Visible-light photo-assisted synthesis of GO-TiO2 composites for the photocatalytic hydrogen production |
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| Affiliation: | 1. Centro de Investigaciones en Geografía Ambiental Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro No. 8701, Morelia, Michoacán, Mexico;2. Facultad de Ingeniería en Tecnología de La Madera, Universidad Michoacana de San Nicolás de Hidalgo, Fco. J. Múgica S/n, Edificio “D”, Planta Alta, Ciudad Universitaria, Col. Felicitas Del Rio, C. P. 58040, Morelia, Michoacán, Mexico;3. Instituto de Investigaciones Económicas y Empresariales, Universidad Michoacana de San Nicolás de Hidalgo, Fco. J. Múgica S/n, Ciudad Universitaria, Col. Felicitas Del Rio, C. P. 58040, Morelia, Michoacán, Mexico;4. Facultad de Ingeniería Química, Universidad Michoacana de San Nicolás de Hidalgo, Fco. J. Múgica S/n, Edificio “M”, Ciudad Universitaria, Col. Felicitas Del Rio, C. P. 58040, Morelia, Michoacán, Mexico;1. Tecnológico Nacional de México, Instituto Tecnológico de Saltillo, 25280 Saltillo Coahuila, Mexico;2. CONACYT-Corporación Mexicana de Investigación en Materiales, 25290 Saltillo Coahuila, Mexico;3. Centro de Investigación en Química Aplicada, 25294 Saltillo Coahuila, Mexico;4. Cinvestav Saltillo, Apartado Postal 663, 25000 Saltillo, Coahuila, Mexico;1. Cuerpo Académico de Química Aplicada y Educativa, Facultad de Ciencias Químicas, Universidad Autónoma de Chihuahua, Nuevo Campus Universitario, Circuito Universitario, Chihuahua, Chih., C.P. 31125, Mexico;2. Centro de Investigación en Materiales Avanzados, S.C., Miguel de Cervantes #120, Complejo Industrial Chihuahua, Chihuahua, Chih., C.P. 31109, Mexico;3. Área de Ingeniería en Recursos Energéticos, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Mexico, D.F., C.P. 09340, Mexico |
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| Abstract: | The main aim of this study is to propose a fast and simple synthesis method for GO-TiO2 nanocomposites, which present self-tuning optoelectronic properties, advantageous features, for their application towards the photocatalytic hydrogen production. Graphene oxide (GO) was prepared through a modification of the Tour method from powder graphite by applying a microwave pretreatment. GO-TiO2 nanocomposites were synthesized by visible-light assisted anchoring, while the study of morphology, crystalline structure, size, surface area and optical characterization of the material was carried out by SEM, XRD, TEM, BET and UV-Vis spectroscopy, respectively. Photocatalytic activity evaluation of the composite material (GO-TiO2) towards hydrogen production through the water splitting reaction from water under visible light was followed by gas chromatography, reaching a production of 6500 μmolH2/g, thus showing an enhancement effect compared to the conventional H2 production using TiO2 only. |
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| Keywords: | Graphene oxide Photo-anchoring Photocatalysis Water splitting Hydrogen production |
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