Institutional Repository of Coll Mat Sci & Engn
Gas sensitivity of heterojunction TiO2NT/GO materials prepared by a simple method with low-concentration acetone | |
Jiang, Lili1; Tu, Sihao1; Yu, Haitao2; Meng, Yimin1; Zhao, Yuanshou1; Hou, Xingang1 | |
2020-03 | |
发表期刊 | Ceramics International |
ISSN | 02728842 |
卷号 | 46期号:4页码:5344-5350 |
摘要 | Graphene oxide (GO) was prepared using a modified Hummers' method, and titanium dioxide nanotubes (TiO2NT) were prepared by a hydrothermal method. The gas sensing material (graphene oxide-titanium dioxide nanotubes) was obtained by self-assembling composite GO and TiO2NT.Then the material was coated onto a gold electrode to prepare the device. This resultant device exhibits excellent response to low concentrations of acetone and high selectivity over other gases. Through SEM test analysis, TiO2NT was tiled on a sheet of GO to form a physically bonded heterojunction semiconductor composite. XRD analysis confirms that the anatase TiO2 was successfully produced and there was no impurity peak in the composite. During the gas sensing test, it was proved that the device exhibited an excellent response to 0.3 ppm of acetone at 250 °C. The heterojunction material still exhibits the resistance characteristics of the n-type semiconductor, and the material resistance is reduced in a gas environment by carrier conduction. The increase of sensitivity arises from the fact that the holes of GO and the carriers of TiO2NT are moved towards each other to form a space charge region, which causes the material to form a larger resistance difference in the test gas environment. © 2019 Elsevier Ltd and Techna Group S.r.l. |
关键词 | Acetone Chemical detection Gas detectors Gases Gold coatings Graphene Graphene oxide Heterojunctions Impurities Magnetic semiconductors Nanotubes Oxide minerals Titanium dioxide Acetone gas sensors Gas sensing material Hydrothermal methods N-type semiconductors Resistance characteristics Semiconductor composite Space charge regions Titanium dioxide nanotubes |
DOI | 10.1016/j.ceramint.2019.10.288 |
收录类别 | SCI ; SCIE ; EI |
语种 | 英语 |
WOS研究方向 | Materials Science |
WOS类目 | Materials Science, Ceramics |
WOS记录号 | WOS:000512219600156 |
出版者 | Elsevier Ltd |
EI入藏号 | 20194807738961 |
EI主题词 | Gas sensing electrodes |
EI分类号 | 482.2 Minerals - 708.4 Magnetic Materials - 714.2 Semiconductor Devices and Integrated Circuits - 761 Nanotechnology - 801 Chemistry - 804 Chemical Products Generally - 813.2 Coating Materials - 914.1 Accidents and Accident Prevention - 951 Materials Science |
来源库 | Compendex |
分类代码 | 482.2 Minerals - 708.4 Magnetic Materials - 714.2 Semiconductor Devices and Integrated Circuits - 761 Nanotechnology - 801 Chemistry - 804 Chemical Products Generally - 813.2 Coating Materials - 914.1 Accidents and Accident Prevention - 951 Materials Science |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/115319 |
专题 | 材料科学与工程学院 |
通讯作者 | Jiang, Lili |
作者单位 | 1.Lanzhou Univ Technol, Sch Mat Sci & Technol, Langongping Rd, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ, Dept Med Lab, Hosp 1, 1 Donggang Rd, Lanzhou 730000, Gansu, Peoples R China |
第一作者单位 | 兰州理工大学 |
通讯作者单位 | 兰州理工大学 |
第一作者的第一单位 | 兰州理工大学 |
推荐引用方式 GB/T 7714 | Jiang, Lili,Tu, Sihao,Yu, Haitao,et al. Gas sensitivity of heterojunction TiO2NT/GO materials prepared by a simple method with low-concentration acetone[J]. Ceramics International,2020,46(4):5344-5350. |
APA | Jiang, Lili,Tu, Sihao,Yu, Haitao,Meng, Yimin,Zhao, Yuanshou,&Hou, Xingang.(2020).Gas sensitivity of heterojunction TiO2NT/GO materials prepared by a simple method with low-concentration acetone.Ceramics International,46(4),5344-5350. |
MLA | Jiang, Lili,et al."Gas sensitivity of heterojunction TiO2NT/GO materials prepared by a simple method with low-concentration acetone".Ceramics International 46.4(2020):5344-5350. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论