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Title: Optical properties of hierarchical-nanostructured TiO{sub 2} and its time-dependent photo-degradation of gaseous acetaldehyde

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.
Authors:
; ;  [1] ; ; ;  [2] ; ;  [3]
  1. College of Nanoscience and Nanotechnology, Pusan National University, Busan 609-735 (Korea, Republic of)
  2. Division of Nano and Bio Technology, Daegu Gyeongbuk Institute of Science and Technology, Daegu 711-873 (Korea, Republic of)
  3. Division of High Technology Materials Research, Korea Basic Science Institute, Busan 618-230 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22217709
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 26; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ACETALDEHYDE; EXCITONS; HOLES; IRRADIATION; OPTICAL PROPERTIES; PHOTOCATALYSIS; QUANTUM WIRES; RUTILE; SEMICONDUCTOR MATERIALS; SPECIFIC SURFACE AREA; TIME DEPENDENCE; TITANIUM OXIDES; ULTRAVIOLET SPECTRA