Hollow nanoporous covalent triazine frameworks via acid vapor-assisted solid phase synthesis for enhanced visible light photoactivity

Abstract

Herein, we report a novel trifluoromethanesulfonic acid vapor-assisted solid phase synthetic method to construct nanoporous covalent triazine frameworks with highly ordered hollow interconnected pores under mild reaction conditions.

Covalent Triazine‐based Frameworks—Tailor‐made Catalysts and Catalyst Supports for Molecular and Nanoparticulate Species

“…Since their electronic structures can be nicely adjusted for example, by choice of the monomer and synthesis conditions, CTFs are highly suitable for various applications within electrochemical energy storage as well as photo‐ and electrocatalysis . Therefore, CTFs have also gained attention as photocatalysts, for example, for the photocatalytic degradation of methylene blue, water splitting, NADH regeneration during artificial photosynthesis of formic acid as a “solar fuel” from CO 2 and as nanoporous photo‐catalysts with defined optoelectronic properties and morphology for various reactions . Especially the synthesis of light‐colored CTFs via the Brønsted acid approach instead of black powders permitted a very fast progress in this application field.…”

“…To inducef urther porosity,t he Brønsted acid catalyzed synthesis might be used in an acid-vapor assisted construction of hollow polytriazine-nanostructures. [41] For this procedure, as olution of nitrile monomers was mixed with uniformly packed SiO 2 nanoparticles of approximately 300 nm size. After solvent evaporation, polymerization under CF 3 SO 3 Hv apor in as ealed system takes place.…”

“…[75] Therefore, CTFs have also gained attention as photocatalysts,f or example,f or the photocatalytic degradation of methylene blue, [76] water splitting [27,31,77] ,N ADH regeneration during artificial photosynthesis of formic acid as a" solar fuel" from CO 2 [78] and as nanoporous photo-catalysts with defined optoelectronic properties and morphology for variousr eactions. [41,42] Especially the synthesis of light-colored CTFs via the Brønsted acid approachi nsteado fb lack powders permitted av ery fast progress in this application field. Various modifications of the synthesis approach furthermore enabled the improvemento f these catalystt ypes in terms of accessibility of the active sites for light radiation.A lso in the field of electrocatalysis, metalfree CTFs have proven to be very interesting candidates.…”

A Covalent Triazine‐Based Framework Consisting of Donor–Acceptor Dyads for Visible‐Light‐Driven Photocatalytic CO2 Reduction

“…[12][13][14] By carefully choosingt he electron-donor building units connected to the electron-ac-Photocatalytic conversion of CO 2 into value-added chemical fuels is ap romisinga pproach to address the depletion of fossil energy and environment-related concerns. [12][13][14] By carefully choosingt he electron-donor building units connected to the electron-ac-Photocatalytic conversion of CO 2 into value-added chemical fuels is ap romisinga pproach to address the depletion of fossil energy and environment-related concerns.…”

CO2‐Triggered Switchable Hydrophilicity of a Heterogeneous Conjugated Polymer Photocatalyst for Enhanced Catalytic Activity in Water

“…This indicates ar ole for NaBH 4 as an essential hydrogen and electron donor. [32] Upon light irradiation, the borohydride is oxidized, and at the same time, 4-NP is activated to an anionic radical intermediate by the excited electron. [32] Upon light irradiation, the borohydride is oxidized, and at the same time, 4-NP is activated to an anionic radical intermediate by the excited electron.…”