Influence of synthesis conditions over simonkolleite/ZnO precipitation

Cousy, Simon; Gorodylova, Nataliia; Svoboda, Ladislav; Zelenka, J.

doi:10.1007/s11696-017-0226-4

Cited by 24 publications

(23 citation statements)

References 21 publications

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“…PHREEQC Pitzer's database was also constrained to include only those solid phases that were found to govern solubility. In the case of Cd 2+ and Zn 2+ dissolved in solutions containing high chlorides concentration, apart from hydroxides, zinc and cadmium hydroxy chlorides, can be formed during hydroxide precipitation [25,26]. Therefore, in the case of NaCl-ZnCl 2 -H 2 O system considering Zn 5 (OH) 8 Cl 2 precipitate [27,28], and in the case of NaCl-CdCl 2 -H 2 O system CdOHCl are valid [29].…”

Section: Zinc and Cadmium Solubility Predictionsmentioning

confidence: 99%

“…This phenomenon may be explained by considering the kinetics of the precipitation. An analysis presented by Cousy et al [26] shows that in the case of Zn solutions containing a high concentration of Clanion, a zinc hydroxide salt precipitates changes over that time [27]. Taking into account that reaching equilibrium in such systems is prolonged, we can assume that the experimental samples shown in Fig.…”

Section: Zinc Systemmentioning

confidence: 99%

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Influence of High Chloride Concentration on pH Control in Hydroxide Precipitation of Heavy Metals

Stec

Jagustyn

Słowik

et al. 2020

J. Sustain. Metall.

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Removal of zinc and cadmium from highly saline solutions by hydroxide precipitation is discussed. Experimental solubilities of zinc and cadmium in highly saline solutions were compared to modeled results obtained using Pitzer's approach. An amphoteric character of zinc and cadmium and an influence of chloride ion on the concentration of dissolved metals were investigated. In order to avoid errors linked to pH measurements in concentrated aqueous solutions, the method of calibration of glass pH electrodes was developed and evaluated. The method uses easily prepared buffers whose pHs were determined with the Pitzer ion-interaction approach. The presented investigations address two issues of high significance in industrial wastewater treatment, namely: precise pH measurements and rigorous modeling of highly saline wastewaters. The results can be implemented in the treatment of hydrometallurgical wastewaters such as zinc refinery wastewater. Additionally, an implementation of the presented investigations is not limited to wastewater treatment but can easily be extended to other high-chloride metallurgical processes wherein the pH measurements in highly saline streams are required.

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Section: Zinc and Cadmium Solubility Predictionsmentioning

confidence: 99%

Section: Zinc Systemmentioning

confidence: 99%

Influence of High Chloride Concentration on pH Control in Hydroxide Precipitation of Heavy Metals

Stec

Jagustyn

Słowik

et al. 2020

J. Sustain. Metall.

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“…ε-Zn(OH) 2 (s)  Zn(OH) 2 (sol)  β-Zn(OH) 2 (s) → ZnO (s) + H 2 O (ref 45 ) V. ZnO (S) + H 2 O → Zn 2+ + 2HO -(ref -51 ) VI. 5 Zn 2+ + 8 OH -+ 2Cl -+ H 2 O → Zn 5 (OH) 8 Cl 2 •H 2 O (ref52,53 ) VII. 5 ZnO + 2CO 2 + 3H 2 O  Zn 5 (CO 3 ) 2 (OH) 6 (ref41 )…”

mentioning

confidence: 99%

Oxidative ionothermal synthesis for micro and macro Zn-based materials

2020

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“…This also was confirmed by EDS mapping of cycled Zn anodes with/without TPAH, which shows the presence of Zn, O, and Cl (Supplementary Figure S3). It can be noted that simonkolleite, which acts as a corrosion stabilizer, forms in case of high Cl content and low pH value (Yoo et al, 2013;Cousy et al, 2017;Li et al, 2019c). The comparison of Zn electrode surface morphology cycled in beaker cells with and without TPAH addition was done by SEM.…”

Section: Resultsmentioning

confidence: 99%

“…Simonkolleite is unstable and can decompose to ZnO and ZnCl 2 or to ZnO + HCl + H 2 O (Zhang and Yanagisawa, 2007;Yoo et al, 2013;Moezzi et al, 2016). It is interesting to notice that simonkolleite disks appear with the combination of lower alkalinity, lower temperature, and higher NH 4 + ions concentration and in existence of Cl − anion (Li et al, 2011;Cousy et al, 2017). Second, when the battery starts to cycle at high C rate (20 C), Zn dendrites are formed on anode by applying a negative current.…”

Section: Resultsmentioning

confidence: 99%

Tetrapropylammonium Hydroxide as a Zinc Dendrite Growth Suppressor for Rechargeable Aqueous Battery

Kurmanbayeva¹,

Rakhymbay²,

Korzhynbayeva³

et al. 2020

Front. Energy Res.

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Zinc metal is widely used as an anode in various aqueous systems. However, zinc anode suffers from the dendrite formation on the surface upon cycling leading to a poor cyclability of a cell and its termination due to short circuit. In this work, the effect of tetrapropylammonium hydroxide (TPAH) was studied as an electrolyte additive for aqueous Zn//ZnCl2 + LiCl//LiFePO4 battery. TPAH additive prolongs the battery cycle life depending on its concentration (0.01–0.1 M). The better capacity retention over 350 cycles was observed for a symmetrical Zn//ZnCl2 + LiCl//Zn cell with 0.05 M TPAH whereas without additives the cell worked for only 110 cycles. The mechanism of TPAH influence on capacity retention is proposed based on the results of SEM and XRD analysis of the Zn anode and FTIR and NMR studies of the electrolyte. The XRD patterns of the negative electrode of the cell with TPAH indicates that zinc was preferentially deposited in a highly oriented (002) direction, which is more resistant against dendrite formation. These differences in deposited structure of Zn dendrites were confirmed by SEM images as well. FTIR and NMR spectra showed that TPAH decomposes to propylamine (RnN+H) and propene during cycling. TPAH also has an effect on the size and uniform distribution of Zn growth sides.

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Influence of synthesis conditions over simonkolleite/ZnO precipitation

Cited by 24 publications

References 21 publications

Influence of High Chloride Concentration on pH Control in Hydroxide Precipitation of Heavy Metals

Influence of High Chloride Concentration on pH Control in Hydroxide Precipitation of Heavy Metals

Oxidative ionothermal synthesis for micro and macro Zn-based materials

Tetrapropylammonium Hydroxide as a Zinc Dendrite Growth Suppressor for Rechargeable Aqueous Battery

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