期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 25, 期 8, 页码 1687-1695出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(12)60216-2
关键词
mesopolymer; phthalocyanine; photocatalysis; visible light; phenolic pollutants
资金
- National Natural Science Foundation of China [21143009, 20925310]
- Natural Science Foundation of Jiangsu Education Department [09KJB150013]
- Jiangsu Fundament of Qilan Project, Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection [JLCBE07011]
- Yancheng Science and Technology Bureau [YK2009028]
A novel versatile photocatalyst, FDU-PdPcS, was prepared by immobilizing palladium phthalocyaninesulfonate (PdPcS) onto the FDU-15 mesopolymer via multi-step chemical modification processes involving chloromethylation of the FDU-15 mesopolymer first with chloromethyl methyl ether, a subsequent amination reaction with ethylenediamine, and finally modification with palladium phthalocyaninesulfonate via ionic interaction. The obtained FDU-PdPcS photocatalyst was characterized by the X-ray diffraction (XRD), UV-Vis spectrosopy and inductively coupled plasma (ICP) techniques. This photocatalyst not only affords a high dispersion of monomeric PdPcS molecules, which may further be stabilized by the pi-electron of benzene rings of FDU-15, but also provides a number of diamino groups inside the mesopores, which could be advantageous for the photodegradation of phenolic pollutants. In photodegradation studies of phenolic pollutants, the FDU-PdPcS catalyst exhibited excellent visible light photocatalytic activity and reusability. The photodegradation products of phenol and bisphenol A were investigated by the gas chromatoghraphy-mass spectrometry (GC-MS) technique. The results showed that the photodegradation products were composed of carboxylic acids and CO2. Isopropanol, sodium azide and benzoquinone were used as hydroxyl radical (OH center dot), singlet oxygen (O-1(2)) and superoxide radical (O-2(center dot-)) scavengers, respectively. The results suggested that O-1(2) and O-2(center dot-) the prominent active species during the photodegradation process. A possible mechanism for the photodegradation of phenol was also discussed.
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