Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties
The main purpose is to figure out the involved synergistic effects by combining sono-Fenton using in situ generated H<sub>2</sub>O<sub>2</sub> and the photocatalytic process of P25 under visible light (Vis/P25). Two emerging contaminants, dimethyl phthalate (DMP) and diethyl...
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MDPI AG
2020-11-01
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| author | Lanyue Qi Wenyuan Lu Gengxu Tian Yang Sun Jiangang Han Lijie Xu |
| author_facet | Lanyue Qi Wenyuan Lu Gengxu Tian Yang Sun Jiangang Han Lijie Xu |
| author_sort | Lanyue Qi |
| collection | DOAJ |
| description | The main purpose is to figure out the involved synergistic effects by combining sono-Fenton using in situ generated H<sub>2</sub>O<sub>2</sub> and the photocatalytic process of P25 under visible light (Vis/P25). Two emerging contaminants, dimethyl phthalate (DMP) and diethyl phthalate (DEP), with similar structure but different properties were selected to examine the influence of hydrophilic and hydrophobic properties of target pollutants. Results show that there is synergy between sono-Fenton and Vis/P25, and more significant synergy can be obtained with low dose of Fe<sup>3+</sup> or Fe<sup>2+</sup> (0.02 mM) and for more hydrophilic DMP. Based on systematic analysis, the primary mechanism of the synergy is found to be the fast regeneration of Fe<sup>2+</sup> by photo-electrons from P25 photocatalysis, which plays the dominant role when the Fe<sup>3+</sup>/Fe<sup>2+</sup> concentration is low (0.02 mM). However, at high Fe<sup>3+</sup>/Fe<sup>2+</sup> concentration (0.5 mM), the photoreduction of Fe(III) to Fe<sup>2+</sup> can play a key role with relatively low efficiency. By studying the degradation intermediates of both DMP and DEP, the degradation pathways can be determined as the hydroxylation of aromatic ring and the oxidation of the aliphatic chain. Better mineralization performance is achieved for DMP than that for DEP due to the enhanced utilization efficiency of H<sub>2</sub>O<sub>2</sub> by accelerating Fe<sup>2+</sup> regeneration. |
| first_indexed | 2024-03-10T14:57:55Z |
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| last_indexed | 2024-03-10T14:57:55Z |
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| spelling | doaj.art-77739934e59241e895996453eccd155c2023-11-20T20:23:52ZengMDPI AGCatalysts2073-43442020-11-011011129710.3390/catal10111297Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant PropertiesLanyue Qi0Wenyuan Lu1Gengxu Tian2Yang Sun3Jiangang Han4Lijie Xu5College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, ChinaCollege of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, ChinaCollege of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, ChinaCollege of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, ChinaCollege of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, ChinaCollege of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, Jiangsu, ChinaThe main purpose is to figure out the involved synergistic effects by combining sono-Fenton using in situ generated H<sub>2</sub>O<sub>2</sub> and the photocatalytic process of P25 under visible light (Vis/P25). Two emerging contaminants, dimethyl phthalate (DMP) and diethyl phthalate (DEP), with similar structure but different properties were selected to examine the influence of hydrophilic and hydrophobic properties of target pollutants. Results show that there is synergy between sono-Fenton and Vis/P25, and more significant synergy can be obtained with low dose of Fe<sup>3+</sup> or Fe<sup>2+</sup> (0.02 mM) and for more hydrophilic DMP. Based on systematic analysis, the primary mechanism of the synergy is found to be the fast regeneration of Fe<sup>2+</sup> by photo-electrons from P25 photocatalysis, which plays the dominant role when the Fe<sup>3+</sup>/Fe<sup>2+</sup> concentration is low (0.02 mM). However, at high Fe<sup>3+</sup>/Fe<sup>2+</sup> concentration (0.5 mM), the photoreduction of Fe(III) to Fe<sup>2+</sup> can play a key role with relatively low efficiency. By studying the degradation intermediates of both DMP and DEP, the degradation pathways can be determined as the hydroxylation of aromatic ring and the oxidation of the aliphatic chain. Better mineralization performance is achieved for DMP than that for DEP due to the enhanced utilization efficiency of H<sub>2</sub>O<sub>2</sub> by accelerating Fe<sup>2+</sup> regeneration.https://www.mdpi.com/2073-4344/10/11/1297sono-FentonphotocatalysisTiO<sub>2</sub>P25ultrasoundvisible light |
| spellingShingle | Lanyue Qi Wenyuan Lu Gengxu Tian Yang Sun Jiangang Han Lijie Xu Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties Catalysts sono-Fenton photocatalysis TiO<sub>2</sub> P25 ultrasound visible light |
| title | Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties |
| title_full | Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties |
| title_fullStr | Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties |
| title_full_unstemmed | Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties |
| title_short | Enhancement of Sono-Fenton by P25-Mediated Visible Light Photocatalysis: Analysis of Synergistic Effect and Influence of Emerging Contaminant Properties |
| title_sort | enhancement of sono fenton by p25 mediated visible light photocatalysis analysis of synergistic effect and influence of emerging contaminant properties |
| topic | sono-Fenton photocatalysis TiO<sub>2</sub> P25 ultrasound visible light |
| url | https://www.mdpi.com/2073-4344/10/11/1297 |
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