Graphene/TiO2 hydrogel: a potential catalyst to hydrogen evolution reaction
| Autor: | Juliet Q. Dalagan, Virgil Christian G. Castillo |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Hydrogen Graphene Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Catalysis Titanium oxide chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials law Self-healing hydrogels Organic chemistry General Materials Science Graphite 0210 nano-technology Graphene oxide paper |
| Zdroj: | Bulletin of Materials Science. 39:1461-1466 |
| ISSN: | 0973-7669 0250-4707 |
| DOI: | 10.1007/s12034-016-1293-9 |
| Popis: | In this study, graphene was synthesized from graphite. Graphite was oxidized via modified Hummer’s method and sonicated to form graphene oxide (GO). Infrared spectroscopy revealed the successful oxidation of graphite by the emergence of oxygen functionalities. The spectrum of GO showed peaks at 3270, 1629, 1227 and 1096 cm−1, indicating O–H, C=O, C–OH and C–O–C functional groups, respectively. Graphene hydrogels were prepared by the addition of L-ascorbic acid to GO suspensions and subsequent heating at 90∘C. Composite hydrogels of graphene and titanium (IV) oxide (TiO2) were synthesized with various TiO2 to GO mass ratios. Composites were applied to photocatalytic hydrogen evolution reaction (HER) and the hydrogen gas produced was analysed by gas chromatography with thermal conductivity detector. Highest HER yield was 66.00% H2. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|