Formation of 1D Hierarchical Structures Composed of Ni3S2 Nanosheets on CNTs Backbone for Supercapacitors and Photocatalytic H2 Production
Formation of 1D Hierarchical Structures Composed of Ni3S2 Nanosheets on CNTs Backbone for Supercapacitors and Photocatalytic H2 Production
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DOI：
10.1002/aenm.201200269
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发表时间：
2012-12
影响因子：
27.8
通讯作者：
Ting Zhu;H. Wu;Yabo Wang;R. Xu;X. Lou
中科院分区：
文献类型：
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作者：
Ting Zhu;H. Wu;Yabo Wang;R. Xu;X. Lou
通过合理的多步转化路线制备了由生长在碳纳米管（CNT）骨架上的Ni 3S 2纳米片（表示为CNT@Ni3S2）组成的一维（1D）分级结构。第一步涉及用二氧化硅层涂覆CNT主链以形成CNT@SiO2，其在第二步中用作硅酸镍（NiSilicate）纳米片生长的基底以形成CNT@SiO2@NiSilicate核-双壳1D结构。最后，通过在Na 2S存在下的水热处理，将所形成的CNT@SiO2@NiSilicate 1D结构转化为CNT负载的Ni 3S 2纳米片。同时，在水热处理过程中，中间二氧化硅层被消除，导致CNT@Ni3S2纳米结构的形成。由于独特的混合纳米结构，所制备的1D分级结构在超级电容器和光催化H2生产中表现出优异的性能。
One‐dimensional (1D) hierarchical structures composed of Ni3S2 nanosheets grown on carbon nanotube (CNT) backbone (denoted as CNT@Ni3S2) are fabricated by a rational multi‐step transformation route. The first step involves coating the CNT backbone with a layer of silica to form CNT@SiO2, which serves as the substrate for the growth of nickel silicate (NiSilicate) nanosheets in the second step to form CNT@SiO2@NiSilicate core‐double shell 1D structures. Finally the as‐formed CNT@SiO2@NiSilicate 1D structures are converted into CNT‐supported Ni3S2 nanosheets via hydrothermal treatment in the presence of Na2S. Simultaneously the intermediate silica layer is eliminated during the hydrothermal treatment, leading to the formation of CNT@Ni3S2 nanostructures. Because of the unique hybrid nano‐architecture, the as‐prepared 1D hierarchical structure is shown to exhibit excellent performance in both supercapacitors and photocatalytic H2 production.