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Adsorption and Photocatalytic Study of Phenol Using Composites of Activated Carbon Prepared from Onion Leaves (Allium fistulosum) and Metallic Oxides (ZnO and TiO2)

1
Facultad de Ciencias, Departamento de Química, Universidad de los Andes, Bogotá 111711, Colombia
2
Facultad de Ingeniería, Departamento de Ingeniería Química, Universidad de los Andes, Bogotá 111711, Colombia
3
Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia, Bogotá 111711, Colombia
*
Authors to whom correspondence should be addressed.
Catalysts 2020, 10(5), 574; https://doi.org/10.3390/catal10050574
Received: 20 April 2020 / Revised: 11 May 2020 / Accepted: 13 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Photocatalytic Degradation of Organic Wastes in Water)
The aim of this study was to evaluate and compare the adsorption and photocatalytic activity of activated carbon-based photocatalysts. Titanium dioxide (TiO2) and zinc oxide (ZnO) were chosen as semiconductors to prepare composites with activated carbon by the wet impregnation method. Activated carbon was prepared using as starting material onion leaves (Allium fistulosum) and as activating agent phosphoric acid (H3PO4). Photooxidation and batch adsorption of phenol was studied to compare the efficiency of the materials prepared. The results showed that the composite AC–TiO2 has a greater photocatalytic activity and a better adsorption capacity compared to AC–ZnO composite. View Full-Text
Keywords: adsorption; photocatalysis; activated carbon; graphene; composites adsorption; photocatalysis; activated carbon; graphene; composites
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Hernández-Barreto, D.F.; Rodriguez-Estupiñán, J.P.; Moreno-Piraján, J.C.; Sierra Ramírez, R.; Giraldo, L. Adsorption and Photocatalytic Study of Phenol Using Composites of Activated Carbon Prepared from Onion Leaves (Allium fistulosum) and Metallic Oxides (ZnO and TiO2). Catalysts 2020, 10, 574.

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