2021
DOI: 10.3390/catal11060754
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Light-Driven Hydrogen Evolution Assisted by Covalent Organic Frameworks

Abstract: Covalent organic frameworks (COFs) are crystalline porous organic polymers built from covalent organic blocks that can be photochemically active when incorporating organic semiconducting units, such as triazine rings or diacetylene bridges. The bandgap, charge separation capacity, porosity, wettability, and chemical stability of COFs can be tuned by properly choosing their constitutive building blocks, by extension of conjugation, by adjustment of the size and crystallinity of the pores, and by synthetic post-… Show more

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Cited by 19 publications
(14 citation statements)
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“…Porous organic polymers (POPs), including covalent organic frameworks (COFs), covalent triazine frameworks (CTFs), conjugated microporous polymers (CMPs), hyper‐cross‐linked polymers (HCPs) and polymers of intrinsic microporosity (PIMs), are a series of porous materials which are composed by various organic monomer by strong covalent bond [7] . Owing to their advantages of wide light‐absorption range, tunable optical bandgaps as well as favorable mass transfer capacity, POPs have been widely used in photocatalytic organic synthesis, [8] H 2 production, [9] CO 2 reduction, [10] and organic pollutants degradation [11] . Compared with other POPs, HCPs have been considered to be excellent candidates for practical photocatalysts because of their merits, such as easy to synthesis, low cost, high stability and high visible light response capability [12] .…”
Section: Introductionmentioning
confidence: 99%
“…Porous organic polymers (POPs), including covalent organic frameworks (COFs), covalent triazine frameworks (CTFs), conjugated microporous polymers (CMPs), hyper‐cross‐linked polymers (HCPs) and polymers of intrinsic microporosity (PIMs), are a series of porous materials which are composed by various organic monomer by strong covalent bond [7] . Owing to their advantages of wide light‐absorption range, tunable optical bandgaps as well as favorable mass transfer capacity, POPs have been widely used in photocatalytic organic synthesis, [8] H 2 production, [9] CO 2 reduction, [10] and organic pollutants degradation [11] . Compared with other POPs, HCPs have been considered to be excellent candidates for practical photocatalysts because of their merits, such as easy to synthesis, low cost, high stability and high visible light response capability [12] .…”
Section: Introductionmentioning
confidence: 99%
“…1 Unquestionably, the rational design of photocatalysts is the crucial point for high hydrogen evolution reactivity. [2][3][4][5][6][7] Numerous inorganic semiconducting materials including metal oxides [8][9][10] and metal sulfides [11][12][13][14] have been explored as photocatalysts for the hydrogen evolution reaction (HER), but most of the inorganic photocatalysts showed low absorption in the visible light region, which limits their practical application. In recent years, organic semiconductors featuring extended delocalized π-electrons have been started to be used for PHP investigation.…”
Section: Introductionmentioning
confidence: 99%
“…[23][24][25][26][27] Covalent organic frameworks (COFs) have exhibited outstanding visible-light-driven hydrogen evolution activity due to their advantages of low density, tunable band gaps, wide light-harvesting ability, porous structure nature, and delocalized π-bonds. [28][29][30] However, the recombination rate of photogenerated electronhole pairs is still very high in single-component COFs. In recent years, to improve the separation and migration of photogenerated electron-hole pairs and the transfer of photoinduced electrons in hydrogen evolution reactions, the introduction of a second semiconductor with proper band positions into covalently bonded COF heterostructures has been proved to be a feasible way that also improves the photocatalytic performance.…”
Section: Introductionmentioning
confidence: 99%