Annealed Ti/Zn-TiO2 nanocomposites tested as photoanodes for the degradation of Ibuprofen

Abstract

Ti/Zn-TiO 2 electrodes were successfully prepared by the co-deposition method, on a titanium substrate, using an acidic zinc sulphate solution with TiO 2 nanoparticles in suspension. After electrodeposition, samples were heated in air at 450°C for 6 h. The X-ray diffraction analysis of the deposits point to the metal matrix modification from Zn to ZnO. In addition, the scanning electron microscopy results indicate that the films have a high surface area with a rich morphology, due to the appearance of ZnO needle-shaped grains. The voltammograms recorded, in Na 2 SO 4 solution, for these electrodes under illumination at λ0365 nm confirmed the films photoactivity. Photoelectrochemical degradation of Ibuprofen (Ibu) was achieved with the Zn-TiO 2 electrodes after thermal treatment. UV-Vis spectrometry, high-performance liquid chromatography (HPLC), chemical oxygen demand (COD) and total organic carbon (TOC) measurements were performed and data demonstrated that Ibuprofen was efficiently degraded. Absorbance at 220 nm, COD and TOC removals of 35%, 34% and 23%, respectively, were obtained after a 3 h period.

Defective TiO2 Nanotube Arrays for Efficient Photoelectrochemical Degradation of Organic Pollutants

“…The PEC degradation of IBF using TiO 2– x in this work was faster than other photoanodes reported in the literature (Table S2). For example, using the Ti/Zn-TiO 2 catalysts during IBF degradation under PEC condition yielded k 1 = 0.0008 min –1 , which is slower than the present study …”

“…For example, using the Ti/Zn-TiO 2 catalysts during IBF degradation under PEC condition yielded k 1 = 0.0008 min –1 , which is slower than the present study. 62 …”

“…For example, using the Ti/Zn-TiO 2 catalysts during IBF degradation under PEC condition yielded k 1 = 0.0008 min −1 , which is slower than the present study. 62 In addition, the degradation quantum yield of IBF was also calculated using eq 4, and the results demonstrate an excellent photoelectrocatalytic performance of TiO 2−x (1.219 mol Einstein −1 ) compared to TiO 2 (0.268 mol Einstein −1 ). Quantum yields of IBF degradation by the TiO 2−x were higher than those in the UV-based advanced oxidation processes (Table S3).…”

A Possible Growth Mechanism for ZnO-TiO2Composite Nanostructured Films Prepared by Electrodeposition

“…These parameters are in agreement with the published ones. 14,34,35 The presence of the nanoparticles promotes a slightly increase in the cell parameters, which becomes more significant with the addition of 10 g L −1 of TiO 2 . Moreover, from Table IV, it can be seen that the c/a ratio are similar and very close to the standard value (the ideal values must be in the range c/a = 1.593-1.6035) indicating that the films are displaying a low degree of distortion.…”

Highly Efficient Degradation of Linear Alkylbenzene Sulfonate Surfactant by MIL‐53 (Fe) Metal Organic Framework Derived Electro‐Fenton Applicable in Water Treatments

“…All the above-mentioned advantages have made the Electro-Fenton process an efficient treatment method for removing drugs, [13,14] surfactants, [5] dyes, [15,16] phenol, [17] herbicides, [18,19] and… from water.…”