Effect of Crystallization Methods on the Surface Electronic Structure and Photoelectrochemical Properties of TiO2 Nanotube Arrays

Fang Gong Cai; Feng Yang; Yong Zhao

doi:10.4028/www.scientific.net/AMR.616-618.1906

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 616-618Effect of Crystallization Methods on the Surface...

Effect of Crystallization Methods on the Surface Electronic Structure and Photoelectrochemical Properties of TiO₂ Nanotube Arrays

Abstract:

The crystallization of anatase from amorphous TiO₂ nanotube arrays (TNTs) has been carried out by annealing in air and hydrothermal treatment in water. The morphology and crystalline phase of obtained TNTs membranes were detailedly characterized by field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The surface electronic structure and photoelectrochemical properties (PEC) of TNTs obtained by different crystallization methods were investigated. The results show that the TNTs electrode crystallized by hydrothermal treatment method demonstrate a broader surface photovoltage response range and higher photoelectrochemical properties than that of TNTs electrode directly annealed in air due to effective Ti³⁺ sites.