Facile synthesis of the Ti3+ self-doped TiO2-graphene nanosheet composites with enhanced photocatalysis

Abstract

This study developed a facile approach for preparing Ti3+ self-doped TiO2-graphene photocatalyst by a one-step vacuum activation technology involved a relative lower temperature, which could be activated by the visible light owing to the synergistic effect among Ti3+ doping, some new intersurface bonds generation and graphene oxide reduction. Compared with the traditional methods, the vacuum activation involves a low temperature and low-costing, which can achieve the reduction of GO, the self doping of Ti3+ in TiO2 and the loading of TiO2 nanoparticles on GR surface at the same time. These resulting TiO2-graphene composites show the high photodegradation rate of MO, high hydrogen evolution activity and excellent IPCE in the visible light irradiation. The facile vacuum activation method can provide an effective and practical approach to improve the performance of TiO2-graphene and other metal oxides-graphene towards their practical photocatalytic applications.

Purification of organic pollutant by the novel ternary complex

“…In addition, the SAED images of Fig. 3 shows that the TNTs are well-hold crystalline after modified by rGO [9][10][11][12]. The result is just the same as the below XRD spectrums characterization, as shown in Fig.…”

Novel Synthesis of Plasmonic Ag/AgCl@TiO2 Continues Fibers with Enhanced Broadband Photocatalytic Performance

“…Compared with Ag/AgCl, S-CTF almost retains the same absorption intensity in the visible light region, illustrating that the composition of TF and Ag/AgCl has no The valence state of Ti, O, Cl and Ag in S-CTF are investigated by the high-resolution XPS spectrum (Figure 4b-e). As shown in Figure 4b, the binding energy at 458.6 and 464.6 eV of Ti 2p 1/2 and Ti 2p 3/2 are lower than those of pure TiO 2 (459.4 and 464.7 eV) [39]. The curve resolution of the Ti 2p signal of S-CTF indicates four different peaks.…”

“…Therefore, the enhancement of absorption in the UV light region can be ascribed to the combination of TF and AgCl with excellent UV light absorption. Because of the formation of Ti 3+ and oxygen vacancy, TF possesses localized states below the conduct bind(CB) minimum and shows expected light absorption in the visible light region [39,44,45]. TF shows an absorption band edge at about 400 nm, and the absorption band edge of CTF and S-CTF (at about 420 nm) shows an expected red-shift, in comparison to TF.…”

Preparation and application of poly(zwitterionic ionic liquid) to enhance the photocatalytic activity of TiO2

“…This can be ascribed to the electron promotion of TiO 2 from the valence band to the conduction band [45]. The absorption band of the TiO 2 loading on the PIL shows a red shift, which exhibits an enhanced adsorption range of PIL@TiO 2 in the visible region [46,47]. And PIL@TiO 2 possesses much better light adsorption intensity than TiO 2 , indicating its higher photocatalytic activity for dye solutions [45].…”