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MoS2 Nanosheets Anchored onto MIL-100(Fe)-Derived FeS2 as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism
https://orcid.org/0000-0002-7830-5969
By anchoring MoS2 nanosheets onto FeS2 derived from different MIL-100(Fe) precursors, a series of FeS2@MoS2-x samples featuring sulfur vacancies (SVs) were prepared as efficient peroxymonosulfate (PMS) activators to degrade sulfamethoxazole (SMX) from aqueous solution. Benefiting from the strongly reductive sulfur species (S2– and S2 2–), enriched Mo(IV) sites, and abundant SVs, 40 μM SMX was completely removed by the FeS2@MoS2-2/PMS system in 7 min (0.2 g/L FeS2@MoS2-2, 0.25 mM PMS). The k obs obtained by FeS2@MoS2-2 was 0.598 min–1, which was 5.8 and 51.1 times higher than that of FeS2 (0.103 min–1) and MoS2 (0.012 min–1), respectively. Quenching experiments, electron paramagnetic resonance (EPR) analysis, and 18O isotope labeling tests evidenced the involvement of radical (•OH, SO4 •–) and non-radical (1O2, FeIV = O) pathways in the FeS2@MoS2-2/PMS system, and MoS2 anchoring enormously enhanced the contribution of non-radicals to 45.5%. In addition, SVs possessed favorable affinity toward PMS and dissolved oxygen (DO), promoting continuous production of reactive active species. The degradation pathways of SMX were unveiled as well. The satisfactory recyclability, stability, and universality enabled FeS2@MoS2-2 to serve as a promising candidate for PMS activation. This study provides a novel strategy to construct sulfur vacancy-featuring Fe-based sulfide catalysts using MIL-100(Fe) as sacrificial templates for activating PMS to treat refractory organic-polluted water.
Sulfur vacancy-enriched FeS2@MoS2 is developed to activate peroxymonosulfate for efficient degradation of refractory organic pollutants in water.
MoS2 Nanosheets Anchored onto MIL-100(Fe)-Derived FeS2 as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism
https://orcid.org/0000-0002-7830-5969
By anchoring MoS2 nanosheets onto FeS2 derived from different MIL-100(Fe) precursors, a series of FeS2@MoS2-x samples featuring sulfur vacancies (SVs) were prepared as efficient peroxymonosulfate (PMS) activators to degrade sulfamethoxazole (SMX) from aqueous solution. Benefiting from the strongly reductive sulfur species (S2– and S2 2–), enriched Mo(IV) sites, and abundant SVs, 40 μM SMX was completely removed by the FeS2@MoS2-2/PMS system in 7 min (0.2 g/L FeS2@MoS2-2, 0.25 mM PMS). The k obs obtained by FeS2@MoS2-2 was 0.598 min–1, which was 5.8 and 51.1 times higher than that of FeS2 (0.103 min–1) and MoS2 (0.012 min–1), respectively. Quenching experiments, electron paramagnetic resonance (EPR) analysis, and 18O isotope labeling tests evidenced the involvement of radical (•OH, SO4 •–) and non-radical (1O2, FeIV = O) pathways in the FeS2@MoS2-2/PMS system, and MoS2 anchoring enormously enhanced the contribution of non-radicals to 45.5%. In addition, SVs possessed favorable affinity toward PMS and dissolved oxygen (DO), promoting continuous production of reactive active species. The degradation pathways of SMX were unveiled as well. The satisfactory recyclability, stability, and universality enabled FeS2@MoS2-2 to serve as a promising candidate for PMS activation. This study provides a novel strategy to construct sulfur vacancy-featuring Fe-based sulfide catalysts using MIL-100(Fe) as sacrificial templates for activating PMS to treat refractory organic-polluted water.
Sulfur vacancy-enriched FeS2@MoS2 is developed to activate peroxymonosulfate for efficient degradation of refractory organic pollutants in water.
MoS2 Nanosheets Anchored onto MIL-100(Fe)-Derived FeS2 as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism
https://orcid.org/0000-0002-7830-5969
By anchoring MoS2 nanosheets onto FeS2 derived from different MIL-100(Fe) precursors, a series of FeS2@MoS2-x samples featuring sulfur vacancies (SVs) were prepared as efficient peroxymonosulfate (PMS) activators to degrade sulfamethoxazole (SMX) from aqueous solution. Benefiting from the strongly reductive sulfur species (S2– and S2 2–), enriched Mo(IV) sites, and abundant SVs, 40 μM SMX was completely removed by the FeS2@MoS2-2/PMS system in 7 min (0.2 g/L FeS2@MoS2-2, 0.25 mM PMS). The k obs obtained by FeS2@MoS2-2 was 0.598 min–1, which was 5.8 and 51.1 times higher than that of FeS2 (0.103 min–1) and MoS2 (0.012 min–1), respectively. Quenching experiments, electron paramagnetic resonance (EPR) analysis, and 18O isotope labeling tests evidenced the involvement of radical (•OH, SO4 •–) and non-radical (1O2, FeIV = O) pathways in the FeS2@MoS2-2/PMS system, and MoS2 anchoring enormously enhanced the contribution of non-radicals to 45.5%. In addition, SVs possessed favorable affinity toward PMS and dissolved oxygen (DO), promoting continuous production of reactive active species. The degradation pathways of SMX were unveiled as well. The satisfactory recyclability, stability, and universality enabled FeS2@MoS2-2 to serve as a promising candidate for PMS activation. This study provides a novel strategy to construct sulfur vacancy-featuring Fe-based sulfide catalysts using MIL-100(Fe) as sacrificial templates for activating PMS to treat refractory organic-polluted water.
Sulfur vacancy-enriched FeS2@MoS2 is developed to activate peroxymonosulfate for efficient degradation of refractory organic pollutants in water.
MoS2 Nanosheets Anchored onto MIL-100(Fe)-Derived FeS2 as a Peroxymonosulfate Activator for Efficient Sulfamethoxazole Degradation: Insights into the Mechanism
Peng, Ting (author) / Zhang, Haojie (author) / Xia, Simeng (author) / Zhou, Shiqing (author) / Shi, Zhou (author) / Li, Guangchao (author) / Deng, Lin (author)
ACS ES&T Water ; 3 ; 213-226
2023-01-13
Article (Journal)
Electronic Resource
English
G-C3N4 anchored with MoS2 ultrathin nanosheets as high performance anode material for supercapacitor
| British Library Online Contents | 2019
| American Chemical Society | 2022
| Wiley | 2019