Work

Biodegradation performance of azo dyes based on Fe-Mn@C dual-template molecularly imprinted sensor

Year: 2025

Type: article

Abstract: • Molecular imprinting sensor for determining the safety of dye degradation endpoint. • Sensor prepared onto Iron-manganese bimetallic material-modified glassy carbon electrode. • The detection limit of the sensor is 6.70×10 −4 nmol/L. • Sensor exhibits satisfactory stability, high selectivity, excellent universality. • This method can be extended to analyze the safety of others degradation endpoint. The microbial degradation of aromatic organic pollutants is incomplete due to their metabolic characteristics, which can easily produce certain highly toxic intermediates. Therefore, this article designs a dual template molecularly imprinted sensor (DTMIP/Fe-Mn@C) for iron manganese metal nanomaterials, prepared Fe-Mn@C composite materials by a one pot method were coated on the surface of glassy carbon electrodes and covered with molecularly imprinted membranes through electropolymerization and elution methods, achieving real-time detection of specific intermediate products 2-methylbutyric acid (2-MBA) and 3-methylbutyric acid (3-MBA) degraded by azo dyes. In order to determine the detection sensitivity and intensity range of the sensor, optimization experiments were conducted on various parameters that affect the detection performance, such as the type of functional monomer and its composition ratio with the template molecule, detection time window, environmental pH value, etc. Finally, o-Phenylenediamine was determined as the functional monomer, with a molar ratio of 1:1:6 to the template molecules 2-MBA and 3-MBA. Electrochemical testing was conducted in a neutral environment with an incubation time of 5 min and pH = 7. The results indicate that the sensor has a relatively wide detection range, high sensitivity, obvious recognition features, and excellent stability for 2-MBA and 3-MBA. This new dual template molecularly imprinted sensor can quickly and accurately determine the safety of highly toxic intermediates in the degradation process of aromatic organic pollutants, providing a theoretical basis and application potential for trace detection and real-time monitoring.

Source: Journal of Environmental Sciences

DOI: 10.1016/j.jes.2025.03.038

Authors: Qikai Fu, Deliang Guo, Xiaoyu Zhang, Xiongfang An, Xiaolin Xu

Institutions: Shihezi University, Xinjiang Production and Construction Corps, Shanghai Institute of Technology

Language: English

Topic: Analytical chemistry methods development

Subfield: Analytical Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,000

Funders: Shihezi University, Science and Technology Planning Project of Guangdong Province