| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Photoelectrochemical Properties of Hydrogen Reduced TiO2 Film by HF Corrosion |
| YU Lianqing1, YANG Qianlong1, ZHU Haifeng2, DUAN Lijie1, ZHAO Xingyu1, WANG Yankun1
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1 College of Material Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China
2 College of Science,China University of Petroleum (East China), Qingdao 266580, China |
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Abstract TiO2 is a low cost and stable semiconductor. It is widely studied in photocatalytic water splitting, waste-water treatment and so on. However, it can only absorb ultraviolet light limiting its practical application. HF solution was used to etch titanium sheet. Afterwards, TiO2 nano-film were reduced in H2 atmosphere under high temperature. The TiO2 nano-film were tested by XRD, SEM and electrochemical workstation to obtain phase composition, microstructures and photo-response current, linear sweep voltammetry curve, electrochemical impedance spectra, respectively. The results show that TiO2 nano-film exposes more rutile (101) facet through HF treatment. And the photoelectrochemical properties apparently promote after H2 treatment, the photocurrent density is up to 1.04 mA/cm2. It is 11.5 times higher than that of pure nano-film, and 2.97 times higher than that of without H2 reduction. Meanwhile, the maximum photoconversion efficiency reached 70% improvement.
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Published: 12 November 2021
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| Fund:Natural Science Foundation of Shandong Province (ZR2020ME010). |
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Corresponding Authors:
iyy2000@163.com
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| About author:: Lianqing Yu received his doctor’s degree in 2007 from Zhejiang University. He is a professor of China University of Petroleum (East China). His focus is on the research of permanent magnets, and photo(electro) cata-lysis hydrogen production. |
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2021, Vol. 35 
