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Photo-Catalysis of Refractory Organics with Nano-Semiconductors.
Date Issued
2004-07-31
Date
2004-07-31
Author(s)
DOI
922211E002065
Abstract
The photocatalytic process using TiO2 and
coupled semiconductor in the
photodegradation reaction of 4-CP was
investigated. Nanosized titanium dioxide
power was synthesized via various
procedure and modified the via coupled
photocatalysts. The microstructural and
chemical properties of titanium dioxide and
coupled cadium selenide/titanium dioxide,
stannic dioxide/titanium dioxide, tungsten
trioxide/titanium dioxide were also
examined. In the results of photocatalysis,
higher photodegradation efficiency of 4-CP
was observed at higher pH values. In
general, the coupled cadium
selenide/titanium dioxide and stannic
dioxide/titanium dioxide were unable to
perform satisfied efficiency on 4-CP
destruction. Instead, the coupled tungsten
trioxide/titanium dioxide irritated at 435 nm
visible light was able to achieve a 75%
photo-catalytical removal of 4-CP at pH 4
condition in a 180 min reaction period.
The most significant result of this
experiment is that the reaction can be
initiated under visible light situation without
using UV light.
coupled semiconductor in the
photodegradation reaction of 4-CP was
investigated. Nanosized titanium dioxide
power was synthesized via various
procedure and modified the via coupled
photocatalysts. The microstructural and
chemical properties of titanium dioxide and
coupled cadium selenide/titanium dioxide,
stannic dioxide/titanium dioxide, tungsten
trioxide/titanium dioxide were also
examined. In the results of photocatalysis,
higher photodegradation efficiency of 4-CP
was observed at higher pH values. In
general, the coupled cadium
selenide/titanium dioxide and stannic
dioxide/titanium dioxide were unable to
perform satisfied efficiency on 4-CP
destruction. Instead, the coupled tungsten
trioxide/titanium dioxide irritated at 435 nm
visible light was able to achieve a 75%
photo-catalytical removal of 4-CP at pH 4
condition in a 180 min reaction period.
The most significant result of this
experiment is that the reaction can be
initiated under visible light situation without
using UV light.
Subjects
titanium dioxide
cadium
selenide
selenide
stannic dioxide
tungsten trioxide
coupled semiconductor catalyst
4-chlorophenol
photodegradation
Publisher
臺北市:國立臺灣大學環境工程學研究所
Coverage
計畫年度:92;起迄日期:2003-08-01/2004-07-31
Type
report
File(s)
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922211E002065.pdf
Size
102.19 KB
Format
Adobe PDF
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