| Autor: |
Morales-Bautista J; Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara, Guadalajara 44410, Mexico., Guillén-Bonilla H; Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara, Guadalajara 44410, Mexico., Guillén-Bonilla A; Departamento de Ciencias Computacionales e Ingenierías, CUVALLES, Universidad de Guadalajara, Carretera Guadalajara-Ameca Km 45.5, Ameca 46600, Mexico., Rodríguez-Betancourtt VM; Departamento de Química, CUCEI, Universidad de Guadalajara, Guadalajara 44410, Mexico., Ramírez-Ortega JA; Departamento de Física, CUCEI, Universidad de Guadalajara, Guadalajara 44410, Mexico.; Campus Guadalajara, UNITEC MÉXICO, Universidad Tecnológica de México, Calz. Lázaro Cárdenas 405, San Pedro Tlaquepaque 45559, Mexico., Guillén-Bonilla JT; Departamento de Electro-Fotónica, CUCEI, Universidad de Guadalajara, Guadalajara 44410, Mexico. |
| Abstrakt: |
Nickel antimonate (NiSb 2 O 6 ) powders were synthesized using a wet chemistry process assisted by microwave radiation and calcination from 600 to 700 °C to evaluate their photocatalytic and gas-sensing properties. The crystalline phase obtained at 800 °C of trirutile-type nickel antimonate was confirmed with powder X-ray diffraction. The morphology and size of the nanostructures were analyzed employing electron microscopy (SEM and TEM), identifying irregular particles and microrods (~277 nm, made up of polyhedral shapes of size ~65 nm), nanorods with an average length of ~77 nm, and nanostructures of polyhedral type of different sizes. UV-vis analysis determined that the bandgap of the powders obtained at 800 °C was ~3.2 eV. The gas sensing tests obtained a maximum response of ~5 for CO (300 ppm) at 300 °C and ~10 for C 3 H 8 (500 ppm) at 300 °C. According to these results, we consider that NiSb 2 O 6 can be applied as a gas sensor. On the other hand, the photocatalytic properties of the antimonate were examined by monitoring the discoloration of malachite green (MG) at five ppm. MG concentration monitoring was carried out using UV-visible spectroscopy, and 85% discoloration was achieved after 200 min of photocatalytic reaction. |
