@misc{10481/63403,
year = {2020},
month = {6},
url = {http://hdl.handle.net/10481/63403},
abstract = {Functionalized graphene derivatives including graphene oxide (GO), reduced graphene
oxide (rGO), and heteroatom (nitrogen/sulphur (N/S) or boron (B))-doped graphene were used to
synthesize composites with TiO2 (T). The photocatalytic performance of composites was assessed
for the degradation of Orange G dye (OG) under simulated solar light. All the prepared graphene
derivatives—TiO2 composites showed better photocatalytic performance than bare TiO2. A higher
photocatalytic activity was found for the composites containing GO and N/S co-doped rGO
(kapp = 109.2 × 10−3 and 48.4 × 10−3 min−1
, for GO-T and rGONS-T, respectively). The influence of
both initial solution pH and the reactive species involved in the OG degradation pathway were
studied. The photocatalytic activity of the samples decreased with the increase of the initial pH
(from 3.0 to 10.0) due to the occurrence of electrostatic repulsive forces between the photocatalysts
surface and the molecules of OG, both negatively charged. The use of selective scavengers showed
that although the photogenerated holes dominate the degradation mechanism, radicals and singlet
oxygen also participate in the OG degradation pathway. In addition, reutilization experiments
indicated that the samples were stable under the reaction conditions used.},
organization = {ERDF/Ministry of Science, Innovation and Universities-State Research Agency 	
RTI2018-099224-B-I00},
publisher = {MDPI},
keywords = {Graphene oxide},
keywords = {TiO2},
keywords = {Heteroatom doping},
keywords = {Photocatalysis},
keywords = {Orange G},
keywords = {Scavengers},
title = {Functionalized Graphene Derivatives and TiO2 for High Visible Light Photodegradation of Azo Dyes},
doi = {doi:10.3390/nano10061106},
author = {Pérez Molina, Álvaro and Morales Torres, Sergio and Maldonado Hodar, Francisco José and Pastrana Martínez, Luisa María},
}