GO-TiO2 as a Highly Performant Photocatalyst Maximized by Proper Parameters Selection

Abstract

The synthesis and characterization of novel graphene oxide coupled to TiO2 (GO-TiO2) was carried out in order to better understand the performance of this photocatalyst, when compared to well-known TiO2 (P25) from Degussa. Thus, its physical-chemical characterization (FTIR, XRD, N2 isotherms and electrochemical measurements) describes high porosity, suitable charge and high electron mobility, which enhance pollutant degradation. In addition, the importance of the reactor set up was highlighted, testing the effect of both the irradiated area and distance between lamp and bulb solution. Under optimal conditions, the model drug methylthioninium chloride (MC) was degraded and several parameters were assessed, such as the water matrix and the catalyst reutilization, a possibility given the addition of H2O2. The results in terms of energy consumption compete with those attained for the treatment of this model pollutant, opening a path for further research.

Degradation of trimethoprim by advanced oxidation process using UV/TiO2and H2O2: Kinetic and economic aspects

“…The addition of H 2 O 2 to the photocatalytic process (UV/TiO 2 ) can help enhance the TMP degradation efficiency because the UV/H 2 O 2 process can cause the release of a large number of OH• radicals to participate in the oxidation reactions of pollutant compounds 10 . Furthermore, H 2 O 2 is an oxidant that can also contribute to the activation of TiO 2 catalysts by removing contaminants from their surfaces 24 . Figure 4 shows that, when adding H 2 O 2 to the TiO 2 suspension, hydrogen peroxide quickly adsorbs to the TiO 2 catalyst surface to form Ti‐OOH complexes 25 .…”

“…10 Furthermore, H 2 O 2 is an oxidant that can also contribute to the activation of TiO 2 catalysts by removing contaminants from their surfaces. 24 Figure 4 shows that, when adding H 2 O 2 to the TiO 2 suspension, hydrogen peroxide quickly adsorbs to the TiO 2 catalyst surface to form Ti-OOH complexes. 25 So, H 2 O 2 can act as an electron trap to limit e -/h + recombination.…”

Influencing Factors and Kinetics of Modified Shell Powder/La-Fe-TiO2 Photocatalytic Degradation of Pyridine Wastewater

“…Photocatalytic oxidation takes advantage of the strong oxidation capacity of the photocatalyst oxidant to open the ring and remove nitrogen, before finally realizing complete mineralization, making it lose toxicity without secondary pollution. Among them, TiO 2 has become a research hotspot of photocatalysts due to its high chemical stability, non-toxic, low cost and other advantages, and its photostability and efficiency are highly favored [ 13 , 14 , 15 , 16 , 17 ]. Ortega Liébana et al found that 3-chloropyridine was completely mineralized under TiO 2 photocatalysis [ 18 ].…”

Advanced Oxidation Process: Applications and Prospects

“…With WLP (without H 2 O 2 ), it was possible to remove more than 73% of the PAHs tested from the outer layer of PFPC in 3 days. Díez et al [18] carried out the synthesis and characterization of novel graphene oxide coupled to TiO 2 (GO-TiO 2 ) in order to better understand the performance of this photocatalyst compared to the well-known TiO 2 (P25) from Degussa. Checa et al [19] synthesized and characterized a magnetic graphene oxide titania (FeGOTi) catalyst for application in primidone removal from water, and checked for any possible enhancements.…”