DBU液相催化法原位合成四苯氧基酞菁锌/ZnO复合材料的制备及光催化选择性研究

Preparation of Four Phenoxy Phthalocyanine Zinc/ZnO Composites with in-situ Method by DBU Liquid Phase Catalyst and Its Photocatalytic Selectivity

在负载于氧化铟锡(ITO)导电玻璃上、哑铃状纳米ZnO表面配位未饱和锌离子作为"模板",以苯氧基邻苯二腈作为"分子碎片",利用DBU液相催化法,在亲水性纳米ZnO表面,原位合成疏水性四苯氧基酞菁锌(ZnTPPc)。通过多种表征手段,分析证实了所合成的ZnTPPc分子结构、ZnTPPc/ZnO界面及光生电荷转移特性。在可见光下,分别以亲水性亚甲基蓝(MB)、疏水性苯酚(PL)及其混合液为待降解反应物,定量分析疏水性ZnTPPc/ZnO复合材料对降解疏水性PL的光催化选择性。结果表明:原位合成ZnTPPc在ZnO表面呈现单分子层,具有较好的疏水性能,ZnTPPc可优先选择性降解疏水性PL,且在可见光光催化中对PL的相对降解效率是对MB分子的1.21倍。

Hydrophobic four phenoxyphthalocyanine zinc(ZnTPPc)was prepared on the surface of hydrophilic ZnO nanomaterialson the indium tin oxide(ITO)conductive glasswith in-situ synthesis by using DBU as liquid phase Catalyst.ZnTPPc was cyclized with phenoxy phthalonitrile as a molecular fragment and unsaturated zinc ions with dumbbellshaped ZnO(ZnO ZDs)surface as a template.The structure of ZnTPPc molecule and the characteristics of photogenerated charge in ZnTPPc/ZnO interfacewere confirmed by a variety of characterization methods.The photocatalytic selectivity of ZnTPPc/ZnO for the degradation of hydrophobic phenol(PL)was quantitatively analyzed by using hydrophilic methylene blue(MB),hydrophobic(PL)and their mixtures.The results show that hydrophobic ZnTPPc is synthesized by in-situ method on ZnO surface,presenting a monomolecular layer.The hydrophobic PL was preferentially adsorbed by ZnTPPc,and the relative degradation efficiency of PL is 1.3 times as high as that of MB under visible light irradiation.