WO_(3)水合物在光催化领域的应用与研究进展

Application and research progress of WO_(3)hydrate in the field of photocatalysis

三氧化钨(WO_(3))作为一种过渡金属氧化物半导体材料,具有良好的可见光响应能力,是理想的光催化材料之一.然而,其光生电荷分离效率低的弊端始终阻碍其发展.相比于WO_(3),其水合形式(WO_(3)·nH_(2)O)由于具有更高的电荷转移分离效率而备受研究者的青睐.本文针对近年来WO_(3)·nH_(2)O材料在光催化领域的应用与研究进展进行了系统的归纳整理.首先介绍了WO_(3)·nH_(2)O光催化剂的晶体结构,接着从晶体结构、电子转移分离以及能带结构的角度分析了结晶水对WO_(3)的影响,并重点阐述了WO_(3)·nH_(2)O和WO_(3)·nH_(2)O基改性光催化剂的制备方法.最后总结了WO_(3)·nH_(2)O及其所构建的复合材料在水分解析氢、CO_(2)还原和降解染料类污染物三个方面的应用,并对发展前景做出了展望.本工作旨在为推动WO_(3)·nH_(2)O光催化体系发展提供有益参考.

Photocatalysis,recognized as an eco-friendly and efficient energy conversion and utilization technology,has garnered widespread attention owing to its potential to address environmental and energy-related challenges.Its capacity to harness sunlight as an energy source makes it particularly promising.Photocatalytic materials are central to the advancement of photocatalytic technology,and the emergence of new visible-light-responsive photocatalysts represents a noteworthy trend in this field.WO_(3)is a semiconductor material composed of transition-metal oxides.It exhibits excellent responsiveness to visible light and is considered to be an ideal photocatalytic material.However,the persistent issue of low photogenerated charge separation efficiency has hindered their development.In contrast to pure WO_(3),its hydrated form,WO_(3)·nH_(2)O,has garnered considerable interest from researchers because of its enhanced charge transfer and separation efficiency.This study comprehensively reviews recent applications and research progress in photocatalysis using WO_(3)·nH_(2)O.This study introduces the crystal structure of WO_(3)·nH_(2)O photocatalysts and analyzes the impact of crystal water on WO_(3).This analysis covered the crystal structure,charge transfer,separation,and band structure.The study then extensively discusses the preparation methods for WO_(3)·nH_(2)O and modified photocatalysis based on WO_(3)·nH_(2)O,with particular emphasis on elucidating these methods.Finally,this study summarizes the diverse applications of WO_(3)·nH_(2)O and its composite materials in water desorption for hydrogen production,CO_(2)reduction,and dye pollutant degradation.In addition,it delves into the prospects for future development of these materials.The overarching goal of this study was to serve as a valuable reference for advancing WO_(3)·nH_(2)O photocatalytic systems.