Sunlight-driven photocatalytic degradation of ciprofloxacin and organic dyes by biosynthesized rGO–ZrO2 nanocomposites

Kaushal, Sandeep; Kumari, Vanita; Singh, Prit Pal

doi:10.1007/s11356-023-27000-6

Cited by 28 publications

(9 citation statements)

References 51 publications

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“…Intermediate products generated in the photocatalytic degradation of CIP can originate from the main pathways documented in the relevant literature. − These pathways include the breakdown of the quinolone or piperazine rings, defluorination, hydroxylation, formation of hydroxy keto derivatives, and decarboxylation. These reactions contribute to the formation of diverse intermediate compounds.…”

Section: Resultsmentioning

confidence: 99%

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Nasari,

Taherimehr

2023

Langmuir

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A heterogeneous photocatalyst, MgFe 2 O 4 /UiO-67 (MU-x), was successfully synthesized by doping magnetic magnesium ferrite nanoparticles (MgFe 2 O 4 ) with the UiO-67 metal−organic framework at various weight ratios (MgFe 2 O 4 : UiO-67 at 30, 50, 70, and 90 wt %). Various techniques, including Xray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR) , Brunauer−Emmett−Teller (BET), photoluminescence (PL), vibrating sample magnetometry (VSM), electrochemical impedance spectroscopy (EIS), and ultraviolet−visible diffuse reflectance spectroscopy (UV−vis DRS), were used to characterize the prepared photocatalysts. The photocatalytic performance of MU-x in the degradation of ciprofloxacin (CIP) under visible light was assessed. The CIP degradation efficiency was found to increase as the amount of MgFe 2 O 4 in the composite was increased up to 70 wt %. Experimental conditions were optimized using response surface methodology (RSM) based on central composite design (CCD) with three factors: initial pH, catalyst loading, and CIP concentration. Using the obtained model, the optimal conditions were determined as follows: initial pH of 8.025, catalyst loading of 33.8 wt %, and CIP concentration of 10.8 mg/L. Under these optimal conditions, a notable improvement was achieved, with 99.62% of CIP removal achieved within 90 min, surpassing the performance of previously reported photocatalysts. Total organic carbon (TOC) analysis revealed a high degree of mineralization, at 81.25%. The degradation pathway of CIP was investigated based on liquid chromatography−mass spectrometry (LC-MS) analysis. Finally, the values of E CB and E VB of the photocatalyst were determined and the possible degradation mechanism of CIP was investigated based on Mott−Schottky and the applied scavengers. The hydroxyl radical ( • OH) was identified as the dominant species in the removal of CIP through a trapping experiment. The photocatalyst with 70 wt % of MgFe 2 O 4 (MU-70) exhibited excellent stability and recoverability with an external magnet, demonstrating 86.33% CIP removal after four cycles. According to the obtained results, MU-70 is a promising visible-light-active photocatalyst with great potential for water treatment applications and convenient recovery.

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Section: Resultsmentioning

confidence: 99%

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Nasari,

Taherimehr

2023

Langmuir

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“…Photocatalysis is a chemical process that transforms contaminants into non‐toxic spinoffs like CO 2 , and H 2 O [31] . In this process, When a nano‐photocatalyst is subjected to light with an energy greater than its band gap, it induces the excitation of e − from the valence band (VB) to the conduction band (CB), resulting in +ve holes (h + ) in the valence band while allowing e − without causing the NPs to disintegrate at the conduction band [8,28,29,31–40] . The surface‐adsorbed H 2 O molecules in the VB trapped the highly oxidative h + to form OH, while the adsorbed molecular O 2 scavenges e − to generate the superoxide radical anion (O 2 ⋅) [8,28,29,31–34,38,40–42] .…”

Section: Mechanism Of Maxilon Dye Photocatalytic Degradation Using Npsmentioning

confidence: 99%

“…). [8,28,29,[31][32][33][34]38,[40][41][42] The e À /h + charge carriers that are produced as a result then move toward the outer layer (surface). In addition, * OH radicals are also produced by further interaction between the O 2 * radical anion and the H 2 O molecule.…”

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confidence: 99%

“…The * OH and O 2 * radicals then attack the molecules of maxilon dye, converting them into less complex and non-toxic chemicals. [8,28,29,[31][32][33][34]36,38,39,[41][42][43][44] The degradation by this radical attack is often established or judged by the rupture of the primary carbon bonds of the dye pollutant, the disintegration of the dye pollutant aromatic ring, CÀ N bond, and C=N cleavage. [28,33,45] The plausible mechanism and stepwise equation of the explanation in the foregoing paragraph as per maxilon dye photodegradation using NPs when exposed to light are provided in Figures 2 and 3 respectively.…”

