【摘要】 在氢气与噻吩的催化还原气氛中,于400℃加热分解高能球磨后的前驱体(NH4)2WS4.用粉末X射线衍射(XRD),扫描电子显微镜(SEM),高分辨透射电子显微镜(HRTEM)和N2吸附比表面测定(BET)对反应产物进行了分析表征.结果表明反应产物是高纯度多壁的开口WS2纳米管,其平均长度为5μm,内径约为15nm,外径约为30nm,层间距为0.62nm.对于反应过程,提出了WS2纳米管"由内向外"的生长机理.更多还原

【Abstract】 The ballmilled (NH4)2WS4 precursor was heated to decompose in H2 and thiophene (C4H4S) atmosphere at 400 ℃. The instrumental analyses of powder Xray diffraction (XRD), scanning electron microscopy (SEM), highresolution transmission electron microscopy (HRTEM) and BrunauerEmmettTeller (BET) nitrogen sorption were used to characterize the products. The results show that highpurity multiwalled WS2 nanotubes with openended tips were achieved. The hollow WS2 nanotubes were 5 μm long with the inner diameter of approximately 15 nm, the outer diameter of about 30 nm, and the interlayer spacing of 0.62 nm. The insideout growth mechanism for obtaining WS2 nanotubes was proposed.更多还原