The separation efficiency of photocarriers is an important part of photocatalytic efficiency. Construction of composite with good contact is a hot topic. In this work, Bi₂WO₆ is successfully connected with BiOI to form the chemical bonding interface through the same crystal unit, where a precipitation transformation phenomenon is revealed. The chemical bonding interface is conducive to transmission and separation of photocarriers to realize rapid and stable transport and separation through the interface, which is based on the photocurrent density of Bi₂WO₆/BiOI (BWOI) is about 6 and 40 times higher than Bi₂WO₆ and BiOI, and the transfer resistance of BWOI is around 5 and 10 times lower than Bi₂WO₆ and BiOI. Thus, the photocatalytic activity of BWOI is 2.8 and 33.35 times as much as those of Bi₂WO₆ and BiOI. During the photocatalysis process, photogenerated holes (h⁺) and superoxide radical (·O₂⁻) are the main oxidizers, and the constructed the chemical bonding interface displays excellent photostability.

光载流子的分离效率是光催化效率的重要组成部分。构建具有良好接触的复合材料是一个热门话题。在这项工作中，Bi ₂ WO ₆成功地与BiOI连接，通过相同的晶体单元形成化学键界面，其中揭示了沉淀转变现象。化学键合界面有利于光载流子的传输和分离，通过界面实现快速稳定的传输和分离，这是基于Bi ₂ WO ₆ /BiOI（BWOI）的光电流密度比Bi高约6和40倍₂ WO ₆和BiOI，BWOI的转移阻力比Bi ₂ WO ₆和BiOI低5倍和10倍左右。因此，BWOI的光催化活性是Bi ₂ WO ₆和BiOI的2.8倍和33.35倍。在光催化过程中，光生空穴（h ⁺）和超氧自由基（·O ₂ ^-）是主要的氧化剂，构建的化学键界面显示出优异的光稳定性。