Diclofenac degradation based on shape-controlled cuprous oxide nanoparticles prepared by using ionic liquid

Abstract

Persulfate oxidation technology is widely used in wastewater treatment, but there are still many disadvantages, such as high energy consumption, side reaction and narrow pH applicability. Copper oxides can activate persulfate steadily with higher efficiency. In this paper, a novel preparation method of shape-controlled cuprous oxide (Cu2O) nanoparticles featured with high catalytic performance was explored. It was found that adding ionic liquid 1-butyl-3-methylimidazolium bromide ([BMIM]Br) during preparation of Cu2O can improve the degradation rate of diclofenac (DCF). Cu2O nanoparticles possess good stability in consecutive cycling tests, which was confirmed by X-ray photoelectron spectroscopy. The possible mechanism of Cu2O activating persulfate at different initial pH conditions was discussed based on electron paramagnetic resonance spin-trapping experiment. It was found that DCF was efficiently degraded in the Cu2O/peroxydisulfate (PDS) system within a broad pH range from 5 to 11. It proved via a quenching experiment that the activation process of PDS mainly occurs on the surface layer of Cu2O nanoparticles. As a result, shape-controlled Cu2O nanoparticles prepared by ionic liquid are expected to be used for in situ chemical oxidation, which is an effective oxidation processes to degrade DCF remaining in surface water and ground water.

A Copper-Based Biosensor for Dual-Mode Glucose Detection

“…In Figure 1B , the surface of the Cu 2 O NPs was rough and its SAED (inset of Figure 1B ) indicated that the Cu 2 O NPs have a polycrystalline structure ( Chinnaiah et al, 2022 ). The elemental mapping of Cu 2 O NPs ( Figure 1C ) and the corresponding high-resolution transmission electron microscopy (HRTEM) image shown in Supplementary Figure S3 (ESI†) confirmed its high-quality polycrystalline nature ( Huang and Luo, 2021 ). The phase structure and the purity of Cu 2 O NPs were analyzed using X-ray diffraction (XRD).…”

Principles and practice of greener ionic liquid–nanoparticles biosystem

“…2 and 4b). 34,166 IL-Cu 2 ONPs were prepared by adding various concentrations of imidazolium IL with bromide anion. The degradation of IL-Cu 2 ONPs was observed over the entire pH range, which confirmed that the concentrations of reactive oxygen species and the sulfate radical resulting from the cleavage of the interoxide bond to sodium persulfate are responsible for drug decomposition.…”

“…2 A short chronological survey of the timeline for IL-NPs milestones in biotechnological applications. [27][28][29][30][31][32][33][34][35][36][37][38][39][40] experimental evidence for the formation of gold and silver NPs within the structural components of living plants was presented by J. L. Gardea-Torresdey and co-authors in 2002 and 2003. 25,26 Intensive efforts were made to describe the biological applications of ILs-NPs systems with respect to their anticancer activity 18 to subsequently encompass antibacterial therapies.…”

“…31 Certain ILs-NPs were also reported to serve as antibacterial reagents, 32,33 while others contributed to the degradation of pharmaceuticals in the environment. 34 This review has been organized to offer a comprehensive description of ILs-NPs (bio)systems with particular emphasis on the greener concepts and techniques. We discuss the identification and assessment of research gaps in this research field, which will help stimulate advances in the incorporating ILs into NPs for the development of highly biologically active NMs for practical bioapplications, notably in terms of enhanced biocompatibility and increased bioavailability.…”

“…8 Biomedical application of IL-NPs system. 29,34,35,46,130 energy consumption, lower the reaction temperature, and increase the reaction rate. 59 Fig.…”