Synthesis, Characterization and Photocatalytic Activity of New Photocatalyst ZnBiSbO4 under Visible Light Irradiation

Abstract

In this paper, ZnBiSbO4 was synthesized by a solid-state reaction method for the first time. The structural and photocatalytic properties of ZnBiSbO4 had been characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, transmission electron microscope and UV-visible spectrometer. ZnBiSbO4 crystallized with a pyrochlore-type structure and a tetragonal crystal system. The band gap of ZnBiSbO4 was estimated to be 2.49 eV. The photocatalytic degradation of indigo carmine was realized under visible light irradiation with ZnBiSbO4 as a catalyst compared with nitrogen-doped TiO2 (N-TiO2) and CdBiYO4. The results showed that ZnBiSbO4 owned higher photocatalytic activity compared with N-TiO2 or CdBiYO4 for the photocatalytic degradation of indigo carmine under visible light irradiation. The reduction of the total organic carbon, the formation of inorganic products, SO42− and NO3−, and the evolution of CO2 revealed the continuous mineralization of indigo carmine during the photocatalytic process. One possible photocatalytic degradation pathway of indigo carmine was obtained. The phytotoxicity of the photocatalytic-treated indigo carmine (IC) wastewater was detected by examining its effect on seed germination and growth.

TiO2 Immobilized on Manihot Carbon: Optimal Preparation and Evaluation of Its Activity in the Decomposition of Indigo Carmine

“…In addition, the molecular ions with m / z 244 (peak 2) and 216 (peak 3) are the most abundant products and coincide with the compounds formed by photocatalysis on SnO 2 [ 39 ] and photoelectrocatalysis on Ti/TiO 2 /WO 3 electrodes [ 40 ]. Interestingly, under visible-light irradiation, the ZnBiSbO 4 photocatalyst produced 2-amino benzoic acid, which is the non-sulfonated form of compound 2 in Table 4 [ 42 ]. Electrochemical [ 43 ] and biological degradation processes [ 41 ] have also been reported to produce the aromatic compound isatin-5-sulfonic acid (mass 226) as an important degradation product of IC.…”

Property Characterization and Photocatalytic Activity Evaluation of BiGdO3 Nanoparticles under Visible Light Irradiation

“…Photocatalytic degradation has emerged as an efficient method for purification and treatment of polluted water and air in recent years [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. Compared with conventional methods including physical, chemical and biological processes, photocatalysis was considered to be the most efficient and have a market prospect for the degradation of persistent organic pollutants [ 13 , 14 , 15 ].…”

Influence of Solvents' Polarity on the Physicochemical Properties and Photocatalytic Activity of Titania Synthesized Using Deinbollia pinnata Leaves

“…The photocatalytic activity of the green TiO 2 NPs synthesized using the extracts of D. pinnata leaves with ethyl acetate as the solvent was tested out in the photodegradation of MO under UV light irradiation (1,200 W). The light source played a vital role in photocatalytic degradation as semiconductor compounds, such as TiO 2 , degrades volatile and organic pollutants under UV light irradiation (Cun et al, 2002 ; Laoufi and Bentahar, 2014 ; Luan et al, 2014 ). MO dye was chosen as the model organic pollutant and the photodegradation process was monitored by UV-visible spectrophotometer in the range of 800–200 nm.…”