Work

Development of a g-C3N4-based photocatalysis-self-Fenton system for efficient degradation and mineralization of organic pollutants

Year: 2025

Type: article

Abstract: Photocatalytic water treatment holds great promise for addressing global challenges associated with energy shortage and water scarcity. However, despite decades of research, its practical implementation remains constrained by the limited efficiency in generating and utilizing hydroxyl radicals (·OH). To this end, this study develops a photocatalysis-self-Fenton system based on graphitic carbon nitride (g-C 3 N 4 ). By introducing P heteroatoms into the g-C 3 N 4 matrix, we enhance O 2 adsorption, while the incorporation of cyano groups improves H + adsorption (both of which favor H 2 O 2 generation) and prevents the generated H 2 O 2 from decomposing into ·OH on the catalyst surface. This system boosts the steady-state concentration of · OH by approximately 42 times compared to photocatalytic system, while the homogeneous generation of ·OH further enhances its utilization. As a result, it enables the complete degradation of 2,4-Dichlorophenol in only 20 min under visible light, with a mineralization rate of 71.21%. Additionally, this system demonstrates broad applicability, achieving removal efficiencies exceeding 90% for various typical organic pollutants (4-chlorophenol, bisphenol A, norfloxacin, ciprofloxacin, and sulfadiazine). Furthermore, its durability across multiple cycles underscores its potential for practical water treatment applications.

Source: Separation and Purification Technology

DOI: 10.1016/j.seppur.2025.132833

Authors: Minghui He, Meichen Sun, Handong Yu, Limin Su

Institution: Northeast Normal University

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $4,060