Broadening the photoresponsive activity of anatase titanium dioxide particles via decoration with partial gold shells
| Autor: | Han Ju Lee, Chengzhi Cai, T. Randall Lee, Tai Chou Lee, Oussama Zenasni, Orawan Khantamat, Si Ping Liu, Tingting Liu, Chien-Hung Li |
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| Rok vydání: | 2018 |
| Předmět: |
Anatase
Materials science Dispersity Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Titanium nitride 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Amorphous solid Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry chemistry Chemical engineering Nano Titanium dioxide Photocatalysis 0210 nano-technology Visible spectrum |
| Zdroj: | Journal of Colloid and Interface Science. 513:715-725 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2017.10.053 |
| Popis: | Titanium dioxide (TiO 2 ) has gained increasing interest in materials research due to its outstanding properties and promising applications in a wide range of fields. From this perspective, we report the synthesis of custom-designed anatase TiO 2 submicrometer particles coated with partial Au shells (ATiO 2 -AuShl). The synthetic strategy used herein yields uniformly shaped monodisperse particles. Amorphous TiO 2 core particles were synthesized using template-free oxidation and hydrolysis of titanium nitride (TiN); subsequent hydrothermal treatment generated anatase TiO 2 (ATiO 2 ) particles. Coating ATiO 2 particles with partial Au shells was accomplished using a simple seeded-growth method. Evaluation of the optical properties of these ATiO 2 -AuShl particles showed that these submicrometer composites exhibited an intense absorption peak for TiO 2 in the UV region (∼326 nm) and a broad extinction band in the visible range (∼650 nm) arising from the incomplete Au shell. These ATiO 2 -AuShl composite particles provide a unique and effective means for broadening the optical response of TiO 2 -based nano- and micron-scale materials. The simplicity of our synthetic method should broaden the application of ATiO 2 -AuShl particles in various visible light-driven technologies. |
| Databáze: | OpenAIRE |
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