Photocatalytic Degradation of Bisphenol-A using N, Co Codoped TiO2 Catalyst under Solar Light

Abstract

Advanced oxidation processes (AOPs) including heterogeneous photocatalysis has proven as one of the best technique for waste-water treatment. Photocatalytic process using semiconductor like TiO2 based heterogeneous photocatalysis is a promising method for the treatment of toxic pollutants. In the present study, visible-light photoactive cobalt and nitrogen co-doped TiO2 nanoparticles were synthesized via wet impregnation method. The photocatalysts were characterized using X-ray diffraction (XRD), Raman Spectra, Fourier Transform Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM), UV-vis spectrophotometer and X-ray photoelectron spectrophotometer (XPS). The photocatalytic activitiy of prepared (N, Co)-codoped TiO2 on the mineralization of Bisphenol-A (BPA) under visible light irradiation was studied and the results were compared to commercial TiO2 (Degussa P25). The results demonstrated that 1.5% Co and 0.5% N – codoped TiO2 samples revealed higher activity than commercial TiO2. Total organic carbon (TOC) removal was observed to be 97%, which indicate the complete mineralization of BPA. GC-MS analysis was carried to find out the possible intermediates formed and reaction pathway.

Thermocatalytic membrane distillation for clean water production

“…This is the first attempt to integrate MD with a thermocatalyst and the new technology still presents some challenges. Firstly, despite the kinetic constants for BPA degradation for CSF under dark conditions have the same magnitude of those observed for the traditional TiO 2 photocatalysts under UV light [48][49][50][51] , our perovskite contains cerium, which makes it intrinsically more expensive than TiO 2 . Moreover, the perovskite was synthetized by the solutioncombustion method, which is a well-established and reproducible lab-scale procedure.…”

Functional CdS-Au Nanocomposite for Efficient Photocatalytic, Photosensitizing, and Two-Photon Applications

“…Nowadays, photocatalysts gain particular interest as they enable conversion of, for example, solar into chemical energy, allowing chemical reactions to occur. A very important branch of photo-driven catalytic reactions is those using nanoparticles (NPs) as a controlling factor in processes such as wastewater treatment [3,4], CO 2 reduction [5,6], or hydrogen generation [7,8].Hybrid nanosystems, such as ZnO nanoparticles with Au domains [9,10], Au tipped CdSe nanorods [11], Pt-decorated CdS nanorods [12], CdSe nanoplatelets with Pd domains [13], Cu 2 O NPs with Au core [14], and even more complex systems like TiO 2 nanowires enriched with Au NPs and deposited Cu 7 S 4 [15], have been recently proposed as photocatalysts and solar energy converters. A very interesting approach was proposed by Yu et al [16], who synthesized Ag/AgCl/TiO 2 nanotube arrays and demonstrated their photocatalytic activity, taking visible light-driven methyl orange degradation as an example.…”

“…Nowadays, photocatalysts gain particular interest as they enable conversion of, for example, solar into chemical energy, allowing chemical reactions to occur. A very important branch of photo-driven catalytic reactions is those using nanoparticles (NPs) as a controlling factor in processes such as wastewater treatment [3,4], CO 2 reduction [5,6], or hydrogen generation [7,8].…”

Impact of Titanium Dioxide (TiO2) Modification on Its Application to Pollution Treatment—A Review

“…Therefore, metal and non-metal ion co-doping enhance photocatalytic activity [163,171]. Garg et al [172] tested the photocatalytic performance of prepared N and Co-co-doped TiO 2 on the removal of Bisphenol-A under visible light. The results showed that the maximum degradation rate (95%) was observed when using 1.5% Co and 0.5% N co-doping TiO 2 .…”