products have been tested (Ahmari et al. 2018), and recent literature revisions on this
topic have been published in the last couple of years explaining some more advances
in this field (Lee et al. 2017; Li and Yang 2018; Freyria et al. 2018).
Organic Dyes
Recent reports about the preparation and application of TiO 2 -based catalysts in the
photodegradation of organic dyes are grouped in Table 7.1, which was recently
summarized by Wang and coworkers when reviewing the photocatalytical properties
of graphene-based hybrid materials (Wang et al. 2013a).
Thus, graphene–TiO 2 composite, as a rising star material, is the most common
hybrid photocatalyst for the degradation of dyes (Neppolian et al. 2012; Jiang et al.
2011; Li et al. 2012; Zhang et al. 2012b; Shah et al. 2012; Nguyen-Phan et al. 2012;
Morales-Torres et al. 2012; Tan et al. 2012). Because of its nanometer size, TiO 2
showed enhanced photodecomposition efficiency under visible light compared to
pristine TiO 2 , the commercial TiO 2 (P25) and the physical mixture of graphene and
commercial P25. This result may be due to both the large contact surface area and
high conductive graphene which reduce the charge resistance and the charge
recombination rate.
Scheme 7.1 Ibuprofen degradation by photocatalysis under UV light and simulated solar irradiation and sonophotocatalysis. (Michael et al. 2014)
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A. Boudjemaa and S. Gómez-Ruiz
topic have been published in the last couple of years explaining some more advances
in this field (Lee et al. 2017; Li and Yang 2018; Freyria et al. 2018).
Organic Dyes
Recent reports about the preparation and application of TiO 2 -based catalysts in the
photodegradation of organic dyes are grouped in Table 7.1, which was recently
summarized by Wang and coworkers when reviewing the photocatalytical properties
of graphene-based hybrid materials (Wang et al. 2013a).
Thus, graphene–TiO 2 composite, as a rising star material, is the most common
hybrid photocatalyst for the degradation of dyes (Neppolian et al. 2012; Jiang et al.
2011; Li et al. 2012; Zhang et al. 2012b; Shah et al. 2012; Nguyen-Phan et al. 2012;
Morales-Torres et al. 2012; Tan et al. 2012). Because of its nanometer size, TiO 2
showed enhanced photodecomposition efficiency under visible light compared to
pristine TiO 2 , the commercial TiO 2 (P25) and the physical mixture of graphene and
commercial P25. This result may be due to both the large contact surface area and
high conductive graphene which reduce the charge resistance and the charge
recombination rate.
Scheme 7.1 Ibuprofen degradation by photocatalysis under UV light and simulated solar irradiation and sonophotocatalysis. (Michael et al. 2014)
230
A. Boudjemaa and S. Gómez-Ruiz