Bimolecular fluorescent probe method for distinguishing hydroxyl radical generation position in heterogeneous Fenton reaction system

By using a bimolecular fluorescent probe system and a fluorescent internal filtration effect correction model, the generation location of hydroxyl radicals in the heterogeneous Fenton reaction was clarified, resolving mechanistic controversies, providing the reliability of quantitative results and pH control strategies, and improving pollutant degradation efficiency.

CN122042618APending Publication Date: 2026-05-15INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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Patent Information

Application Number
CN202610179885.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-09
Publication Date
2026-05-15

AI Technical Summary

Technical Problem

Existing technologies cannot clearly distinguish the generation site of hydroxyl radicals in heterogeneous Fenton reactions, resulting in ambiguous interpretation of reaction mechanisms, unclear probe behavior, distorted detection signals, and complex and insensitive detection methods, making it difficult to control the reaction pathway according to the properties of pollutants.

Method used

A bimolecular fluorescent probe system was used, combining an outer spherical adsorbed probe and a non-adsorbed probe. The location of hydroxyl radical generation was determined by a fluorescence internal filtration effect correction model, and the generation rate and location were regulated by a pH adjuster.

Benefits of technology

This study resolves the mechanistic controversy surrounding the generation location of hydroxyl radicals, provides reliable quantitative results, reveals the pH regulation chain, offers regulation strategies for advanced oxidation process design, and improves degradation efficiency while reducing energy consumption.

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Abstract

The invention provides a bimolecular fluorescent probe method for distinguishing hydroxyl radical generation positions in a heterogeneous Fenton reaction system, and relates to the field of environmental chemistry. Comprising the following steps: adding an outer ball adsorptive first probe and a non-adsorptive second probe into a to-be-detected heterogeneous Fenton reaction system, fully reacting, sampling, detecting and correcting to obtain a concentration ratio of a second oxidation product to a first oxidation product; and adding a pH regulator according to the concentration ratio so as to regulate and control the generation rate and the generation position of the hydroxyl free radicals. According to the method, a bimolecular probe system is creatively adopted, two probes are distributed on the surface of a mineral and in a solution after being combined at different concentrations and are used for representing distribution of hydroxyl radicals, the generation position of the hydroxyl radicals is defined, and the long-standing mechanism dispute is solved; by establishing and applying a precise correction model aiming at the coumarin fluorescence inner filter effect, key technical obstacles in double-probe fluorescence detection are successfully overcome, and the reliability of a quantitative result is ensured.
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