Shanyue He, Xin Zhang, Mei Chen, Hongquan Jiang, Yang Qu b, Yanduo Liu a,Jizhou Jiang
This study focuses on enhancing the photocatalytic performance of Ti(HPO4)2 for H2O2 synthesis. Ti(HPO4)2, an intercalated structure photocatalyst with suitable band gap energy, has great potential in photocatalytic applications. However, its performance in H2O2 photosynthesis needs improvement in oxygen reduction kinetics and electron lifetime. We employed oxygen vacancy engineering to modulate the local oxygen environment of Ti(HPO4)2. This process reconstructs the Ti3+-Ov-P structures by leveraging push-pull electronic effects to increase the electron density at Ti4+ sites, thereby enhancing O2 adsorption and activation. Moreover, we constructed an S-scheme heterojunction using WO3 as a complementary oxidative cocatalyst. This heterojunction effectively suppressed carrier recombination and preserved the intrinsic redox abilities of each component. The optimized WO3/TPOv showed remarkable performance in a pure H2O/O2 system without sacrificial agents. It exhibited a 15-fold activity enhancement over pristine TPO and achieved an SCC efficiency of 0.75%. Our work offers a novel strategy of defect and heterojunction engineering for optimizing carrier lifetime and surface reactivity in photocatalytic systems.
Composite Functional Materials (CFM), published by INTERNATIONAL SCIENCE ACCELERATOR (ISA), is an interdisciplinary journal that caters to chemists, physicists, material scientists, engineers, and biologists, focusing on the development and application of innovative composite materials. The journal publishes peer-reviewed short communications, review articles, and full-length research papers that present cutting-edge advances in composite science and technology. Articles are supported by fundamental theoretical modeling, interface engineering, and functional approaches to composite development.
The scope covers research across multiple length scales, ranging from the nanoscale to micro, meso, and full-scale product or structural levels. Emphasis is placed on composite processes aimed at high-performance applications, spanning both low-volume/high-cost and high-volume/low-cost production. This includes work that pushes the boundaries of composite materials for diverse applications, supported by advanced research in processing, performance, and functionalization.
Open Access