Magnetically retrievable cysteine modified graphene oxide@nickelferrite@titanium dioxide photocatalyst for the effective degradation of chlorpyrifos from aqueous solutions

Anirudhan, T.S.; Manjusha, V.; Shainy, F.

doi:10.1016/j.eti.2021.101633

Cited by 19 publications

(4 citation statements)

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“…This intermediate reacts with amine groups of Cys and forms an amide bond, thus attaching it to the GO sheet and releasing dicyclohexylisourea . The attachment of Cys with a free −SH group is well documented in several reports, ,− whereas attachment via the sulfur group leading to the free −NH 2 group is also possible through other chemical methods. , Interestingly, Javidparvar et al schematically described both types of covalent attachment . Nevertheless, there are various other reduced forms of molecular structures reported such as GO sheets bridged by the Cys group, cross-linked structure through L-Cys, , and enhanced water dispersibility through thiol-ene click chemistry, which requires special chemical steps.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Singh,

Kar

2023

J. Phys. Chem. C

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The surface functionalization of graphene oxide (GO) with L-cysteine is a potent candidate for applications like enzymatic and non-enzymatic bio-sensing and biomedical purposes. Though numerous studies are available detailing efficient synthesis to applications, their interaction with the solvent and the factors affecting the stability should have been considered. Characterizing Cys-GO through Raman, Fourier-transform infrared, and dynamic light scattering spectroscopy quantified the chemical nature and revealed varying particle size distribution compared to GO. This indicates that Cys-GO sheets possibly exist in different ensemble states in the aqueous solution. To probe into its dynamic behavior, classical all-atom simulations have been employed. The computational results align with the experimental differences observed for precursor graphene, GO, and functionalized Cys-GO. The results demonstrate that the presence of a disulfide bond between Cys-GO sheets stabilizes the structural dynamicity compared to the individual or dimer sheet. The interaction with water molecules introduces variable deformation through the interplay between diffusive and Brownian motion of solvent over the sheets. The disulfide bond holds the sheets together, enabling more inter-sheet interactions and reducing random movement. The study provides deep physical insights into graphene-based materials, paving the way for the design of nanosheets with tunable characteristics for future nanocomposite development and sensing applications.

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Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Singh,

Kar

2023

J. Phys. Chem. C

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“…Nickel ferrite (NiFe 2 O 4 ) is a suitable candidate for biomedical applications as a substitute for iron oxides (Fe 3 O 4 or γ-Fe 2 O 3 ) due to its unique properties such as high bulk saturation magnetization and low magnetic anisotropy [2,3]. These nanoparticles are part of the inverse spinel family and have ferromagnetic properties with high saturation magnetization, mechanical hardness, and excellent chemical stability [26][27][28][29][30]. Nickel ferrite is a potential candidate for medical applications such as MRI contrast agents, drug delivery technology, color imaging, biotechnology, and biomedicine [31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

The thermo-therapeutic applications of Chitosan- CTAB coated Nickel Ferrite (NiFe₂O₄) magnetic nanoparticles

Al-Bairmani,

Roknabadi,

Behdani

et al. 2023

Phys. Scr.

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In this study, we used a hydrothermal-assisted co-precipitation method to synthesize the nickel ferrite (FN), Chitosan coated nickel ferrite (FN-Ch) and cetyltrimethylammonium bromide coated nickel ferrite (FN-CT) nanoparticles with small sizes and good biocompatibility. These nanoparticles were then evaluated for their potential use in magnetic hyperthermia. The particles were characterized using a variety of techniques, including X-ray diffraction, transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, Thermogravimetric Analysis (TGA), Inductively coupled plasma (ICP), magnetic characterization (VSM), zeta potential analysis, and in vivo studies (blood hemolysis and MTT test). The results of the X-ray diffraction analysis showed that the nanoparticles had a spinel phase of NiFe2O4. TEM analysis revealed that all three samples contained particles with nearly quadrilateral and hexagonal shapes. FT-IR spectroscopy confirmed the presence of Chitosan and CTAB coatings on the particle surface. Magnetic hysteresis curves showed that all of the synthesized samples exhibited superparamagnetic behavior at room temperature. The findings from the ICP analysis indicated that the FN-Ch and FN-CT nanoparticles contained iron and nickel, while no substantial quantities of other trace elements were identified in either of the samples. Blood hemolysis and MTT tests were used to assess the toxicity of the nanoparticles when in contact with red blood cells, fibroblast cells, and MCF7 cancer cells. Overall, our findings suggest that FN-Ch and FN-CT nanoparticles have potential for use in cancer diagnosis and treatment as part of a new nano-carrier system. Furthermore, combining hyperthermia with other treatment methods could enhance the effectiveness of cancer therapy.

