The mechanism by which FeS2 promotes the bioleaching of CuFeS2: An electrochemical and DFT study

Zheng, Xingfu; Nie, Zhen-yuan; Jiang, Qian; Yao, Xin; Chen, Jianhua; Liu, Hongchang; Xia, Jin-lan

doi:10.1016/j.mineng.2021.107233

Cited by 9 publications

(5 citation statements)

References 50 publications

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“…The electronic properties of Na x VS 2 are further explored by the projected density of states (PDOS) (Figures a and S9). The pristine VS 2 has metallic properties that remain unchanged even after the adsorption of polysulfides. , Moreover, the work function was calculated (Figures b and S11), which reflects the electron-transfer efficiency . A low figure of merit indicates a higher electron-transfer efficiency.…”

Section: Resultsmentioning

confidence: 99%

“…45,46 Moreover, the work function was calculated (Figures 9b and S11), which reflects the electron-transfer efficiency. 47 A low figure of merit indicates a higher electrontransfer efficiency. Compared with VS 2 , Na x VS 2 has a smaller work function, indicating that sodium storage makes the electron-transfer efficiency faster, which is consistent with the results discussed above.…”

Section: Mechanism Analysismentioning

confidence: 99%

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Altered S–S Coulomb Interactions in Polysulfides Associated with VS₂/S Nanocomposite Electrodes for Na–S Batteries

Huang,

Wang,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Despite the abundant reserves and high theoretical capacity of Na−S batteries, it is still limited by the sluggish reaction kinetics of polysulfides during ultrafast charging and discharging to provide stable and high sodium-ion storage performance. Herein, a catalytic strategy is proposed to change the direction of the Coulomb interaction of S−S bonds to achieve high rate reaction kinetics in polysulfides. In this strategy, a Na x VS 2 structure is constructed in VS 2 /S nanocomposite electrodes to support S for superior performance (784 mA h/g at 0.1 A/g and 512 mA h/g at 10 A/g) during sodium storage process. The electrode can still exhibit stable cycling performance at a very high current density (5000 cycles at 20 A/g). The Na-inserted VS 2 (Na x VS 2 ) changes the charge distribution of S in polysulfide molecules, altering the Coulomb interaction between S atoms in polysulfide to form repulsion-induced breaking of S−S bond. This altering effect on the atomic Coulomb interaction is essential to promoting the conversion reaction of polysulfides. The above strategy of changing the Coulomb interaction between S atoms not only provides a reference for the design of nanostructures for electrochemical processes with multistep reactions but also inspires angles and ideas for realizing high-performance Na−S batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Mechanism Analysismentioning

confidence: 99%

Altered S–S Coulomb Interactions in Polysulfides Associated with VS₂/S Nanocomposite Electrodes for Na–S Batteries

Huang,

Wang,

Wang

et al. 2024

ACS Appl. Nano Mater.

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“…When different ore mixtures are bioleached, the leaching efficiency of ores with lower OCPs was found much higher than that of ores with higher OCPs (Natarajan 1992 ). The electrochemical characteristics of pyrite and chalcopyrite were studied and results showed that the primary cell formed by pyrite and chalcopyrite reduced the ion exchange resistance and promoted the bioleaching efficiency of chalcopyrite (Zheng et al 2021 ).…”

Section: Electrochemical Monitoring Of Biofilm Health In Bioleachingmentioning

confidence: 99%

Advances in bioleaching of waste lithium batteries under metal ion stress

Zhang

Shi²,

Tan³

et al. 2023

Bioresour. Bioprocess.

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In modern societies, the accumulation of vast amounts of waste Li-ion batteries (WLIBs) is a grave concern. Bioleaching has great potential for the economic recovery of valuable metals from various electronic wastes. It has been successfully applied in mining on commercial scales. Bioleaching of WLIBs can not only recover valuable metals but also prevent environmental pollution. Many acidophilic microorganisms (APM) have been used in bioleaching of natural ores and urban mines. However, the activities of the growth and metabolism of APM are seriously inhibited by the high concentrations of heavy metal ions released by the bio-solubilization process, which slows down bioleaching over time. Only when the response mechanism of APM to harsh conditions is well understood, effective strategies to address this critical operational hurdle can be obtained. In this review, a multi-scale approach is used to summarize studies on the characteristics of bioleaching processes under metal ion stress. The response mechanisms of bacteria, including the mRNA expression levels of intracellular genes related to heavy metal ion resistance, are also reviewed. Alleviation of metal ion stress via addition of chemicals, such as spermine and glutathione is discussed. Monitoring using electrochemical characteristics of APM biofilms under metal ion stress is explored. In conclusion, effective engineering strategies can be proposed based on a deep understanding of the response mechanisms of APM to metal ion stress, which have been used to improve bioleaching efficiency effectively in lab tests. It is very important to engineer new bioleaching strains with high resistance to metal ions using gene editing and synthetic biotechnology in the near future.

