Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical
Photocatalytic degradation of an antibiotic by utilizing inexhaustible solar energy represents an ideal solution for tackling global environment issues. The target generation of active oxidative species is highly desirable for the photocatalytic pollutants degradation. Herein, aiming at the molecula...
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| Online Access: | https://www.mdpi.com/1996-1944/14/7/1598 |
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doaj-2548f8b90c7446218947451dd59796e62021-03-26T00:01:41ZengMDPI AGMaterials1996-19442021-03-01141598159810.3390/ma14071598Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate RadicalZhuquan Huang0Jiaqi Wang1Min-Quan Yang2Qingrong Qian3Xin-Ping Liu4Liren Xiao5Hun Xue6College of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaCollege of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaCollege of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaCollege of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaCollege of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaCollege of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaCollege of Environmental Science and Engineering, Fujian Normal University, Fuzhou 350007, ChinaPhotocatalytic degradation of an antibiotic by utilizing inexhaustible solar energy represents an ideal solution for tackling global environment issues. The target generation of active oxidative species is highly desirable for the photocatalytic pollutants degradation. Herein, aiming at the molecular structure of tetracycline hydrochloride (TC), we construct sunlight-activated high-efficient catalysts of TiO<sub>2</sub>-eggshell (TE). The composite ingeniously utilizes the photoactive function of TiO<sub>2</sub> and the composition of eggshell, which can produce oxidative ·CO<sub>3</sub><sup>−</sup> species that are especially active for the degradation of aromatic compounds containing phenol or aniline structures. Through the synergistic oxidation of the··CO<sub>3</sub><sup>−</sup> with the traditional holes (h<sup>+</sup>), superoxide radicals (·O<sup>2−</sup>) and hydroxyl radicals (·OH) involved in the photocatalytic process, the optimal TE photocatalyst degrades 92.0% TC in 30 min under solar light, which is higher than TiO<sub>2</sub> and eggshell. The photocatalytic degradation pathway of TC over TE has been proposed. The response surface methodology is processed by varying four independent parameters (TC concentration, pH, catalyst dosage and reaction time) on a Box–Behnken design (BBD) to optimize the experimental conditions. It is anticipated that the present work can facilitate the development of novel photocatalysts for selective oxidation based on ·CO<sub>3</sub><sup>−</sup>.https://www.mdpi.com/1996-1944/14/7/1598photocatalysisTiO<sub>2</sub>-eggshellcarbonate radicaltetracycline hydrochlorideselective oxidation |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Zhuquan Huang Jiaqi Wang Min-Quan Yang Qingrong Qian Xin-Ping Liu Liren Xiao Hun Xue |
| spellingShingle |
Zhuquan Huang Jiaqi Wang Min-Quan Yang Qingrong Qian Xin-Ping Liu Liren Xiao Hun Xue Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical Materials photocatalysis TiO<sub>2</sub>-eggshell carbonate radical tetracycline hydrochloride selective oxidation |
| author_facet |
Zhuquan Huang Jiaqi Wang Min-Quan Yang Qingrong Qian Xin-Ping Liu Liren Xiao Hun Xue |
| author_sort |
Zhuquan Huang |
| title |
Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical |
| title_short |
Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical |
| title_full |
Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical |
| title_fullStr |
Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical |
| title_full_unstemmed |
Construction of TiO<sub>2</sub>-Eggshell for Efficient Degradation of Tetracycline Hydrochloride: Sunlight Induced In-Situ Formation of Carbonate Radical |
| title_sort |
construction of tio<sub>2</sub>-eggshell for efficient degradation of tetracycline hydrochloride: sunlight induced in-situ formation of carbonate radical |
| publisher |
MDPI AG |
| series |
Materials |
| issn |
1996-1944 |
| publishDate |
2021-03-01 |
| description |
Photocatalytic degradation of an antibiotic by utilizing inexhaustible solar energy represents an ideal solution for tackling global environment issues. The target generation of active oxidative species is highly desirable for the photocatalytic pollutants degradation. Herein, aiming at the molecular structure of tetracycline hydrochloride (TC), we construct sunlight-activated high-efficient catalysts of TiO<sub>2</sub>-eggshell (TE). The composite ingeniously utilizes the photoactive function of TiO<sub>2</sub> and the composition of eggshell, which can produce oxidative ·CO<sub>3</sub><sup>−</sup> species that are especially active for the degradation of aromatic compounds containing phenol or aniline structures. Through the synergistic oxidation of the··CO<sub>3</sub><sup>−</sup> with the traditional holes (h<sup>+</sup>), superoxide radicals (·O<sup>2−</sup>) and hydroxyl radicals (·OH) involved in the photocatalytic process, the optimal TE photocatalyst degrades 92.0% TC in 30 min under solar light, which is higher than TiO<sub>2</sub> and eggshell. The photocatalytic degradation pathway of TC over TE has been proposed. The response surface methodology is processed by varying four independent parameters (TC concentration, pH, catalyst dosage and reaction time) on a Box–Behnken design (BBD) to optimize the experimental conditions. It is anticipated that the present work can facilitate the development of novel photocatalysts for selective oxidation based on ·CO<sub>3</sub><sup>−</sup>. |
| topic |
photocatalysis TiO<sub>2</sub>-eggshell carbonate radical tetracycline hydrochloride selective oxidation |
| url |
https://www.mdpi.com/1996-1944/14/7/1598 |
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