Layered manganese dioxide coated gold nanoparticle photocatalyst and preparation method thereof
By coating the surface of gold nanoparticles with layered manganese dioxide to form a unique core-shell structure, the problems of short thermal carrier lifetime and high cost of gold nanoparticle photocatalysts are solved, achieving highly efficient photocatalytic performance, especially showing excellent catalytic effect in the conversion reaction of 5-hydroxymethylfurfural.
CN122076435APending Publication Date: 2026-05-26SICHUAN UNIV
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Patent Information
- Application Number
- CN202610552991.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-24
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
Existing gold nanoparticles as photocatalysts suffer from problems such as short hot carrier lifetime, low quantum efficiency, and high cost.
Method used
By employing a layered manganese dioxide-coated gold nanoparticle structure, and using methoxy polyethylene glycol carboxyl groups as anchoring sites, a unique core-shell structure is formed on the surface of gold nanoparticles, thereby enhancing photocatalytic performance.
Benefits of technology
It improves the catalytic activity of the photocatalyst, enhances its redox ability, provides an efficient electron transport pathway, and improves the photocatalytic conversion rate of 5-hydroxymethylfurfural.
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Abstract
The invention discloses a layered manganese dioxide coated gold nanoparticle photocatalyst and a preparation method thereof, and belongs to the technical field of photocatalytic nano materials. The preparation method comprises the following steps: S1, adding tetrachloroauric acid and quaternary ammonium salt into a sodium borohydride solution, and stirring at 25-120 DEG C for 1-3 hours to obtain a solution A; preparing a solution B containing quaternary ammonium salt, tetrachloroauric acid and ascorbic acid; mixing the solution A and the solution B, and stirring and reacting at 25-50 DEG C for 1-15 hours to obtain Au nanoparticles; and S2, centrifuging the Au nanoparticle dispersion liquid to remove supernate, adding the Au nanoparticle dispersion liquid into a solution C prepared from methoxy polyethylene glycol carboxyl, potassium permanganate, a reducing agent and polyethylene glycol, and stirring and reacting at 25-50 DEG C for 1-5 hours to obtain the layered manganese dioxide coated gold nanoparticles. According to the method disclosed by the invention, methoxy polyethylene glycol carboxyl is introduced to prepare the catalyst with unique layered manganese dioxide coated gold nanoparticles, and the catalyst is used for photocatalytic conversion reaction of 5-hydroxymethylfurfural.
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