Sunlight-assisted oxidative degradation of cefixime antibiotic from aqueous medium using TiO2/nitrogen doped holey graphene nanocomposite as a high performance photocatalyst

P, Shaniba C; Akbar, Mohammed Ali; Ramseena, Kuttikkattil; Raveendran, Poovathinthodiyil; Balasubramanian, N.; Ramakrishnan, Resmi M.

doi:10.1016/j.jece.2018.02.012

Cited by 36 publications

(17 citation statements)

References 40 publications

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“…To verify successful loading of CFM into the MSNPs, solid-state UV–visible diffuse reflectance spectroscopy (UV-DRS) spectra were compared with the individual CFM spectrum. As shown in Figure S2 (in the Supporting Information section), no indicative peak has been observed for the MSNPs (gray curve) in 288 nm, which is the specific wavelength of the neat CFM compound (red curve) while a distinguishable reflectance activity is observed for the CFM@SiO 2 particles (blue curve), indicating successful encapsulation of CFM into the MSNPs after several times rinsing of the particles. In other words, the maximum reflectance by the neat MSNPs and CFM is occurred at 220 and 288 nm, respectively, and according to the obtained curves, it is concluded that the CFM molecules have been suitably entrapped into the silica pores and their chemical structure remained intact after completion of the encapsulation process.…”

Section: Resultsmentioning

confidence: 99%

Cefixime-Containing Silica Nanoseeds Coated by a Hybrid PVA-Gold Network with a Cys–Arg Dipeptide Conjugation: Enhanced Antimicrobial and Drug Release Properties

et al. 2021

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Therapeutic nano-bioconjugates (TNBCs) as an advanced class of drug delivery systems have attracted much attention due to more efficacy than the individual medications. Hence, in this study, a novel anti-infection TNBC system is designed based on highly porous silica nanoparticles, gold nanoparticles (AuNPs), and hybridized polyvinyl alcohol (PVA) for the efficient delivery of cefixime (CFM). Furthermore, a conjugation of cysteine−arginine (CR) dipeptide is made onto the surfaces for the enhancement of cell adhesion. Concisely, the AuNPs incorporated inside the PVA network play the key role in the controlled release process triggered by localized surface plasmon resonance (LSPR) heating. The drug content of the CFM-containing cargo (named as CFM@SiO 2 /PVA/Au−CR) and related release profile have been precisely studied by the confirmed analytical methods. Eventually, confocal microscopy on the stained cells has revealed that the TNBC particles are capable of entering the Escherichia coli (E. coli) and Klebsiella pneumoniae (K. pneumoniae) bacterial cells better than the individual CFM. Also, optical density experiments (OD 600 ) have corroborated that the prepared CFM@SiO 2 /PVA/Au−CR TNBC includes a high antimicrobial effect on K. pneumoniae and E. coli cells with (93.0 ± 1.5) % and (86.8 ± 1.0) % success rates, respectively, whereas the same dosage of the individual CFM has shown a lower effect on the cell growth rate. Also, estimation of minimum inhibitory/ bactericidal concentrations (MIC/MBC) confirmed the enhanced antibacterial property of the CFM through the presented delivery method. Overall, this product is suggested to be clinically administrated instead of the individual CFM due to its high efficacy and containing lower dosage of the antibiotic drug.

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Section: Resultsmentioning

confidence: 99%

Cefixime-Containing Silica Nanoseeds Coated by a Hybrid PVA-Gold Network with a Cys–Arg Dipeptide Conjugation: Enhanced Antimicrobial and Drug Release Properties

et al. 2021

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“…Photocatalysis may be divided into two categories, ultraviolet (UV) active photocatalysis and solar/visible light active photocatalysis, which has become a preferred choice (Shaniba et al, 2020 ; Sujatha et al, 2020 ). Although UV photocatalysis generally has better treatment performance, as the intensity of UV is stronger than solar/visible light's (Sujatha et al, 2020 ), but due to the economics of solar/visible light photocatalysis, it is preferred over UV light photocatalysis and has been considered an environmentally friendly technology for pollutant removal.…”

Section: Introductionmentioning

confidence: 99%

Application of visible light active photocatalysis for water contaminants: A review

