Effect of using polyvinyl alcohol and polyvinyl pyrrolidone in the synthesis of octahedral molecular sieves

Garces, Luis J.; Hincapie, Beatriz; Makwana, Vinit D.; Laubernds, Kate; Sacco, Albert; Suib, Steven L.

doi:10.1016/s1387-1811(03)00424-4

Cited by 15 publications

(14 citation statements)

References 21 publications

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“…The XRD pattern of synthesized nanozeolite is shown in figure 1. The figure shows the characteristic lines of nanozeolite L with good agreement to the XRD pattern of nanozeolite L in the literature [43]. Figure 2 shows the FT-IR spectrum of the sample in the range of 400-1300 cm −1 .…”

Section: Characterization Of Nanozeolite Lsupporting

confidence: 84%

Sensitive amperometric determination of hydrazine using a carbon paste electrode modified with silver-doped zeolite L nanoparticles

2017

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Silver-loaded nanozeolite-L-modified carbon paste electrode (Ag/L-CPE) was used as a novel sensing platform for enhanced electrocatalytic oxidation and determination of hydrazine. Zeolite L nanoparticles were synthesized via hydrothermal approach and then characterized using various techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electronic microscopy (SEM) and Brunauer-Emmett-Teller (BET). Silver-exchanged nanozeolite L (Ag/L) was prepared and mixed with carbon paste to prepare the modified electrode. Cyclic voltammetry studies revealed the high performance of Ag/L-CPE for electrocatalytic oxidation of hydrazine. Two linear ranges were detected in the amperometric detection of hydrazine. The first range was from 10 μM to 0.4 mM with sensitivity of 103.13 μA mM −1 and the second one was from 0.4 to 4 mM with sensitivity of 58.131 μA mM −1. The response time and detection limit (S/N = 3) of this sensor were determined to be 2 s and 1.5 μM, respectively. The unique porous structure of nanozeolite L offers a promising catalyst support candidate for efficient electrochemical sensing of hydrazine. The sensor exhibited appreciable repeatability, reproducibility and stability, and was able to detect hydrazine in the presence of even 500-fold excess concentrations of interfering species. Also, the sensor was used to determine hydrazine concentration in water samples with satisfactory results.

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Section: Characterization Of Nanozeolite Lsupporting

confidence: 84%

Sensitive amperometric determination of hydrazine using a carbon paste electrode modified with silver-doped zeolite L nanoparticles

2017

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“…However, higher concentration of hydroxyl groups presents in PVA when compared to amide groups in PVP. 26 Moreover, aqueous solution of PVA is more viscous than that of PVP at the same polymer concentration. These result in reducing CuNPs size growth or aggregation in PVA.…”

Section: 25mentioning

confidence: 99%

Ultrafine Copper Nanoparticles Exhibiting a Powerful Antifungal/Killing Activity Against Corticium Salmonicolor

Cao¹,

Nguyen²,

Vo³

et al. 2014

Bulletin of the Korean Chemical Society

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In this paper ultrafine copper nanoparticles (CuNPs) were prepared from copper salt via chemical reduction method with sodium citrate dispersant and polyvinylalcol (PVA) capping polymer. The colloidal CuNPs were characterized by using UV-Visible spectroscopy, Transmission Electron Microscopy (TEM), and X-ray Diffraction (XRD) techniques. Our obtained results indicated that the CuNPs were produced ranging from 2 to 4 nm in diameter. The colloidal solution at 7 ppm of CuNPs exhibited a powerful antifungal activity against Corticium salmonicolor (C. Salmonicolor). Fungal killing assays showed colloid solutions containing 10 ppm of CuNPs killed entirely the cultured fungus. A highly killing activity against the fungus was also performed when the CuNPs were sprayed on pink disease-infected rubber trees. These positive results may offer a great potential to produce CuNPs-based eco-fungicide for pink disease.

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“…However, PVA has higher concentration of hydroxyl groups present as compared to amide groups in PVP. [31] These results show that aqueous solutions of PVA are more viscous than those of PVP at the same polymer concentration. This resulted in reducing CuNP size growth or aggregation in PVA.…”

Section: Influence Of Temperature On Cunp Size Distribution In the Prmentioning

confidence: 81%

“…This resulted in reducing CuNP size growth or aggregation in PVA. [31] Besides several investigations presented in this paper, stability of the CuNP colloidal solutions was also assessed. The colloidal solution had not changed colour after 1 month without storing in any inner gas environment (data not shown here).…”

Section: Influence Of Temperature On Cunp Size Distribution In the Prmentioning

confidence: 99%

Synergistic effect of citrate dispersant and capping polymers on controlling size growth of ultrafine copper nanoparticles

Cao

Trân

Nguyen

2013

Journal of Experimental Nanoscience

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In this paper, we studied the synergistic effect of sodium citrate dispersant and polyvinylpyrrolidone or polyvinylalcol capping polymer on controlling the size of copper nanoparticles (CuNPs) that were prepared by the chemical reduction method. The CuNPs were characterised by using ultraviolet-visible (UV-Vis) spectroscopy, transmission electron microscopy, and X-ray diffraction techniques. The size of the nanoparticles could be predicted via their UV-Vis absorbance. In the presence of capping polymers, the size of CuNPs was significantly changed, ranging from 2 AE 1 to 20 AE 7 nm with and without sodium citrate dispersant, respectively. Moreover, surface plasmon resonance of ultrafine CuNPs (2 nm in diameter) could be observed in the short wavelength region by using UV-Vis spectra. Our finding, could offer a new synthetic approach to the production of highly stable, small-sized CuNPs.

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Effect of using polyvinyl alcohol and polyvinyl pyrrolidone in the synthesis of octahedral molecular sieves

Cited by 15 publications

References 21 publications

Sensitive amperometric determination of hydrazine using a carbon paste electrode modified with silver-doped zeolite L nanoparticles

Sensitive amperometric determination of hydrazine using a carbon paste electrode modified with silver-doped zeolite L nanoparticles

Ultrafine Copper Nanoparticles Exhibiting a Powerful Antifungal/Killing Activity Against Corticium Salmonicolor

Synergistic effect of citrate dispersant and capping polymers on controlling size growth of ultrafine copper nanoparticles

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