In Situ Growing Double-Layer TiO2 Nanorod Arrays on New-Type FTO Electrodes for Low-Concentration NH3 Detection at Room Temperature

被引：62

作者：

Zhao, Guodong ^{[1
]}

Xuan, Jingyue ^{[1
]}

Gong, Qianqian ^{[1
]}

Wang, Lili ^{[1
]}

Ren, Juanjuan ^{[1
]}

Sun, Meiling ^{[1
]}

Jia, Fuchao ^{[1
]}

Yin, Guangchao ^{[1
]}

Liu, Bo ^{[1
]}

机构：

[1] Shandong Univ Technol, Sch Phys & Optoelect Engn, Lab Funct Mol & Mat, Zibo 255000, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2020年 / 12卷 / 07期

基金：

中国国家自然科学基金;

关键词：

TiO2 nanorod arrays; etched fluorine-doped tin dioxide glass; in situ growth; NH3; detection; room temperature; GAS SENSOR; SENSING PROPERTIES; AMMONIA SENSOR; HIGH-PERFORMANCE; OXYGEN VACANCIES; FAST-RESPONSE; FABRICATION; NANOCOMPOSITE; NANOPARTICLES; COMPOSITE;

D O I：

10.1021/acsami.9b20337

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel double-layer TiO2 nanorod array (NRA) gas sensor for room-temperature detection of NH3 was fabricated by employing etched fluorine-doped tin dioxide (FTO) glass as the in situ growing substrate and the new-type gas-sensing electrode via the facile droplet-coating and hydrothermal methods. Due to the synergistic effect of forces, special double-layer TiO2 NRAs with a cross-linked and bridgelike structure is formed, in which adequate point junctions can be generated to construct self-assembled electron pathways required for gas-sensing tests. Gas sensing tests indicate that all samples obtained at different growth times have an excellent gas-sensing response to low-concentration NH3 at room temperature. Among them, the TiO2 NRAs obtained at 6 h (S2) exhibit the highest gas-sensing response to 100 ppm NH3 with a value of 102%. In addition, the growth mechanism, the gas reaction mechanism, and the effect of humidity on the gas sensing performance are also discussed in the present paper.

引用

页码：8573 / 8582

页数：10

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