基于二维层状半导体材料的光电极特性及其研究进展

Characteristics of photoelectrode based on two-dimensional layered semiconductor materials and its research progress

自石墨烯被发现以来,具有带隙的二维层状半导体材料得到了广泛关注,它们可以覆盖太阳光谱中从红外到紫外的各个波段范围,为充分利用太阳能奠定了基础。光电极作为光电化学池的重要组成部分,能够直接将太阳能转化成化学能,可以实现光催化制氢,是目前光电研究的前沿方向。二维层状材料由于具有比表面积大、容易担载、缺陷的化学活性强等优点,成为目前光电极研究的首选材料,在高效利用太阳能方面具有潜在的应用价值。从光电极的基本光物理和光化学过程出发,文中介绍了基于二维材料光电极的制备、光电特性及其最新研究进展,并对其未来的发展趋势进行了思考和展望。

Since the discovery of graphene,two-dimensional layered semiconductor materials with the band-gaps have received wide attention,they can cover all bands of the solar spectrumfrom infrared to ultraviolet,affording the foundation for making full use of the solar energy.As an important part of the photoelectrochemical cell,the photoelectrode can directly convert solar energy into chemical energy and can realize photocatalytic hydrogen production,which is the frontier of the photoelectric research.Due to the advantages of large specific surface area,easy loading,and strong chemical activity of defects,two-dimensional layered materials become the most important materials for photoelectrodes,which have potential applications in efficient utilization of solar energy.Based on basic photophysical and photochemical processes of the photoelectrodes,the preparation,photoelectric characteristics,and the research progress of photoelectrodes based on two-dimensional material are introduced.The future development trend of photoelectrodes based on two-dimensional materials is considered and prospected.