Facile room temperature synthesis of size-controlled spherical silica from silicon metal via simple sonochemical process,Ultrasonics Sonochemistry

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Facile room temperature synthesis of size-controlled spherical silica from silicon metal via simple sonochemical process
Ultrasonics Sonochemistry ( IF 8.7 ) Pub Date : 2024-05-23 , DOI: 10.1016/j.ultsonch.2024.106913
Ren Zushi ₁ , Yamato Hayashi ₁ , Toshiki Yamanaka ₁ , Hirotsugu Takizawa ₁

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The waterglass or St ber method is commonly used to synthesize spherical colloidal silica; however, these methods have some disadvantages, such as complicated processes for the removal of sodium ions and expensive and energy-consuming raw materials such as tetraethoxysilane (TEOS). In this study, size-controlled spherical colloidal silica was synthesized from silicon metal at room temperature using an ultrasound process with hydrazine monohydrate as the solvent. Silicon metal dissolves easily in hydrazine monohydrate under ultrasound irradiation, and spherical colloidal silica can be synthesized by adding alcohol to this precursor solution. By changing the concentration or type of alcohol, size-controlled colloidal silica 20–200 nm in size could be easily obtained. In addition, finer and more monodisperse particles were produced by low-frequency ultrasound irradiation, which had a higher stirring effect at the particle formation stage. The present method is effective because size-controlled colloidal silica can be synthesized at room temperature using only silicon metal, hydrazine, and alcohol as raw materials, without complicated processes or expensive and energy-consuming raw materials such as TEOS or tetramethoxysilane (TMOS).

中文翻译：

通过简单的声化学过程从硅金属轻松室温合成尺寸受控的球形二氧化硅

合成球形胶体二氧化硅常用水玻璃法或Stber法；然而，这些方法存在一些缺点，例如去除钠离子的过程复杂以及昂贵且耗能的原材料，例如四乙氧基硅烷（TEOS）。在这项研究中，以一水合肼为溶剂，采用超声波工艺，在室温下由硅金属合成了尺寸受控的球形胶体二氧化硅。金属硅在超声波照射下容易溶解在一水合肼中，通过向该前体溶液中添加醇可以合成球形胶体二氧化硅。通过改变酒精的浓度或类型，可以很容易地获得尺寸控制在20-200 nm的胶体二氧化硅。此外，低频超声辐照产生的颗粒更细、更单分散，在颗粒形成阶段具有更高的搅拌效果。本方法是有效的，因为尺寸控制的胶体二氧化硅可以在室温下仅使用硅金属、肼和醇作为原料来合成，而不需要复杂的工艺或昂贵且消耗能源的原料，例如TEOS或四甲氧基硅烷(TMOS)。

更新日期：2024-05-23

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