Electrical Response of the Spinel ZnAl2O4 and Its Application in the Detection of Propane Gas

被引：3

作者：

Guillen-Bonilla, Hector ^{[1
]}

Trinidad Guillen-Bonilla, Jose ^{[2
]}

Maria Rodriguez-Betancourtt, Veronica ^{[3
]}

Jimenez-Rodriguez, Maricela ^{[4
]}

Guillen-Bonilla, Alex ^{[5
]}

Huizar-Padilla, Emilio ^{[6
]}

Eugenia Sanchez-Morales, Maria ^{[7
]}

Alberto Ramirez-Ortega, Jorge ^{[1
]}

Blanco-Alonso, Oscar ^{[8
]}

机构：

[1] Univ Guadalajara UdeG, Ctr Univ Ciencias Exactas & Ingn CUCEI, Dept Ingn Proyectos, Blvd M Garcia Barragan 1421, Guadalajara 44410, Jalisco, Mexico

[2] Univ Guadalajara UdeG, Ctr Univ Ciencias Exactas & Ingn CUCEI, Dept Elect, Blvd M Garcia Barragan 1421, Guadalajara 44410, Jalisco, Mexico

[3] Univ Guadalajara UdeG, Ctr Univ Ciencias Exactas & Ingn CUCEI, Dept Quim, Blvd M Garcia Barragan 1421, Guadalajara 44410, Jalisco, Mexico

[4] Univ Guadalajara UdeG, Ctr Univ Cienega CUCienega, Div Desarrollos Biotecnol, Av Univ 1115, Ocotlan 47810, Jalisco, Mexico

[5] Univ Guadalajara UdeG, CUVALLES, Dept Ciencias Computac & Ingn, Carretera Guadalajara Ameca Km 45-5, Ameca 46600, Jalisco, Mexico

[6] Univ Colima, Fac Ciencias Quim, Colima 28400, Colima, Mexico

[7] Univ Guadalajara UdeG, Ctr Univ Cienega CUCienega, Dept Ciencias Tecnol, Av Univ 1115, Ocotlan 47810, Jalisco, Mexico

[8] Univ Guadalajara UdeG, Ctr Univ Ciencias Exactas & Ingn CUCEI, Dept Fis, Blvd M Garcia Barragan 1421, Guadalajara 44410, Jalisco, Mexico

来源：

APPLIED SCIENCES-BASEL | 2021年 / 11卷 / 20期

关键词：

gas sensors; oxide ZnAl2O4; nanoparticles; mathematical model of a sensor; dynamic behavior of a chemical sensor; propane gas detector; ZINC ALUMINATE; THIN-FILMS; SENSORS; OXIDE; SENSITIVITY; COMBUSTION; POWDERS;

D O I：

10.3390/app11209488

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nanoparticles of the semiconductor ZnAl2O4 were prepared using a microwave-assisted wet chemistry method in the presence of ethylenediamine and calcination at 250 & DEG;C. The material's crystallinity and purity were verified by X-ray diffraction. The pure phase of the ZnAl2O4 presented a cubic crystalline structure with cell parameters a = 8.087 & ANGS; and space group Fd-3m (227). Dynamic tests in propane atmospheres were carried out on pellets (~500 mu m in diameter) manufactured with ZnAl2O4 powders. In the tests, the oxide showed variations with time in electrical resistance when injecting air-propane at an operating temperature of 250 & DEG;C. The pellets showed good stability, high sensitivity, and an optimal dynamic response as a function of time. On the other hand, a mathematical model was proposed to describe the chemical sensor's dynamic behavior based on the electrical response and linear systems theory. The sensor's transient response was obtained with the model by exposing the oxide to air and propane gas; its stability was checked, and the stabilization time was calculated. Subsequently, an operating point was selected, and, with it, a propane gas detector was designed. The sensor operated flawlessly at 250 & DEG;C at a concentration of 1000 ppm, with a response time of three seconds. The developed device is inexpensive and easy to implement.</p>

引用

页数：15

共 39 条

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