Partition of heavy metals (Hg, Cd, and Pb) between sphalerite and hydrothermal solution and the typomorphism of sphalerite surface: XPS, AES, and AFM data

Таусон, В. Л.; Babkin, D. N.; Lipko, S. V.; Lustenberg, E. E.; Parkhomenko, I. Yu.; Pastushkova, T. M.; Loginov, P. B.; Логинов, Б. А.

doi:10.1134/s0016702910010076

Cited by 13 publications

(3 citation statements)

References 8 publications

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“…To further illustrate the valence state properties of the Ru element, the spectrum of Ru 3p was measured (Figure c). The Ru 3p and Ru 3d spectra presented peaks at 484.12, 461.98, 284.68, and 280.78 eV, corresponding to the binding energy of Ru 3p 1/2 , Ru 3p 3/2 , Ru 3d 3/2 , and Ru 3d 5/2 , which indicated that the Ru valence state was +2. , Figure d displays the high-resolution spectra of Cd 3d, which indicates that the Cd ions are in the +2 valence state according to the literature . The Si 2p and W 4f XPS spectra as well as the bond valence sum calculations of Si and W (Table S4) consistently indicate that the valence states of Si and W are +4 and +6, respectively …”

Section: Resultsmentioning

confidence: 65%

“…37,38 Figure 3d displays the highresolution spectra of Cd 3d, which indicates that the Cd ions are in the +2 valence state according to the literature. 39 The Si 2p and W 4f XPS spectra as well as the bond valence sum calculations of Si and W (Table S4) consistently indicate that the valence states of Si and W are +4 and +6, respectively. 34 Photoelectrochemical Properties.…”

Section: ■ Introductionmentioning

confidence: 62%

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Metalloligand Hybrid Polyoxometalates for Efficient Selective Photocatalytic Oxidation of Sulfides to Sulfoxides under Visible-Light Irradiation

Liu

Luo

et al. 2022

J. Phys. Chem. C

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The development of novel high-efficiency photocatalysts to solve the bottleneck problems of low efficiency and harsh conditions of organic oxidation reactions is of vital significance. In this paper, a novel hybrid polyoxometalate (POM) crystal, (C 2 H 8 N) 6 [SiW 11 CdO 39 ][Ru(bpy) 2 (dcbpy)]• DMF•5.5H 2 O (RuCd−SiW), was synthesized by combining the metalloligand [Ru(bpy) 2 (dcbpy)] with the oxidation catalyst POM. The introduction of the metalloligand extended the light absorption range of RuCd−SiW to the visible region, while electrochemical measurements demonstrated its potential as an excellent photocatalyst. Under visible light (λ > 400 nm) irradiation with O 2 as the sole oxidant, RuCd−SiW showed highly efficient photocatalytic activity for the selective oxidation of thioanisole to (methylsulfoxide)benzene with a yield of 99.5%, a turnover number of 497.5, and a turnover frequency of 103 h −1 . Particularly, the yield of (methylsulfoxide)benzene was still higher than 99% after five rounds of recycling, demonstrating its high stability and recyclability.

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Section: Resultsmentioning

confidence: 65%

Section: ■ Introductionmentioning

confidence: 62%

Metalloligand Hybrid Polyoxometalates for Efficient Selective Photocatalytic Oxidation of Sulfides to Sulfoxides under Visible-Light Irradiation

Liu

Luo

et al. 2022

J. Phys. Chem. C

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“…2b-b' to 2e-e', Table 1). The formation and evolution of sub-micro sized surface secondary structures has been typically attributed to sphalerite oxidation under different weathering conditions (Giudicci et al 2002;Tauson et al 2010), but the report of the formation of dissolution patterns on the mineral surface was unprecedented with AFM. Note that highest Ra (nm) and Rq (nm) parameters was determined for samples in 0.1 M H2SO4 solution revealing that sphalerite oxidation occurring in these conditions are more prone to generate and accumulate secondary compounds on altered surfaces (Fig.…”

Section: Mineralogical Analysis Of Samplesmentioning

confidence: 99%

Insigths of sphalerite weathering under simulated acidic, circumneutral and alkaline conditions to account for mineral activity and potential Zn release

Sosa-Rodríguez

Vazquez‐Arenas

Ponce-Peña

et al. 2022

Preprint

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The present study combines surface analyses of pristine and leached low Fe-bearing and Pb-bearing sphalerite (PbS-ZnS) samples including XPS, GDOES, Raman spectroscopy, SEM and AFM, along with chemical evolution of leachates after 24 h of contact with 0.1 M NaOH, 0.1 M NaNO3, 0.1 M H2SO4 or 0.1 M HClO4 solution. A comprehensive electrochemical analysis using Cyclic voltammetry, Chronopotentiometry, Chronoamperometry, Linear sweep voltammetry and Tafel plots of PbS-ZnS and marmatite-like sphalerite (FeZnS) are conducted to compare its oxidation activities. Mineral characterizations reveal sluggish weathering linked to inhomogeneous and minor secondary polysulfides (Sn2−) surface compounds distribution, thus defining bare modifications of surface-activity relationships. The occurrence of secondary Zn-bearing compounds was not identified on altered samples, which suggests that this heavy metal diffuses into the bulk-solution. Electrochemical assessments confirm sluggish sphalerite oxidation mainly composed by two subsequent stages, where the highest mineral activity was obtained in NaOH conditions. It was found that the sphalerite oxidation is more active in the presence of Pb, while the activity of sphalerite gradually decreases when it is a mineral rich in Fe probably associated with progressive accumulation of Sn2−/S0 compounds. We suggest general oxidation mechanisms for sphalerite, and their environmental implications are discussed.

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Trace and minor element variations and sulfur isotopes in crystalline and colloform ZnS: Incorporation mechanisms and implications for their genesis

et al. 2011

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Partition of heavy metals (Hg, Cd, and Pb) between sphalerite and hydrothermal solution and the typomorphism of sphalerite surface: XPS, AES, and AFM data

Cited by 13 publications

References 8 publications

Metalloligand Hybrid Polyoxometalates for Efficient Selective Photocatalytic Oxidation of Sulfides to Sulfoxides under Visible-Light Irradiation

Metalloligand Hybrid Polyoxometalates for Efficient Selective Photocatalytic Oxidation of Sulfides to Sulfoxides under Visible-Light Irradiation

Insigths of sphalerite weathering under simulated acidic, circumneutral and alkaline conditions to account for mineral activity and potential Zn release

Trace and minor element variations and sulfur isotopes in crystalline and colloform ZnS: Incorporation mechanisms and implications for their genesis

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