Sun

O’Connell

2022

Water Environment Research

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Organic water pollutants are ubiquitous in the natural environment arising from domestic products as well as current and legacy industrial processes. Many of these organic water pollutants are recalcitrant and only partially degraded using conventional water and wastewater treatment processes. In recent decades, visible light active photocatalyst has gained attention as a non‐conventional alternative for the removal of organic pollutants during water treatment, including industrial wastewater and drinking water treatment. This paper reviews the current state of research on the use of visible light active photocatalysts, their modified methods, efficacy, and pilot‐scale applications for the degradation of organic pollutants in water supplies and waste streams. Initially, the general mechanism of the visible light active photocatalyst is evaluated, followed by an overview of the major synthesis techniques. Because few of these photocatalysts are commercialized, particular attention was given to summarizing the different types of visible light active photocatalysts developed to the pilot‐scale stage for practical application and commercialization. The organic pollutant degradation ability of these visible light active photocatalysts was found to be considerable and in many cases comparable with existing and commercially available advanced oxidation processes. Finally, this review concludes with a summary of current achievements and challenges as well as possible directions for further research. Practitioner Points Visible light active photocatalysis is a promising advanced oxidation process (AOP) for the reduction of organic water pollutants. Various mechanisms of photocatalysis using visible light active materials are identified and discussed. Many recent photocatalysts are synthesized from renewable materials that are more sustainable for applications in the 21st century. Only a small number of pilot‐scale applications exist and these are outlined in this review.

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“…As persistent pollutants, antibiotics residues have become one of the most concerned environmental issues. Even if in low concentrations, with their accumulation in the human body, antibiotics can induce nephropathy, affect kidneys and other mutations [4] . Due to low biodegradability of antibiotics, it is difficult to remove them by conventional methods.…”

Section: Introductionmentioning

confidence: 99%

Eosin Y Covalently Modified on Graphene Oxide for Enhanced Photocatalytic Activity toward the Degradation of Antibiotic Cefaclor under Visible Light Irradiation

Luo

Chang²,

Huang³

et al. 2021

ChemistrySelect

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The covalent immobilization of eosin Y (EY) on graphene oxide (GO) was prepared and the obtained GO/EY composite can be used as a visible‐light‐driven photo‐catalyst for the degradation of cefaclor (CEC) antibiotics. The GO/EY composite exhibited much higher photocatalytic activity than pure GO and EY adsorbed GO. Using 2 mg L−1 of CEC at pH=7, 97 % degradation toward CEC could be achieved after irradiation time of 45 min. The enhanced photocatalytic activity for GO/EY composite can be attributed to the modification of GO by EY, which acted as a sensitizer for enhancing visible light absorption. The affecting factors of photocatalytic activities on the photocatalytic degradation of CEC were evaluated, including the effects of pH values, the photosensitized oxidation conditions and the reusability of the photocatalyst. Furthermore, the enhanced photocatalytic mechanism induced by visible‐light responsive GO/EY composite was proposed by reactive specie trapping experiments, and 1O2 and H2O2 were determined to be the main reactive oxygen species in the photocatalytic system. All these results demonstrated that organic dye sensitizer functionalized GO provided a nice candidate as a photocatalyst for the removal of CEC antibiotic from water under visible light irradiation.

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Sunlight-assisted oxidative degradation of cefixime antibiotic from aqueous medium using TiO2/nitrogen doped holey graphene nanocomposite as a high performance photocatalyst

Cited by 36 publications

References 40 publications

Cefixime-Containing Silica Nanoseeds Coated by a Hybrid PVA-Gold Network with a Cys–Arg Dipeptide Conjugation: Enhanced Antimicrobial and Drug Release Properties

Cefixime-Containing Silica Nanoseeds Coated by a Hybrid PVA-Gold Network with a Cys–Arg Dipeptide Conjugation: Enhanced Antimicrobial and Drug Release Properties

Application of visible light active photocatalysis for water contaminants: A review

Eosin Y Covalently Modified on Graphene Oxide for Enhanced Photocatalytic Activity toward the Degradation of Antibiotic Cefaclor under Visible Light Irradiation

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