A fish bone-like BiVO₄ film was successfully prepared in-situ on metal Bi substrate via a facile one-step hydrothermal method. The obtained BiVO₄ film exhibits excellent tetracycline photodegradation efficiency, reaching 89.7% in 240 min under visible light irradiation. Its quantum yield (6.3 × 10⁻⁵ molecules photon⁻¹) and kinetic reaction rate (7.80 μmol g⁻¹ h⁻¹) are better than most reported immobilized Bi-based systems. Finally, the formation mechanism was investigated, which suggests that OH⁻ plays a vital role in forming BiVO₄ film by affecting the release of VO₃⁻. The results of this study provide available means in the in-situ preparation of Bi-based photocatalyst film.

通过一种简便的一步水热法成功地在金属Bi衬底上原位制备了鱼骨状BiVO ₄膜。所得的BiVO ₄膜表现出优异的四环素光降解效率，在可见光照射下在240分钟内达到89.7％。其量子产率（6.3×10 ^-5分子光子^-1）和动力学反应速率（7.80μmolg ^-1  h ^-1）优于大多数报道的固定化Bi基体系。最后，将形成机理进行了研究，这表明OH ^-在形成BiVO起着至关重要的作用₄通过影响VO的离型膜₃ ^-。该研究结果为Bi基光催化剂膜的原位制备提供了可行的手段。