Self-made anion-exchange membrane with polyaniline as an additive for sulfuric acid enrichment

Xie, Ruosong; Ning, Ping; Qu, Guangfei; Li, Junyan; Ren, Meijie; Du, Caidong; Gao, Haijun; Li, Zhishuncheng

doi:10.1016/j.cej.2018.02.012

Cited by 30 publications

(10 citation statements)

References 53 publications

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“…The mechanism of anion migration in dense PANI/PVDF membrane has been reported as this: anions are migrating mainly through the molecular chains of protonated PANI 23 . For the etched membrane (by 98 wt.%), the porosity increased from 1.4% to 10.6%.…”

Section: Resultsmentioning

confidence: 96%

“…The highest concentration of enriched H 2 SO 4 solution of the etched PANI/PVDF membrane has reached the level of commercial membrane (about 42 wt.%), 23 which could be applied to titanium production. Therefore, the energy consumption among etched membrane and commercial membranes was compared at Table 3.…”

Section: Resultsmentioning

confidence: 99%

“…A compact PANI/PVDF membrane was fabricated through dry phase inversion methods 23 . The content of PANI in membrane was 20 wt.%.…”

Section: Methodsmentioning

confidence: 99%

“…The self‐designed electrodialysis was shown at Figure 1(B) 23 . The volumes of condense chamber and dilute chamber were 69 ml and 45 ml, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…For the wet phase inversion method, most part of micropores tend to be formed by PVDF since pores are formed by the separation of solvent, and moreover, PVDF is more soluble in N ‐Methyl‐2‐pyrrolidone (NMP). A half‐dense PANI/PVDF membrane was previously fabricated by thermal phase inversion for sulfuric acid enrichment, in which, proton leakage was inhibited owning to the dense structure, the hydrophobic nature, and the mechanism of anion migration 23 . However, the migration of counter‐ions was also inhibited, increasing the membrane resistance.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of proton block and highly conductive AEM by creating PANI dominated and hydrophobicity ion channels for sulfuric acid enrichment

Xie

Ning

et al. 2021

Polymers for Advanced Techs

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Electrodialysis is widely used to separate and concentrate sulfuric acid from industrial wastewater. Nevertheless, owing to the proton leakage of anion‐exchange membrane (AEM), the concentration of recycled sulfuric acid is typically less than 20 wt.%. What is more, the restraining of proton leakage would sacrifice the conductivity of membrane, leading to the increasing of energy consumption (EC). In this work, a proton block and highly conductive polyaniline (PANI)/polyvinylidene fluoride (PVDF) membrane were prepared by creating PANI dominated and hydrophobicity ion channels through etching. The variations of solubility, structure, and electrical performance of membrane during etching process were investigated. As a result, the electrical performance of membrane, especially for the conductivity, was significantly improved owning to the formation of PANI dominated ion channels and spaces. Meanwhile, even the porosity and water content of etched membrane were improved, the anions were mainly migrated through molecular chains of PANI; the protons were still blocked by the hydrophobic pores. Further, the etched membranes with different porosities were used to enrich sulfuric acid (1 wt.%) through electrodialysis. As a result, the proton leakage was proved to be the major limitative factor of acid solution enrichment. By using the optimal etched membrane, concentrated acid (41 wt.%) was obtained with a less energy consume (EC), compared with commercial AEM.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

“…A compact PANI/PVDF membrane was fabricated through dry phase inversion methods 23 . The content of PANI in membrane was 20 wt.%.…”

Section: Methodsmentioning

confidence: 99%

“…The self‐designed electrodialysis was shown at Figure 1(B) 23 . The volumes of condense chamber and dilute chamber were 69 ml and 45 ml, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Preparation of proton block and highly conductive AEM by creating PANI dominated and hydrophobicity ion channels for sulfuric acid enrichment

Xie

Ning

et al. 2021

Polymers for Advanced Techs

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Evolution of Vanadium Redox Flow Battery in Electrode

Hossain

Abdullah

Tan

et al. 2023

The Chemical Record

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The vanadium redox flow battery (VRFB) is a highly regarded technology for large‐scale energy storage due to its outstanding features, such as scalability, efficiency, long lifespan, and site independence. This paper provides a comprehensive analysis of its performance in carbon‐based electrodes, along with a comprehensive review of the system‘s principles and mechanisms. It discusses potential applications, recent industrial involvement, and economic factors associated with VRFB technology. The study also covers the latest advancements in VRFB electrodes, including electrode surface modification and electrocatalyst materials, and highlights their effects on the VRFB system‘s performance. Additionally, the potential of two‐dimensional material MXene to enhance electrode performance is evaluated, and the author concludes that MXenes offer significant advantages for use in high‐power VRFB at a low cost. Finally, the paper reviews the challenges and future development of VRFB technology.

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