论文部分内容阅读
高温自生压力法(RAPET)是一种新型、简单而又高效的无机材料制备方法。以含水天然产物如甘薯、香菜和野藤等为前驱物,经冷冻干燥其骨架结构得以维持,然后通过RAPET法在700℃碳化,制得了保持天然物原有微观骨架结构的碳材料;以液态油脂花生油为原料,经RAPET法直接制得微米碳球;粘胶纤维和脱脂棉经RAPET碳化后能维持其原有纤维形貌;用钛酸丁酯(TBOT)和正硅酸四乙酯(TEOS)浸渍的脱脂棉和粘胶纤维,经RAPET法一步合成了C/TiO2和C/SiO2复合材料。利用扫描电子显微镜(SEM)观察了产物的形貌,以比表面积及孔径分布测试仪对产物的比表面积和孔结构进行了表征,通过X射线衍射(XRD)研究了所得C/TiO2和C/SiO2复合材料的晶相特征。结果显示,所得产物比表面积从4m2/g到405m2/g不等,C/TiO2中TiO2晶相为锐钛矿型。
RAPET is a new, simple and efficient method of preparing inorganic materials. The structure of the skeleton was preserved by freeze-drying with water-containing natural products such as sweet potato, coriander and wild vines as raw materials, and then carbonized by RAPET method at 700 ℃ to obtain a carbon material that maintains the original micro-framework of natural materials. Oil peanut oil as raw material, the RAPET method directly obtained micron carbon balls; viscose fiber and cotton by RAPET carbonation to maintain its original fiber morphology; with TBOT and TEOS (tetraethyl orthosilicate) Impregnated absorbent cotton and viscose fiber, the C / TiO2 and C / SiO2 composites were synthesized by RAPET. The morphology of the product was observed by scanning electron microscopy (SEM). The specific surface area and pore size distribution of the product were characterized by specific surface area and pore size distribution analyzer. The obtained C / TiO2 and C / TiO2 were characterized by X-ray diffraction (XRD) SiO2 composite material. The results showed that the specific surface area of the product ranged from 4m2 / g to 405m2 / g. The TiO2 crystal phase in C / TiO2 was anatase.