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Nanoforest-like CdS/TiO2 heterostructure composites: Synthesis and photoelectrochemical application |
| Shi Su(苏适)1, Jinwen Ma(马晋文)2, Wanlong Zuo(左万龙)3, Jun Wang(汪俊)1, Li Liu(刘莉)1, Shuang Feng(冯爽)1, Tie Liu(刘铁)1, Wuyou Fu(付乌有)1, Haibin Yang(杨海滨)1 |
1 State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, China;
2 College of New Energy, Bohai University, Jinzhou 121013, China;
3 Anhui Provincial Key Laboratory of Optoelectric Materials Science and Technology, Anhui Normal University, Wuhu 241000, China |
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Abstract In this study, TiO2 nanoforest films consisting of nanotubes have been synthesized by a simple hydrothermal method and a subsequent sintering technique. The hydrothermal reaction time is important for the controlling of the nanotube diameter and the specific surface area of holistic TiO2 films. When the hydrothermal process reaction time is up to 8 hours, the diameter of the nanotube is about 10 nm, and the specific surface area of TiO2 nanoforest films reaches the maximum. CdS nanoparticles are synthesized on TiO2 nanoforest films by the successive ionic layer adsorption and reaction (SILAR) technique. The transmission electron microscope (TEM) and energy dispersive x-ray spectroscopy (EDX) mapping results verify that TiO2/CdS heterostructures are realized. A significant red-shift of the absorption edge from 380 nm to 540 nm can be observed after the pure TiO2 film is sensitized by CdS nanoparticles. Under irradiation of light, the current density of the optimal TiO2/CdS photoanode is 2.30 mA·cm-2 at 0 V relative to the saturated calomel electrode (SCE), which is 6 times stronger than that of the pure TiO2 photoanode. This study suggests that the TiO2 nanoforest consisting of interlinked pony-size nanotubes is a promising nanostructure for photoelectrochemical.
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Received: 22 March 2018
Revised: 22 May 2018
Accepted manuscript online:
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PACS:
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88.30.mj
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(Composite materials)
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88.40.ff
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(Performance testing)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51272086 and 11704004), the Technology Development Program of Jilin Province, China (Grant No. 20130206078GX), and the Natural Science Foundation of Anhui Province, China (Grant No. 1808085QA20). |
Corresponding Authors:
Haibin Yang
E-mail: yanghb@jlu.edu.cn
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Cite this article:
Shi Su(苏适), Jinwen Ma(马晋文), Wanlong Zuo(左万龙), Jun Wang(汪俊), Li Liu(刘莉), Shuang Feng(冯爽), Tie Liu(刘铁), Wuyou Fu(付乌有), Haibin Yang(杨海滨) Nanoforest-like CdS/TiO2 heterostructure composites: Synthesis and photoelectrochemical application 2018 Chin. Phys. B 27 088802
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