Sulphonated cobalt phthalocyanine-MCM-41: an active photocatalyst for degradation of 2,4-dichlorophenol.
Sulphonated cobalt phthalocyanine-MCM-41: an active photocatalyst for degradation of 2,4-dichlorophenol.
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DOI：
10.1016/j.jhazmat.2009.10.108
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发表时间：
2010-03
影响因子：
13.6
通讯作者：
M. A. Zanjanchi;A. Ebrahimian;M. Arvand
中科院分区：
文献类型：
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作者：
M. A. Zanjanchi;A. Ebrahimian;M. Arvand
研究了固定在 MCM-41 上的磺化钴酞菁对水溶液中 2,4-二氯苯酚 (2,4-DCP) 分解的光催化活性。通过后合成方法将 3-(氨丙基)-三乙氧基硅烷 (APTES) 预锚定到 MCM-41 上，将阴离子磺基钴酞菁固定到 MCM-41 壁上。采用X射线衍射、氮气物理吸附、漫反射光谱、能量色散X射线和FT-IR等方法对产物进行了表征。在UV-A和可见光照射下测试了所制备的催化剂降解2,4-DCP的光催化效率。所得结果表明该光催化剂对2,4-DCP的降解非常活跃。使用剂量为0.6g/L的催化剂，在紫外线照射下，光降解过程在3h内完成。该反应遵循伪一级动力学，观察到的速率常数值随 2,4-DCP 浓度的变化而变化。测试了催化剂的再现性。通过气相色谱-质谱（GC-MS）技术鉴定反应中间体。
The photocatalytic activity of sulphonated cobalt phthalocyanine immobilized onto MCM-41 was investigated for decomposition of 2,4-dichlorophenol (2,4-DCP) in aqueous solutions. Immobilization of anion sulpho-cobalt phthalocyanine to the walls of MCM-41 was performed by pre-anchorage of 3-(aminopropyl)-triethoxysilane (APTES) onto MCM-41 via post-synthesis method. X-ray diffraction, nitrogen physisorption, diffuse reflectance spectroscopy, energy-dispersive X-ray and FT-IR methods were used to characterize the product. Photocatalytic efficiency of the prepared catalyst for degradation of 2,4-DCP was tested under illumination of UV-A and visible light. The results obtained reveal that the photocatalyst is very active in degradation of 2,4-DCP. The photodegradation process is completed within 3h using a dose of 0.6g/L of the catalyst under UV irradiation. The reactions follow a pseudo-first-order kinetics and the observed rate constant values change with 2,4-DCP concentrations. The reproducibility of the catalyst was tested. The reaction intermediates were identified by gas chromatoghraphy–mass spectrometery (GC–MS) technique.