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Title of Paper:An eco-friendly photocatalytic coupling capacitive deionization system for efficient chlorophenol wastewater treatment

Journal:Chinese Journal of Catalysis

Place of Publication:Elsever

Key Words:Photocatalysis; Chlorophenols; Capacitive deionization; BN; C3N4

Summary:Since conventional photocatalytic technology fails to achieve complete elimination of chlorophenol contaminants from aqueous environments, this study presents a synergistic photocatalysis-capacitive deionization (PC-CDI) system as an advanced solution for industrial chlorophenol wastewater remediation. The PC-CDI system, employing boron nitride/carbon nitride (BN/CN) heterojunction electrodes, demonstrates exceptional degradation performance toward chlorophenols. The high-surface-area porous BN/CN heterojunction facilitates electro-adsorption and charge carrier separation, thereby synergistically optimizing both photocatalytic (PC) and capacitive deionization (CDI) functionalities. Remarkably, the integrated system achieves a 2,4-DCP degradation efficiency of 97.15% and a 2,4,6-TCP degradation efficiency of 100% in 2 h. The CDI component enables spatial separation through the electro-adsorption of Cl ions at the anode, effectively mitigating their interference and suppressing chlorinated byproduct formation. Concurrently, the electro-adsorption of positively charged chlorophenol pollutants accelerates their diffusion to catalytic sites, promoting the reactive oxygen species (ROS)-driven degradation of chlorophenol pollutants. The PC-CDI system exhibits robust stability (>95% efficiency retention over five cycles) and broad applicability across various chlorophenol derivatives. By circumventing Cl-induced side reactions and inhibiting chlorine radical generation during photocatalysis, this strategy minimizes the environmental risks associated with chlorinated byproducts during chlorophenol wastewater treatment. These findings establish the PC-CDI system as a sustainable and eco-friendly technology for industrial wastewater treatment.

First Author:Ziye Zheng

Correspondence Author:Zuoli He

All the Authors:Yi Ren,Meng Dai,Hongsheng Li,Huizhen Cui,Sen Wang,Shu-guang Wang

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Environmental Science and Engineering

Document Type:J

Volume:79

Page Number:148-161

DOI Number:10.1016/S1872-2067(25)64839-X

Number of Words:8000

Translation or Not:No

Date of Publication:2025-09

Included Journals:SCI

Release Time:2025-09-21