Bi₂WO₆ photocatalyst was hybridized with perylene diimide (PDI) via a facile water bath heating method, the composites photocatalytic oxidation of phenol and water decomposition to produce oxygen are simulated under visible light. It was found that the Bi₂WO₆/PDI composite shows the higher visible light degradation rate towards phenol than self-assembled PDI and Bi₂WO₆. What’s more, it simultaneously exhibits an enhanced oxygen production rate, which is 2 times than that of the pure self-assembled PDI. In the photocatalytic process of Bi₂WO₆/PDI composites under visible light irradiation, the position of conduction band and valence band between Bi₂WO₆ and PDI are beneficial to realize photogenerated carriers separation. In this work, we synthesized Bi₂WO₆/PDI heterojunction which is the same as most of the reported n-n type heterojunction photocatalysts, the CB and the VB levels of one are higher than the corresponding levels of the another semiconductor. A new inorganic and organic composite n-n type heterojunction was form to explain the mechanism of photocatalytic activity enhancement. Self-assembled PDI and Bi₂WO₆ surface hybridization to promote the separation of photogenerated carriers, electrons in the LUMO orbit of PDI are injected into the conduction band of the Bi₂WO₆, produced a superoxide radical-based visible light degradation activity.

通过简便的水浴加热方法将Bi ₂ WO ₆光催化剂与with二酰亚胺（PDI）杂化，在可见光下模拟了复合物对苯酚的光催化氧化和水分解产生氧气的过程。发现Bi ₂ WO ₆ / PDI复合材料比自组装的PDI和Bi ₂ WO ₆具有更高的可见光降解率。而且，它同时显示出更高的制氧速度，是纯自组装PDI的2倍。在Bi ₂ WO ₆的光催化过程中/ PDI复合材料在可见光照射下，Bi ₂ WO ₆与PDI之间的导带和价带位置有利于实现光生载流子的分离。在这项工作中，我们合成了Bi ₂ WO ₆ / PDI异质结，该异质结与大多数已报道的nn型异质结光催化剂相同，一个中的CB和VB含量高于另一种半导体中相应的含量。形成了一种新的无机和有机复合nn型异质结，以解释光催化活性增强的机理。自组装PDI和Bi ₂ WO ₆通过表面杂交促进光生载流子的分离，PDI的LUMO轨道中的电子被注入Bi ₂ WO ₆的导带中，产生了基于超氧自由基的可见光降解活性。