Abstract
In the present study, porphyrin-incorporated TiO2 was prepared and treated onto a diatom matrix by hydrothermal reaction. The photocatalytic activities under ultraviolet (UV, λ = 365 nm) and lightemitting diode (LED, λ>420 nm wavelength) irradiation, along with the hydroxyl (OH) and superoxide (O-2) radical-generation mechanisms, was observed. The optimal TiO2 loading onto the diatom matrix (T-D) was found to include a Ti/Si ratio of 0.444 and a BET surface area of 39.65 m2/g. The porphyrin/T-D photocatalytic activities by UV-and LED-light irradiation for the Orange II dye solution showed optimal apparent rate constants in Fe(III) meso-tetra(4-carboxyphenyl)porphine chloride (Fe-TCPP)/T-D, as evidenced by OH and O-2 radical detection according to the electron spin resonance (ESR) spectra.
| Original language | English |
|---|---|
| Pages (from-to) | 9699-9707 |
| Number of pages | 9 |
| Journal | Journal of Nanoscience and Nanotechnology |
| Volume | 16 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 2016 |
Bibliographical note
Publisher Copyright:© Copyright 2016 American Scientific Publishers.
Keywords
- Diatom
- Hydrothermal Reaction
- Photocatalytic Activity
- Porphyrin
- Titanium Dioxide