Constructing type II heterojunction of 2D/1D Pg-C3N4/Ag3VO4 nanocomposite with high interfacial charge separation for boosting photocatalytic CO2 reduction under solar energy
Source abstract
Abstract
The well-designed, template-free synthesis of 2D protonated g-C 3N 4 nanosheets (Pg-C 3N 4) coupled with novel 1D Ag 3VO 4 nanorods has been investigated to construct 2D/1D interface heterostructures with strong electrostatic interactions between the positively charged 2D Pg-C 3N 4 nanosheets and the negatively charged 1D Ag 3VO 4 nanorods. The coupling of Pg-C 3N 4 and Ag 3VO 4 with desirable characteristics resulted in a 2D/1D interface heterojunction with a type II charge carrier transfer mechanism, effectively maintaining and utilizing charge carriers. The 2D/1D Pg-C 3N 4/Ag 3VO 4 exhibited remarkable photocatalytic performance for CO 2 conversion with H 2O, resulting in maximum CH 4 and dimethyl ether (DME) production of 352.3 and 130.9 µmol/g-cat, respectively. A quantum yield of 0.23 % for CH 4 generation was achieved over the 2D/1D Pg-C 3N 4/Ag 3VO 4, which was 2.9 and 1.4 times higher than that of the Pg-C 3N 4 and Ag 3VO 4 samples, respectively. The improvement in photocatalytic performance primarily stems from the effective interaction between Pg-C 3N 4 and ternary Ag 3VO 4, leading to enhanced transfer and separation of photoinduced charge carriers through the creation of a type II heterojunction. The findings of this study are useful in designing template-free heterojunctions for photocatalytic CO 2 conversion and other solar energy applications.
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Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Covalent Organic Framework Applications · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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