Hydrogen production using mixed oxides: TiO2-M (CoO and WO3)

Authors

  • Alejandro Pérez-Larios Universidad Autónoma Metropolitana
  • Ricardo Gómez Universidad de Guadalajara

Keywords:

Hydrogen production, Mixed oxide, Sol gel, Photocatalysts, UV-vis

Abstract

In this work we obtained materials of titanium dioxidewhit mixed oxide CoO-TiO2 and WO3-TiO2(1.0, 3.0, 5.0 %wt). The solids were characterizedby; nitrogen physisorption (BET) and porosity(BJH), XRD patterns and UV-Vis spectroscopy.The photoactivity was evaluated using a Pyrexreactor of 200 ml using a solution ethanol-water(1:1 molar ratio) and 0.1 g of catalyst using a highpressure Hg lamp (with a wavelength of 254 nmand an intensity of 2.2 mW/cm2 encapsulated ina quartz tube. The results showed materials withspecific surface area among 89 to 95 m2/g and 41to 91 m2/g with mesopority characteristics. TheXRD patterns show the formation of the crystallineanatase phase. The band gap energy (Eg) for thematerials were obtained with UV-Vis spectroscopy,the Eg values were lower than 3.2 eV for both mixedoxide. In the water splitting evaluation a maximin the efficient was found at Co and W at 5 wt.%.The hydrogen produced was 1000 μmol/h and 950μmol/h respectively, this is a value comparable torespect other works.

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Published

2013-12-01

How to Cite

Hydrogen production using mixed oxides: TiO2-M (CoO and WO3). (2013). Avances: Investigación En Ingeniería, 10(2), 27-34. https://revistas.unilibre.edu.co/index.php/avances/article/view/2746