Morphology tuning of inorganic nanomaterials grown by precipitation through control of electrolytic dissociation and supersaturation
Morphology tuning of inorganic nanomaterials grown by precipitation through control of electrolytic dissociation and supersaturation
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通过控制电解离解和过饱和来调节沉淀生长的无机纳米材料的形态
DOI：
10.1038/s41557-019-0298-6
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发表时间：
2019-08-01
期刊：
影响因子：
21.8
通讯作者：
Dou, Shi-Xue
中科院分区：
文献类型：
--
作者：
Lai, Wei-Hong;Wang, Yun-Xiao;Dou, Shi-Xue
在无机材料合成过程中精确控制其形态非常重要，但也具有挑战性。在这里，我们报道了通过从金属阳离子溶液中快速沉淀而生长的各种无机材料的形态，可以在其结晶过程中从一维到三维（1D 到 3D）结构进行调整，而无需封端剂或模板。这种控制是通过调节反应物的电解离解 (α) 和溶液的过饱和度 (S) 之间的平衡来实现的。低α、弱电解质促进各向异性（1D 和 2D）样品的生长，其中 1D 材料在低 S 下尤其受到青睐。相比之下，各向同性 3D 多面体结构只能在低 S 的强电解质反应物（α 接近 1）存在下制备。利用这种策略，制备了多种材料，包括金属氧化物、氢氧化物、碳酸盐、钼酸盐、草酸盐、磷酸盐、氟化物和碘酸盐具有多种形态。
The precise control of the morphology of inorganic materials during their synthesis is important yet challenging. Here we report that the morphology of a wide range of inorganic materials, grown by rapid precipitation from a metal cation solution, can be tuned during their crystallization from one- to three-dimensional (1D to 3D) structures without the need for capping agents or templates. This control is achieved by adjusting the balance between the electrolytic dissociation (alpha) of the reactants and the supersaturation (S) of the solutions. Low-alpha, weak electrolytes promoted the growth of anisotropic (1D and 2D) samples, with 1D materials favoured in particular at low S. In contrast, isotropic 3D polyhedral structures could only be prepared in the presence of strong electrolyte reactants (alpha approximate to 1) with low S. Using this strategy, a wide range of materials were prepared, including metal oxides, hydroxides, carbonates, molybdates, oxalates, phosphates, fluorides and iodate with a variety of morphologies.