Rational combination of covalent-organic framework and nano TiO2 by covalent bonds to realize dramatically enhanced photocatalytic activity

Covalent organic frameworks with high quantum efficiency in photocatalytic hydrogen evolution: mediating charge separation

“…3d, Supplementary Table 5 and 6). [32][33][34][35][36][37][38][39][54][55][56][57][58][59][60][61][62][63][64][65][66] As compared with the reported COF/polymer-based photocatalyst, CN-CON showed the highest AQE as far as we know, which was in a comparable level to that of previously reported star inorganic Pt-PdS/CdS photocatalyst. [4] Even comparing with the H 2 evolution rate normalized by the mass, CN-CON is suprior to most of the COFs/polymer-based photocatalyst.…”

Covalent-Organic-Framework-Based Composite Materials

“…In another work, Zhang et al fabricated a TiO 2 /COF composite for photocatalytic H 2 evolution. 15 The generated covalent bonds between TiO 2 and COF can promote both the separation and the transfer rate of photogenerated electrons to enhance the photocatalytic performance. Then, Lan and co-workers developed a general approach to prepare a series of semiconductor-COF Z-scheme catalysts by integrating various semiconductors (TiO 2 , Bi 2 WO 6 , and a-Fe 2 O 3 ) with two COFs (Figure 3).…”

“…Due to the synergistic effect of various components with remarkable features, the application scope of COF-based composite materials has been widely expanded. At the time of which this review is written, various functional materials, including metal nanoparticles (NPs), [10][11][12] metal oxides, [13][14][15] silica, 16,17 carbon materials, 18,19 polymers, 20 metal-organic frameworks (MOFs), [21][22][23] different COFs, 24,25 quantum dots (QDs), 26 and others, 27,28 were already successfully integrated with COFs to fabricate COF-based composite systems (Scheme 1). Owing to the diversity of functional materials, COF-based composites that possess special functional properties can be deliberately designed to satisfy application needs.…”

Light-Driven Hydrogen Evolution Assisted by Covalent Organic Frameworks

“…In addition, two very interesting systems that do not need a Pt co-catalyst to be significantly active emerge from the combination of hexagonal hematite (α-Fe 2 O 3 ) nanosheets on top of the honeycomb-like β-ketoenamine linked TpPa-2-COF generated from reaction of TP with 2,5-dimethyl-p-phenylenediamine (Pa-2) (Figure 3) [52], rendering 3.8 mmol H 2 •g −1 •h −1 ; and from the in situ growth of the TpPa-1-COF in exfoliated MoS 2 , generating a hybrid system where MoS 2 is deposited on top of the TpPa-1-COF [53]. Other possibilities include the deposition of CdS NPs on top COFs, such as the TpPa-2-COF [54] or the CTF-1-COF [55]; and the use of TiO 2 nanosheets functionalized with 3-aminopropyltriethoxysilane (APTES) to chemically bind TpPa-1-COF onto its surface by imine bond formation [56], yielding 11.2 mmol H 2 •g −1 •h −1 and an AQE of 7.6% at 420 nm in the presence of Pt.…”