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报道了酞菁钴(CoPc)分子原位自组装于纳米 SnO2 颗粒表面, CoPc 大环分子与 SnO2 表面形成 Co—O轴向相互作用, 测定了原位合成方法(标记为 i)制备的 CoPc/SnO2(i)与浸渍法(标记为 d)制备 CoPc/SnO2(d)间的结合特性, 并进行了可见光光催化表征及 CoPc 敏化机理探讨. 结果表明, 在结合位点数相当的情况下, CoPc/SnO2(i)结合常数比 CoPc/SnO2(d)的高两个数量级, 前者的光催化效率亦比后者高 32.5%(光照 150 min), 且 CoPc/SnO2(i)光催化稳定性较高(重复十次循环使用). 其 CoPc 敏化 SnO2 的机理为, 由于敏化剂与半导体之间存在的强相互作用, 不仅增强了光生电荷在 CoPc 的 LUMO 与 SnO2 半导体导带间的导入效率及光生电荷对的分离效率, 而且提高了敏化剂的负载稳定性与循环光催化效率的持续性.
Reported CoPc molecules self-assembled on the surface of nano-SnO2 particles and the Co-O axial interaction between the CoPc macrocycles and the surface of SnO2 was reported. The in-situ synthesis of CoPc / The binding properties of SnO2 (i) to CoPc / SnO2 (d) prepared by impregnation method (labeled as d) were investigated by visible light photocatalytic spectroscopy and CoPc sensitization mechanism. The results showed that under the condition of the same number of binding sites, The CoPc / SnO2 (i) binding constants are two orders of magnitude higher than that of CoPc / SnO2 (d), and the former is 32.5% higher photocatalytic efficiency (150 min illumination). The photocatalytic stability of CoPc / SnO2 (Repeated ten cycles) .The mechanism by which CoPc sensitizes SnO2 is that due to the strong interaction between the sensitizer and the semiconductor, not only the introduction of photogenerated charge between the LUMO of CoPc and the conduction band of the SnO2 semiconductor is enhanced Efficiency and photoionization charge separation efficiency, but also improve the load stability of sensitizers and the continuity of the photocatalytic efficiency of the cycle.