Purification of organic pollutant by the novel ternary complex

Abstract

Reduced graphene oxide (rGO)-TiO 2 nanotube (TNT) composites sensitized by Meso-tetra (4-carboxyphenyl) porphyrin (H 2 TCPP/rGO-TNT) have been synthesized successfully with improved hydrothermal and heat reflux synthesis process. The chemical structure and performances of H 2 TCPP/rGO-TNT composites have been characterized by TEM-EDS-SAED, DRS and XRD. The influences of both rGO and/or H 2 TCPP for TNT to adsorb and degrade Rhodamine-B (RhB) have been analyzed by DRS. In addition, the degradation results showed a purification of more than 93 % RhB in wastewater, which is about 4.6 times higher than that of the pure TNT. The experimental results revealed that H 2 TCPP/rGO-TNT own superior degradation activity. This phenomenon is due to the excellent photons-capture system of the H 2 TCPP, and the high photoinduced electron mobility characteristic of graphene acceptor. Thus, these materials can be employed to degrade organic pollutants, and effectively applied in wastewater quality control and its treatment.

A Facile One-Pot Synthesis of Biomimetic Photocatalyst Zn(II)-Porphyrin-Sensitized 3D TiO2 Hollow Nanoboxes and Synergistically Enhanced Visible-Light Degradation

“…Therefore, it is of great importance issue for enhancing the visible-light photoreaction activity of TiO 2 -based photocatalysts to make full use of the abundant amount of the solar spectrum, but remains a great challenge. Up to date, there has been a significant amount of studies devoted to improve the visible-light utilization of TiO 2 by semiconductor coupling [ 19 – 21 ], metal and non-metal ions doping [ 22 , 23 ], and surface sensitized modification [ 24 – 26 ]. This can be explained by the fact that the surface oxygen vacancies act as photoinduced charges acceptors and adsorption sites suppress the recombination of photogenerated charges, leading to an increasing availability of photogenerated electrons and holes for photocatalytic reaction [ 27 – 29 ].…”

MoS2 quantum dots@TiO2 nanotube composites with enhanced photoexcited charge separation and high-efficiency visible-light driven photocatalysis

“…The mean peaks represented by the MoS 2 did not appear, but the result was consistent with the XRD spectra. According to the literature [31], all vibration peaks of the TNTs were below 1000 cm −1 . Figure 4 shows that the MoS 2 QDs@TNT composites and pure TNTs showed similar spectra of the comparable skeletons.…”