材料科学
海水
制氢
电荷(物理)
氢
化学工程
纳米技术
海洋学
有机化学
化学
物理
量子力学
工程类
地质学
作者
Yixuan Liu,Yi Lü,He Li,Ge Tian,Liying Wang,Fu‐Fei Pu,Ze-En Zhou,Si‐Ming Wu,Jie Ying,Wei Geng,Christoph Janiak,Xiaoyu Yang
标识
DOI:10.1021/acsami.4c10346
摘要
The directed electron transport channel design in semiconductors, which could promote charge utilization, is attractive but rarely reported. Hierarchical branched titanium dioxide (HB-TiO2), possessing a charge cascade transfer channel, was constructed by assembling titanium-defected TiO2 nanobranches on oxygen-defected TiO2 nanobelts. The interfacial Ti/O vacancies have been detected by X-ray photoelectron and electron paramagnetic resonance spectroscopies, and the vacancies act as the "bridge" of photogenerated carrier transport. This structure maintained high photoactivity in H2 production in different mass fractions of NaCl solutions. The photocurrent density of the HB-TiO2 photoanode in natural seawater is 3.9, 2.1, and 2.6 times that of oxygen-defected TiO2 nanobelts, titanium-defected TiO2 nanobranches, and their mixture, respectively. Besides, the charge transport mechanism from the inner lattice to the TiO2 surface is proposed.
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