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Updated: Aug 26, 2026
A Complete Method for Evaluating the Performance of Photocatalysts for the Degradation of Antibiotics in Environmental Remediation
Published on: October 6, 2022
Strong internal electric field-modulated carbon nitride for tetracycline photodegradation: Guidance by theoretical
Ting Wang1, Wenhao Tang2, Yang Lu3
1Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education, College of Chemistry, Jilin Normal University, Changchun, 130103, PR China; Jilin Joint Technology Innovation Laboratory of Developing and Utilizing Materials of Reducing Pollution and Carbon Emissions, College of Engineering, Jilin Normal University, Siping, 136000, PR China; Jilin Provincial Key Laboratory of Emerging Contaminants Identification and Control, College of Engineering, Jilin Normal University, Siping, 136000, PR China; Jilin Provincial Key Laboratory for Numerical Simulation, Jilin Normal University, 1301 Haifeng Street, Siping, 136000, PR China.
Abstract:
Focusing on the limited light absorption and poor charge behaviors of graphitic carbon nitride (CN), this work selected diethyl 2,5-bis(thieno[3,2-b]thiophen-2-yl)terephthalate (DT) as the dopant guided by theoretical calculations to synthesize a fungus-like ultrathin porous carbon nitride (x-DCN) through one-step thermal-induced copolymerization. The embedding of DT units achieves effective spatial separation of the frontier orbitals, establishing a donor-acceptor (D-A) structure with a strong internal electric field (IEF). Under visible light irradiation, the optimized 10-DCN exhibited a tetracycline (TC) degradation rate four times higher than that of pristine CN. The abundant edge active centers, wider visible-light responsiveness and optimized carrier separation-migration kinetics, collectively propelled the photoactivity. Meanwhile, machine learning models, e.g., the Random Forest (RF) model, with high fitting accuracy (R2 = 0.98), enabled precise quantification of the contribution of degradation variables. Finally, the enhanced degradation mechanism, predominant reactive radicals, reaction pathways, and toxicity were investigated. This research provides a new perspective for the precise design and application of CN-based photocatalysts with a strong IEF.
