Work

Preparation of Ag@Ag2O/AgCl composite photocatalytic material and degradation performance for SD I under sunlight

Year: 2025

Type: article

Abstract: The photocatalytic material Ag@Ag 2 O/AgCl was successfully prepared using GO and CA gel as carriers, through chemical coupling, in situ deposition, and photo-induced reduction. The performance of the composite photocatalytic material, its photodegradation performance, mechanism, and pathways of Sudan I (SD I) in APG aqueous solution were explored. The results showed that the prepared composite photocatalytic material was loaded with a large amount of irregular nano-Ag 2 O, AgCl, and silver nanoparticles (AgNPs). In the material, the mass fraction of Ag element is the highest (36.41 wt%). The photocatalytic material showed a significant broad absorption in both the UV and visible light regions, and under visible light irradiation, it can generate a stable and reversible photocurrent, with a small resistance to photogenerated electron transfer, exhibiting good photocatalytic performance. SD I exhibits good solubility in APG (7 mL/1000 mL) aqueous solution after ultrasonic and heating (100 ℃) treatment for 30 min. At a certain concentration of SD I, acidic solution and lower temperature are conducive to the photocatalytic degradation of SD I, and the catalytic degradation process conforms to the pseudo-first-order reaction kinetic relationship. Through five cycles of experiments, the stability of the material was demonstrated to be good. Superoxide radicals (·O 2 − ) and holes (h + ) generated during the photocatalytic degradation are the main active species responsible for degrading SD I. SD I molecules were decolorized by N=N and C-N bond cleavage, and the benzene and naphthalene ring were opened under the action of active substances (h + , ·O 2 − ) and finally mineralized into CO 2 , H 2 O and inorganic ions.

Source: Applied Water Science

DOI: 10.1007/s13201-025-02405-5

Author: Daxiang Gao

Institution: Jiangsu Vocational College of Agriculture and Forestry

Language: English

Topic: Advanced Photocatalysis Techniques

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $2,490