TiO_2溶胶改性竹炭的高温活化研究

High-Temperature Activation of TiO_2 Sol Modified Bamboo Charcoal

采用溶胶-凝胶法制备的纳米TiO2对竹炭进行改性,并对改性前后竹炭进行高温活化,分析溶胶改性及高温活化对竹炭比表面积、物相及显微结构、光催化特性的影响机制。结果表明:溶胶改性及高温活化使竹炭的比表面积急剧增大,竹炭颗粒表面和细胞壁上存在锐钛矿型和金红石型共存的TiO2粒子,防止结构塌陷,并赋予竹炭优越的光催化性能。

The bamboo charcoal was modified by TiO2 sol synthesized by sol-gel process and its high-temperature activation was carried out. The effect of high-temperature activation on the specific surface area, microstructure and photocatalysis activity of bamboo charcoal were investigated. The results show that after TiO2 sol modification and high-temperature activation, the specific surface area of bamboo charcoal increased sharply, and anatase and rutile co-existing TiO2 particles enriched on the surface of bamboo charcoal or its cell wall, which prevented the structure collapse and endowed the photocatalysis activity of bamboo charcoal. It is advantageous to the production of bamboo charcoal and development of new materials with bamboo charcoal as starting materials.