Optical properties of hierarchical-nanostructured TiO{sub 2} and its time-dependent photo-degradation of gaseous acetaldehyde
- College of Nanoscience and Nanotechnology, Pusan National University, Busan 609-735 (Korea, Republic of)
- Division of Nano and Bio Technology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 711-873 (Korea, Republic of)
- Division of High Technology Materials Research, Korea Basic Science Institute, Busan 618-230 (Korea, Republic of)
The TiO{sub 2} hierarchical nanostructures (HNs) composed of rutile TiO{sub 2} nanowires on anatase TiO{sub 2} nanofibers had higher photocatalytic activities of 62% and 48% than the commercial TiO{sub 2} nanoparticles (∼21 nm diameter) in the continuous flow mode and closed-circulation mode, respectively, leading to an efficient degradation of gaseous acetaldehyde under UV-light irradiation. This behavior may be attributed to the effective TiO{sub 2} HNs with specific surface area of 85.1 m{sup 2}/g and lower radiative recombination of self-trapped excitons, enabling an effective electron-hole separation.
- OSTI ID:
- 22217709
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 26 Vol. 103; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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