Enhanced methanol gas-sensing performance of Ce-doped In2O3 porous nanospheres prepared by hydrothermal method
Enhanced methanol gas-sensing performance of Ce-doped In2O3 porous nanospheres prepared by hydrothermal method
复制标题
水热法制备Ce掺杂In2O3多孔纳米球增强甲醇气敏性能
DOI：
10.1016/j.snb.2015.04.083
复制
发表时间：
2015-09-01
影响因子：
8.4
通讯作者：
Wang, Qi
中科院分区：
文献类型：
--
作者：
Han, Dan;Song, Peng;Wang, Qi
本论文采用无模板水热法制备了Ce掺杂的In 2 O3多孔纳米球。采用X射线衍射（XRD）、电感耦合等离子体原子发射光谱（ICP-AES）、X射线光电子能谱（XPS）、场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）对样品的形貌和结构进行表征。FESEM和TEM结果表明，所制备的In 2 O3样品为均匀、分散性好的纳米微球，大小为200-300 nm，由大量细小的纳米晶组成。通过XRD、ICP和XPS等测试手段对产物进行了表征，光谱中的峰位移证实了Ce元素掺杂在立方相In 2 O3中。与纯In 2 O3样品相比，Ce掺杂的In 2 O3多孔纳米球在320 ℃的工作温度下对甲醇表现出优异的传感性能，并且具有约35.2-100 ppm甲醇的响应，这远高于基于纯In 2 O3纳米球的传感器。此外，Ce掺杂的In 2 O3多孔纳米球具有良好的选择性和长期稳定性。(C)2015 Elsevier B. V.版权所有。
In this work, novel Ce-doped In2O3 porous nanospheres have been prepared by calcining precursors obtained via a facile template-free hydrothermal method. The morphology and structure of the as-prepared samples were characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). FESEM and TEM images showed that as-prepared In2O3 samples were uniform and well-dispersed nanospheres with size of 200-300 nm, which were composed of numerous small nanocrystallites. XRD, ICP, and XPS spectroscopy were used to identify the products structure and the peak shifts in spectroscopies confirmed that the Ce element was doped in cubic In2O3. Compared with pure In2O3 samples, Ce-doped In2O3 porous nanospheres showed excellent sensing performance toward methanol at the operating temperature of 320 degrees C and had a response of about 35.2-100 ppm methanol, which was much higher than that of the sensor based on pure In2O3 nanospheres. In addition, Ce-doped In2O3 porous nanospheres exhibited good selectivity and long-term stability. (C) 2015 Elsevier B.V. All rights reserved.