A novel cocatalyst free Z-schematic photocatalytic system of Ag/LaVO₄/BiVO₄ was successfully fabricated for clean hydrogen fuel evolution. The spherical nanoparticles of LaVO₄ were prepared in solution combustion method for the first time using glycine as a fuel, BiVO₄ was deposited onto LaVO₄ through a deposition–precipitation method and Ag was loaded on the surface of LaVO₄/BiVO₄ composite by photoreduction method. The composites were characterized by XRD, UV–vis DRS, SEM, TEM, EDS and XPS to ensure the successful integration of Ag or (and) BiVO₄ with LaVO₄. A series of photocatalytic H₂ evolution experiments, employing Na₂S and Na₂SO₃ as hole scavengers, showed that the Ag/LaVO₄/BiVO₄ composite exhibited a superior photocatalytic performance compared to single LaVO₄ or BiVO₄. Although BiVO₄ cannot be used for H₂ evolution, it can significantly enhance the H₂ evolution performance of LaVO₄ through a Z-scheme mechanism with Ag as an electron mediator. Moreover, investigations on photoluminescence and fluorescence lifetime measurements demonstrated the greater separation efficacy of photoinduced excitons in the Z-scheme Ag/LaVO₄/BiVO₄ photocatalytic system. This newly constructed LaVO₄ based Z-scheme system exhibits promising photocatalytic H₂ evolution activity with significant longevity and will be useful for potential applications in energy driven technologies.

成功制备了新型的无助催化剂的Ag / LaVO ₄ / BiVO _4的无Z催化光催化体系，用于清洁氢燃料的产生。首次以甘氨酸为燃料，通过固溶燃烧法制备了LaVO ₄的球形纳米颗粒，通过沉积-沉淀法将BiVO ₄沉积在LaVO _4上，并通过以下方法将Ag负载在LaVO ₄ / BiVO ₄复合材料的表面上：光还原法。通过XRD，UV-vis DRS，SEM，TEM，EDS和XPS对复合材料进行表征，以确保Ag或（和）BiVO ₄与LaVO ₄的成功结合。一系列光催化H ₂用Na ₂ S和Na ₂ SO ₃作为空穴清除剂的演化实验表明，与单一的LaVO ₄或BiVO ₄相比，Ag / LaVO ₄ / BiVO ₄复合材料表现出优异的光催化性能。尽管BiVO ₄不能用于H ₂析出，但它可以通过以Ag为电子介体的Z方案机理显着增强LaVO ₄的H ₂析出性能。此外，对光致发光和荧光寿命测量的研究表明，Z型Ag / LaVO中光诱导激子的分离效果更好。₄ / BiVO ₄光催化体系。这种新构建的基于LaVO ₄的Z方案系统显示出有希望的光催化H ₂放出活性，寿命长，并且可用于能源驱动技术中的潜在应用。