Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub>
Titanium oxide (TiO<sub>2</sub>) is a potential photocatalyst for removing toxic NO<sub>x</sub> from the atmosphere. Its practical application is, however, significantly limited by its low absorption into visible light and a high degree of charge recombination. The overall ph...
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2021-01-01
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| author | Tamal Tahsin Khan Gazi A. K. M. Rafiqul Bari Hui-Ju Kang Tae-Gyu Lee Jae-Woo Park Hyun Jin Hwang Sayed Mukit Hossain Jong Seok Mun Norihiro Suzuki Akira Fujishima Jong-Ho Kim Ho Kyong Shon Young-Si Jun |
| author_facet | Tamal Tahsin Khan Gazi A. K. M. Rafiqul Bari Hui-Ju Kang Tae-Gyu Lee Jae-Woo Park Hyun Jin Hwang Sayed Mukit Hossain Jong Seok Mun Norihiro Suzuki Akira Fujishima Jong-Ho Kim Ho Kyong Shon Young-Si Jun |
| author_sort | Tamal Tahsin Khan |
| collection | DOAJ |
| description | Titanium oxide (TiO<sub>2</sub>) is a potential photocatalyst for removing toxic NO<sub>x</sub> from the atmosphere. Its practical application is, however, significantly limited by its low absorption into visible light and a high degree of charge recombination. The overall photocatalytic activity of TiO<sub>2</sub> remains too low since it can utilize only about 4–5% of solar energy. Nitrogen doping into the TiO<sub>2</sub> lattice takes advantage of utilizing a wide range of solar radiation by increasing the absorption capability towards the visible light region. In this work, N-doped TiO<sub>2</sub>, referred to as TC, was synthesized by a simple co-precipitation of tri-thiocyanuric acid (TCA) with P25 followed by heat treatment at 550 degrees C. The resulting nitrogen doping increased the visible-light absorption and enhanced the separation/transfer of photo-excited charge carriers by capturing holes by reduced titanium ions. As a result, TC samples exhibited excellent photocatalytic activities of 59% and 51% in NO oxidation under UV and visible light irradiation, in which the optimum mass ratio of TCA to P25 was found to be 10. |
| first_indexed | 2024-03-09T04:49:41Z |
| format | Article |
| id | doaj.art-41f34574818a4fa6b069f38e0327b21e |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T04:49:41Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-41f34574818a4fa6b069f38e0327b21e2023-12-03T13:11:49ZengMDPI AGCatalysts2073-43442021-01-0111110910.3390/catal11010109Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub>Tamal Tahsin Khan0Gazi A. K. M. Rafiqul Bari1Hui-Ju Kang2Tae-Gyu Lee3Jae-Woo Park4Hyun Jin Hwang5Sayed Mukit Hossain6Jong Seok Mun7Norihiro Suzuki8Akira Fujishima9Jong-Ho Kim10Ho Kyong Shon11Young-Si Jun12Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaDepartment of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaDepartment of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaDepartment of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaDepartment of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaSchool of Chemical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaFaculty of Engineering and IT, University of Technology, Sydney, P.O. Box 123, Broadway, NSW 2007, AustraliaDepartment of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaPhotocatalysis International Research Center (PIRC), Research Institute for Science and Technology (RIST), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, JapanPhotocatalysis International Research Center (PIRC), Research Institute for Science and Technology (RIST), Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, JapanSchool of Chemical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaFaculty of Engineering and IT, University of Technology, Sydney, P.O. Box 123, Broadway, NSW 2007, AustraliaDepartment of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, KoreaTitanium oxide (TiO<sub>2</sub>) is a potential photocatalyst for removing toxic NO<sub>x</sub> from the atmosphere. Its practical application is, however, significantly limited by its low absorption into visible light and a high degree of charge recombination. The overall photocatalytic activity of TiO<sub>2</sub> remains too low since it can utilize only about 4–5% of solar energy. Nitrogen doping into the TiO<sub>2</sub> lattice takes advantage of utilizing a wide range of solar radiation by increasing the absorption capability towards the visible light region. In this work, N-doped TiO<sub>2</sub>, referred to as TC, was synthesized by a simple co-precipitation of tri-thiocyanuric acid (TCA) with P25 followed by heat treatment at 550 degrees C. The resulting nitrogen doping increased the visible-light absorption and enhanced the separation/transfer of photo-excited charge carriers by capturing holes by reduced titanium ions. As a result, TC samples exhibited excellent photocatalytic activities of 59% and 51% in NO oxidation under UV and visible light irradiation, in which the optimum mass ratio of TCA to P25 was found to be 10.https://www.mdpi.com/2073-4344/11/1/109N-doped TiO<sub>2</sub>precipitationNO<sub>x</sub> removal |
| spellingShingle | Tamal Tahsin Khan Gazi A. K. M. Rafiqul Bari Hui-Ju Kang Tae-Gyu Lee Jae-Woo Park Hyun Jin Hwang Sayed Mukit Hossain Jong Seok Mun Norihiro Suzuki Akira Fujishima Jong-Ho Kim Ho Kyong Shon Young-Si Jun Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub> Catalysts N-doped TiO<sub>2</sub> precipitation NO<sub>x</sub> removal |
| title | Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub> |
| title_full | Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub> |
| title_fullStr | Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub> |
| title_full_unstemmed | Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub> |
| title_short | Synthesis of N-Doped TiO<sub>2</sub> for Efficient Photocatalytic Degradation of Atmospheric NO<sub>x</sub> |
| title_sort | synthesis of n doped tio sub 2 sub for efficient photocatalytic degradation of atmospheric no sub x sub |
| topic | N-doped TiO<sub>2</sub> precipitation NO<sub>x</sub> removal |
| url | https://www.mdpi.com/2073-4344/11/1/109 |
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