关键字：Titanium compounds;Carrier concentration - Electrochemistry - Electromagnetic wave absorption - Heterojunctions - Hydrogen - Light absorption - Nanotubes - Strontium titanates - Synthesis (chemical) - Titanium dioxide - Yarn;Heterogeneous structures - Hydrogen treatments - Photoelectrochemical performance - Photoelectrochemical properties - Photoelectrochemicals - Photogenerated carriers - SrTiO3/TiO2 - Synergistic mechanism

摘要：The synergistic mechanism of hydrogen treatment technology and heterogeneous structure was firstly reported to enhance the photoelectrochemical properties of SrTiO<inf>3</inf>/TiO<inf>2</inf>composite. The SrTiO<inf>3</inf>nanoparticles were successfully synthesized on the surface of TiO<inf>2</inf>nanotube arrays to form SrTiO<inf>3</inf>/TiO<inf>2</inf>heterostructure by a hydrothermal method. The heterogeneous structure was further optimized by hydrogen treatment under calcinations to prepare the hydrogen-treated SrTiO<inf>3</inf>/TiO<inf>2</inf>nanotube arrays heterojunction composite (H-SrTiO<inf>3</inf>/TiO<inf>2</inf>). The photoelectrochemical performance of H-SrTiO<inf>3</inf>/TiO<inf>2</inf>was significantly enhanced, whose photocurrent density was 3 times of that of hydrogen treated TiO<inf>2</inf>(H-TiO<inf>2</inf>) and 1.5 times of that of SrTiO<inf>3</inf>/TiO<inf>2</inf>heterostructures. The improved photoelectrochemical performance of H-SrTiO<inf>3</inf>/TiO<inf>2</inf>can be attributed to the synergistic effect of hydrogen treatment and heterojunction, which results in the enhancement of light absorption and the increase of photogenerated carrier concentration.<br/> &copy; 2017 Elsevier B.V.

卷号：807

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