Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process
A novel one-step preparation of sonochemical method was applied to synthesize Co/Zn co-doped TiO<sub>2</sub> nanoparticles using a sonicator of 750 W, 20 kHz for 30 min at room temperature. The formation of the anatase TiO<sub>2</sub> phase for all as-prepared samples was obs...
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MDPI AG
2021-10-01
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| author | Wanichaya Mekprasart Sorapong Pavasupree C. K. Jayasankar Balaji Rao Ravuri Chakkaphan Wattanawikkam Wisanu Pecharapa |
| author_facet | Wanichaya Mekprasart Sorapong Pavasupree C. K. Jayasankar Balaji Rao Ravuri Chakkaphan Wattanawikkam Wisanu Pecharapa |
| author_sort | Wanichaya Mekprasart |
| collection | DOAJ |
| description | A novel one-step preparation of sonochemical method was applied to synthesize Co/Zn co-doped TiO<sub>2</sub> nanoparticles using a sonicator of 750 W, 20 kHz for 30 min at room temperature. The formation of the anatase TiO<sub>2</sub> phase for all as-prepared samples was observed from XRD results with a crystalline size in nanoscale. The use of ultrasound allowed for the successful doping of both Co and Zn into the TiO<sub>2</sub> lattice, which was confirmed by Synchrotron light including X-ray near edge structure (XANES) and Extended X-ray absorption fine structure (EXAFS) spectroscopy. Ti K-edge, Co K-edge, and Zn K-edge XANES spectra exhibited the dominating +4, +2, and +2 valence state of Ti, Co, and Zn in as-prepared samples, respectively. A detailed XANES and EXAFS data analysis give strong evidence that the Co/Zn dopants partially replace the Ti atom of the TiO<sub>2</sub> host. The Co/Zn co-doping extends the light absorption of the host to the visible region and restricts the e<sup>+</sup>/h<sup>+</sup> recombination. The photocatalytic activity of samples was tested for degradation of Rhodamine B dye solution under visible light irradiation. The as-synthesized of the co-doped catalyst was presented as highly efficient, with 2.5 and 5 times dye degradation compared with single-doped and bare TiO<sub>2</sub>. |
| first_indexed | 2024-03-10T06:38:39Z |
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| id | doaj.art-7ba128ed85c5418e8545d690e47ae607 |
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| language | English |
| last_indexed | 2024-03-10T06:38:39Z |
| publishDate | 2021-10-01 |
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| series | Crystals |
| spelling | doaj.art-7ba128ed85c5418e8545d690e47ae6072023-11-22T17:54:02ZengMDPI AGCrystals2073-43522021-10-011110125410.3390/cryst11101254Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical ProcessWanichaya Mekprasart0Sorapong Pavasupree1C. K. Jayasankar2Balaji Rao Ravuri3Chakkaphan Wattanawikkam4Wisanu Pecharapa5College of Materials Innovation and Technology, King Mongkut’s Institute of Technology, Ladkrabang, Bangkok 10520, ThailandDepartment of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology, Thanyaburi, Pathum Thani 12110, ThailandDepartment of Physics, Sri Venkateswara University, Tirupati 517502, IndiaDepartment of Physics, School of Science, GITAM Deemed to Be University, Hyderabad 502329, IndiaDivision of Physics, Faculty of Science and Technology, Rajamangala University of Technology, Thanyaburi, Pathum Thani 12110, ThailandCollege of Materials Innovation and Technology, King Mongkut’s Institute of Technology, Ladkrabang, Bangkok 10520, ThailandA novel one-step preparation of sonochemical method was applied to synthesize Co/Zn co-doped TiO<sub>2</sub> nanoparticles using a sonicator of 750 W, 20 kHz for 30 min at room temperature. The formation of the anatase TiO<sub>2</sub> phase for all as-prepared samples was observed from XRD results with a crystalline size in nanoscale. The use of ultrasound allowed for the successful doping of both Co and Zn into the TiO<sub>2</sub> lattice, which was confirmed by Synchrotron light including X-ray near edge structure (XANES) and Extended X-ray absorption fine structure (EXAFS) spectroscopy. Ti K-edge, Co K-edge, and Zn K-edge XANES spectra exhibited the dominating +4, +2, and +2 valence state of Ti, Co, and Zn in as-prepared samples, respectively. A detailed XANES and EXAFS data analysis give strong evidence that the Co/Zn dopants partially replace the Ti atom of the TiO<sub>2</sub> host. The Co/Zn co-doping extends the light absorption of the host to the visible region and restricts the e<sup>+</sup>/h<sup>+</sup> recombination. The photocatalytic activity of samples was tested for degradation of Rhodamine B dye solution under visible light irradiation. The as-synthesized of the co-doped catalyst was presented as highly efficient, with 2.5 and 5 times dye degradation compared with single-doped and bare TiO<sub>2</sub>.https://www.mdpi.com/2073-4352/11/10/1254Co/Zn co-doped TiO<sub>2</sub>XANESEXAFSphotocatalystsonochemical method |
| spellingShingle | Wanichaya Mekprasart Sorapong Pavasupree C. K. Jayasankar Balaji Rao Ravuri Chakkaphan Wattanawikkam Wisanu Pecharapa Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process Crystals Co/Zn co-doped TiO<sub>2</sub> XANES EXAFS photocatalyst sonochemical method |
| title | Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process |
| title_full | Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process |
| title_fullStr | Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process |
| title_full_unstemmed | Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process |
| title_short | Characterization, X-ray Absorption Spectroscopic Analysis and Photocatalytic Activity of Co/Zn Co-Doped TiO<sub>2</sub> Nanoparticles Synthesized by One-Step Sonochemical Process |
| title_sort | characterization x ray absorption spectroscopic analysis and photocatalytic activity of co zn co doped tio sub 2 sub nanoparticles synthesized by one step sonochemical process |
| topic | Co/Zn co-doped TiO<sub>2</sub> XANES EXAFS photocatalyst sonochemical method |
| url | https://www.mdpi.com/2073-4352/11/10/1254 |
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