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Mesoporous TiO2/g-C3N4 Microspheres with Enhanced Visible-Light Photocatalytic Activity
| Content Provider | Semantic Scholar |
|---|---|
| Author | McMaster, William A. Tan, Jeannie Ziang Yie Chen, Dehong Caruso, Rachel A. |
| Copyright Year | 2017 |
| Abstract | Designing a heterojunction semiconductor is an efficient strategy to extend the light response of a photocatalyst to the visible range and thus improve photocatalytic activity. Starting with mesoporous anatase TiO2 microspheres, mesoporous TiO2/g-C3N4 microspheres were prepared via a facile nanocoating procedure, with the porous TiO2 as the active supporting scaffold and g-C3N4 (3 wt %) as the visible light sensitizer. Heterojunctions formed at the TiO2/g-C3N4 interfaces separated photogenerated charges. The TiO2 surface (64.4 m2 g–1) was mostly covered by a photoactive g-C3N4 layer, while the interconnected porous network featured a large pore volume (0.30 cm3 g–1) for mass diffusion. The g-C3N4 precursor, cyanamide, a nitrogen-rich molecule, also acted as a nitrogen source to form TiO2–xNx. Substitution of N in the TiO2 lattice triggered a visible light response due to an additional N level above the TiO2 valence band that resulted in band gap narrowing to 1.5 eV. Compared with mesoporous g-C3N4, the co... |
| Starting Page | 22114 |
| Ending Page | 22122 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1021/acs.jpcc.7b06493 |
| Volume Number | 121 |
| Alternate Webpage(s) | http://pdf.xuebalib.com:1262/3r53Ibw4yDSf.pdf |
| Alternate Webpage(s) | https://doi.org/10.1021/acs.jpcc.7b06493 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
