Slow-release persulfate candle-assisted electrochemical oxidation of 2-methylnaphthalene: Effects of chloride, sulfate, and bicarbonate

Septian, Ardie; Shin, Won Sik

doi:10.1016/j.jhazmat.2020.123196

Cited by 15 publications

(1 citation statement)

References 38 publications

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“…ESR group capture measurement was also employed to characterize the existence of SO 4 2− groups. [ 28 ] The spin trap 5, 5‐dimethyl‐1‐pyrroline‐N‐oxide (DMPO) can react with the short‐lived radicals. As a result, spin adducts with a measurable lifetime are formed.…”

Section: Resultsmentioning

confidence: 99%

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn₂S₄ Photoanode for Enhanced Photoelectrochemical Water Splitting

Gao

Meng

et al. 2021

Advanced Energy Materials

105

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friendly properties. [6] However, due to its severe bulk carrier recombination, unfavorable carrier transportation, and sluggish surface OER dynamics, the PEC performance of bare ZnIn 2 S 4 photoanode is still not satisfactory.Various strategies have been developed to enhance the PEC performance of ZnIn 2 S 4 , such as morphology engineering, constructing heterojunctions, and coating surface co-catalysts, etc. [7][8][9] Among them, decorating surface cocatalysts has been considered as an effective strategy to promote surface water oxidation kinetics of pristine ZnIn 2 S 4 . However, the integration of water-oxidation cocatalysts with PEC photoanodes has been limited to metal-based materials, such Co-Pi, FeCoO x , and FeOOH. [10][11][12][13][14][15] The cocatalysts containing metallic ions tend to be toxic and expensive, which could limit their further applications. In addition, these cocatalysts may cause light absorption attenuation and increased charge recombination due to the large thickness/dimension of cocatalysts and additional interface defects between cocatalysts and photo anodes. Recently, nonmetallic anionic groups, such as phosphate (PO 4 3− ), selenate (SeO 4 2− ), and sulfate (SO 4 2− ), have emerged as alternatives to boost water oxidation ability. [16][17][18] These nonmetallic groups could optimize the electronic structure of active sites, regulate the adsorption of intermediates to reduce OER overpotential, and promote the surface carrier transfer. Particularly, the SO 4 2− group can break the adsorption-energy scaling relation between OH* and OOH* (reaction intermediates) and decrease the OER overpotential. [17] Accordingly, engineering ZnIn 2 S 4 with SO 4 2− groups is a promising strategy to improve its surface reaction kinetics. However, the introduction of nonmetallic anionic groups usually relies on a direct mixing method or external addition, which leads to weak chemical interaction and thus decreases the effectiveness and durability of the resultant materials. [17] In contrast, in situ introducing SO 4 2− anionic groups into ZnIn 2 S 4 to induce strong bonding between anions and metal atoms is expected to remarkably facilitate solar water oxidation.As a kind of intrinsic defect for metal sulfide, sulfur vacancies (S v ) have the ability to adjust the electronic structure of metal sulfide, leading to optimization of the adsorption free energy and also improvement of the conductivity. [19,20] S v can be divided into bulk S v and surface S v according to their spatial Severe charge recombination and slow surface water oxidation kinetics seriously limit the practical application of ZnIn 2 S 4 photoanodes for photo electrochemical water splitting. Herein, an in situ strategy to introduce sulfate (SO 4 2− ) anions and controlled bulk sulfur vacancies (S v ) into a ZnIn 2 S 4 photoanode is developed, and its PEC performance is remarkably enhanced, achieving a photocurrent density of 3.52 mA cm −2 at 1.23 V versus reversible hydrogen electrode (V RHE ) and negatively shifted onset potential of 0....

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Section: Resultsmentioning

confidence: 99%

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn₂S₄ Photoanode for Enhanced Photoelectrochemical Water Splitting

Gao

Meng

et al. 2021

Advanced Energy Materials

105

View full text Add to dashboard Cite

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The long-term effect of Fe3O4 in activating persulfate to degrade refractory organic contaminants for groundwater remediation

Xiao,

Zhang,

Zhou

et al. 2024

Chemical Engineering Journal

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Development of novel persulfate tablets for passive trichloroethylene (TCE)-contaminated groundwater remediation

Chang

Chen

et al. 2022

Chemosphere

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Slow-release persulfate candle-assisted electrochemical oxidation of 2-methylnaphthalene: Effects of chloride, sulfate, and bicarbonate

Cited by 15 publications

References 38 publications

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn₂S₄ Photoanode for Enhanced Photoelectrochemical Water Splitting

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn₂S₄ Photoanode for Enhanced Photoelectrochemical Water Splitting

The long-term effect of Fe3O4 in activating persulfate to degrade refractory organic contaminants for groundwater remediation

Development of novel persulfate tablets for passive trichloroethylene (TCE)-contaminated groundwater remediation

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Slow-release persulfate candle-assisted electrochemical oxidation of 2-methylnaphthalene: Effects of chloride, sulfate, and bicarbonate

Cited by 15 publications

References 38 publications

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn2S4 Photoanode for Enhanced Photoelectrochemical Water Splitting

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn2S4 Photoanode for Enhanced Photoelectrochemical Water Splitting

The long-term effect of Fe3O4 in activating persulfate to degrade refractory organic contaminants for groundwater remediation

Development of novel persulfate tablets for passive trichloroethylene (TCE)-contaminated groundwater remediation

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Product

Resources

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Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn₂S₄ Photoanode for Enhanced Photoelectrochemical Water Splitting

Incorporation of Sulfate Anions and Sulfur Vacancies in ZnIn₂S₄ Photoanode for Enhanced Photoelectrochemical Water Splitting