Construction of two-dimensional heterojunctions based on metal-free semiconductor materials and Covalent Organic Frameworks for exceptional solar energy catalysis
Year: 2024
Type: article
Abstract: Covalent organic frameworks (COFs) are newly developed crystalline substances that are garnering growing interest because of their ultra-high porosity, crystalline nature, and easy-modified architecture, showing promise in the field of photocatalysis. However, it is difficult for pure COFs materials to achieve excellent photocatalytic hydrogen production due to their severe carrier recombination problems. To mitigate this crucial issue, establishing heterojunction is deemed an effective approach. Nonetheless, many of the metal-containing materials that have been used to construct heterojunctions with COFs own a number of drawbacks, including small specific surface area and rare active sites (for inorganic semiconductor materials), wider bandgaps and higher preparation costs (for MOFs). Therefore, it is necessary to choose metal-free materials that are easy to prepare. Red phosphorus (RP), as a semiconductor material without metal components, with suitable bandgap, moderate redox potential, relatively minimal toxicity, is affordable and readily available. Herein, a range of RP/TpPa-1-COF (RP/TP1C) composites have been successfully prepared through solvothermal method. The two-dimensional structure of the two materials causes strong interactions between the materials, and the construction of heterojunctions effectively inhibits the recombination of photogenic charge carriers. As a consequence, the 9% RP/TP1C composite, with the optimal photocatalytic ability, achieves a photocatalytic H 2 evolution rate of 6.93 mmol g −1 h −1 , demonstrating a 10.19-fold increase compared to that of bare RP and a 4.08-fold improvement over that of pure TP1C. This article offers a novel and innovative method for the advancement of efficient COF-based photocatalysts. • The RP/TP1C heterojunction is successfully constructed based on metal-free materials. • The RP/TP1C heterojunction exhibits outstanding solar-driven photocatalytic H 2 production performance. • The RP/TP1C heterojunction is a two-dimensional photocatalytic system, displaying ultrahigh carrier separation efficiency.
Source: Green Energy & Environment
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: diamond
Funders: European Commission, National Natural Science Foundation of China, Science and Technology Development Fund, Cooperative Research Centres, Australian Government Department of Industry, Australian Renewable Energy Agency, Department of Education of Liaoning Province, Government of Western Australia, State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Australian Research Council
Awards: 二维过渡金属硫化物中金属活性位的调控设计及其电催化二氧化碳还原反应研究, G1287494806, Rechargeable lithium carbon dioxide battery - catalyst design to prototype , G2983721056, G3577540356, Engineering vanadium oxide-based cathode for aqueous ammonium ion batteries, Monolithic Solar Thermal Photocatalytic Membrane for Hydrogen Production, G5091459452, Sustainable Electrolysis via Functional Hybrids for Ammonia Production, ARC Research Hub for Intelligent Energy Efficiency in Future Protected Cropping, G74262681, G7664159534, G7765776526, Perovskite-Based Ferroelectrics for Solar Fuel Production, G8087359779
OpenAlex ID: W4402546398