水稻秸秆中硅体的光催化活性研究

采用干燥-灼烧-煅烧工艺从水稻秸秆中制备硅体,并对硅体进行表征和光催化活性研究。结果表明,制备的硅体由无定形的微米、纳米二氧化硅颗粒组成,并具有光驱类脱氢酶活性和光催化降解甲基紫的能力。在模拟的光源下,在人工模拟的光源下,硅体催化红四氮唑(TTC)迅速转变成不溶于水的三苯甲簪(TPF),硅体的光驱类脱氢酶活力值达到2622μg TPF ·g-1 ·min-1;光催化降解甲基紫染料的结果表明硅体对甲基紫的去除率2 h内达到94.4%。秸秆中硅体的光催化特性为生物质资源的开发利用提供新途径,同时也对自然界中生物材料结构与功能的研究提供了新的思路。

PHOTOCATALYTIC ACTIVITY OF SILICA BODIES IN RICE STRAW

Silica bodies were prepared from rice straw using desiccation-ignition-calcination method, and the prepared silica bodies characterization and photocatalytic ability were studied. It was found that the silica bodies were composed of amorphous micro and nano silica particles, presented Light-driven Dehydrogenase-like Activity (LDA) and photocatalytic activity for the degradation of methyl violet. Triphenyltetrazolium chloride (TTC) was quickly catalysed to water-insoluble Triphenylformanzan (TPF) by silica bodies under the artificial sunlight, valve of the LDA was high up to 2622μg TPF ·g-1 ·min-1; The results of photocatalytic degradation of methyl violet showed that photocatalytic degradation rate of methyl violet could reach 94.4% in the present of silica bodies after 2h photocatalytic reaction. The study provides a new way for the development and utilization of biomass resources, meanwhile, offers new ideas to researches about the structure and function of biomaterial in natural.