Influence of alkoxide structures on formation of TiO2/WO3 heterojunctions for photocatalytic decomposition of organic compounds
| Autor: | Taeseok Choi, Jung-Sik Kim, Jung Hyeun Kim |
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| Rok vydání: | 2016 |
| Předmět: |
Steric effects
Spin coating Materials science Band gap General Chemical Engineering Composite number Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences 0104 chemical sciences Crystal chemistry.chemical_compound chemistry Mechanics of Materials Alkoxide Photocatalysis 0210 nano-technology |
| Zdroj: | Advanced Powder Technology. 27:2061-2065 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2016.07.016 |
| Popis: | Reducing recombination and lowering band gap can be achieved with heterostructured photocatalysts, and the TiO 2 photocatalyst film coupled with WO 3 component maintains its advantageous characteristics. In order to investigate the effect of molecular structures on heterojunction formation, the three types of TiO 2 precursors were used to make TiO 2 /WO 3 heterojunction. The TiO 2 /WO 3 composite films with high transmittance were successfully fabricated by the sol–gel spin coating method. Formation of Ti–O–W linkage was preferable from the precursor with small steric hindrance, and it was confirmed with the well scattered WO 3 components in TiO 2 crystal matrix and also with reduced TiO 2 crystal size. High portion of Ti–O–W bond resulted in the most effective photocatalytic activity. Therefore, it is important to use a proper precursor to improve photodecomposition efficiency in manufacturing the heterostructured photocatalysts. |
| Databáze: | OpenAIRE |
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