Biheterojunction electrode photocatalytic fuel cell system and method for synthesis of ammonia

By employing Ag2S/ZnO nanoarrays and MXene/spinel ferrite heterojunction structures in a photocatalytic fuel cell system, electron transport and catalytic reactions were optimized, solving the problems of high photogenerated carrier recombination rate, insufficient material activity, and limited light absorption range. This enabled the simultaneous and efficient removal of organic and inorganic pollutants and the synthesis of ammonia, improving the overall performance and stability of the system.

CN119742407BActive Publication Date: 2026-03-24SHANDONG UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411910577.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-24
Publication Date
2026-03-24
Estimated Expiration
2044-12-24

AI Technical Summary

Technical Problem

Existing photocatalytic fuel cell systems suffer from high photogenerated carrier recombination rates, insufficient activity and stability of catalytic materials, limited light absorption range, low electron transport efficiency, and limited ability to treat complex pollutants, resulting in low pollutant removal efficiency and poor simultaneous ammonia synthesis.

Method used

Using Ag2S/ZnO nanoarray heterojunction structure as anode material, combined with MXene-based material and spinel ferrite to construct heterojunction photocathode, electron transport and catalytic reaction pathways are optimized, light absorption is enhanced by simulating sunlight, and ion transport is optimized through multilayer ion exchange membranes to achieve efficient pollutant treatment and ammonia synthesis.

Benefits of technology

It significantly improves photocatalytic efficiency, enhances material stability, achieves simultaneous and efficient removal of organic and inorganic pollutants, improves system applicability and energy utilization, and has good economic benefits and environmental protection value.

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Abstract

The application belongs to but is not limited to the technical field of new energy batteries, and discloses a photocatalytic fuel cell system based on a heterojunction structure for pollutant treatment and a preparation method thereof. Based on a PFC system, antibiotic pollutants are oxidized at an anode, and nitrate pollutants are reduced at a cathode. An energy difference between Fermi energy levels of an anode heterojunction and Fermi energy levels of a cathode heterojunction drives system electron transfer to output electric energy. Based on the reaction principle of the PFC, nitrate existing in wastewater is used as a cathode electron acceptor, and the reduction of nitrate pollutants to synthesize ammonia and the oxidation of organic pollutants are realized in cooperation, so that the two kinds of pollutants at the anode and the cathode are synchronously removed.
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