A Wide Range Conductometric pH Sensor Made With Titanium Dioxide/Multiwall Carbon Nanotube/Cellulose Hybrid Nanocomposite

被引：31
作者：
Chen, Yi [1 ]
Mun, Seong Cheol [1 ]
Kim, Jaehwan [1 ]
机构：
[1] Inha Univ, Dept Mech Engn, Inchon 402751, South Korea
来源：
IEEE SENSORS JOURNAL | 2013年 / 13卷 / 11期
基金：
新加坡国家研究基金会;
关键词：
pH sensor; hybrid nanocomposite; multi wall carbon nanotubes; titanium dioxide; cellulose; NANOTUBE; FILMS; CELLULOSE; BIOSENSOR; ACID;
D O I：
10.1109/JSEN.2013.2261812
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We report the fabrication and characterization of a pH sensor made with titanium dioxide (TiO2)/multiwall carbon nanotube (MWCNT)/cellulose hybrid nanocomposite. The TiO2-coated MWCNTs are synthesized by hydrothermal process. The X-ray diffraction and Raman spectra observations show that high anatase crystalline TiO2 nanoparticles are well formed on the surface of MWCNTs. After blending the TiO2/MWCNTs with cellulose solution, the TiO/MWCNT/cellulose hybrid nanocomposite is made and used for the pH sensor. This nanocomposite pH sensor exhibits two linear regions in its conductance between pH 1 and 12. Large surface area of the hybrid nanocomposite increases adsorption sites of ions so as to increase the pH sensitivity as well as sensing range. The long-term stability test and reusable test demonstrate that this hybrid nanocomposite pH sensor is useful for many practical applications. The pH sensing mechanism of this hybrid nanocomposite pH sensor is also discussed in this paper.
引用
收藏
页码：4157 / 4162
页数：6
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