title: Facile preparation of porous In2TiO5-rutile composite nanotubes by electrospinning and sensitivity enhancement in NO2 gas at room temperature.
abstract: Porous In2TiO5-rutile composite nanotubes (IRCNs) were synthesized via a facile one-step synthesis of the electrospinning approach by using tetrabutyl titanate (TBT), indium nitrate, and polyvinylpyrrolidone (PVP) as a soft-template followed by two-step calcination. The porous composite nanotubes with a bigger surface area have single-crystalline rutile with (110) crystal plane, and the sensor fabricated by it with a content of 12.5 at% In2TiO5 (IRCN2) has shown a response of 4.04 to 100 ppm NO2 at room temperature (RT), which was 20 times as high as the pure In2TiO5 sensor under the same conditions. The IRCN2 sensor had excellent selectivity compared with other gas species such as CO, H2, NH3, H2S and CH4 at RT. The enhanced sensing properties were attributed to the synergy of integrated In2TiO5 and rutile, heterojunction of single-crystal, and its nanotubular structure. Hence, the IRCN2 sensor has a potential application for the development of novel gas sensors at RT.
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China; College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, PR China.
authors.forename: Hongyuan
authors.initials: H
authors.lastname: Wu
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China.
authors.forename: Linlin
authors.initials: L
authors.lastname: Wang
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Gao
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China.
authors.forename: Guo
authors.initials: G
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China.
authors.forename: Shuang
authors.initials: S
authors.lastname: Xu
authors.affiliation: Department of Materials Chemistry, Nanchang Hangkong University, Nanchang 330063, PR China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China; Key Laboratory of Chemical Engineering Process & Technology for High-Efficiency Conversion, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China. Electronic address: llwjjhlju@sina.cn.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Key Laboratory of Physical Chemistry, School of Chemistry and Material Science, Heilongjiang University, Harbin 150080, PR China. Electronic address: shikeying2008@163.com.
authors.forename: Keying
authors.initials: K
authors.lastname: Shi
keywords: (110) Crystal plane; Electrospinning; Gas sensor; Hetero-junction of single-crystal and nanotubular structure; Sensitivity; Stability; Synergy of integrated In(2)TiO(5) and rutile