Design of superhydrophobic surfaces by synthesis of carbon nanotubes over Co-Mo nanocatalysts deposited under microwave irradiation on Ti-containing mesoporous silica thin films.
Design of superhydrophobic surfaces by synthesis of carbon nanotubes over Co-Mo nanocatalysts deposited under microwave irradiation on Ti-containing mesoporous silica thin films.
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DOI：
10.1039/c0cp02215b
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发表时间：
2011-03
期刊：
影响因子：
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通讯作者：
Yu Horiuchi;Y. Shimizu;T. Kamegawa;K. Mori;H. Yamashita
中科院分区：
文献类型：
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作者：
Yu Horiuchi;Y. Shimizu;T. Kamegawa;K. Mori;H. Yamashita
通过Co-Mo二元纳米催化剂在含钛介孔二氧化硅薄膜（Ti-MSTF）上合成碳纳米管（CNT）来设计超疏水表面。在微波辐射下成功地将Co-Mo催化剂沉积在Ti-MSTFs上。CNT合成后的SEM和TEM观察显示，Ti-MSTF的表面被直径为15 nm的CNT致密地覆盖。拉曼光谱表明，合成的碳纳米管的碳网络中的不希望的结构缺陷，这将导致羟基的形成，是罕见的。有趣的是，CNT合成后的样品的疏水性能随着Ti-MSTF的钛浓度的增加而增强，并且在钛浓度为10at%的Ti-MSTF上的水接触角达到165°。分散在二氧化硅框架内的氧化钛部分和微波辐射的组合作出了很大的贡献，存款的活性钴钼催化剂负责形成致密的碳纳米管。
The superhydrophobic surface has been designed by the synthesis of carbon nanotubes (CNTs) on Ti-containing mesoporous silica thin films (Ti-MSTFs) with Co-Mo binary nanocatalysts. The active Co-Mo catalysts have been successfully deposited on Ti-MSTFs under microwave irradiation. SEM and TEM observations after CNT synthesis revealed that surfaces of Ti-MSTFs were densely covered with CNTs having a diameter of 15 nm. Raman spectra indicated that the undesired structural defects in the carbon network of the synthesized CNTs, which would lead to the formation of hydroxyl groups, were scarce. Interestingly, hydrophobic properties of samples after CNT synthesis were enhanced with increasing titanium concentration of Ti-MSTF, and the water contact angle reached up to 165° on Ti-MSTF with a titanium concentration of 10 at%. The combination of dispersed titanium oxide moieties within the silica frameworks and the microwave irradiation made a great contribution to deposit active Co-Mo catalysts responsible for the formation of well-dense CNTs.