Citation: XU Wei-Wei, DU Ai, TANG Jun, CHEN Ke, ZOU Li-Ping, ZHANG Zhi-Hua, SHEN Jun, ZHOU Bin. Rapid Preparation of Highly Doped CuO/SiO₂ Composite Aerogels[J]. Acta Physico-Chimica Sinica doi: 10.3866/PKU.WHXB201209282 shu

Rapid Preparation of Highly Doped CuO/SiO₂ Composite Aerogels

1.
Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, Physics Department, Tongji University, Shanghai 200092, P. R. China

Received Date: 23 July 2012
Available Online: 28 September 2012
Fund Project: 国家自然科学基金(51102184, 51172163) (51102184, 51172163) 国家高技术研究发展计划(863) (863) 国家科技支撑计划(2009BAC62B02) (2009BAC62B02) 同济大学青年优秀人才培养行动计划(2010KJ068) (2010KJ068)教育部博士点基金(20090072110047, 20100072110054)资助项目 (20090072110047, 20100072110054)

Highly doped CuO/SiO₂ composite aerogels were prepared via a propylene oxide pre-reaction method with acetonitrile as solvent. In a typical synthesis process, tetramethoxysilane (TMOS), acetonitrile, deionized water, and propylene oxide were mixed together for pre-reaction. The solutions were then mixed with a CuCl2 acetonitrile-water solution, with added propylene oxide. The mixed solutions were transformed to the wet gels after being kept in the oven for 0.5 h at 35℃. The dark monolithic CuO/SiO₂ composite aerogels were obtained after drying with supercritical CO₂ and following thermal treatment. The density, specific surface area, average doping concentration, and compression modulus of the final aerogel samples were about 180 mg·cm^-3, 625 m²·g^-1, 19.91%± 2.42% (Cu:Si molar ratio), and 1.639 MPa, respectively. The aerogels, which were ideal materials for backlight targets, featured od formability and uniform dispersion. The gelation mechanism was also discussed by comparing our typical synthetic process with reference experiments. The results demonstrated that the reaction rates of the two precursors were balanced by changing the solvent and using the propylene oxide pre-reaction method, which realized the co-gelation. In addition, the method may inspire new synthetic ideas for preparation of other metal-oxide/silica composite aerogels.
- Pre-reaction,
- Highly doping,
- Copper oxide,
- Composite aerogel,
- Propylene oxide,
- Co-gelation
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沈阳化工大学材料科学与工程学院沈阳 110142

Rapid Preparation of Highly Doped CuO/SiO2 Composite Aerogels

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Rapid Preparation of Highly Doped CuO/SiO₂ Composite Aerogels