【摘要】 通过扫描电子显微镜(SEM)系统地研究了竹炭的微观结构,并以竹炭孔道为模板,以正硅酸乙酯为硅源,采用溶胶-凝胶法合成出高度有序的二氧化硅微米线组,其形貌和组成分别通过SEM,EDX和XRD进行表征.结果表明,所得微米线为较纯的方石英晶型,直径约1～2μm,长达200μm以上,呈束状高度有序排列,其形貌高度复制了竹炭微孔孔道的结构,说明微孔在限域反应中起模板作用.更多还原

【Abstract】 The microstructrue of bamboo charcoal was studied through SEM and highly ordered SiO₂ microwires array were synthesized by using sol-gel method with TEOS as the Si resource and bamboo charcoal as the template. SEM, EDX and XRD techniques were used to characterize the products. The results show that the products were highly pure cristobalite SiO₂ microwires with the diameter of 1-2 μm and length over 200 μm, which copied to the structure of micropore precisely. It shows that the micropores of the bamboo charcoal may perform main template function.更多还原