Hydroxylation and sodium intercalation on g-C3N4 for photocatalytic removal of gaseous formaldehyde
| Autor: | Keizo Nakagawa, Wei-Fan Tsai, Wei-Han Wei, Miao-Ting Liu, Chechia Hu, Kun-Yi Andrew Lin |
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| Rok vydání: | 2021 |
| Předmět: |
Gaseous formaldehyde
Hydrogen bond Sodium Inorganic chemistry Intercalation (chemistry) chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Hydroxylation chemistry.chemical_compound Electron transfer Adsorption chemistry Photocatalysis General Materials Science 0210 nano-technology |
| Zdroj: | Carbon. 175:467-477 |
| ISSN: | 0008-6223 |
| Popis: | In this study, hydroxyl-modified/Na-intercalated g-C3N4 was used as an effective material for the removal of gaseous formaldehyde (HCHO) through adsorption and photocatalytic oxidation. In a simple reflux reaction using different NaOH concentrations, the surface-grafted hydroxyl (‒OH) groups of g-C3N4 formed internal hydrogen bonds with gaseous HCHO, while the Na atoms intercalated into the layered structure of g-C3N4 to create an electron transfer path (layer‒Na‒layer) to improve charge separation for photocatalytic oxidation. The hydroxylation as well as Na intercalation of g-C3N4 significantly increased its HCHO removal efficiency compared with that of bare g-C3N4. The HCHO removal capacity of the modified g-C3N4 reached approximately 0.12 ppm g−1 min−1, which was twice that of bare g-C3N4 ( |
| Databáze: | OpenAIRE |
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