State Key Laboratory of Material Processing and Die & Mould Technology, Nanomaterials and Smart Sensors Laboratory, Department of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China.
Sci Rep. 2013;3:2409. doi: 10.1038/srep02409.
A major drawback of traditional photocatalysts like TiO2 is that they can only work under illumination, and the light has to be UV. As a solution for this limitation, visible-light-driven energy storage photocatalysts have been developed in recent years. However, energy storage photocatalysts that are full-sunlight-driven (UV-visible-NIR) and possess long-lasting energy storage ability are lacking. Here we report, a Pt-loaded and hydrogen-treated WO3 that exhibits a strong absorption at full-sunlight spectrum (300-1,000 nm), and with a super-long energy storage time of more than 300 h to have formaldehyde degraded in dark. In this new material system, the hydrogen treated WO3 functions as the light harvesting material and energy storage material simultaneously, while Pt mainly acts as the cocatalyst to have the energy storage effect displayed. The extraordinary full-spectrum absorption effect and long persistent energy storage ability make the material a potential solar-energy storage and an effective photocatalyst in practice.
传统光催化剂如 TiO2 的一个主要缺点是它们只能在光照下工作，而且光必须是 UV 光。为了解决这个限制，近年来已经开发出可见光驱动的储能光催化剂。然而，缺乏全阳光驱动（UV-可见-NIR）并具有持久储能能力的储能光催化剂。在这里，我们报告了一种负载 Pt 和经过氢气处理的 WO3，它在全阳光谱（300-1000nm）下表现出很强的吸收，并且具有超过 300 小时的超长储能时间，可以在黑暗中使甲醛降解。在这个新材料系统中，经过氢气处理的 WO3 同时作为光收集材料和储能材料，而 Pt 主要作为助催化剂来显示储能效果。非凡的全光谱吸收效果和持久的储能能力使该材料成为一种有潜力的太阳能存储和实际有效的光催化剂。
