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2017 Vol.27, Issue 6 Preview Page
Synthesis and Optical Properties of TiO2/TiOF2 Composite Powder with Controlled Phase Fractions via an Ultrasonic Spray Pyrolysis Process

초음파 분무 열분해 공정을 이용한 TiO2와 TiOF2 복합체 분말의 합성과 상 분율에 따른 광학적 성질

Young Hwangbo
,
Woo-Young Park
,
Young-In Lee†
황 보영
,
박 우영
,
이 영인†
Department of Materials Science and Engineering, Seoul National University of Science and Technology, Seoul 01811, Republic of Korea
서울과학기술대학교 신소재공학과
†Corresponding author E-Mail : youngin@seoultech.ac.kr (Y.-I. Lee, Seoul Nat'l Univ. Sci. Technol.)
June 2017. pp. 325-330
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Abstract

Photoelectron-hole separation efficiency plays an important role in the enhancement of the photocatalytic activity of photocatalysts towards the degradation of organic molecules. In this study, TiO2/TiOF2 heterostructured composite powders with suitable band structures, which structures are able to separate photoelectron-hole pairs, have been synthesized using a simple and versatile ultrasonic spray pyrolysis process. In addition, their phase volume fractions have been controlled by varying the pyrolysis temperature from 400 °C to 800 °C. The structural and optical properties of the synthesized powders have been characterized by X-ray diffraction, scanning electronic microscopy and UV-vis spectroscopy. The powder with a phase volume ratio close to 1, compared with single TiOF2 and other composite powders with different phase volume fractions, was found to have superior photocatalytic activity for the degradation of rhodamine B. This result shows that the TiO2/TiOF2 heterostructure promotes the separation of the photoinduced electrons and holes and that this powder can be applicable to environmental cleaning applications.

Keywords
TiO2/TiOF2
heterostructures
composite
spray pyrolysis
photocatalyst
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 27
  • No :6
  • Pages :325-330
  • Received Date : 2017-03-20
  • Revised Date : 2017-03-29
  • Accepted Date : 2017-03-30
  • DOI :https://doi.org/10.3740/MRSK.2017.27.6.325
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