ,, To date, the water-stable and/or cocatalyst-free MOF photocatalysts with AQE of above 1% for water reduction under visible light is still shortage …”

Section: Introductionmentioning

confidence: 99%

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Water-Stable Nickel Metal–Organic Framework Nanobelts for Cocatalyst-Free Photocatalytic Water Splitting to Produce Hydrogen

et al. 2022

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Development of water-stable metal–organic frameworks (MOFs) for promising visible-light-driven photocatalytic water splitting is highly desirable but still challenging. Here we report a novel p-type nickel-based MOF single crystal (Ni-TBAPy-SC) and its exfoliated nanobelts (Ni-TBAPy-NB) that can bear a wide range of pH environment in aqueous solution. Both experimental and theoretical results indicate a feasible electron transfer from the H4TBAPy ligand (light-harvesting center) to the Ni–O cluster node (catalytic center), on which water splitting to produce hydrogen can be efficiently driven free of cocatalyst. Compared to the single crystal, the exfoliated two-dimensional (2D) nanobelts show more efficient charge separation due to its shortened charge transfer distance and remarkably enhanced active surface areas, resulting in 164 times of promoted water reduction activity. The optimal H2 evolution rate on the nanobelt reaches 98 μmol h–1 (ca. 5 mmol h–1 g–1) showing benchmarked apparent quantum efficiency (AQE) of 8.0% at 420 nm among water-stable MOFs photocatalysts.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water-Stable Nickel Metal–Organic Framework Nanobelts for Cocatalyst-Free Photocatalytic Water Splitting to Produce Hydrogen

et al. 2022

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“…[28][29][30][31][32][33][34] However, the vast majority of researches on MOF photocatalysts for water splitting have focused on the half reaction, namely, the evolution of H 2 or O 2 , and under most conditions a co-catalyst is required. [35][36][37][38] Therefore, additional information regarding the possibility to develop MOF-based photocatalysts for overall water splitting (OWS) to produce H 2 and O 2 simultaneously, [39][40][41] especially in the absence of a cocatalyst is needed.…”

Section: Introductionmentioning

confidence: 99%

“…Among various photocatalysts, MOFs have a series of advantages including the structural variety and tunability, the high surface area and porosity, particularly the interaction and the distance between the metallic nodes and the organic linkers in many cases are convenient for an efficient energy transfer from the excited organic linkers to the metal nodes [28–34] . However, the vast majority of researches on MOF photocatalysts for water splitting have focused on the half reaction, namely, the evolution of H 2 or O 2 , and under most conditions a co‐catalyst is required [35–38] . Therefore, additional information regarding the possibility to develop MOF‐based photocatalysts for overall water splitting (OWS) to produce H 2 and O 2 simultaneously, [39–41] especially in the absence of a cocatalyst is needed.…”

Section: Introductionmentioning

confidence: 99%

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

Chen

Ren

et al. 2021

ChemSusChem

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Cerium (IV)-based metal-organic frameworks (MOFs) are highly desirable due to their unique potential in fields such as redox catalysis and photocatalysis. However, due to the high reduction potential of Ce IV species in solution, it is still a great challenge to synthesize Ce IV -MOFs with novel structures, which are extremely dominated by the hexanuclear CeÀ O cluster inorganic building units (IBUs). Herein, a CeÀ O IBU chain containing Ce IV -MOF, CSUST-3 (CSUST: Changsha University of Science and Technology), was successfully prepared using the kinetic stabilization study of UiO-66(Ce)-NDC (H 2 NDC = 2,6naphthalenedicarboxylic acid). Furthermore, owing to the superior redox activity, Lewis acidity and semiconductor-like behavior owing to Ce 4 + , activated CSUST-3 was demonstrated to be an excellent catalyst for CO 2 chemical fixation. One-pot synthesis of styrene carbonate from styrene and CO 2 was achieved under mild conditions (1 atm CO 2 , 80 °C, and solvent free). Moreover, activated CSUST-3 was shown to be a remarkable co-catalyst-free photocatalyst for overall water splitting (OWS), rendering 59 μmol g À 1 h À 1 of H 2 and 22 μmol g À 1 h À 1 of O 2 under simulated sunlight irradiation (Na 2 S-Na 2 SO 3 as sacrificial agent).

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“…Nowadays, there are several strategies for improving the photocatalytic activity of MOFs, many of which have been described in previous reviews. [81][82][83][84][85] We will highlight the main strategies with a focus on the preparation of heterostructures as the most promising approach.…”

Section: Strategies For Boosting the Photocatalytic Activity Of Mofsmentioning

confidence: 99%

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

Belousov

Fukina

Koryagin

2022

J of Chemical Tech & Biotech

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Heterogeneous photocatalysis has been considered one of the most attractive alternative routes to transforming naturally abundant, clean, and sustainable solar energy into chemical energy. Nowadays, the most popular heterogeneous photocatalyst, titanium dioxide, has already found applications for water splitting to produce hydrogen and oxygen, for the degradation of organic pollutants, for air purification, and for the creation of self‐cleaning coatings. However, TiO2 has a significant limitation: a large band gap (3.0–3.4 eV) that makes it impossible to use anything other than ultraviolet illumination to initiate photocatalytic processes. With a focus on efficient solar‐energy utilization, the development of new photocatalysts that are sensitive to visible light is an important direction in the theory and practice of heterogeneous photocatalysis. In this regard, the use of metal–organic frameworks (MOFs) is an attractive route; they have emerged as an interesting class of materials for applications in photoreactions due to their flexible tunability in composition, structure, and functional properties, along with their facilitated adsorption towards chemicals and their efficient light absorption. Moreover, they can be composed with other semiconductors to produce heterojunctions (e.g., type‐II, Z‐scheme, and S‐scheme), whose effectiveness in photogenerated charge separation has already been proven by many examples. The present critical review reports progress over the last 5 years in the preparation and activity of metal–organic framework‐based heterojunction photocatalysts for the degradation of organic pollutants. © 2022 Society of Chemical Industry (SCI).

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Heterostructured MOFs photocatalysts for water splitting to produce hydrogen

Cited by 65 publications

References 103 publications

Water-Stable Nickel Metal–Organic Framework Nanobelts for Cocatalyst-Free Photocatalytic Water Splitting to Produce Hydrogen

Water-Stable Nickel Metal–Organic Framework Nanobelts for Cocatalyst-Free Photocatalytic Water Splitting to Produce Hydrogen

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

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Heterostructured MOFs photocatalysts for water splitting to produce hydrogen

Cited by 65 publications

References 103 publications

Water-Stable Nickel Metal–Organic Framework Nanobelts for Cocatalyst-Free Photocatalytic Water Splitting to Produce Hydrogen

Water-Stable Nickel Metal–Organic Framework Nanobelts for Cocatalyst-Free Photocatalytic Water Splitting to Produce Hydrogen

A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO2 Chemical Fixation and Photocatalytic Overall Water Splitting

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

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A Novel Cerium(IV)‐Based Metal‐Organic Framework for CO₂ Chemical Fixation and Photocatalytic Overall Water Splitting