Photocatalytic properties of Co/Co3O4 films recycled from spent Li-ion batteries

被引：9

作者：

Falqueto, J. B. ^{[1
]}

Magnago, L. B. ^{[2
]}

Rocha, A. K. S. ^{[2
]}

Pegoretti, V. C. B. ^{[2
]}

Dixini, P. V. M. ^{[3
]}

Celante, V. G. ^{[3
]}

Lelis, M. F. F. ^{[2
]}

Freitas, M. B. J. G. ^{[2
]}

机构：

[1] Univ Fed Sao Carlos, Dept Chem, Rod Washington Luis Km 235, BR-13565905 Sao Carlos, SP, Brazil

[2] Univ Fed Espirito Santo, Dept Chem, Lab Electrochem & Electroanalyt, Ave Fernando Ferrari 514, BR-29075910 Vitoria, ES, Brazil

[3] Fed Inst Educ Sci & Technol Espirito Santo, BR-29192733 Aracruz, ES, Brazil

来源：

IONICS | 2018年 / 24卷 / 07期

关键词：

Li-ion batteries; Catalyzes; Ionic conductivities; Thin films; Batteries; REACTIVE BLACK 5; CATHODES; RECOVERY; METALS; COBALT;

D O I：

10.1007/s11581-018-2614-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Cobalt recycled from spent Li-ion batteries has been used in the catalysis of azo dye. Metallic cobalt with a compact hexagonal structure was recycled by electrodeposition after leaching a solution of Li-ion battery cathode and applying a potential of - 1.1 V, with charge density = 15 C cm(-2) and pH = 2.7. This cobalt, with H2O2 0.27 mol L-1, was used for degradation of azo dye. H2O2 transformed Co in situ into Co3O4 with a spinel-type structure. Co3O4 was confirmed by Raman spectrum bands in the region of 450 and 700 cm(-1) (.) The kinetics of the degradation reactions are of first order. Discoloration efficiency of 85% was reached after 210 min under UV radiation. Formation of Co3O4 in situ is an innovative and efficient method to solve two problems: Li-ion battery recycling and azo dye discolorization.

引用

页码：2167 / 2173

页数：7

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