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Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids

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Covalent Organic Framework-Semiconductor-Based Heterostructures for Photocatalytic Applications.

Kai Chen¹, Anqi Cai¹, Ting-Ting Li^1,2

¹School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, P. R. China.

|February 17, 2023

Summary

Covalent organic framework (COF)-semiconductor composites enhance photocatalysis by reducing electron-hole recombination. These advanced materials show great promise for sustainable energy and environmental applications.

Keywords:

covalent organic frameworks heterostructures photocatalysis semiconductors synthesis

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Area of Science:

Materials Science
Chemistry
Environmental Science

Background:

Photocatalysis offers sustainable solutions for energy and environmental issues.
Individual photocatalysts suffer from low activity due to rapid photogenerated electron-hole recombination.
Covalent organic framework (COF)-semiconductor composites present a promising strategy to overcome these limitations.

Purpose of the Study:

To review the synthetic strategies for COF-semiconductor heterostructures.
To comprehensively assess the performance of these composites in various photocatalytic reactions.
To discuss structure-activity relationships, synergistic effects, and photocatalytic mechanisms.

Main Methods:

Introduction to synthetic strategies including morphology design, connection modes, and heterojunction types.
Comprehensive review of performance data in photocatalytic water splitting, CO2 reduction, and pollutant degradation.
Discussion of structure-activity relationships and synergistic effects.

Main Results:

COF-semiconductor heterostructures demonstrate enhanced photocatalytic activity.
Synergistic effects improve light utilization, active sites, and stability.
Progress in rational design and preparation of these advanced materials is highlighted.

Conclusions:

COF-semiconductor heterostructures are effective for high-performance photocatalysis.
Further research is needed for simple synthesis, diverse functions, and well-defined mechanisms.
These composites hold significant potential for energy conversion and environmental purification.