| Summary: | 博士 === 雲林科技大學 === 工程科技研究所博士班 === 98 === This study utilizes a granule photocatalysts supported by zeolite column system to evaluate the photodegradation efficiency of 4,4’-isopropylidenediphenol (BPA). This study was compared the photodegration within TiO2/zeolite (as TZ) and Cu2O/ TiO2/zeolite (as CTZ) of granule photocatalysts.
The result showed that the surface of catalyst generated -OH groups that measured by FTIR and the electricity hole would react with -OH groups to generated oxyhydrogen radicals. In photodegradation efficiency, the photodegradation efficiency of TZ (60/40 wt%) was the best under 254 and 365 nm irradiation. In CTZ catalyst systems, the k values of pseudo-first-order kinetics of 20 CTZ catalyst (3.04 × 10-2 min-1) is higher than 2 times compared to TZ (60/40 wt%) (1.51 × 10-2 min-1). The result showed that TiO2 combined with Cu2O can generated interparticle electron transfer (IEPT) and reduced the e-/h+ recombination.
BPA has a complex chemical structure and the intermediates of its photodegradation were p-HBA acid, p-HBA, p-HAP and HQ. The p-HBA acid and p-HAP were generated HQ under photodegradation reaction. The result showed that BPA have to photodegreded a long time to achieved the mineralization efficiency.
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