Abstract
The reduced graphene oxide dopped equaixial geometry TiO2 (rGO/egTiO2) composite as photocatalyst was synthesized hydrothermally with various mass ratios of tetrabutyl titanate. The photocatalyst is considered to be rGO/equaixial geometry TiO2 in terms of modifying the combined reduced graphene Oxide and TiO2. The rGO plays a vital role in rGO/egTiO2 composite as photocatalysts were analyzed in methylene blue (MB) and rhodamine B (RhB) photocatalytic degradation under UV and simulated solar light irradiation. This synthesized catalyst was characterized by various analytical techniques such as XPS, XRD, SEM, BET, and TEM. The rGO/egTiO2 composite exhibits enhanced photocatalytic performance with degradation rates of 97.5 and 97% on RhB and MB for 60 min under UV radiation respectively, while the degradation rate of 94 and 92 % was observed on the same dyes for 6 h under the simulated sunlight radiation. The enhanced photocatalytic performance of the rGO/egTiO2 composite under ultraviolet irradiation source was owing to a high separation efficiency of the photo-induced electron-hole pairs, while the photocatalytic performance under simulated sunlight radiation was due to the photosensitive and charge separator behavior of rGO. This offers us an excellent potential of significant photocatalytic activity for the removal of organic contaminants from wastewater.
Highlights
In the past few decades, all the industries in the world have achieved remarkable growth and their impact on the living standards of peoples have been continuously improved
We have successfully synthesized the reduced graphene oxide dopped equaixial geometry TiO2 composite with different ratios of tetrabutyl titanate supported on rGO in isopropyl alcohol via hydrothermal followed by solvothermal method
Characterizations was taken via XRD, SEM, BET, TEM, and UV-vis diffuse reflection to analyze the materials, the rGO/equaixial geometry TiO2 exhibited the greatest photocatalyst activity in UV and simulated sunlight radiation for the degradation of rhodamine B (RhB) and methylene blue (MB) dye
Summary
In the past few decades, all the industries in the world have achieved remarkable growth and their impact on the living standards of peoples have been continuously improved. It can use inexhaustible solar energy to convert it into chemical energy, which can photo catalytic electrolysis water into H2 and O2, or degrade some toxic compounds that are difficult to degrade (Nguyen et al 2020, Trapalis et al 2016) This technology has improved or auxiliary effects some conventional methods of destroying or transforming hazardous chemical waste such as high-temperature incineration activating sludge decomposition, and conventional physicochemical treatment (Cao et al 2019, Wu et al 2020, Zouzelka et al 2019), and it is expected to replace traditional energy sources as hydrogen energy. Due to the decrease in the recombination of photo-generated electron-hole pairs, TiO2/graphene composites could display enhanced photocatalytic activities (Gao et al 2009). The outcome demonstrates that rGO/egTiO2 composite has a wider range from UV to visible light and greater absorption abilities to the solar irradiation than egTiO2 itself This performance will achieve effective pollution mitigation to maintain the minimum level of environmental flows, and to ensure the purity of water in the environment
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