Covalent Triazine Framework Nanosheets for Efficient Energy Storage and Conversion

Abstract

Two-dimensional crystalline covalent triazine frameworks(CTFs) have received much attention because of their unique triazine structure, which endows CTFs with high thermal and chemical stability, high proportion of nitrogen and permanent porosity. Based on this unique structure characteristic, CTFs have shown great potential in energy storage and conversion due to the intrinsically strong conjugated structure, delocalized electron and rich active sites. However, charge carrier(electron, hole or ion) transport can't reach the deep active sites and charge diffusion was impeded by defects in bulk CTFs. Hence, to break through this barrier, increasing attention has been paid to get few layered CTFs or CTFs nanosheets in order to shorten the pathways of charge diffusion and expose more active sites. This review summarizes the synthetic methodologies of CTFs nanosheets and the potential application in ph otocatalytic and electrochemical energy storage and conversion.

Increasing the surface area and CO2uptake of conjugated microporous polymersviaa post-knitting method

“…Porous organic polymers (POPs) with large surface areas, good physical/chemical stabilities, and well-developed nanoporous and pre-designed building blocks have brought an endless vitality to CCS technologies. Since the pioneering work on the first crystalline POPs, COF-1 and COF-5, reported by Yaghi's group in 2005, 10 many genres of POPs have sprouted up and been used in CCS technologies, including covalent organic frameworks (COFs), 11,12 hyper-crosslinked polymers (HCPs), 13 conjugated microporous polymers (CMPs), 14 polymers of intrinsic microporosity (PIMs), 15 covalent triazine frameworks (CTFs), 16,17 and porous aromatic frameworks (PAFs). 18 In particular, CMPs have attracted widespread concern owing to the unique p-conjugated skeleton and easily modified structure, 19 and HCPs have been a focus owing to their facile synthetic method and low cost.…”

Hollow Multishelled Structured SrTiO3 with La/Rh Co‐Doping for Enhanced Photocatalytic Water Splitting under Visible Light

“…utilization of incident light within the absorption edge, which is usually achieved by a hierarchal or resonant structure which could trap the light and extend the optical length. [11][12][13][14] Recently, the construction of hollow multishelled structures (HoMSs) with porous shells and hieratical cavities has proven to be an ideal solution to elevate the light harnesses and photocatalytic performances. [15][16][17][18][19] Unfortunately, the extension of the optical absorption edge of HoMS photocatalysts over visible light regions has not been systematically explored yet.…”

Benzene Ring Knitting Achieved by Ambient‐Temperature Dehalogenation via Mechanochemical Ullmann‐Type Reductive Coupling

“…[1][2][3][4][5] Taking advantage of widely available building blocks and various coupling strategies, since the discovery of Cooper's group in 2007 about the synthesis of microporous poly(aryleneethynylene) networks, [6] intensive studies have been conducted toward the design and fabrication of CPN architectures, and their applications in the fields of gas separation/purification, catalysis, ion extraction, and energy storage. [2,[7][8][9][10] Among the CPNs derived from homocoupling of a single monomer or reaction between two or more different monomers, those constructed via direct CC bond formation between aromatic rings demonstrated superior electronic conductivity and thermal stability compared with the counterparts involving vinyl, acetylenyl, imine, or amino functionalities. [11][12][13][14] Current methodologies capable of constructing CPN skeletons via CC bond formation mainly include solution-based procedures, [4] on-surface polymerization approaches, [15,16] and mechanochemistry-driven pathways.…”