Abstract

This study consist the production of Q-ZnPc/TiO₂ nanocomposites using two quaternized zinc phthalocyanine molecules as sensitizer using sol–gel procedure. Water soluble non-peripheral and peripheral zinc(II)-phthalocyanine compounds; namely (Q-ZnPc)_N and (Q-ZnPc)_P; have been specially designed to increase the polarity of the macrocycle. Geometric orientation and polarity are important parameters for production of effective dye-sensitized TiO₂ nanocomposites. The enhanced photocatalytic properties have been tested for methylene blue (MB, 10 mg/L) and chromium (VI)(10 mg/L) ions as model pollutant compounds using UV light (≥365 nm, 6 W) at 1 g/L catalyst mass. The nanoparticles were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). (Q-ZnPc)_P/TiO₂ has anatase crystal structure while (Q-ZnPc)_N/TiO₂ has amorphous character. These macromolecules seem to be effecting the orientation of the catalyst. Produced catalysts were so effective for both model pollutants that total degradation was achieved after 30 min exposure for Cr(VI) and almost 93.57% of MB was decomposed within 90 min exposure. Moreover, Cr(VI) removal% was extremely high even dark conditions.

中文翻译：

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新型季铵化水溶性酞菁锌衍生物在TiO 2有效染料敏化中的应用

摘要

这项研究包括使用两个季铵化酞菁锌分子作为敏化剂，通过溶胶-凝胶法生产Q-ZnPc / TiO ₂纳米复合材料。水溶性非周边和周边锌（II）-酞菁化合物；（Q-ZnPc）_N和（Q-ZnPc）_P; 专门设计用于增加大环的极性。几何取向和极性是生产有效的染料敏化TiO _2的重要参数纳米复合材料。使用1 g / L的紫外线（≥365nm，6 W）对作为模型污染物的亚甲基蓝（MB，10 mg / L）和铬（VI）（10 mg / L）离子测试了增强的光催化性能催化剂质量。通过X射线衍射（XRD）和扫描电子显微镜（SEM）表征纳米颗粒。（Q-ZnPc）_P / TiO ₂具有锐钛矿晶体结构，而（Q-ZnPc）_N / TiO ₂具有无定形特征。这些大分子似乎正在影响催化剂的取向。所生产的催化剂对两种模型污染物均如此有效，以至于暴露于Cr（VI）30分钟后完全降解，暴露90分钟内将近93.57％的MB分解。此外，即使在黑暗条件下，Cr（VI）的去除率也极高。