Revisiting the adsorption of antimony on manganese dioxide: The overlooked dissolution of manganese

Nie, Jiawei; Yao, Ziwei; Shao, Ping; Jing, Yunpeng; Bai, Langming; Xing, Defeng; Yi, Genping; Li, Dewei; Liu, Yanbiao; Yang, Liming; Yu, Kai; Luo, Xubiao

doi:10.1016/j.cej.2021.132468

Cited by 19 publications

(3 citation statements)

References 40 publications

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“…Compared to the proportion of Mn(II)/Mn(III) before adsorption, the value increased after Sb(III) adsorption. This means the reduction of Mn and also proves that Sb(III) has been oxidized [51]. Besides, hydrogen bonding between antimony and the hydroxyl group on the surface of CLMH and the intercalation of Sb between layers of LDH also contribute to the adsorption process [45,52].…”

Section: Mechanismmentioning

confidence: 79%

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Zhang¹,

Xie²,

Guo³

et al. 2022

Nanotechnology

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Actuated by the non-ionic heavy metal of antimony (Sb) contaminants with undesired toxicity to the environment and human health, capturing Sb is urgent to remedy contaminated water. Herein, the lamellar MnCo hydrotalcite was grown on catkin-derived biochar through the in-situ etching of ZIF-L to construct a hierarchical microtube@nanosheet hybrid (CLMH) for Sb immobilization. The adsorption behaviour and mechanism of trivalent antimony (Sb (III)) on the CLMH were investigated. The CLMH shows good pH applicability for capturing Sb(III) at pH from 2 to 9. The excellent adsorption capacity of CLMH for Sb(III) is 247.62 mg/g at 303 K, and the endothermic process is proved by the positive value of ΔH^0 (10.54 kJ mol-1). The adsorption process is fitted with the intra-particle diffusion model, which can be described with external mass transfer, intraparticle diffusion in pores, and equilibrium stage. The adsorption mechanism is proved, which includes the bind of Metal-O-Sb bonds by inner-sphere complex, the embedding of Sb in the intercalation of hydrotalcite, redox between Mn and Sb, and functional groups dependent anchoring effect. The work benefits the understanding of the antimony removal behaviour over the hierarchical microtube@nanosheet hybrids.

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Section: Mechanismmentioning

confidence: 79%

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Zhang¹,

Xie²,

Guo³

et al. 2022

Nanotechnology

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“…Meanwhile, the peak separation analysis indicated that the extracted Sb species comprised a blend of trivalent and zerovalent states, primarily existing as metal oxide (Figure S11c). ,− Therefore, a logical conclusion can be drawn that the electroreduction products resulting from the Sb(III) solution constitute a composite of Sb 0 and Sb 2 O 3 .…”

Section: Results and Discussionmentioning

confidence: 99%

Electrodeposited Palladium Nanoparticles Enhancing Atomic Hydrogen-Mediated Electrochemical Recovery of Antimony

Wei,

Qiu,

Wang

et al. 2024

ACS EST Eng.

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Electro-generated atomic hydrogen (H*) emerges as a potent species for water contaminant remediation, yet its short life span and confinement to the electrode−solution interface have restricted its broader application. Herein, we investigated the efficacy of palladium nanoparticles loaded onto a carbon cloth (hereafter the Pd/CC) electrode in stabilizing surface atomic H* and enhancing its electroreduction performance against toxic antimonite Sb(III). In comparison to the CC electrode, the Pd/CC electrode exhibited a 0.4 V increase in the onset potential of H + electroreduction and a 5.5-fold improvement in electrochemically active surface area. Additionally, the Sb(III) removal rate constant and metallic antimony (Sb 0 ) formation on the Pd/CC electrode surface were increased by 2.2-and 5.1-fold, respectively. Quenching experiments showed a 20% reduction ratio of atomic H* to Sb(III) at −1.0 V vs Ag/AgCl. Moreover, in situ trapping combined with semiquantification via electron spin resonance indicated that ca. 89% of atomic H* participated in Sb(III) reduction. The exposed crystal surface of Pd nanoparticles increased the electron transport capacity and atomic H* coverage on the electrode surface, which provided a large number of reduction sites for the direct and indirect reductions of Sb(III). Furthermore, accumulated reduction products were easily recovered in dilute H 2 SO 4 , rendering the electrode reusable. This work offers a practical and innovative solution for remediating heavy-metalpolluted wastewater and simultaneously recovering metal resources.

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“…Although experimental studies provide valuable insight into Ba 2+ dissolution, the underlying mechanisms and the key factor in controlling dissolution remain unclear. Dissolution of surface components occurring at the solid/liquid interfaces is a non-trivial process because it accompanies complicated interactions between surfaces, solvent molecules, and ionic species. − Especially, the surface facets and phases have a great impact on the dissolution of the surface atoms. It has been reported that a surface with many defects or high surface energy shows more dissolution than closed-packed and stable surfaces. − Therefore, a comprehensive understanding of the complex interactions between solvent molecules/ionic species and the various facets is required to elucidate the Ba 2+ dissolution mechanism.…”

Section: Introductionmentioning

confidence: 99%

Facet-Dependent Ba Dissolution of Tetragonal BaTiO₃ Single Crystal Surfaces

2023

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Tetragonal BaTiO3 with a high dielectric property is used as the principal material for multilayer ceramic capacitors (MLCCs), a core component of state-of-the-art electronic devices. However, Ba2+ at BaTiO3 surfaces can be dissolved in aqueous-based media, and such chemical instability has been a major obstacle to environmentally friendly aqueous-based MLCC processes. To understand the behavior of Ba2+ dissolution, we investigated H2O(l) and (H+ + Cl–)(aq.) adsorption on the single crystal surfaces of BaTiO3(100), (111), and (110) using density functional theory calculations. We found that the onset pH for Ba2+ dissolution is 1.65, 2.46, and 3.18 for BaTiO3(100), (111), and (110), respectively, indicating that the thermodynamics of Ba2+ dissolution are facet dependent. The onset pH and the coordination number (CN) of Ba on each surface shows a linear correlation, suggesting that the CN of Ba is a critical factor that can predict the Ba2+ dissolution thermodynamics.

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Revisiting the adsorption of antimony on manganese dioxide: The overlooked dissolution of manganese

Cited by 19 publications

References 40 publications

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Electrodeposited Palladium Nanoparticles Enhancing Atomic Hydrogen-Mediated Electrochemical Recovery of Antimony

Facet-Dependent Ba Dissolution of Tetragonal BaTiO₃ Single Crystal Surfaces

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Revisiting the adsorption of antimony on manganese dioxide: The overlooked dissolution of manganese

Cited by 19 publications

References 40 publications

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Biochar microtube interconnected hydrotalcite nanosheets for the adsorption of aqueous Sb(III)

Electrodeposited Palladium Nanoparticles Enhancing Atomic Hydrogen-Mediated Electrochemical Recovery of Antimony

Facet-Dependent Ba Dissolution of Tetragonal BaTiO3 Single Crystal Surfaces

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Facet-Dependent Ba Dissolution of Tetragonal BaTiO₃ Single Crystal Surfaces