Sulfur vacancy rich MoS2/FeMoO4 composites derived from MIL-53(Fe) as PMS activator for efficient elimination of dye: Nonradical 1O2 dominated mechanism

Wang, Qiao; Lu, Jiahong; Yu, Meirui; Li, Huarui; Lin, Xinhong; Nie, Jinxu; Li, Nan; Wang, Zhihong

doi:10.1016/j.envpol.2023.121990

Cited by 27 publications

(5 citation statements)

References 65 publications

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“…Under illumination, a decline in ROS detection was attributed to the strong adsorption of ROSs by surface oxygen vacancies . Prior studies proposed that SVs, with high surrounding electron density, ,,− might act as reduction reaction sites for radical ROS capture. SV sites exhibited strong adsorption of •OH within an energetically favorable adsorption energy. , It was reasonable to infer that ROSs generated in photoreactions were not entirely utilized for contaminant degradation, explaining the lower SMX removal observed under light compared to that under darkness.…”

Section: Resultsmentioning

confidence: 99%

“…These SVs on pyrite enhance the adsorption of H 2 O, overcoming the energy barrier for H 2 O oxidation with a strong exothermic effect. Moreover, SVs aid in H 2 O decomposition to produce ROSs . However, natural pyrite undergoes redox oscillations due to hydrological fluctuations, creating oxygen-rich environments.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, SVs aid in H 2 O decomposition to produce ROSs. 28 However, natural pyrite undergoes redox oscillations due to hydrological fluctuations, creating oxygen-rich environments. This may promote the transfer of electrons from redox-active substances to oxygen in a nonphotochemical manner.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments

Zhu,

Wang,

Sun

et al. 2024

Environ. Sci. Technol.

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Pharmaceutical residues in sediments are concerning as ubiquitous emerging contaminants. Pyrite is the most abundant sulfide minerals in the estuarine and coastal sediments, making it a major sink for pharmaceutical pollutants such as sulfamethoxazole (SMX). However, research on the adsorption and redox behaviors of SMX on the pyrite surface is limited. Here, we investigated the impact of the nonphotochemical process of pyrite on the fate of coexisting SMX. Remarkably, sulfur vacancies (SVs) on pyrite promoted the generation of nonradical species (hydrogen peroxide, H 2 O 2 and singlet oxygen, 1 O 2 ), thereby exhibiting prominent SMX degradation performance under darkness. Nonradical 1 O 2 contributed approximately 73.1% of the total SMX degradation. The SVs with high surrounding electron density showed an advanced affinity for adsorbing O 2 and then initiated redox reactions in the sediment electron-storing geobattery pyrite, resulting in the extensive generation of H 2 O 2 through a two-electron oxygen reduction pathway. Surface Fe(III) (hydro)oxides on pyrite facilitated the decomposition of H 2 O 2 to 1 O 2 generation. Distinct nonradical products were observed in all investigated estuarine and coastal samples with the concentrations of H 2 O 2 ranging from 1.96 to 2.94 μM, while the concentrations of 1 O 2 ranged from 4.63 × 10 −15 to 8.93 × 10 −15 M. This dark-redox pathway outperformed traditional photochemical routes for pollutant degradation, broadening the possibilities for nonradical species use in estuarine and coastal sediments. Our study highlighted the SV-triggered process as a ubiquitous yet previously overlooked source of nonradical species, which offered fresh insights into geochemical processes and the dynamics of pollutants in regions of frequent redox oscillations and sulfur-rich sediments.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments

Zhu,

Wang,

Sun

et al. 2024

Environ. Sci. Technol.

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“…A MoS2/FeMoO4 composite was formed by introducing MoS2 (which actuate as inorganic promoter) into MIL-53(Fe)-derived PMS-activator [157]. The prepared MoS2/FeMoO4 activated peroxymonosulfate (PMS) to reach 99.7% of Rhodamine B degradation after 20 min.…”

Section: Photocatalytic Degradation Of Methylene Blue Was Improved At...mentioning

confidence: 99%

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Alguacil,

Alonso

2024

Preprint

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The presence of organic dyes in aqueous environments is of extreme hazardousness against life due to the toxicity of these compounds. Thus, its removal from these various aquatic media is of the utmost importance and several technologies are constantly proven to match this goal. Among these technologies, various types of degradation and adsorption are the most widely used, and of the various types of materials used within these technologies, nanomaterials are constantly developed and investigated, probably due to the various properties that these nanomaterials presented. This work reviewed recent developments (2023 year) about the use of these nanomaterials on the treatment of solutions contaminated with these toxic organic dyes.

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“…To investigate the roles of different active species in the photodegradation system, a series of reactive species quenching experiments were conducted. [60][61][62] As shown in Fig. 10, the degradation rate of TC by MoS 2 /ZnO/ PMS reached 99.8% after 30 min in the absence of trapping agents.…”

Section: àmentioning

confidence: 99%

Highly efficient degradation of tetracycline by activated peroxymonosulfate over MoS₂/ZnO heterostructure nanocomposites

Jiang,

Wang,

Zhou

et al. 2023

New J. Chem.

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Sulfur vacancy rich MoS2/FeMoO4 composites derived from MIL-53(Fe) as PMS activator for efficient elimination of dye: Nonradical 1O2 dominated mechanism

Cited by 27 publications

References 65 publications

Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments

Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Highly efficient degradation of tetracycline by activated peroxymonosulfate over MoS₂/ZnO heterostructure nanocomposites

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Sulfur vacancy rich MoS2/FeMoO4 composites derived from MIL-53(Fe) as PMS activator for efficient elimination of dye: Nonradical 1O2 dominated mechanism

Cited by 27 publications

References 65 publications

Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments

Sulfur Vacancies in Pyrite Trigger the Path to Nonradical Singlet Oxygen and Spontaneous Sulfamethoxazole Degradation: Unveiling the Hidden Potential in Sediments

Removal of Hazardous Organic Dyes from Liquid Wastes Using Advanced Nanomaterials

Highly efficient degradation of tetracycline by activated peroxymonosulfate over MoS2/ZnO heterostructure nanocomposites

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Product

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Highly efficient degradation of tetracycline by activated peroxymonosulfate over MoS₂/ZnO heterostructure nanocomposites