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“…To overcome these challenges, researchers have been actively seeking highly efficient and environmentally friendly methods to degrade CPS in pesticide wastewater [20][21][22]. In recent years, photocatalysis technology has garnered significant attention due to its economy, mild reaction conditions, renewability, and versatility [23][24][25]. The catalyst surfaces could be activated by utilizing light energy, and then photocatalysts can generate highly reactive free radicals capable of rapidly degrading organic pollutants without producing toxic intermediates [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization of Dy2NdSbO7/Bi2WO6 Heterojunction Photocatalyst and the Application for the Photocatalytic Degradation of Chlorpyrifos under Visible Light Irradiation

Luan,

Hao,

Yao

et al. 2023

Crystals

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A groundbreaking photocatalytic nanomaterial, Dy2NdSbO7, was fabricated smoothly using the hydrothermal synthesis technique for the first time. Apart from that, Dy2NdSbO7/Bi2WO6 heterojunction photocatalyst (DBHP) was initially fabricated using the solvothermal fabrication technique. X-ray diffractometer, Fourier-transform infrared spectrometer, Raman spectrometer, UV-visible spectrophotometer, X-ray photoelectron spectrometer, inductively coupled plasma optical emission spectrometer, transmission electron microscope, and X-ray energy dispersive spectroscopy have been applied to evaluate and investigate the thetastructure, morphology, and physicochemical properties of synthesized samples. The results confirmed that the pyrochlore-type crystal structures of Dy2NdSbO7 belonged to the Fd3m space group with the cubic crystal system and the β-pyrochlore-type crystal structures of Bi2WO6 which belonged to the Pca21 space group with orthorhombic crystal system. Under visible light exposure for 155 min (VLP-155min) using DBHP in the capacity of the photocatalytic nanomaterial, the removal efficiency of chlorpyrifos (CPS) saturation reached 100%. Comparison of CPS removal efficiency after VLP-155min revealed that DBHP exhibited higher removal efficiency than Dy2NdSbO7, Bi2WO6, or N-doped TiO2 photocatalyst, with removal efficiency 1.15 times, 1.23 times, or 2.55 times higher, respectively. Furthermore, the oxidizing capability of free radicals was investigated using trapping agents. Results demonstrated that superoxide anions exhibited the strongest oxidative capability, followed by hydroxyl radicals and holes. The results presented in this study lay a robust groundwork for future investigations and advancements in the field of highly efficient heterostructure material. These findings have significant implications for the development of environmental remediation strategies and provide valuable insights into sustainable solutions for addressing CPS contamination.

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Magnetically retrievable cysteine modified graphene oxide@nickelferrite@titanium dioxide photocatalyst for the effective degradation of chlorpyrifos from aqueous solutions

Cited by 19 publications

References 50 publications

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

The thermo-therapeutic applications of Chitosan- CTAB coated Nickel Ferrite (NiFe₂O₄) magnetic nanoparticles

Synthesis, Characterization of Dy2NdSbO7/Bi2WO6 Heterojunction Photocatalyst and the Application for the Photocatalytic Degradation of Chlorpyrifos under Visible Light Irradiation

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Magnetically retrievable cysteine modified graphene oxide@nickelferrite@titanium dioxide photocatalyst for the effective degradation of chlorpyrifos from aqueous solutions

Cited by 19 publications

References 50 publications

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

Dynamic Properties of Graphene Oxide Functionalized with l-Cysteine

The thermo-therapeutic applications of Chitosan- CTAB coated Nickel Ferrite (NiFe2O4) magnetic nanoparticles

Synthesis, Characterization of Dy2NdSbO7/Bi2WO6 Heterojunction Photocatalyst and the Application for the Photocatalytic Degradation of Chlorpyrifos under Visible Light Irradiation

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The thermo-therapeutic applications of Chitosan- CTAB coated Nickel Ferrite (NiFe₂O₄) magnetic nanoparticles