Fabricating heterostructures has been recognized as an effective strategy to improve visible-light photocatalytic H₂ production performance. Therefore, a simple approach based on combining template-assisted liquid-phase deposition and hydrothermal techniques was introduced to synthesize BiVO₄-TiO₂/reduced graphene oxide (rGO) heterostructure nanocomposites. The ternary hetero-nanostructures were composed of TiO₂ nanotubes, with an average diameter of 100 nm and tens micrometers in length, BiVO₄ nanoparticles and various amounts of rGO nanosheets. The highest photocatalytic H₂ production rate of 1427.1 μmol.h ^− 1 g ^− 1 with an apparent quantum yield of 6.4% at 420 nm was achieved at optimum rGO content (3 wt.%) under visible-light irradiation, which was 2.5 and 1.5 times higher than that of TiO₂ nanotubes)563.5 μmol.h ^− 1 g ^− 1) and BiVO₄-TiO₂ (915.7 μmol.h ^− 1 g ^− 1), respectively. The excellent enhancing effect of rGO on photocatalytic performance of the heterojunction formed between these materials was attributed to the large surface area, light absorption capacity due to band gap engineering, and separation of photo-generated charge carriers. It demonstrates the design of the ternary BiVO₄-TiO₂/rGO hetero-nanostructures that was proposed in the present strategy could effectively separate the electron-hole pairs for sustainable photocatalytic H₂ production, as was verified by PL, TRF and EIS photospectroscopy measurements.

制备异质结构已被认为是改善可见光光催化H ₂生产性能的有效策略。因此，引入了一种基于模板辅助液相沉积与水热技术相结合的简单方法来合成BiVO ₄ -TiO ₂ /还原氧化石墨烯（rGO）异质结构纳米复合材料。三元杂纳米结构由平均直径为100 nm，长度为数十微米的TiO ₂纳米管，BiVO ₄纳米颗粒和各种数量的rGO纳米片组成。最高的光催化H ₂产生速率为1427.1μmol。h  ^{-  1} 克 ^- 在可见光照射下，在最佳rGO含量（3 wt。％）下，在420 nm处的表观量子产率为¹，达到了最佳的rGO含量（3 wt。％），是TiO ₂纳米管563.5μmol的2.5和1.5倍。ħ  ^{-  1} 克 ^{-  1}）和BiVO ₄ -TiO ₂（915.7微摩尔。ħ  ^{-  1} 克 ^{-  1}）， 分别。rGO对这些材料之间形成的异质结的光催化性能的出色增强作用归因于大表面积，带隙工程引起的光吸收能力以及光生载流子的分离。它证明了本策略中提出的三元BiVO ₄ -TiO ₂ / rGO异质纳米结构的设计可以有效分离电子-空穴对，以实现可持续的光催化H ₂生成，这已通过PL，TRF和EIS光谱学测量得到了证实。 。