Graphene oxide and Ag engulfed TiO2 nanotube arrays for enhanced electron mobility and visible-light-driven photocatalytic performance
By L. Sim, K. Leong, S. Ibrahim, P. Saravanan. 2014
149 citations recorded by the source corpus.
The visible-light-driven photocatalytic degradation of Methylene Blue (MB) and 2-chlorophenol (2-CP) were investigated using the composite of Ag nanoparticles (Ag NPs) and graphene oxide (GO) deposited over TiO2 nanotube arrays (TNTs). The resulting TNTs in the composite showed 100% anatase phase with no occurrence of the rutile phase. An implicit microscopic and spectroscopic technique (FESEM, HRTEM, FTIR and Raman analysis) confirmed the presence of Ag NPs and GO in the composite photocatalyst. It also exhibited an evident shift of the absorption edge in the visible range. The successful depositions of Ag contributed to improved photocatalytic activity in the visible spectrum owing to the existence of localized surface plasmon resonance (LSPR), and further the deposition of GO minimized the recombination of electron–hole pairs. The photocatalytic degradation of both MB and 2-CP followed pseudo-second order kinetics. In the primary run, both MB and 2-CP exhibited almost similar degradation efficiency of 68.3 and 66.8%, respectively. The reusability studies showed a deprived performance for MB degradation than that of 2-CP, due to chemisorption of MB. The prepared composite exhibited significantly larger enhancement in the photocatalytic oxidation of pollutants with greater electrons mobility to reactive sites of GO and Ag.
Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/bd02f0f093219acf75291f02a8351f1e1f8981e7
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In Materials Chemistry
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Synthesis of Surface Plasmon Resonance (SPR) Triggered Ag/TiO2 photocatalyst for degradation of Endocrine Disturbing Compounds (2014, background): “35 nm fringe spacing was observed and attributed to the face centered cubic (FCC) Ag (1 1 1) and TiO2 (1 0 1), respectively [3,21,38,42].”
- Synthesis, modification, and photo/photoelectrocatalytic degradation applications of TiO2 nanotube arrays: a review (2016, methodology): “performed photocatalytic decomposition of a model organic pollutant (methylene blue) with ternary GO/Ag/TiO2 NTAs structure [224].”