Hierarchical one-dimensional (1D) hollow nanostructures have attracted intense research attention due to their unique structures that may be capable of many promising applications. Here, we report a facile and effective strategy to prepare nickel silicate nanotubes (NiSNTs). Using this approach, mesoporous SiO₂ nanorods served as sacrificial templates for a simple hydrothermal process to prepare NiSNTs via a self-template route. The obtained NiSNTs preserve the tubular hierarchical morphology and hollow interior structures, which confer the NiSNTs with high surface areas and large pore volumes. These features point to NiSNTs as superior candidates for efficiently adsorbing heavy metal ions and organic dyes in wastewater. Moreover, NiSNTs can also serve as both supports and nickel sources, forming nickel silicate/nickel nanocomposite tubes (NiSNTs/Ni) via in situ reduction of NiSNTs under hydrothermal conditions. The addition of nickel precursors and surface pre-activation are therefore unnecessary. The NiSNTs/Ni exhibit efficient and recyclable catalytic properties when used for the reduction of 4-nitrophenol (4-NP). With a rational adaption, we believe this synthetic strategy can be extended to fabricate multifunctional one-dimensional hollow nanostructures with diverse compositions and morphologies, which may be useful for environmental protection, catalysis, energy and many other important domains.

分层的一维（1D）空心纳米结构因其独特的结构而备受广泛的研究，这些结构可能具有广阔的应用前景。在这里，我们报告了一种简便有效的策略来制备硅酸镍纳米管（NiSNTs）。使用这种方法，介孔SiO ₂纳米棒用作通过自模板途径制备NiSNT的简单水热过程的牺牲模板。所获得的NiSNT保留了管状的分层形态和中空的内部结构，这赋予了NiSNT具有高的表面积和大的孔体积。这些特征表明，NiSNTs是有效吸附废水中重金属离子和有机染料的优良候选者。此外，NiSNTs还可以用作载体和镍源，通过原位形成硅酸镍/镍纳米复合管（NiSNTs / Ni）在水热条件下还原NiSNTs。因此，不需要添加镍前体和表面预活化。当用于还原4-硝基苯酚（4-NP）时，NiSNT / Ni具有高效且可回收的催化性能。通过合理的调整，我们相信这种合成策略可以扩展到制造具有不同组成和形态的多功能一维中空纳米结构，这对于环境保护，催化，能源和许多其他重要领域可能是有用的。