期刊
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
卷 32, 期 16, 页码 21511-21524出版社
SPRINGER
DOI: 10.1007/s10854-021-06660-5
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资金
- Applied Basic Research Programs of Sichuan Province [2019YJ0664, 2018JY0062]
- Chengdu Technology Innovation Research and Development Project of Chengdu City [2019-YFYF-00013-SN]
- Training Program for Innovation of Sichuan Province [CDU-CX-2021527, S202011079053]
Pure TiO2 and Cu-doped TiO2 with different amounts of copper ions were synthesized via a hydrothermal method, showing high photocatalytic activity. The coexistence of three phases and the conversion between Cu2+ and Cu+ ions contribute to the separation of photogenerated electrons and holes, improving the photocatalytic performance.
Pure TiO2 and Cu-doped TiO2 containing different amounts of copper ions with anatase/rutile/brookite triphasic structure were successfully synthesized through a simple hydrothermal method. The obtained samples were characterized by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-DRS), photoluminescence spectroscopy (PL) and Brunauer-Emmett-Teller surface area analyze (BET). Both pure and Cu-doped TiO2 show relatively high photocatalytic activity owing to their considerable surface areas. Moreover, the three-phase coexisting structure and the conversion between Cu2+ and Cu+ ions facilitate the separation of photogenerated electrons and holes, which is favorable for photocatalytic performance. 1%Cu-TiO2 exhibits the highest photocatalytic activity and the degradation degree of rhodamine B (RhB) reaches 93.5% after 30 min, which is higher than that of monophasic/biphasic 1%Cu-TiO2. center dot O-2(-) radical is the main active species, and h(+) and center dot OH species are subsidiary in the degradation process.
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