Glycerol-Mediated Facile Synthesis of Colored Titania Nanoparticles for Visible Light Photodegradation of Phenolic Compounds

Abstract

In this study, we developed a glycerol-mediated safe and facile method to synthesize colored titania nanoparticles (NPs) via solution route. Our method is considerably effective and greener than other options currently available. Colored titania NPs were produced by hydrolyzing TiCl4 precursor in aqueous solution containing different concentrations of glycerol (0.0, 1.163, 3.834, and 5.815 mol/L) and subsequent calcination at 300 °C for 1 h. Our results highlight firstly that glycerol-mediated synthesis is unlikely to affect the anatase crystalline structure of TiO2, and secondly, that it would lead to coloration, band gap narrowing, and a remarkable bathochromic redshift of the optical response of titania. More importantly, the synthesized colored titania have Ti3+ ions, which, at least in terms of our samples, is the major factor responsible for its coloration. These Ti3+ species could induce mid gap states in the band gap, which significantly improve the visible light absorption capability and photocatalytic performance of the colored titania. The photocatalytic experiments showed that the colored TiO2 NPs prepared in 1.163 mol/L aqueous glycerol solution displayed the best photocatalytic performance. Almost 48.17% of phenolic compounds and 62.18% of color were removed from treated palm oil mill effluent (POME) within 180 min of visible light irradiation.

Stability and Performance Enhancement of an Oligo (phenylene vinylene) Photocatalyst via Surface Grafting onto TiO2 for Visible‐Light Indigo Carmine Degradation

“…Therefore, high resolution XPS was used to further explore the photocatalysts surface. In TiO 2 /OPV, only two peaks assigned to the Ti spin‐orbit splitting (2p 3/2 and 2p 1/2 ) were discerned for the entire Ti2p region (Figure 3a) [50] . This observation suggests no major effect of the OPV on the chemical environment for the Ti.…”

Synthesis and Characterization of Carbon and Carbon-Nitrogen Doped Black TiO2 Nanomaterials and Their Application in Sonophotocatalytic Remediation of Treated Agro-Industrial Wastewater

“…Carbon doped black TiO 2 nanomaterial was synthesized via a modified chemical precipitation method, as reported in previous work [ 25 ]. Figure 1 shows a schematic illustration of the synthesis carbon doped black TiO 2 nanomaterial.…”

A Facile Green Synthesis of Nanostructured Gold–Silver@Carbon (Au–Ag@C) Nanocatalyst and its Applications

“…MNPs, such as, Au, Ag, and Au-Ag NPs, have been prepared by several reducing agents, such as, sodium borohydride [Tabrizi NS, 2013], ascorbic acid (AA) [Boote BW, 2013; Kannan R, 2014], glycerol [Nawaz R, 2019], hydroquinone [Kumar D, 2016], polysaccharides [Banerjee A, 2017], etc. Among these reducing agents, AA plays a versatile role and acts as an excellent reducing agent.…”