N-Cdots-decorated TiO2(B)/anatase microspheres with high photocatalytic performance in visible light |
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| Affiliation: | 1. School of Material Science and Engineering, University of Jinan, Jinan, 250022, China;2. Fuels and Energy Technology Institute, Department of Chemical Engineering, Curtin University, Perth, WA6845, Australia;1. National Center of Excellence in Physical Chemistry, University of Peshawar, Peshawar, KPK, 25120, Pakistan;2. Department of Chemistry, COMSATS University, Abbottabad Campus, Abbottabad, KPK, 22060, Pakistan;3. Institute of Chemistry, University of Peshawar, Peshawar, KPK, Pakistan;4. Department of Chemistry, Korea Advanced Institute of Sciences and Technology (KAIST), Daejeon, 34141, Republic of Korea;1. Nanocarbon Laboratory, Dipartimento di Scienze Matematiche, Fisiche e Informatiche, Università degli Studi di Parma, Parco Area delle Scienze, 7/a, 43124 Parma, Italy;2. Institut Laue-Langevin, 71 Avenue des Martyrs, CS 20156, 38042 Grenoble Cedex 9, France;3. Elettra - Sincrotrone Trieste S.C.p.A., Strada Statale 14 - Km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy;1. Institute of Basic Biological Problems, Russian Academy of Sciences, Pushchino, Moscow Region, Russia, 142290;2. Department of Biology, Faculty of Science, Tokyo University of Science, Kagurazaka 1-3, Shinjuku-Ku, Tokyo, 162-8601, Japan;3. Timiryazev K.A. Institute of Plant Physiology, Russian Academy of Sciences, 35 Botanicheskaya St., Moscow, 127276, Russia;4. Department of Biochemistry, University of Otago, Dunedin, 9054, New Zealand;5. Department of Plant Biology, Department of Biochemistry, Center of Biophysics & Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA;1. Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China;2. School of Sciences, Hubei University of Automotive Technology, Shiyan 442002, China;3. State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China |
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| Abstract: | Nitrogen-doped carbon dots (N-Cdots) with enhanced absorption in visible light region were combined with TiO2(B)/anatase (TiO2(A + B)) microspheres consist of nanosheets via a one-step synthesis. The successful connection of N-Cdots and TiO2 substrate was confirmed by the appearance of new Ti–O–C bond. The degradation rate of Rhodamine B (RhB) for N-Cdots@TiO2(B)/anatase was improved to seven times higher than that of initial TiO2(B) microspheres under full spectrum illumination. N-Cdots@TiO2(B)/anatase photocatalyst also exhibited high photocatalytic ability under visible light irradiation. The possible mechanism was proposed in two irradiation conditions. N-Cdots act as a semiconductor to generate electrons and holes. The electrons were transferred to the conduction band of TiO2(B) and anatase, which improved the visible light utilization efficiency. Meanwhile, the heterophase structure of TiO2(A + B) substrate restrained the recombination of electron-hole pairs. It is the synergistic effect of heterophase and N-Cdots that enhanced the photocatalytic performance. |
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| Keywords: | Carbon dots Photocatalysis Phase heterostructures Composites |
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