Construction of broad-spectrum photocatalyst films through interface engineering: Orchestrating Bi nanoparticles in TiO2/BiVO4 Z-scheme heterojunctions
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引用次数: 0
Abstract
We successfully synthesized three-layered photocatalysts by modifying Bi nanoparticles on TiO2/BiVO4 bilayer composite films through a sol-gel process and sputtering. When exposed to ambient air, the surface of the prepared Bi nanoparticles oxidizes to form an amorphous ultra-thin Bi2O3 out layer. Under light exposure, this layer is reduced to metallic Bi, thanks to the band alignment between the Bi nanoparticles and TiO2/BiVO4 Z-scheme composite. The addition of Bi nanoparticles in the composite films improves visible-light absorption by the surface plasmon resonance (SPR), which contributes to the hot electron and enhances the photocatalytic characteristics. By constructing effective TiO2/BiVO4 Z-scheme heterostructures to facilitate photoinduced electron-hole pair separation and prevent recombination, Bi nanoparticles can efficiently capture photons and enhance the photocatalytic efficiency of semiconductors through the SPR effect. Optimizing the content of Bi nanoparticles decorated on the TiO2/BiVO4 Z-scheme composite film is a promising approach for designing a highly efficient photocatalyst, as evidenced by the performance of photoelectrochemical properties and RhB photodegradation ability.
我们通过溶胶-凝胶工艺和溅射法在 TiO2/BiVO4 双层复合膜上改性 Bi 纳米粒子,成功合成了三层光催化剂。当暴露在环境空气中时,制备的 Bi 纳米粒子表面会氧化形成无定形的超薄 Bi2O3 外层。在光照下,由于 Bi 纳米粒子和 TiO2/BiVO4 Z 型复合材料之间的带排列,该层被还原成金属 Bi。在复合薄膜中加入 Bi 纳米粒子可通过表面等离子体共振(SPR)改善可见光吸收,从而产生热电子并增强光催化特性。通过构建有效的 TiO2/BiVO4 Z 型异质结构来促进光诱导的电子-空穴对分离并防止重组,Bi 纳米粒子可以有效地捕获光子,并通过 SPR 效应提高半导体的光催化效率。从光电化学性质和 RhB 光降解能力的表现来看,优化装饰在 TiO2/BiVO4 Z 型复合薄膜上的 Bi 纳米粒子的含量是设计高效光催化剂的一种可行方法。
期刊介绍:
In 1985, the Journal of Science was founded as a platform for publishing national and international research papers across various disciplines, including natural sciences, technology, social sciences, and humanities. Over the years, the journal has experienced remarkable growth in terms of quality, size, and scope. Today, it encompasses a diverse range of publications dedicated to academic research.
Considering the rapid expansion of materials science, we are pleased to introduce the Journal of Science: Advanced Materials and Devices. This new addition to our journal series offers researchers an exciting opportunity to publish their work on all aspects of materials science and technology within the esteemed Journal of Science.
With this development, we aim to revolutionize the way research in materials science is expressed and organized, further strengthening our commitment to promoting outstanding research across various scientific and technological fields.