Publication: Photoelectrochemical Properties Of Titanium Dioxide Nanostructures Grown By Hydrothermal Technique
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Date
2025-02
Authors
Feng, Taixiang
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Abstract
Photoelectrochemical (pec) water splitting is a highly promising technique to convert solar energy into chemical energy by storing energy in the form of chemical bonds of the reaction products (h2 and o2). Additionally, h2 fuel is of great interest to meet the requirement of increasing energy consumption. In this work, anatase non-stoichiometric tio2 nanostructures transformed from titanates were prepared by the alkaline hydrothermal technique at different treatment durations (4h- 24h) and temperatures (130°c-210°c). The morphologies of samples were characterized by field emission scanning electron microscopy (fesem) and demonstrated that the morphological change of tio2 from nanosheets to nanowires. Also, the o/ti atomic ratio extracted from the edx data indicates that all the samples have indirectly shown non-stoichiometric structures with the formula can be presented as tio2-x because of the oxygen deficiency. The phase of tio2 nanostructures is confirmed to be anatase by x-ray diffraction (xrd) patterns. The optical properties of samples were measured by uv–vis-nir measurement and suggested that long-time duration and high temperature of hydrothermal treatment both caused the increase in the diffuse reflection. With respect to the pec properties, a three-electrode reaction cell made of tio2 photoanode, platinum wire and ag/agcl reference electrode was used to evaluate the performance of samples.
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Titanium dioxide