Tailoring the structural, morphological, optical, thermal and dielectric characteristics of ZnO nanoparticles using starch as a capping agent

Sagadevan, Suresh; Vennila, Selvaraj; Lett, J. Anita; Marlinda, Ab Rahman; Hamizi, Nor Aliya; Johan, Mohd Rafie

doi:10.1016/j.rinp.2019.102543

Cited by 32 publications

(11 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results showed that the initial mass reduction (−2.8 mg) occurred at 30–350 °C due to the desorption or material moisture removal process . The second mass reduction (−1 mg) occurred at 350–600 °C, when most of the organic groups of urea compounds as N dopants in ZnO crystals underwent decomposition . The last mass reduction (−1 mg) occurred at 600–850 °C, in which the decrease was thought to be derived from the decomposition of ZnO .…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue Using N-Doped ZnO/Carbon Dot (N-ZnO/CD) Nanocomposites Derived from Organic Soybean

et al. 2023

View full text Add to dashboard Cite

This study reports on successful synthesis of carbon dots (CDs), nitrogen-doped zinc oxide (N-ZnO), and N-ZnO/CD nanocomposites as photocatalysts for degradation of methylene blue. The first part was the synthesis of CDs utilizing a precursor from soybean and ethylenediamine as a dopant by a hydrothermal method. The second part was the synthesis of N-ZnO with urea as the nitrogen dopant carried out by a calcination method in a furnace at 500 °C for 2 h in an N2 atmosphere (5 °C min–1). The third part was the synthesis of N-ZnO/CD nanocomposites. The characteristics of CDs, N-ZnO, and N-ZnO/CD nanocomposites were analyzed through Fourier transform infrared (FTIR), UV–vis absorbance, photoluminescence (PL), high-resolution transmission electron microscopy (HR-TEM), X-ray diffraction (XRD), thermal gravimetry analysis (TGA), field-emission scanning electron microscopy energy-dispersive spectroscopy (FESEM EDS), X-ray photoelectron spectroscopy (XPS), and Brunauer–Emmett–Teller (BET) analysis. Based on the HR-TEM analysis, the CDs had a spherical shape with an average particle size of 4.249 nm. Meanwhile, based on the XRD and HR-TEM characterization, the N-ZnO and N-ZnO/CD nanocomposites have wurtzite hexagonal structures. The materials of N-ZnO and N-ZnO/CD show increased adsorption in the visible light region and low energy gap E g. The E g values of N-ZnO and N-ZnO/CDs were found to be 2.95 and 2.81 eV, respectively, whereas the surface area (S BET) values 3.827 m2 g–1 (N-ZnO) and 3.757 m2 g–1(N-ZnO/CDs) belonged to the microporous structure. In the last part, the photocatalysts of CDs, N-ZnO, and N-ZnO/CD nanocomposites were used for degradation of MB (10 ppm) under UV-B light irradiation pH = 7.04 (neutral) for 60 min at room temperature. The N-ZnO/CD nanocomposites showed a photodegradation efficiency of 83.4% with a kinetic rate of 0.0299 min–1 higher than N-ZnO and CDs. The XRD analysis and FESEM EDS of the N-ZnO/CDs before and after three cycles confirm the stability of the photocatalyst with an MB degradation of 58.2%. These results have clearly shown that the N-ZnO/CD nanocomposites could be used as an ideal photocatalytic material for the decolorization of organic compounds in wastewater.

show abstract

Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue Using N-Doped ZnO/Carbon Dot (N-ZnO/CD) Nanocomposites Derived from Organic Soybean

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Hence, TGA analysis showed that total weight loss of 8.13% and 6.63% for ZnO and Cr-ZnO nanoparticles, respectively. Thus, Cr-ZnO nanoparticles are more thermally stable than ZnO [59].…”

Section: Thermal Property Analysismentioning

confidence: 99%

Structural and thermal properties of pure and chromium doped zinc oxide nanoparticles

et al. 2021

View full text Add to dashboard Cite

Pure ZnO and Cr-doped ZnO nanoparticles have been synthesized via a facile chemical co-precipitation route and their structural, thermal characteristics were discussed systematically. In the experimental producer, the doping concentration has varied the range, 0.05–0.1 M, while calcined at 600 °C. The influence of Cr-doping on the physical characteristics of ZnO nanoparticles was investigated and addressed. As-prepared samples were analyzed via XRD, FTIR, TGA/DTA, BET, and ICP-MS. XRD analysis shows that ZnO and Cr doped ZnO nanoparticles with average particle sizes between 23 and 39 nm were successfully developed with hexagonal wurtzite structure. The FTIR spectroscopy analysis confirms the existence of chromium in the doped ZnO nanoparticles and the formation of ZnO. The TGA/DTA analysis shows that Cr–ZnO nanoparticles are more thermally stable than ZnO nanoparticles. Moreover, the dopant concentration has been analyzed via ICP-MS and showed a good agreement with the expected chromium concentration. The BET surface area measurement shows that 176.25 m2/g and 287.17 m2/g for un-doped ZnO, and 0.1 M Cr-doped ZnO nanoparticles, respectively. Hence, doping of Cr enhances the surface area and thermal stability. Thus, Cr–ZnO nanoparticles show good thermal stability, and high surface area, which is an excellent characteristices of nanomaterials. Graphic abstract

show abstract

“…IL-ZnONPs-f-MWCNTs sample reveals two decomposition stages; the first weight loss occurs between 30°C-140°C, due to the elimination of moisture and the other solvents. In the second step, the mass loss ends at about 380°C which is due to the decomposition of f-MWCNTs [32,33]. The f-MWCNTs sample exhibited a major weight loss below 500°C due to the functional groups released.…”

Section: Full Papermentioning

confidence: 99%

Ionic Liquid and f‐MWCNTs Fabricated Glassy Carbon Electrode for Determination of Amygdalin in Apple Seeds

Chokkareddy

2020

Electroanalysis

View full text Add to dashboard Cite

This work proposes a novel electrochemical sensor based on functionalised multiwalled carbon nanotubes (f-MWCNTs), zinc oxide nanoparticles (ZnONPs), and (methyltrioctylammonium chloride ionic liquid (IL)) fabricated glassy carbon electrode (GCE), for the determination of amygdalin (AMY) in apple seeds. X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), Fourier-transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM), Thermogravimetric analysis (TGA) as well as electrochemical impedance spectroscopy (EIS) techniques were used to characterize the synthesized ZnONPs and its nanocomposite. EIS and differential Pulse Voltammetry (DPV) was utilized to investigate the electrochemical behavior of AMY on the IL-ZnONPs-f-MWCNTs nanocomposite modified GCE. The linear range response is obtained from 0.012-6 μM for AMY determination under optimized experimental conditions, and the limit of detection (LOD) values were found to be 0.012 μM. The novel method developed was successfully used to determine AMY in spiked apple seed samples with satisfactory results.

show abstract

Tailoring the structural, morphological, optical, thermal and dielectric characteristics of ZnO nanoparticles using starch as a capping agent

Cited by 32 publications

References 22 publications

Photocatalytic Degradation of Methylene Blue Using N-Doped ZnO/Carbon Dot (N-ZnO/CD) Nanocomposites Derived from Organic Soybean

Photocatalytic Degradation of Methylene Blue Using N-Doped ZnO/Carbon Dot (N-ZnO/CD) Nanocomposites Derived from Organic Soybean

Structural and thermal properties of pure and chromium doped zinc oxide nanoparticles

Ionic Liquid and f‐MWCNTs Fabricated Glassy Carbon Electrode for Determination of Amygdalin in Apple Seeds

Contact Info

Product

Resources

About