Preparation of N-doped and oxygen-deficient TiO2 microspheres via a novel electron beam-assisted method |
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| Institution: | 1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, PR China;2. Department of Chemistry, East China University of Science and Technology, Shanghai 200237, PR China;1. Department of Civil Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588, United States;2. Department of Civil and Architectural Engineering, University of Wyoming, Laramie, WY 82071, United States;3. Division of Water Environmental Engineering Research, National Institute of Environmental Research, Ministry of Environment, Incheon 22689, Republic of Korea;1. Chemistry Department, College of Science, King Saud University, P. O. Box 2455, Riyadh 11451, Saudi Arabia;2. Pharmaceutical Chemistry Department, College of Pharmacy, Prince Sattam Bin Abdulaziz University, P. O. Box 173, Alkharj 11942, Saudi Arabia;3. Chemistry Department, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P. O. Box 173, Alkharj 11942, Saudi Arabia;4. Polymer Department National Center for Radiation Research and Technology, Nasr city, Cairo, Egypt |
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| Abstract: | Nitrogen-doped and oxygen-deficient TiO2 microspheres (NT) with large specific surface were prepared by a solvothermal method and following with electron beam (EB) irradiation under various doses (140–500 kGy). XPS results show that under the EB irradiation, nitrogen ions have been doped into the TiO2 lattice successfully, as well as part of Ti4+ on the surface of the samples changed to Ti3+. Photocatalytic performance was tested by decomposing Rhodamine B in the aqueous phase under visible light irradiation. The prepared materials under the EB irradiation at dose of 140 kGy (NT-140) exhibit the best visible light photocatalytic activity. It is attributed to the large specific surface (138.4 m2/g) and a synergistic effect between substitutional nitrogen dopants and oxygen defects in NT-140. The results obtained may provide a new sight for the application of EB-assisted preparation of nanomaterials. |
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| Keywords: | Titanium dioxide Nitrogen-doped Oxygen-deficient Photocatalysis Electron beam irradiation |
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