脱合金制备纳米多孔<strong>Co</strong>及其超级电容器和对偶氮染料的降解性能

doi:10.11901/1005.3093.2020.443

材料研究学报

2020, Vol. 34

Issue (12): 905-914 DOI: 10.11901/1005.3093.2020.443

研究论文

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脱合金制备纳米多孔Co及其超级电容器和对偶氮染料的降解性能

陈峰, 周洋, 陈彦南, 林宗领, 秦凤香(

)

南京理工大学材料科学与工程学院南京 210094

Fabrication of Nano-porous Co by Dealloying for Supercapacitor and Azo-dye Degradation

CHEN Feng, ZHOU Yang, CHEN Yannan, LIN Zongling, QIN Fengxiang(

)

School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

引用本文:

陈峰, 周洋, 陈彦南, 林宗领, 秦凤香. 脱合金制备纳米多孔Co及其超级电容器和对偶氮染料的降解性能[J]. 材料研究学报, 2020, 34(12): 905-914.
Feng CHEN, Yang ZHOU, Yannan CHEN, Zongling LIN, Fengxiang QIN. Fabrication of Nano-porous Co by Dealloying for Supercapacitor and Azo-dye Degradation[J]. Chinese Journal of Materials Research, 2020, 34(12): 905-914.

全文: PDF(7049 KB) HTML

摘要:

在0.5%(质量分数,下同)NH₄F和1 mol/L (NH₄)₂SO₄混合溶液中进行电化学脱合金Zr₅₆Al₁₆Co₂₈非晶合金，制备出纳米多孔Co。这种纳米多孔Co具有良好的超级电容器性能，其比电容在2 A/g的电流密度下能达318 F/g；同时，纳米多孔Co在方波电位下对直接蓝6和酸性橙II等偶氮染料具有优异的降解能力，降解效率均高于96%，其单位质量纳米多孔Co电极材料的降解能力是等质量Zr₅₆Al₁₆Co₂₈非晶合金的3.5倍。

关键词 ：金属材料, 纳米多孔钴, 脱合金, 超级电容器, 降解

Abstract：

Nano-porous Co was prepared by electrochemically dealloying of Zr₅₆Al₁₆Co₂₈ amorphous alloy in 0.5%(mass fraction) NH₄F and 1 mol/L (NH₄)₂SO₄ mixed solution. Nano-porous Co has the bicontinuous porous structure with large specific surface area and fast charge transfer ability. The prepared nano-porous Co exhibits good performance in many aspects: firstly, it delivers a high specific capacitance of 318 F/g at 2 A/g, suggesting its good performance as supercapacitor electrode; secondly, it exhibits degradation efficiencies under square wave potential as high as 96% for Direct Blue 6 and Acid Orange II respectively. The degradation ability of nano-porous Co electrode per unit mass is 3.5 times higher than that of Zr₅₆Al₁₆Co₂₈ amorphous alloy electrode.

Key words： metallic materials nanoporous Co dealloying supercapacitor degradation

收稿日期: 2020-10-23

ZTFLH:

TG430.40

基金资助:国家自然科学基金(51671106);江苏省自然科学基金(BK20171424)

作者简介: 陈峰，男，1994年生，博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2020.443 或 https://www.cjmr.org/CN/Y2020/V34/I12/905

图1 Zr56Al16Co28合金的XRD谱图和在0.5% NH4F+1 mol/L (NH4)2SO4混合溶液中的极化曲线

图2 Zr56Al16Co28非晶合金脱合金后的形貌SEM图、孔径分布图和相应的EDS谱图

图3 纳米多孔Co的TEM图和选区电子衍射

图4 纳米多孔Co的Zr 3d、Al 2p、Co 2p和O 1s的XPS谱图

图5 纳米多孔Co的CV曲线、GCD曲线、比电容值和电化学阻抗谱图，插图为高频区

图6 经纳米多孔Co在不同方波电位下催化降解后在DB6和AOII溶液中的紫外吸收光谱和降解效率

图7 经纳米多孔Co不同周期催化降解后DB6和AOII溶液的紫外吸收光谱及对应的降解效率

图8 纳米多孔Co和Zr56Al16Co28非晶合金分别在DB6和AOII溶液中的方波电位图以及DB6和AOII的褪色效果

图9 纳米多孔Co、Zr56Al16Co28非晶合金催化降解DB6和AOII的紫外吸收光谱

图10 DB6和AOII溶液中降解产物的Zr 3d、Al 2p、 Co 2p、Na 1s、S 2p和O 1s的XPS谱

表1 纳米多孔Co与Zr56Al16Co28非晶合金电极降解DB6和AOII溶液的降解效率及降解因子

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