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Pt nanoparticles embedded spine-like $g-C_{3}N_{4}$ nanostructures with superior photocatalytic activity for $H_{2}$ generation and $CO_{2}$ reduction
| Content Provider | Scilit |
|---|---|
| Author | Zhang, Xiao Yang, Ping Jiang, San Ping |
| Copyright Year | 2021 |
| Description | Journal: Nanotechnology Conventional two-dimensional (2D) graphitic carbon nitride, 2D $g-C_{3}N_{4}$ with its layered structures and flat and smooth 2D surface possesses certain disadvantages that is affecting their photocatalytic performances. In this paper, new nanostructured spine-like three-dimensional (3D) $g-C_{3}N_{4}$ nanostructures are created for the first time via a new three-step synthesis method. In this method, self-assembly of layered precursors and $H^{+}$ intercalation introduced by acid treatment play an important role for the unique nanostructure formation of 3D $g-C_{3}N_{4}$ nanostructures. The spine-like 3D $g-C_{3}N_{4}$ nanostructures show a superior photocatalytic performance for $H_{2}$ generation, achieving 4500 $μmol·g^{−1}·h^{−1}$, 8.2 times higher than that on conventional 2D $g-C_{3}N_{4}$. Remarkably spine-like 3D $g-C_{3}N_{4}$ nanostructures demonstrate a clear photocatalytic activity toward $CO_{2}$ reduction to $CH_{4}$ (0.71 $μmol·g^{−1}·h^{−1}$) in contrast to the negligible photocatalytic performance of conventional 2D $g-C_{3}N_{4}$ for the reaction. Adding Pt clusters as co-catalysts substantially enhance the $CH_{4}$ generation rate of the 3D $g-C_{3}N_{4}$ nanostructures by 4 times (2.7 $μmol·g^{−1}·h^{−1}$). Spine-like 3D $g-C_{3}N_{4}$ caged nanostructure leads to the significantly increased active sites and negatively shifted conduction band position in comparison with conventional 2D $g-C_{3}N_{4}$, favorable for the photocatalytic reduction reaction. This study demonstrates a new platform for the development of efficient photocatalysts based on nanostructured 3D $g-C_{3}N_{4}$ for $H_{2}$ generation and conversion of $CO_{2}$ to useful fuels such as $CH_{4}$. |
| Related Links | https://iopscience.iop.org/article/10.1088/1361-6528/abdcee/pdf |
| ISSN | 09574484 |
| e-ISSN | 13616528 |
| DOI | 10.1088/1361-6528/abdcee |
| Journal | Nanotechnology |
| Issue Number | 17 |
| Volume Number | 32 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2021-01-18 |
| Access Restriction | Open |
| Subject Keyword | Journal: Nanotechnology Chemical Engineering Spine-like Cages, |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Nanoscience and Nanotechnology Mechanics of Materials Mechanical Engineering Bioengineering Electrical and Electronic Engineering |
