硅酸钠
化学
PEG比率
聚乙二醇
多孔性
化学工程
硅胶
造型(装饰)
硅酸盐
钠
萃取(化学)
热液循环
比表面积
色谱法
有机化学
催化作用
复合材料
材料科学
财务
工程类
经济
作者
Lin Lai,Chi‐Cheng Chang,Yi‐Lun Hung,Tzu‐Hsing Chiang,Hong‐Ping Lin,Chun‐Han Hsu
标识
DOI:10.1002/jccs.202300340
摘要
Abstract Materials In this study, we provided a simple method to extract the silicate species from the waste silica‐containing molding compounds from the semiconducting industry. Methods Recycled sodium silicate solution was obtained from alkaline extraction of the silica fillers in the waste molding compounds and dried and redissolved in appropriate amount of water. Results Porous silica of high surface area (>500 m 2 g −1 ) and tunable pore size (1.5–5.0 nm) could be feasibly synthesized by using the recycled sodium silicate as silica source and nature‐friendly homopolymer polyethylene glycol (PEG) as an organic template. The pore size of the PEG‐templating silicas was made tunable by hydrothermal treatment at different pH. Conclusion To reduce the emission of CO 2 gas from the removal of the PEG template, porous silica with a large surface area has been prepared at a low PEG/sodium silicate weight ratio of 1/20.
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