A Novel Green TiO2 Photocatalyst with a Surface Charge-Transfer Complex of Ti and Hydrazine Groups
| Autor: | Jilian Xu, Ran Wang, Abrar S. Alnafisah, Lei Liu, Xiaobo Chen, Nathan A. Oyler, Lihong Tian, Xinyu Tan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
business.industry
Chemistry Organic Chemistry Doping 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Catalysis 0104 chemical sciences Semiconductor Impurity Photocatalysis Molecule Surface charge 0210 nano-technology business Absorption (electromagnetic radiation) Visible spectrum |
| Zdroj: | Chemistry - A European Journal. 23:5345-5351 |
| ISSN: | 0947-6539 |
| DOI: | 10.1002/chem.201606027 |
| Popis: | The optical property of TiO2 plays an important role in its various and promising photocatalytic applications. Previous efforts in improving its optical properties include doping with various metal and/or non-metal elements, coupling with other colorful semiconductors or molecules, and hydrogenating to crystalline/disordered core/shell nanostructures. Here, we report a beautiful green TiO2 achieved by forming the charge-transfer complex of colorless hydrazine groups and surface Ti4+ , which extends the optical absorption into the near infrared region (≈1100 nm, 1.05 eV). It shows an enhanced photocatalytic performance in hydrogen generation under simulated sunlight, and degradation of organic pollution under visible light due to an impurity state (about 0.28 eV) resulting in fast electron-hole separation and injection of electrons from the ligand to the conduction band of TiO2 . This study demonstrates an alternative approach to tune the optical, impurity state and photocatalytic properties of TiO2 nanoparticles and we believe this will spur a wide interest in related materials and applications. |
| Databáze: | OpenAIRE |
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