Preparation and performance of Fe3O4@hydrophilic graphene composites with excellent Photo-Fenton activity for photocatalysis
| Autor: | Liu Xuelong, Yang Liu, Lihui Zheng, Shaobo Qiu, Liqiu Wang, Zhang Xiaobo, Qi Sun, Pengjun Wang |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Graphene Mechanical Engineering Inorganic chemistry Energy conversion efficiency Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention Catalysis Catalytic cycle Mechanics of Materials law Photocatalysis General Materials Science Absorption (chemistry) Composite material 0210 nano-technology Photodegradation |
| Zdroj: | Materials Letters. 183:61-64 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2016.07.080 |
| Popis: | Composites (Fe 3 O 4 @HG) of hydrophilic graphene (HG) and Fe 3 O 4 from an iron precursor of FeC1 3 ·6H 2 O and (NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O were prepared without any organic surfactants by a facile chemical co-precipitation method. Fe 3 O 4 nanoparticles in Fe 3 O 4 @HG were about 15 nm in dimension and were ultra-dispersed on HG nanosheets. Fe 3 O 4 @HG exhibited paramagnetic characteristic and better stability in water. Photo-Fenton reaction results demonstrated that Fe 3 O 4 @HG composites could degrade methyl-orange (MO) dye with high efficiency in a short time. When the loading capacity of HG in Fe 3 O 4 @HG composites was 53.81 wt%, the catalytic efficiency could reach 87.68% after 30 min and the catalytic rate could be 0.055 mg min −1 in the first five minutes. A possible catalytic cycle for Fe 3 O 4 @HG catalyzed photo degradation of the dye was elucidated. The photo-generated electrons were transferred rapidly on the surface of HG and promoted the conversion efficiency of Fe 3+ /Fe 2+ due to the good absorption and electronic conductivity of HG. The composites would be applied as photo-catalysts for treatment of wastewater. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect