Synthesis of porous silica from wasted SiO2-containing molding compounds

Luo Yun Lai, Chi Cheng Chang, Yi Lun Hung, Tzu Hsing Chiang, Hong Ping Lin, Chun-Han Hsu

研究成果: Article同行評審

摘要

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 m2g−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 CO2 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.

原文English
頁(從 - 到)2206-2211
頁數6
期刊Journal of the Chinese Chemical Society
70
發行號12
DOIs
出版狀態Published - 2023 12月

All Science Journal Classification (ASJC) codes

  • 一般化學

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