【摘要】 以木材为模板的遗态转化工艺可以赋予材料精细的孔径结构,本文以桦木为模板,通过在不同温度下进行前驱体溶液浸渍和烧结,制备的多孔Ti O2氧化物,并对其光催化降解甲醛能力进行研究。结果表明:对桦木木材进行Na OH溶液抽提处理后,采用40℃水浴加热进行前驱体浸渍可获得较好的浸渍效果,桦木材的浸渍率可达到4.0%,该条件处理的浸渍桦木材在800℃的焙烧温度下烧结的氧化物得率达到8.09%。XRD检测分析显示所获得的烧结氧化物为金红石型的Ti O2;扫描电镜观测发现木材模板在40℃前驱体浸渍溶液中处理后进行800℃焙烧获得的Ti O2对木材模板微观结构有较好的保留。更多还原

【Abstract】 The morph-genetic transformation process based on wood template can provide the good pore structure of material. Birch was used as template to prepare porous TiO₂ oxide. The parameters of precursor solution impregnation and sintered temperature were studied to investigate their effects on formaldehyde degradation. The results showed that the wood templated impregnated 40 ℃ can obtain better impregnation rate and burning rate. XRD analysis was carried out to investigate the composition of TiO₂. SEM analysis showed that TiO₂ oxides well replicate the microstructure of wood template.更多还原