一种用于高效光电化学水氧化的具有长波长可见光吸收能力的 SbS/TiO 光阳极的简易制备方法。
A Simple Fabrication of SbS/TiO Photo-Anode with Long Wavelength Visible Light Absorption for Efficient Photoelectrochemical Water Oxidation.
作者信息
Han Fei, Ma Sai, Li Dong, Alam Md Mofasserul, Yang Zeheng
机构信息
School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China.
School of Material Science and Engineering, North Minzu University, Yinchuan 750021, China.
出版信息
Nanomaterials (Basel). 2022 Oct 1;12(19):3444. doi: 10.3390/nano12193444.
An SbS-sensitized TiO (SbS/TiO) photo-anode (PA) exhibiting a high photo-electrochemical (PEC) performance in water oxidation has been successfully prepared by a simple chemical bath deposition (CBD) technique. Herein, the Raman spectra and XPS spectrum of SbS/TiO confirmed the formation of SbS on the TiO coatings. The SbS/TiO photo-anode significantly shifted the absorption edge from 395 nm (3.10 eV) to 650 nm (1.90 eV). Furthermore, the SbS/TiO photo-anode generated a photo-anodic current under visible light irradiation below 650 nm due to the photo-electrochemical action compared with the TiO photo-anode at 390 nm. The incident photon-to-current conversion efficiency (IPCE = 7.7%) at 400 nm and -0.3 V vs. Ag/AgCl was 37 times higher than that (0.21%) of the TiO photo-anodes due to the low recombination rate and acceleration of the carriers of SbS/TiO. Moreover, the photo-anodic current and photostability of the SbS/TiO photo-anodes improved via adding the Co ions to the electrolyte solution during photo-electrocatalysis.
通过简单的化学浴沉积（CBD）技术成功制备了一种在水氧化中表现出高光电化学（PEC）性能的硫化锑敏化二氧化钛（SbS/TiO）光阳极（PA）。在此，SbS/TiO的拉曼光谱和XPS光谱证实了在TiO涂层上形成了SbS。SbS/TiO光阳极将吸收边缘从395 nm（3.10 eV）显著移动到650 nm（1.90 eV）。此外，与390 nm处的TiO光阳极相比，由于光电化学作用，SbS/TiO光阳极在650 nm以下的可见光照射下产生了光阳极电流。由于SbS/TiO的载流子复合率低且加速，在400 nm和相对于Ag/AgCl为-0.3 V时，入射光子到电流转换效率（IPCE = 7.7%）比TiO光阳极的（0.21%）高37倍。此外，在光电催化过程中通过向电解液中添加Co离子，SbS/TiO光阳极的光阳极电流和光稳定性得到了改善。
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