A scalable three-dimensional porous lambda-MnO2_rGO_Ca-alginate composite electroactive film with potential-responsive ion-pumping effect for selective recovery of lithium ions

doi:10.1016/j.seppur.2020.118111

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	A scalable three-dimensional porous lambda-MnO2_rGO_Ca-alginate composite electroactive film with potential-responsive ion-pumping effect for selective recovery of lithium ions
	Zhang, Zheng; Du, Xiao; Wang, Qiang; Gao, Fengfeng; Jin, Tongtong; Hao, Xiaogang; Ma, Pengfei; Li, Jun; Guan, Guoqing
刊名	SEPARATION AND PURIFICATION TECHNOLOGY
	2021-03-15
卷号	259
ISSN号	1383-5866
DOI	10.1016/j.seppur.2020.118111
英文摘要	A scalable three-dimensional (3D) porous composite electroactive film consisting of lambda-MnO2, reduced graphene oxide (rGO) and calcium alginate (Ca-alg) was successfully fabricated and employed for the selective extraction of Li(+ )ions with low concentration via an electrochemically switched ion exchange (ESIX) technology. The Li+ ion adsorption capacity of the obtained lambda-MnO2/rGO/Ca-alg composite electmactive film reached as high as 32.7 mg g(-1) and more than 90% of its equilibrium adsorption capacity was achieved in 1 h. The lambda-MnO2/rGO/Ca-alg composite electroactive film displayed evident selectivity towards Li+ ions. The separation factors for Li+/Na(+ )and Li+/M2+ reached 1040.57 and 358.96, respectively, while tested in simulated brine. The composite film also showed superior electrochemical stability, and the normalized ion exchange capacity retained at 98.3% of its initial value even after 100 successive cycles. The excellent Li+ ion recovery performance of the obtained composite film should be attributed to its low ion transfer resistance owing to the porous network structure and the potential-responsive ion-pumping effect in the ESIX process. In addition, a large-scale of such a composite electroactive film could be effectively fabricated by controlling the spreading area of the mixed solution consisting lambda-MnO2, rGO and alginate binder. It is expected that such a scalable 3D porous composite film could be a promising alternative for the recovery of lithium ions from salt lake brine.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34339]
专题	青海盐湖研究所_盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Zhang, Zheng,Du, Xiao,Wang, Qiang,et al. A scalable three-dimensional porous lambda-MnO2_rGO_Ca-alginate composite electroactive film with potential-responsive ion-pumping effect for selective recovery of lithium ions[J]. SEPARATION AND PURIFICATION TECHNOLOGY,2021,259.
APA	Zhang, Zheng.,Du, Xiao.,Wang, Qiang.,Gao, Fengfeng.,Jin, Tongtong.,...&Guan, Guoqing.(2021).A scalable three-dimensional porous lambda-MnO2_rGO_Ca-alginate composite electroactive film with potential-responsive ion-pumping effect for selective recovery of lithium ions.SEPARATION AND PURIFICATION TECHNOLOGY,259.
MLA	Zhang, Zheng,et al."A scalable three-dimensional porous lambda-MnO2_rGO_Ca-alginate composite electroactive film with potential-responsive ion-pumping effect for selective recovery of lithium ions".SEPARATION AND PURIFICATION TECHNOLOGY 259(2021).