Effect of graphene size on the photocatalytic activity of TiO2/poly(3-hexylthiophene)/graphene composite films
| Autor: | Thien-Phap Nguyen, L. Jiang, F. Massuyeau, Y. Dan, P. Le Rendu, Y. Song |
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| Přispěvatelé: | Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Laboratory of Image Science and Technology [Nanjing] (LIST), Southeast University [Jiangsu]-School of Computer Science and Engineering, DEPARTMENT OF ELECTRONIC ENGIN, City University of Hong Kong [Hong Kong] (CUHK) |
| Rok vydání: | 2019 |
| Předmět: |
Photoluminescence
Materials science Composite number 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis law.invention chemistry.chemical_compound symbols.namesake law Absorption (electromagnetic radiation) ComputingMilieux_MISCELLANEOUS chemistry.chemical_classification Graphene General Chemistry Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering Titanium dioxide [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Photocatalysis symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | Catalysis Today Catalysis Today, Elsevier, 2019, 321-322, pp.74-80 |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2018.04.045 |
| Popis: | For improving the photocatalytic activity of titanium dioxide (TiO2), the use of appropriate conjugated polymers such as poly(hexylthiophene) (P3HT) to form composites with TiO2 can extend the absorption for the light harvesting. Such photocatalytic materials also have a high charge separation ability, which increases the photocatalytic reaction. Besides, to reduce the electron-hole recombination rates, which impact strongly the photocatalytic performance, graphene by its high electrical conductivity, can be incorporated to the P3HT/TiO2 composites in order to improve the charge transport in the materials. However, the effects of the graphene size on the photocatalytic behavior of composites have not been much studied so far. In this work, we have investigated P3HT/graphene composites and we examined the effect of the graphene size on the morphology and optical properties of the materials. Optical characterizations using, Raman, Infrared, absorption, steady and time resolved photoluminescence have been performed on composites synthesized with different graphene sizes (expressed by graphene weight per surface unit). It has been shown that their properties depend on the graphene concentration and also on its size. Based on these results and analyses, we studied the photocatalytic activities of TiO2/P3HT/graphene composite films through the degradation processes of a rhodamine solution under visible light irradiation in the presence of the composites. Highest performance was provided by composite samples containing graphene of medium size (150 m2/g). The improvement of photocatalytic activity of these composites is related to an increase in contact surface between graphene and polymer resulting in a better charge transfer between materials, enhancing thus their performance. |
| Databáze: | OpenAIRE |
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