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Photocatalytic $H_{2}$Evolution, $CO_{2}$Reduction, and $NO_{x}$Oxidation by Highly Exfoliated $g-C_{3}N_{4}$
| Content Provider | MDPI |
|---|---|
| Author | Miroslava, Edelmannová Kamila, Kočí Todorova, Nadia Papailias, Ilias Giannakopoulou, Tatiana Ioannidis, Nikolaos Boukos, Nikos Dallas, Panagiotis Reli, Martin Trapalis, Christos |
| Copyright Year | 2020 |
| Description | G-C3N4, with specific surface area up to 513 m2/g, was prepared via three successive thermal treatments at 550 °C in air with gradual precursor mass decrease. The obtained bulk and exfoliated (1ex, 2ex, and 3ex) g-C3N4 were characterized and tested as photocatalysts for H2 production, CO2 reduction, and NOx oxidation. The exfoliated samples demonstrated graphene-like morphology with detached (2ex) and sponge-like framework (3ex) of layers. The surface area increased drastically from 20 m2/g (bulk) to 513 m2/g (3ex). The band gap (Eg) increased gradually from 2.70 to 3.04 eV. Superoxide radicals (·O2−) were mainly formed under UV and visible light. In comparison to the bulk,the exfoliated g-C3N4 demonstrated significant increase in H2 evolution (~6 times), CO2 reduction (~3 times), and NOx oxidation (~4 times) under UV light. Despite the Eg widening, the photocatalytic performance of the exfoliated g-C3N4 under visible light was improved too. The results were related to the large surface area and low e−-h+ recombination. The highly exfoliated g-C3N4 demonstrated selectivity towards H2 evolution reactions. |
| Starting Page | 1147 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal10101147 |
| Journal | Catalysts |
| Issue Number | 10 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2020-10-03 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Applied Chemistry Environmental Sciences G-c3n4 Exfoliation Photocatalysis H2 Evolution Co2 Reduction Nox Oxidation |
| Content Type | Text |
| Resource Type | Article |