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confidence: 99%

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Photocatalytic Degradation of Maxilon Dye Pollutants using Nano‐Architecture Functional Materials: A Review

Emmanuel,

Adesibikan,

Olawoyin

et al. 2024

ChemistrySelect

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The most essential task in the twenty‐first century is to fight the alarming growing pollution in the aquatic body in which effluent of one of the most colouring dye categories called maxilon dye is a major contributor. This review thus specifically focuses on the use of nanoparticles (NPs) for photocatalytic degradation of maxilon dye contaminants in water bodies. The work empirically presented the performance evaluation of NPs in degrading maxilon dyes under light irradiation alongside the underlying operational photocatalytic degradation mechanism. The stability of NPs was also critically analyzed by looking at the regenerability and reusability of expended NPs. From the study, it was discovered that ⋅OH and O2⋅ played a vital role in the genesis of the oxidizing capacity of NPs for the photocatalytic breakdown of maxilon dye. Moreover, it was found that the degradation performance of most NPs is greater than 80 % and the shortest degradation period is < 1 hour with pseudo‐first‐order (PFO) being the most common kinetic best‐fit to describe the adsorption process that occurred shortly before and during the degradation operation. At the end, knowledge gaps were identified in the area of regenerability, the lifecycle analyses of nano‐photocatalyst fabrication and utilization, cost analysis for industrial scale‐up, maxilon dye ecotoxicological study, and degradation pathways. The findings of this study can open up insightful innovation for readers and industries that are interested in pursuing zero water insecurity.

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“…Green approaches to metal oxide nanoparticles synthesis are significant because of their environmental friendliness, [4][5][6][7] low cost, physical and chemical properties, and industrial applications. [8][9][10] Metal zirconium oxide is a good material which has been extensively used in the reinforcement of structures, antibacterial agents, and dye degradation. 11 Zirconia is widely used in electrochemical capacitors, microelectronics, anticorrosive coatings, used in sensors, catalysis, fuel cells, and magnetic materials.…”

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confidence: 99%

Prospective in vitro A431 cell line anticancer efficacy of zirconia nanoflakes derived from Enicostemma littorale aqueous extract

Sumathi¹,

Renuka

Subramanian³

et al. 2023

Cell Biochemistry & Function

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Biomedical applications of zirconia nanomaterials were limited in biological systems. In this research, 8–15 nm size zirconia nanoflakes (ZrNFs) were fabricated and their nature, morphology, and biocompatibility were evaluated. The synthesis was carried out using Enicostemma littorale plant extract as an effective reducing and capping agent. Physiochemical properties of prepared ZrNFs were characterized using diverse instrumental studies such as UV‐vis spectrophotometer, Fourier‐transform infrared, powder X‐ray diffractometer, scanning electron microscope, transmission electron microscope (TEM), energy dispersive X‐ray, and cyclic voltammetry (CV). The XRD pattern confirmed the tetragonal phases of ZrNFs and the highest crystallite size of Zr0.02, Zr0.02, and Zr0.06 was 56, 50, and 44 nm, respectively. The morphology of samples was assessed using TEM. Electrophysiological effects of ZrNFs in the cellular interaction process were revealed by the slower rate of electron transfer results in CV demonstration. Biocompatibility of synthesized ZrNFs was studied on A431 human epidermoid carcinoma epithelial cells. The cell viability was increased with an increasing the concentration of nanoflakes up to 6.50–100 μg/mL. The cell viability and observed IC50 values (44.25, 36.49, and 39.62 μg/mL) reveals that the synthesized ZrNFs using E. littorale extract is found to be efficient toxic to A431 cancer cell lines.

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Sunlight-driven photocatalytic degradation of ciprofloxacin and organic dyes by biosynthesized rGO–ZrO2 nanocomposites

Cited by 28 publications

References 51 publications

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Photocatalytic Degradation of Maxilon Dye Pollutants using Nano‐Architecture Functional Materials: A Review

Prospective in vitro A431 cell line anticancer efficacy of zirconia nanoflakes derived from Enicostemma littorale aqueous extract

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Sunlight-driven photocatalytic degradation of ciprofloxacin and organic dyes by biosynthesized rGO–ZrO2 nanocomposites

Cited by 28 publications

References 51 publications

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe2O4/UiO-67

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe2O4/UiO-67

Photocatalytic Degradation of Maxilon Dye Pollutants using Nano‐Architecture Functional Materials: A Review

Prospective in vitro A431 cell line anticancer efficacy of zirconia nanoflakes derived from Enicostemma littorale aqueous extract

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Product

Resources

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Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67