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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 nano-TiO2 prepared by sol-gel method was used to modify bamboo charcoal, and the bamboo charcoal before and after modification was activated at high temperature. The effects of sol modification and high temperature activation on specific surface area, phase, microstructure and photocatalytic properties of bamboo charcoal were analyzed. mechanism. The results showed that the specific surface area of bamboo charcoal increased sharply after sol modification and high temperature activation. The coexistence of anatase and rutile TiO2 particles on the surface and the cell wall of bamboo charcoal particles prevented the structure from collapsing and gave the bamboo charcoal superior photocatalytic activity.