Ionothermal Synthesis of Triazine-Heptazine-Based Copolymers with Apparent Quantum Yields of 60 % at 420 nm for Solar Hydrogen Production from "Sea Water"

Angewandte Chemie
Guigang ZhangMarkus Antonietti

Abstract

Polymeric carbon nitride (PCN), in either triazine or heptazine form, has been regarded as a promising metal-free, environmentally benign, and sustainable photocatalyst for solar hydrogen production. However, PCN in most cases only exhibits moderate activity owing to its inherent properties, such as rapid charge carrier recombination. Herein we present a triazine-heptazine copolymer synthesized by simple post-calcination of PCN in eutectic salts, that is, NaCl/KCl, to modulate the polymerization process and optimize the structure. The construction of an internal triazine-heptazine donor-acceptor (D-A) heterostructure was affirmed to significantly accelerate interface charge transfer (CT) and thus boost the photocatalytic activity (AQY=60 % at 420 nm). This study highlights the construction of intermolecular D-A copolymers in NaCl/KCl molten salts with higher melting points but in the absence of lithium to modulate the chemical structure and properties of PCN.

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Citations

Jan 19, 2019·Chemical Communications : Chem Comm·Kayaramkodath Chandran RanjeeshSukumaran Santhosh Babu
Oct 23, 2018·Angewandte Chemie·Lihua LinXinchen Wang
Mar 13, 2019·Angewandte Chemie·Zhishan LuoXinchen Wang
Sep 3, 2019·Chemical Communications : Chem Comm·Fangsong GuoXinchen Wang
Jan 11, 2020·Angewandte Chemie·Linwen ZhangYingpu Bi
Feb 27, 2020·Chemical Society Reviews·Mohammad Ziaur RahmanCharles Buddie Mullins
Jun 3, 2020·Advanced Materials·Chengxiao ZhaoTierui Zhang
May 29, 2020·Angewandte Chemie·Xiaolang ChenYunfeng Lu
Jan 9, 2019·Frontiers in Chemistry·Gang ZhaoXijin Xu
Dec 20, 2018·Frontiers in Chemistry·Chen XuGuipeng Yu
Feb 6, 2020·Angewandte Chemie·Wenhao ZhangWee-Jun Ong
Nov 21, 2020·ChemPlusChem·Stefano Mazzanti, Aleksandr Savateev
Jan 5, 2021·Nanoscale·Catherine M Aitchison, Reiner Sebastian Sprick
Jan 26, 2021·Chemical Communications : Chem Comm·Emma MitchellRobert Godin
Jun 3, 2021·Materials·Alberto MannuCristina Prandi
Dec 15, 2020·The Journal of Physical Chemistry. B·Emily J RabeCody W Schlenker

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