Tuning Ag Loading and Particle Size in Ag@g-C 3 N 4 Photocatalysts for Selective CO 2 Conversion to CO and CH 4.
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| Title: | Tuning Ag Loading and Particle Size in Ag@g-C 3 N 4 Photocatalysts for Selective CO 2 Conversion to CO and CH 4. |
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| Authors: | Liu, Shicheng1 (AUTHOR), Li, Na1 (AUTHOR), Zhou, Qulan1 (AUTHOR) qlzhou@mail.xjtu.edu.cn |
| Source: | Nanomaterials (2079-4991). Sep2025, Vol. 15 Issue 18, p1443. 14p. |
| Subjects: | Carbon dioxide, Silver nanoparticles, Mechanism (Philosophy), Particle size distribution, Photoreduction, Photocatalysts, Chemical derivatives |
| Abstract: | Elucidating the mechanisms of CO2 photocatalytic conversion systems is crucial for tackling the challenges of carbon neutrality. In this study, a series of Ag@g-C3N4 photocatalysts were constructed with metal particle size modulation as the core strategy to systematically reveal the modulation mechanism of Ag nanoparticles (Ag NPs) size variation on the selectivity of CO2 photoreduction products. Systematic characterizations revealed that increasing Ag size enhanced visible light absorption, promoted charge separation, and improved CH4 selectivity. Photocatalytic tests showed Ag3.0%@CN achieved optimal activity and electron utilization. Energy band analyses indicated that Ag modification preserved favorable conduction band positions while increasing donor capacity. Further density-functional theory (DFT) calculations reveal that Ag NPs size variations significantly affect the adsorption stability and conversion energy barriers of intermediates such as *COOH, CO and CHO, with small-sized Ag7 NPs favoring the CO pathway, while large-sized Ag NPs stabilize the key intermediates and drive the reaction towards the CH4 pathway evolution. The experimental and theoretical results corroborate each other and clarify the dominant role of Ag NPs size in regulating the reaction path between CO and CH4. This study provides mechanistic guidance for the selective regulation of the multi-electron reduction pathway, which is of great significance for the construction of efficient and highly selective CO2 photocatalytic systems. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 188323525 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Tuning Ag Loading and Particle Size in Ag@g-C 3 N 4 Photocatalysts for Selective CO 2 Conversion to CO and CH 4. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Liu%2C+Shicheng%22">Liu, Shicheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Na%22">Li, Na</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Qulan%22">Zhou, Qulan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> qlzhou@mail.xjtu.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Sep2025, Vol. 15 Issue 18, p1443. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Carbon+dioxide%22">Carbon dioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Silver+nanoparticles%22">Silver nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanism+%28Philosophy%29%22">Mechanism (Philosophy)</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Photoreduction%22">Photoreduction</searchLink><br /><searchLink fieldCode="DE" term="%22Photocatalysts%22">Photocatalysts</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+derivatives%22">Chemical derivatives</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Elucidating the mechanisms of CO2 photocatalytic conversion systems is crucial for tackling the challenges of carbon neutrality. In this study, a series of Ag@g-C3N4 photocatalysts were constructed with metal particle size modulation as the core strategy to systematically reveal the modulation mechanism of Ag nanoparticles (Ag NPs) size variation on the selectivity of CO2 photoreduction products. Systematic characterizations revealed that increasing Ag size enhanced visible light absorption, promoted charge separation, and improved CH4 selectivity. Photocatalytic tests showed Ag3.0%@CN achieved optimal activity and electron utilization. Energy band analyses indicated that Ag modification preserved favorable conduction band positions while increasing donor capacity. Further density-functional theory (DFT) calculations reveal that Ag NPs size variations significantly affect the adsorption stability and conversion energy barriers of intermediates such as *COOH, CO and CHO, with small-sized Ag7 NPs favoring the CO pathway, while large-sized Ag NPs stabilize the key intermediates and drive the reaction towards the CH4 pathway evolution. The experimental and theoretical results corroborate each other and clarify the dominant role of Ag NPs size in regulating the reaction path between CO and CH4. This study provides mechanistic guidance for the selective regulation of the multi-electron reduction pathway, which is of great significance for the construction of efficient and highly selective CO2 photocatalytic systems. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/nano15181443 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1443 Subjects: – SubjectFull: Carbon dioxide Type: general – SubjectFull: Silver nanoparticles Type: general – SubjectFull: Mechanism (Philosophy) Type: general – SubjectFull: Particle size distribution Type: general – SubjectFull: Photoreduction Type: general – SubjectFull: Photocatalysts Type: general – SubjectFull: Chemical derivatives Type: general Titles: – TitleFull: Tuning Ag Loading and Particle Size in Ag@g-C 3 N 4 Photocatalysts for Selective CO 2 Conversion to CO and CH 4. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Liu, Shicheng – PersonEntity: Name: NameFull: Li, Na – PersonEntity: Name: NameFull: Zhou, Qulan IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 15 – Type: issue Value: 18 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
| ResultId | 1 |
