Abstract In this work, nano-sized silica xerogel particles were synthesized using sodium silicate solution prepared from waste container glasses (of mix colors) as precursor. The as-received waste container glasses of different mix colors (green, white and amber) from municipal dumpsite were initially washed, crushed and wet milled for 24 h then sieved through 63 μm mesh. The sieved glass slurries were then oven dried at 110 °C for 72 h to obtain powdered glass (GP). Appropriate amount of GP was reacted with 320 ml of 3 M NaOH solutions respectively in a 500 ml Erlenmeyer flask placed on a hot plate connected with a reflux condenser and continuously stirred at 40 rpm with the aid of magnetic stirrer for a period of 3 h under reaction temperature of 200 °C. The resultant solution was filtered to obtain sodium silicate solutions (SSS). 3 M HCl was prepared and was gently added into the SSS whilst continuously stirred to obtain a white gelly-like mixture (at pH ˂10). The gelly mixture was left for 18 h (ageing), then filtered and dried in an electric oven at 80 °C for 12 h to obtain highly pure silica gel particles and then characterized. The results showed that the synthesized nano-sized silica particles range between 0.031 (31 nm) μm to 0.051 (51 nm) μm.

中文翻译：

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用废容器玻璃中提取的硅酸钠溶液制备纳米二氧化硅干凝胶颗粒并表征

摘要 在这项工作中，以废容器玻璃（混合颜色）制备的硅酸钠溶液为前驱体，合成了纳米尺寸的二氧化硅干凝胶颗粒。来自市政垃圾场的不同混合颜色（绿色、白色和琥珀色）的原样废物容器玻璃最初经过洗涤、粉碎和湿磨 24 小时，然后通过 63 μm 筛网筛分。然后将过筛的玻璃浆在 110°C 下烘干 72 小时以获得粉状玻璃 (GP)。将适量的GP分别与320ml 3M NaOH溶液在500ml锥形烧瓶中反应，该烧瓶置于与回流冷凝器相连的热板上，并在磁力搅拌器的帮助下以40rpm连续搅拌3小时。反应温度200℃。过滤所得溶液以获得硅酸钠溶液(SSS)。制备 3 M HCl 并将其轻轻加入 SSS 中，同时不断搅拌以获得白色凝胶状混合物（pH ˂10）。将凝胶状混合物放置 18 小时（老化），然后过滤并在 80°C 的电烘箱中干燥 12 小时以获得高纯度硅胶颗粒，然后进行表征。结果表明，合成的纳米二氧化硅颗粒范围在0.031（31 nm）μm至0.051（51 nm）μm之间。