Assisted sonocatalytic degradation of pethidine hydrochloride (dolantin) with some inorganic oxidants caused by CdS-coated ZrO2 composite

Abstract

CdS was synthesized via hydrothermal method and CdS-coated ZrO 2 composite was prepared via chemical precipitation method. And then they were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). After that, the sonocatalytic degradation of pethidine hydrochloride (dolantin) in aqueous solution was conducted adopting CdS-coated ZrO 2 composite as sonocatalyst with inorganic oxidant assisted. In addition, some influencing factors such as inorganic oxidant kind, including persulfate (K 2 S 2 O 8), perchlorate (NaClO 4) and periodate (KIO 4), inorganic oxidant concentration and ultrasonic irradiation time on sonocatalytic degradation of pethidine hydrochloride were examined by using gas chromatograph. The experimental results showed that the used inorganic oxidants can effectively assisted the sonocatalytic degradation of pethidine hydrochloride caused by CdS-coated ZrO 2 composite and the increase effects arrange as the order of K 2 S 2 O 8 > KIO 4 > NaClO 4. And the best sonocatalytic degradation ratio (95.50 %) of pethidine hydrochloride could be obtained when the conditions of 10.00 mmol/L K 2 S 2 O 8 , 1.00 g/L prepared CdS-coated ZrO 2 composite, 135 min

A study on the effect of presence of CeO2 and benzotriazole on activation of self‐healing mechanism in ZrO2 ceramic‐based coating

“…Such films mainly include zirconium oxide. Organic materials can also exist in such coatings which depend on heat‐treatment time and temperature, also the amount of remained organic materials in the films decrease if time and temperature increase . The microstructural images of the morphology of zirconia ceramic‐based coatings are shown in Figure A,D.…”

“…Organic materials can also exist in such coatings which depend on heat-treatment time and temperature, also the amount of remained organic materials in the films decrease if time and temperature increase. 26,27 The microstructural images of the morphology of zirconia ceramic-based coatings are shown in Figure 2A,D. The images show crack initiation and non-uniformity in the zirconia single-component coating.…”

Hybrid Advanced Oxidation Processes Involving Ultrasound: An Overview

“…Furthermore, they also increase the number of cavitation bubbles by acting as nucleation sites. The presence of catalysts can increase the quantity of free radicals generated, thus enhancing the rate of degradation of organic pollutants [93,94,95,96,97,98,99,100,101,102,103,104,105]. An acoustic cavitation process is also useful to generate active catalysts.…”

Construction of Z‐scheme Pt‐TiO2/(Er3+:Y3Al5O12@Ta2O5)/HAP and its application in sonocatalytic degradation of prometryn and disinfection of Escherichia coli

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