Preparation and characterisation of chemical manganese dioxide: Effect of the operating conditions

Pagnanelli, Francesca; Sambenedetto, C.; Furlani, G.; Vegliò, Francesco; Toro, Luigi

doi:10.1016/j.jpowsour.2007.01.066

Cited by 55 publications

(33 citation statements)

References 26 publications

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“…This can be attributed to maintaining the amount of electroactive material on the electrode surface confirming the explication given by Pagnanelli et al [9]. DOI Capacity values (mAh/cm 2 ) have been evaluated using a similar method as Pagnanelli et al [9]. The specific values calculated from the first cycle for each material were 0.03 mAh /cm 2 for S1, 0.6 mAh /cm 2 for S2, showing a higher performance of the S2 material in comparison with the commercial ones.…”

Section: Figsupporting

confidence: 86%

“…For S2, form of the curves is preserved, only registering an increase of current with increasing number of cycles. This can be attributed to maintaining the amount of electroactive material on the electrode surface confirming the explication given by Pagnanelli et al [9]. DOI Capacity values (mAh/cm 2 ) have been evaluated using a similar method as Pagnanelli et al [9].…”

Section: Figsupporting

confidence: 77%

“…Electrochemical activity of manganese oxides can be assessed by voltammetry which can provide additional information for material characterization from the shape, the number and the position of the different peak resembling the redox processes [9]. The samples obtained from chemical oxidation, and used in these experiments, were the precipitates obtained for sample 4 (S1) and 8 (S2) and kept in the furnace at 800 °C (see Table 1).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

“…Usually, Zn is recovered from spent batteries leach solutions by electrolysis, but the excessive manganese concentration can cause problems. A major area of research is based on the MnO 2 production (using methods as soon chemical, sol -gel, electrodeposition and hydrothermalmethod) and improvement of its electrochemical performance [5][6][7][8][9]. MnO 2 is economic and commercial important with applications in different fields such as battery industry, water treatment plants, steel industry and chemicals [9].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Manganese Recovering From Alkaline Spent Batteries by Ammonium Peroxodisulfate

Macolino¹,

Manci²,

Michelis³

et al. 2013

Acta Metall Slovaca

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The process of manganese removal from spent battery leaching solutions, with ammonium peroxodisulfate, prior to recovery of zinc by electrolysis is presented. The experiments were carried out according to a 2 3 full factorial design considering ammonium peroxodisulfate concentration, temperature and pH as factors investigated. The analysis of variance (ANOVA) was carried out on the precipitation yields of Mn and Zn after 30 min, 1h, 2h and 3h of reaction. Optimal conditions for obtaining Mn as MnO 2 have been 20 % (NH 4 ) 2 S 2 O 8 , 90 °C and pH 6. Data from XRF and AAS during the reaction at different time are presented to analyse the kinetic behaviour of the system. The MnO 2 precipitated and solutions were characterized by XRF and XRD. The solid samples were kept at 800 °C for 1 h to produce chemical manganese dioxide (CMD) and were characterized by cyclic voltammetry for their electrochemical activity. The overall results denoted that chemical oxidation of manganese from spent batteries leaching solutions with ammonium peroxodisulfate is a suitable method for manganese recovery as MnO 2 prior zinc recovery by electrolysis, also to produce of a suitable product (CMD), in other words, it could be used in a process for recycling spent batteries.

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Section: Figsupporting

confidence: 86%

Section: Figsupporting

confidence: 77%

Section: Electrochemical Characterizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Manganese Recovering From Alkaline Spent Batteries by Ammonium Peroxodisulfate

Macolino¹,

Manci²,

Michelis³

et al. 2013

Acta Metall Slovaca

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“…(15) O dióxido de manganês destinado à fabricação de pilhas deve apresentar alto grau de pureza e grande atividade eletroquímica. Segundo Pagnanelli et al (16) , os dióxidos de manganês mais importantes do ponto de vista comercial são aqueles que são ativos eletroquimicamente e, portanto, utilizados em células de pilhas secas.…”

Section: Introductionunclassified

Reciclagem de pilhas: recuperação do manganês na forma do dióxido de manganês eletrolítico.

Roriz¹

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Simultaneous Removal of Antibiotics and Heavy Metals with Poly(Aspartic Acid)‐Based Fenton Micromotors

Ding

Liu

Xiao

et al. 2021

Chemistry An Asian Journal

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The discharge of diverse pollutants has led to a complex water environment and posed a huge health threat to humans and animals. Self-propelled micromotors have recently attracted considerable attention for efficient water remediation due to their strong localized mass transfer effect. However, a single functionalized component is difficult to tackle with multiple contaminants and requires to combine different decontamination effects together. Here, we introduced a multifunctional micromotor to implement the adsorption and degradation roles simultaneously by integrating the poly(aspartic acid) (PASP) adsorbent with a MnO 2based catalyst. The as-prepared micromotors are well propelled in contaminated waters by MnO 2 catalyzing hydrogen peroxide. In addition, the catalytic ramsdellite MnO 2 (R-MnO 2 ) inner layer is decorated with Fe 2 O 3 nanoparticles to improve their catalytic performance, contributing to an excellent degradation ability with 90% tetracycline (TC) removal in 50 minutes by enhanced Fenton-like reactions. Combining the attractive adsorption capability of poly (aspartic acid) (PASP), the composite micromotors offer an efficient removal of heavy metal ions in short time. Moreover, the designed micromotors are able to simultaneously remove antibiotic and heavy metals in mixed contaminants circumstance just in single treatment. This multifunctional micromotor with distinctive decontamination ability exhibits a promising prospective in treating multiple pollutants in the future.

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Preparation and characterisation of chemical manganese dioxide: Effect of the operating conditions

Cited by 55 publications

References 26 publications

Manganese Recovering From Alkaline Spent Batteries by Ammonium Peroxodisulfate

Manganese Recovering From Alkaline Spent Batteries by Ammonium Peroxodisulfate

Reciclagem de pilhas: recuperação do manganês na forma do dióxido de manganês eletrolítico.

Simultaneous Removal of Antibiotics and Heavy Metals with Poly(Aspartic Acid)‐Based Fenton Micromotors

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