Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism
Aimed at current difficulties in the treatment of trace antibiotics in water, an adsorption-catalytic oxidation system was established by combining persulfate and graphene, which have the dual functions of adsorption and catalysis, for simultaneous enrichment and degradation of trace antibiotics in...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ac7284 |
| _version_ | 1797746330620133376 |
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| author | Nan Wu Xuemin Zhang Xue Zhang Kai Yang Yanjuan Li |
| author_facet | Nan Wu Xuemin Zhang Xue Zhang Kai Yang Yanjuan Li |
| author_sort | Nan Wu |
| collection | DOAJ |
| description | Aimed at current difficulties in the treatment of trace antibiotics in water, an adsorption-catalytic oxidation system was established by combining persulfate and graphene, which have the dual functions of adsorption and catalysis, for simultaneous enrichment and degradation of trace antibiotics in water. The experimental results showed that over 90% sulfamethoxazole could be degraded by the proposed system. The activation energy of the proposed system was 7.9 kJ mol ^−1 , which was significantly lower than those of typical Co catalysts and some carbon-based catalysts. Synergistic effect analysis revealed that catalytic oxidation was the key degradation kinetic of the proposed system, while adsorption showed a significant enhancement effect. Specifically, a compound with large adsorption capacity tended to be degraded preferably and rapidly. Characterization results indicated that N atoms were doped into the graphene framework, resulting in significant impacts on the activation process of potassium bisulfate by activating the sp ^2 C system. Quenching and free radical trapping experiments revealed that degradation catalyzed by the proposed system was a non-free radical oxidation reaction dominated by singlet oxygen. In summary, the proposed design was rational, N-rGO surface provided good adsorption and catalysis sites, the synergistic effect of adsorption and catalytic oxidation led to rapid and effective enrichment and in situ degradation of trace antibiotics in water. |
| first_indexed | 2024-03-12T15:35:18Z |
| format | Article |
| id | doaj.art-581cbd58d5db49e7baf234f4f78d625a |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:35:18Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-581cbd58d5db49e7baf234f4f78d625a2023-08-09T16:13:51ZengIOP PublishingMaterials Research Express2053-15912022-01-019606560110.1088/2053-1591/ac7284Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanismNan Wu0https://orcid.org/0000-0001-9544-7638Xuemin Zhang1Xue Zhang2Kai Yang3Yanjuan Li4Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University , Lanzhou 730070, People’s Republic of China; School of Environment and Municipal Engineering, Lanzhou Jiaotong University , Lanzhou 730070, People’s Republic of ChinaKey Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University , Lanzhou 730070, People’s Republic of China; School of Environment and Municipal Engineering, Lanzhou Jiaotong University , Lanzhou 730070, People’s Republic of China; Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Min-istry of Education, Lanzhou 730070, People’s Republic of ChinaSchool of Petrochemical Engineering, Lanzhou Petrochemical University of Vocational Technology , Lanzhou 730060, People’s Republic of ChinaKey Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University , Lanzhou 730070, People’s Republic of China; School of Environment and Municipal Engineering, Lanzhou Jiaotong University , Lanzhou 730070, People’s Republic of ChinaSchool of Civil Engineering, Lanzhou University of Technology , Lanzhou 730000, People’s Republic of ChinaAimed at current difficulties in the treatment of trace antibiotics in water, an adsorption-catalytic oxidation system was established by combining persulfate and graphene, which have the dual functions of adsorption and catalysis, for simultaneous enrichment and degradation of trace antibiotics in water. The experimental results showed that over 90% sulfamethoxazole could be degraded by the proposed system. The activation energy of the proposed system was 7.9 kJ mol ^−1 , which was significantly lower than those of typical Co catalysts and some carbon-based catalysts. Synergistic effect analysis revealed that catalytic oxidation was the key degradation kinetic of the proposed system, while adsorption showed a significant enhancement effect. Specifically, a compound with large adsorption capacity tended to be degraded preferably and rapidly. Characterization results indicated that N atoms were doped into the graphene framework, resulting in significant impacts on the activation process of potassium bisulfate by activating the sp ^2 C system. Quenching and free radical trapping experiments revealed that degradation catalyzed by the proposed system was a non-free radical oxidation reaction dominated by singlet oxygen. In summary, the proposed design was rational, N-rGO surface provided good adsorption and catalysis sites, the synergistic effect of adsorption and catalytic oxidation led to rapid and effective enrichment and in situ degradation of trace antibiotics in water.https://doi.org/10.1088/2053-1591/ac7284trace antibioticsN-doped grapheneadsorptioncatalytic oxidationsynergistic mechanism |
| spellingShingle | Nan Wu Xuemin Zhang Xue Zhang Kai Yang Yanjuan Li Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism Materials Research Express trace antibiotics N-doped graphene adsorption catalytic oxidation synergistic mechanism |
| title | Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism |
| title_full | Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism |
| title_fullStr | Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism |
| title_full_unstemmed | Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism |
| title_short | Simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by N-doped reduced graphene oxide (N-rGO): synergistic mechanism |
| title_sort | simultaneous degradation of trace antibiotics in water by adsorption and catalytic oxidation induced by n doped reduced graphene oxide n rgo synergistic mechanism |
| topic | trace antibiotics N-doped graphene adsorption catalytic oxidation synergistic mechanism |
| url | https://doi.org/10.1088/2053-1591/ac7284 |
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