本研究之目的乃利用紫外線(UV/TiO2)
程序光催化分解液相中環境荷爾蒙之丙二酚
-A，探討分解丙二酚-A 的較佳條件及反應機
制。另外自製複合光觸媒，探討不同的光觸
媒對光催化分解丙二酚-A 的相互關係。研究
結果顯示分解丙二酚-A 的較佳條件是在pH
7、溫度25℃、TiO2 劑量100mg、光照時間
60min 下，幾乎能完全分解濃度20mg/L 的丙
二酚-A。比較不同的光觸媒光催化分解丙二
酚-A，結果含浸純矽藻土的光觸媒光催化分
解丙二酚-A 效果較好。
以Langmuir-Hinshelwood 反應動力模式
中之擬一階反應動力式，在改變不同溫度、
TiO2 劑量、丙二酚-A 起始濃度、pH 及光觸
媒種類(含複合光觸媒)下，探討不同條件下
的反應速率常數(K)。結果發現在各種條件中
較高的反應速率常數(K)與上述分解丙二酚
-A 的較佳條件大致相同，因此光催化分解丙
二酚-A 效率會受溫度、pH、丙二酚-A 起始
濃度、TiO2 劑量及光觸媒種類(含複合光觸媒)
的影響。另外光催化分解丙二酚-A 過程會產
生中間產物，這些中間產物經由GC/MS 與
HPLC 分析，推測這些主要的中間產物應為
Acetic Acid 、HQ(hydroquinone) 及
p-HAP(4-hydroxyacetophenoe)。 The objectives of this study were to destruct
photocatalytically Bisphenol-A ( one of
endocrine disrupting chemicals ) in the aqueous
solution using UV/TiO2 process, and further
investigate its optimal conditions, reaction
mechanism and interactions with various
photocatalysts including pure TiO2 and
diatomite-impregnated TiO2. The experimental
results showed that Bisphenol-A was exactly
photodestructed under the process conditions
of initial concentration 20mg/L 、pH 7 、
temperature 25℃、TiO2 dosage 100mg and
irradiation time 60min. The destructive
performance of diatomite-impregnated TiO2
and showed to be better in comparison with
that of pure (non-impregnated) TiO2.
With respect to the reaction kinetics, the
pseudo-first order rate derived from
Largmuir-Hinshelwood model was
successfully used to describe the
photodecomposition of Bisphenol-A in the
aqueous solution under various conditions
(including temperature 、TiO2 dosage 、
Bisphenol-A initial concentration 、pH and
pure/impregnatated TiO2. On the other hand,
the main intermediate products (i.e. acetic
acid、hydroquinone and 4-hydroxyacetophenoe)
of Bisphenol-A photodegradation were
identified based on the analytical results of
GC/MS and HPLC. The photocatalytic reaction
mechanism was thus addressed to elucidate the
experimental results on the basis of
intermediate products in this study.
