以锯齿状碳纳米管为模板原位合成微/纳米球状氧化钨（英文）

In situ Synthesis of Nano-WO_3 Particles Attached to Spherelike Micro-WO_3 Using Jagged CNTs as Template

以锯齿状CNTs管束作为模板担载H_2WO_4前驱体。在液相沉积过程中H_2WO_4被锯齿状CNTs包裹,所得H_2WO_4/CNTs团簇的平均尺寸为500 nm,由直径10～20 nm的H_2WO_4组成,比表面积和孔容分别为85.24 m^2·g^(-1)和0.2933 m^3·g^(-1)。将H_2WO_4/CNTs置于氧气气氛中进行热处理,除去CNTs后,得到了由纳米颗粒组成的WO_3微米球,比表面积和孔容分别为18.7 m^2·g^(-1)和0.2055 m^3·g^(-1)。结果表明,锯齿状CNTs对有效调节分层结构WO_3发挥重要作用,对制备微纳米结构材料具有广阔的应用前景。

The CNT bundles can be jagged and used as a template to load the precursor H2WO4.The H2WO4 seeds can be enclosed by the jagged CNT template during liquid precipitation.The H2WO4 clusters with an average size of 500 nm consist of nanosized H2WO4with 10-20 nm in diameter,which display a high specific surface area of 85.24 m2·g^-1 and a total pore volume of 0.2933 m3·g^-1 After thermal treating of H2WO4/CNTs under an oxygen atmosphere,nano-WO3 particles attached to the sphere-like micro-WO3 can be easily obtained by removing the CNT template.Its specific surface area and total pore volume are 18.7 m2·g^-1 and 0.2055 m3·g^-1,respectively.These results indicate that the jagged CNTs can play an important role for effective mediating WO3 with a hierarchical size,and exhibit,excellent prospects for preparing micro-nanostructured materials.