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首页> 外文期刊>Journal of nanomaterials >Morphological and structural studies of titanate and titania nanostructured materials obtained after heat treatments of hydrothermally produced layered titanate
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Morphological and structural studies of titanate and titania nanostructured materials obtained after heat treatments of hydrothermally produced layered titanate

机译：水热制备的层状钛酸酯热处理后获得的钛酸酯和二氧化钛纳米结构材料的形态和结构研究

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摘要

Different types of titanate and titania nanostructured materials have been successfully synthesised and characterized using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and raman spectroscopy. Elemental analysis was determined by energy dispersive X-ray spectroscopy (EDX) analyzer while thermogravimetric- differential scanning calorimetry (TG-DSC) was used to determine thermal stability. In this study, we found that nanotubes were formed during the washing treatment stage with HCl and distilled water. When the pH of the washing solution was 12, sodium titanate nanotubes were obtained, while when the pH of the washing solution was 7, hydrogen titanate nanotubes were obtained. Sodium titanate nanotubes were thermally stable up to 500°C; however, at 700°C, the nanotubes structure transform to solid nanorods. Meanwhile, hydrogen titanate nanotubes decomposed to produce titania nanotubes after heat treatment at 300°C for 2 hours. At 500°C, the tubular structure broke to small segments due to destruction of the nanotube. Further heat treatment at 700°C, led to the destruction and collapse of the nanotubes structure produce titania nanoparticles.
机译：使用场发射扫描电子显微镜（FESEM），透射电子显微镜（TEM），X射线衍射（XRD）和拉曼光谱已成功合成并表征了不同类型的钛酸酯和二氧化钛纳米结构材料。元素分析通过能量色散X射线光谱仪（EDX）分析仪确定，而热重差示扫描量热法（TG-DSC）用于确定热稳定性。在这项研究中，我们发现在用HCl和蒸馏水进行清洗处理的过程中形成了纳米管。当洗涤溶液的pH为12时，获得钛酸钠纳米管，而当洗涤溶液的pH为7时，获得钛酸氢纳米管。钛酸钠碳纳米管在高达500°C的温度下具有热稳定性;然而，在700℃下，纳米管结构转变为固体纳米棒。同时，在300℃下热处理2小时后，钛酸氢纳米管分解成二氧化钛纳米管。在500°C下，由于破坏了纳米管，管状结构破裂成小段。在700°C下进一步热处理，导致纳米管结构的破坏和塌陷，产生二氧化钛纳米颗粒。

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