Electrochemical, photocatalytic and sensor studies of clay/MgO nanoparticles

Mylarappa, M.; Raghavendra, N.; Surendra, B.S.; Kumara, K.N. Shravana; Kantharjau, S.

doi:10.1016/j.apsadv.2022.100268

Cited by 30 publications

(10 citation statements)

References 44 publications

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“…1 (b) reveals well-crystalline SiO2 NPs with sharp peaks, signifying the absence of impurities in the material at 550 ºC. The XRD pattern exhibits peaks corresponding to Miller planes (100), (001), (002), (011), (200), (012), ( 110), (013), and (020) [52]. In Fig.…”

Section: X-ray Diffraction Studies (Xrd)mentioning

confidence: 93%

“…The broad peak, centered at 3400 cm -1 , is attributed to the O-H stretching of the hydroxyl group [51]. The peak observed at 1100 cm -1 corresponds to the asymmetric stretching vibration of the Si-O-Si group [52]. Furthermore, the peak at 460 cm -1 is associated with the O-Si-O bending vibrational mode, and the peak at 800 cm -1 corresponds to the symmetric stretching of the Si-O-Si group [53].…”

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

“…The primary reactive species generated during the study of photo-degradation, namely superoxide radicals (O2 •-) and hydroxyl radicals (OH • ), play a pivotal role in breaking down organic pollutants into environmentally benign degradation byproducts, specifically carbon dioxide (CO2) and water (H2O) molecules, as illustrated in eq. ( 11) and ( 12) [89][90].…”

Section: Photocatalysis Studiesmentioning

confidence: 99%

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Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Swetha,

Venkata Lakshmi,

Mylarappa

et al. 2024

Silicon

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This study reports the extraction, characterization and development of reduced graphene oxide (rGO) doped silicon dioxide (SiO2) nanocomposite by simple reflux method. The nanocomposite was confirmed by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and UV-Visible spectroscopy techniques. The photocatalysis of malachite green (MG) was carried out for rGO, SiO2 and SiO2/rGO nanocomposite shows higher MG degradation about 97% compared to rGO, SiO2 and follows 1 st order kinetics. The antioxidant action of SiO2/rGO nanocomposite was assessed using DPPH shows a more antioxidant activity (98 %) and lower IC50 about 488.35 mg/mL. From electrochemical, the specific capacitance (Csp) value of SiO2/rGO (114 F/g) was exhibits higher compared to rGO (75 F/g) and SiO2 (96 F/g) respectively. The CV and sensor detection of bee pollen and cow urine samples were performed using nickel mesh electrode in 1M KCl in the potential range -1 to 1 V. The SiO2/rGO was employed to analyze bee pollen and cow urine concentrations and the detection limits were found to be 0.260 mM and 0.413 mM respectively. The prepared electrode plays an important role for improving sensor detection of bee pollen and cow urine samples.

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Section: X-ray Diffraction Studies (Xrd)mentioning

confidence: 93%

Section: Fourier Transform Infrared Spectroscopy (Ft-ir)mentioning

confidence: 99%

Section: Photocatalysis Studiesmentioning

confidence: 99%

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Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Swetha,

Venkata Lakshmi,

Mylarappa

et al. 2024

Silicon

Self Cite

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“…The phase formation and purity of the prepared nanocomposite were analyzed through powder X-ray diffraction (PXRD). Additionally, Scherrer's equation and the full width at half maximum (FWHM) were employed to determine the average crystal size of the nanoparticle by utilizing the Eq.2, [39],…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 99%

Antioxidant, Electrochemical, Photocatalysis and Sensor Studies of rGO Incorporated MgO Nanocomposite

et al. 2023

Preprint

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The main objective of this study is to develop the reduced graphene oxide (rGO) with magnesium oxide (MgO) nanoparticles. The obtained nanocomposite was characterized by using XRD, SEM and EDAX techniques. The developed rGO/MgO nanocomposite was utilized for antioxidant property. The Antioxidant activity of rGO, MgO and rGO/MgO nanocomposite were estimated using DPPH assay shows a greater antioxidant activity 83 % and lower IC50 about 2609.23 mg/mL for rGO/MgO nanocomposite. The cyclic voltammetry (CV) analysis was performed using carbon paste electrode in 1M KOH electrolyte. From CV studies, electrochemical reversibility at scan rate 10 mV/s (ER= 2.0810−6), proton diffusion co-efficient (D= 1.765 × 10−4) and capacitance (𝐶𝑠𝑝 = 173𝐹𝑔−1) has been improved significantly. The photodegradation of malachite green was carried out for rGO, MgO and rGO/MgO nanocomposite shows a greater degradation about 93% and follows 1st order kinetics. Further, sensing property of the synthesized material by utilizing Ascorbic acid (BS-A), Resorcinol (BS-R) and Uric acid (BS-U) exhibit a good sensing in the oxidation region.

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“…The MgO is an interesting metal oxide having specific properties, such as biodegradability, ease of being metabolized, nontoxicity, surface catalytic properties, and chemical and thermal stability. 25 Several techniques are available for the synthesis of MgO NPs, such as direct transformation, 32 hydrothermal method, 33 microwave radiation, 34 vapor–solid process, 35 laser ablation, 36 sol–gel, 37 solid-state interfacial diffusion reaction 38 and others. 39 Kachnar is phytochemical-rich (alkaloids, terpenoids, flavonoids, amino acid and carbohydrates) medicinal plant that has been used as an anti-diabetic, anti-dyslipidemia and nephroprotective agent.…”

Section: Introductionmentioning

confidence: 99%

Biogenic-magnesium oxide nanoparticles from Bauhinia variegata (Kachnar) flower extract: a sustainable electrochemical approach for vitamin-B₁₂ determination in real fruit juice and milk

Shaktawat,

Verma,

Singh

et al. 2024

Sustainable Food Technol.

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Electrochemical, photocatalytic and sensor studies of clay/MgO nanoparticles

Cited by 30 publications

References 44 publications

Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Antioxidant, Electrochemical, Photocatalysis and Sensor Studies of rGO Incorporated MgO Nanocomposite

Biogenic-magnesium oxide nanoparticles from Bauhinia variegata (Kachnar) flower extract: a sustainable electrochemical approach for vitamin-B₁₂ determination in real fruit juice and milk

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Electrochemical, photocatalytic and sensor studies of clay/MgO nanoparticles

Cited by 30 publications

References 44 publications

Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Development of SiO2/rGO from Rice Husk for Photocatalysis, Antioxidant, Electrochemical and Green Sensor Detection Studies

Antioxidant, Electrochemical, Photocatalysis and Sensor Studies of rGO Incorporated MgO Nanocomposite

Biogenic-magnesium oxide nanoparticles from Bauhinia variegata (Kachnar) flower extract: a sustainable electrochemical approach for vitamin-B12 determination in real fruit juice and milk

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Biogenic-magnesium oxide nanoparticles from Bauhinia variegata (Kachnar) flower extract: a sustainable electrochemical approach for vitamin-B₁₂ determination in real fruit juice and milk