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제125회 대한화학회 학술발표회 및 총회 Anatase-rutile synergistic effect in TiO2 photocatalysis: Charge separation yield and recombination kinetics

등록일
2020년 2월 13일 14시 39분 38초
접수번호
1576
발표코드
ENVR.P-983 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
온라인 PDF 제출
발표형식
포스터
발표분야
Environmental Energy
저자 및
공동저자
Sojung Park, Wooyul Kim1,*
Department of Chemical and Biological Engineerging, Sookmyung Women's Univeristy, Korea
1Department of Chemical and Biological Engineering, Sookmyung Women's University, Korea
Numerous studies have investigated photocatalytic, electrocatalytic properties of anatase, rutile, and TiO2 (anatase and rutile) composites; but, the detailed mechanism investigations are limited due to the short lifetime of the photogene rated charge carriers. In this study, the photo-(electrochemical) activity of slurry type and electrode type of two main crystalline were systematically investigated under acidic and basic conditions, in order to reveal the synergistic effect between anatase and rutile phase of TiO2 . In particular, the process of charge transfer between polymorphs were directly observed using time-resolved diffuse reflectance spectroscopy method. In slurry type, photocatalytic synergic effect between anatase and rutile was not observed while in electrode type system, the photo-electrochemical synergic effect was clearly represented, which is consisted with the charge transfer dynamic data from laser flash photolysis. In addition, using FT-IR spectroscopy technique, the recent result of mechanism will be discussed.

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