Visible-Light-Responsive Porphyrin-Incorporated TiO2 Treatment of Diatom Matrix
- Authors
- Kim, Yoon-Soo; Lee, Young-Chul; Lee, Hyun Uk; Huh, Yun Suk; Shin, Hyun-Jae
- Issue Date
- Sep-2016
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Porphyrin; Titanium Dioxide; Diatom; Hydrothermal Reaction; Photocatalytic Activity
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.16, no.9, pp.9699 - 9707
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 16
- Number
- 9
- Start Page
- 9699
- End Page
- 9707
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/7904
- DOI
- 10.1166/jnn.2016.12038
- ISSN
- 1533-4880
- 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, lambda = 365 nm) and light-emitting diode (LED, lambda > 420 nm wavelength) irradiation, along with the hydroxyl ((OH)-O-center dot) and superoxide (O-center dot(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 m(2)/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)-O-center dot and O-center dot(2)- radical detection according to the electron spin resonance (ESR)
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