Liu Jian, Sun Yonghua, Yang Tianfeng
Zhejiang Fuli Analytical Instrument Co., Ltd., Wenling 317500, China.
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China.
Nanomaterials (Basel). 2025 Feb 20;15(5):326. doi: 10.3390/nano15050326.
Typical wet-chemical methods for the preparation of silica nanowires use polyvinylpyrrolidone and n-pentanol. This study presents a polyethylene glycol-based emulsion template method for the synthesis of SiO nanowires (SiONWs) in isopropanol. By systematically optimizing key parameters (type of solvent, polyethylene glycol molecular weight and dosage, dosage of sodium citrate, ammonium and tetraethyl orthosilicate, incubation temperature and time), SiONWs with diameters about 530 nm were obtained. Replacing polyvinylpyrrolidone with polyethylene glycol enabled anisotropic growth in isopropanol, overcoming the dependency on traditional solvents like n-pentanol. Scale-up experiments (10× volume) demonstrated robust reproducibility, yielding nanowires with consistent morphology (~580 nm diameter). After calcination at 500 °C for 1 h, the morphology of the nanowires did not change significantly.
用于制备二氧化硅纳米线的典型湿化学方法使用聚乙烯吡咯烷酮和正戊醇。本研究提出了一种基于聚乙二醇的乳液模板法，用于在异丙醇中合成SiO纳米线（SiONWs）。通过系统优化关键参数（溶剂类型、聚乙二醇分子量和用量、柠檬酸钠、铵和正硅酸四乙酯的用量、孵育温度和时间），获得了直径约530nm的SiONWs。用聚乙二醇替代聚乙烯吡咯烷酮可在异丙醇中实现各向异性生长，克服了对正戊醇等传统溶剂的依赖。放大实验（10倍体积）显示出强大的可重复性，得到了形态一致（直径约580nm）的纳米线。在500℃下煅烧1小时后，纳米线的形态没有明显变化。