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Section: Local Coordination Environment Of Lattice-doped Nfe0mentioning

confidence: 99%

“…Different electrical conductivity and hydrophobicity of nFe 0 materials can be obtained by changing the speciation (e.g., FeS, FeS 2 , and CuFeS 2 ), resulting in a disparity in their reactivity and selectivity (Figure 4). 91,92 Coordination numbers that are affected by the valence states of Fe atoms and their coordination composition also need to be focused on. FeS x phases with different Fe coordination numbers also control the material's electron transfer and hydrophobicity; 43 e.g., polysulfides (e.g., Fe 3 S 4 = 0.0 eV) have lower band gap and faster electron transfer than other iron sulfides (e.g., FeS = 0.10 eV, FeS 2 = 0.95 eV).…”

Section: Impacts Of Local Coordinationmentioning

confidence: 99%

Tailoring Fe⁰ Nanoparticles via Lattice Engineering for Environmental Remediation

Chen,

Hu,

Chen

et al. 2023

Environ. Sci. Technol.

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Lattice engineering of nanomaterials holds promise in simultaneously regulating their geometric and electronic effects to promote their performance. However, local microenvironment engineering of Fe 0 nanoparticles (nFe 0 ) for efficient and selective environmental remediation is still in its infancy and lacks deep understanding. Here, we present the design principles and characterization techniques of lattice-doped nFe 0 from the point of view of microenvironment chemistry at both atomic and elemental levels, revealing their crystalline structure, electronic effects, and physicochemical properties. We summarize the current knowledge about the impacts of doping nonmetal p-block elements, transitionmetal d-block elements, and hybrid elements into nFe 0 crystals on their local coordination environment, which largely determines their structure−property−activity relationships. The materials' reactivity−selectivity trade-off can be altered via facile and feasible approaches, e.g., controlling doping elements' amounts, types, and speciation. We also discuss the remaining challenges and future outlooks of using lattice-doped nFe 0 materials in real applications. This perspective provides an intuitive interpretation for the rational design of lattice-doped nFe 0 , which is conducive to real practice for efficient and selective environmental remediation.

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The mechanism by which FeS2 promotes the bioleaching of CuFeS2: An electrochemical and DFT study

Cited by 9 publications

References 50 publications

Altered S–S Coulomb Interactions in Polysulfides Associated with VS₂/S Nanocomposite Electrodes for Na–S Batteries

Altered S–S Coulomb Interactions in Polysulfides Associated with VS₂/S Nanocomposite Electrodes for Na–S Batteries

Advances in bioleaching of waste lithium batteries under metal ion stress

Tailoring Fe⁰ Nanoparticles via Lattice Engineering for Environmental Remediation

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The mechanism by which FeS2 promotes the bioleaching of CuFeS2: An electrochemical and DFT study

Cited by 9 publications

References 50 publications

Altered S–S Coulomb Interactions in Polysulfides Associated with VS2/S Nanocomposite Electrodes for Na–S Batteries

Altered S–S Coulomb Interactions in Polysulfides Associated with VS2/S Nanocomposite Electrodes for Na–S Batteries

Advances in bioleaching of waste lithium batteries under metal ion stress

Tailoring Fe0 Nanoparticles via Lattice Engineering for Environmental Remediation

Contact Info

Product

Resources

About

Altered S–S Coulomb Interactions in Polysulfides Associated with VS₂/S Nanocomposite Electrodes for Na–S Batteries

Altered S–S Coulomb Interactions in Polysulfides Associated with VS₂/S Nanocomposite Electrodes for Na–S Batteries

Tailoring Fe⁰ Nanoparticles via Lattice Engineering for Environmental Remediation