Enhanced visible-light photoelectrochemical performance via chemical vapor deposition of Fe2O3 on a WO3 film to form a heterojunction
来源期刊：Rare Metals2020年第7期
论文作者：Yi-Fei Zhang Yu-Kun Zhu Chun-Xiao Lv Shou-Juan Lai Wen-Jia Xu Jin Sun Yuan-Yuan Sun Dong-Jiang Yang
文章页码：841 - 849
摘 要：A heterojunction photoanode of Fe2O3 loaded on a WO3 film on a fluorine-doped tin oxide substrate（FTO-WO3/Fe2O3）was prepared via a simple hydrothermal and chemical vapor deposition（CVD）growth method.The photoanode showed higher photoelectrochemical（PEC）water-splitting activity than that of the pristine FTO-WO3 under simulated sunlight because of the synergistic effect of Fe2O3 and WO3.The as-synthesized material was characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,and X-ray photoelectron spectroscopy（XPS）.The photocurrent density was estimated by linear sweep voltammetry and further confirmed using intensity-modulated photocurrent spectra.Experiments demonstrated that the coated Fe2O3 enhanced the separation and migration efficiencies of the photoinduced electrons and holes,improving the PEC water-splitting properties.The FTO-WO3/Fe2O3 photoanode showed a 1.25 times enhancement in photocurrent density compared with FTO-WO3.This result suggests that facile chemical vapor deposition growth is an effective way to fabricate heterojunctions and improve the properties of WO3 photoanodes for PEC water-splitting applications.
Yi-Fei Zhang，Yu-Kun Zhu，Chun-Xiao Lv，Shou-Juan Lai，Wen-Jia Xu，Jin Sun，Yuan-Yuan Sun，Dong-Jiang Yang
School of Environmental Science and Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials,Qingdao University
摘 要：A heterojunction photoanode of Fe2O3 loaded on a WO3 film on a fluorine-doped tin oxide substrate（FTO-WO3/Fe2O3）was prepared via a simple hydrothermal and chemical vapor deposition（CVD）growth method.The photoanode showed higher photoelectrochemical（PEC）water-splitting activity than that of the pristine FTO-WO3 under simulated sunlight because of the synergistic effect of Fe2O3 and WO3.The as-synthesized material was characterized by X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,and X-ray photoelectron spectroscopy（XPS）.The photocurrent density was estimated by linear sweep voltammetry and further confirmed using intensity-modulated photocurrent spectra.Experiments demonstrated that the coated Fe2O3 enhanced the separation and migration efficiencies of the photoinduced electrons and holes,improving the PEC water-splitting properties.The FTO-WO3/Fe2O3 photoanode showed a 1.25 times enhancement in photocurrent density compared with FTO-WO3.This result suggests that facile chemical vapor deposition growth is an effective way to fabricate heterojunctions and improve the properties of WO3 photoanodes for PEC water-splitting applications.
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