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- Title
Carbon-dot-modified TiO<sub>2−x</sub> mesoporous single crystals with enhanced photocatalytic activity for degradation of phenol.
- Authors
Zhang, Weiwei; Zhou, Yi; Dong, Chunyang; Shen, Bin; Xing, Mingyang; Zhang, Jinlong
- Abstract
We introduce a facile method to synthesize carbon quantum dots/titanium dioxide mesoporous single crystals (CQDs-MSCs). CQDs were synthesized using a pyrolysis method with citric acid as carbon precursor. V-CQDs-MSCs composite was prepared using a vacuum activation method and exhibited enhanced photocatalytic activity. The composites were characterized by diffuse reflectance spectroscopy (DRS), electron paramagnetic resonance (EPR), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) analysis, and thermogravimetry (TG) analysis. XPS results indicated that CQDs were bonded on the surface of MSCs by formation of Ti-O-C bonds, which played an important role in transfer of photogenerated electrons from Ti3+-TiO2 to CQDs. V-CQDs-MSCs obtained using CQD loading content of 2% and vacuum activation temperature of 600 °C showed the highest photocatalytic activity for degradation of phenol under simulated solar light irradiation.
- Subjects
TITANIUM oxides; SINGLE crystals spectra; PHOTOREDUCTION; PYROLYSIS; X-ray diffraction
- Publication
Research on Chemical Intermediates, 2018, Vol 44, Issue 8, p4797
- ISSN
0922-6168
- Publication type
Article
- DOI
10.1007/s11164-018-3269-4