Preparation and Characterization of Nano Gold Supported over Montmorillonite Clays

Suraja, P. V.; Binitha, N. N.; Yaakob, Zahira; Silija, P. P.

doi:10.1088/1757-899x/17/1/012019

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…The inset of Figure 3(a) indicated that pure BiVO 4 had no absorption in the region of 550-800 nm; however, all Au/BiVO 4 samples showed enhanced absorption in this region upon increasing Au content. The absorption in this range can be ascribed to the surface plasmon resonance (SPR) of Au nanoparticles which is attributed to a collective of conduction electrons in response to optical excitation [30]. In addition, the SPR peak was slightly shifted to longer wavelength as increasing Au content, possibly due to an increase of Au particle size [31].…”

Section: Optical Absorptionmentioning

confidence: 99%

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO₄Photocatalyst

Pingmuang

Wetchakun

Ounnunkad

et al. 2013

International Journal of Photoenergy

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Au/BiVO 4 visible-light-driven photocatalysts were synthesized by coprecipitation method in the presence of sodium dodecyl benzene sulfonate (SDBS) as a dispersant. Physical characterization of the obtained materials was carried out by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), UV-Vis diffuse reflectance spectroscopy (DRS) and Brunauer, and Emmett and Teller (BET) specific surface area measurement. Photocatalytic performances of the asprepared Au/BiVO 4 have also been evaluated via mineralizations of oxalic acid and malonic acid under visible light irradiation. XRD and SEM results indicated that Au/BiVO 4 photocatalysts were of almost spherical particles with scheelite-monoclinic phase. Photocatalytic results showed that all Au/BiVO 4 samples exhibited higher oxalic acid mineralization rate than that of pure BiVO 4 , probably due to a decrease of BiVO 4 band gap energy and the presence of surface plasmon absorption upon loading BiVO 4 with Au as evidenced from UV-Vis DRS results. The nominal Au loading amount of 0.25 mol% provided the highest pseudo-first-order rate constant of 0.0487 min −1 and 0.0082 min −1 for degradations of oxalic acid (C 2 ) and malonic acid (C 3 ), respectively. By considering structures of the two acids, lower pseudo-first-order rate constantly obtained in the case of malonic acid degradation was likely due to an increased complexity of the degradation mechanism of the longer chain acid.

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Section: Optical Absorptionmentioning

confidence: 99%

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO₄Photocatalyst

Pingmuang

Wetchakun

Ounnunkad

et al. 2013

International Journal of Photoenergy

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Fabrication of nanofibrous vinyl brushes of clay minerals as an active support for gold nanoparticles for catalytic reduction

2023

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Clay mineral catalysts

Dutta

2018

Developments in Clay Science

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Preparation and Characterization of Nano Gold Supported over Montmorillonite Clays

Cited by 4 publications

References 7 publications

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO₄Photocatalyst

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO₄Photocatalyst

Fabrication of nanofibrous vinyl brushes of clay minerals as an active support for gold nanoparticles for catalytic reduction

Clay mineral catalysts

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Preparation and Characterization of Nano Gold Supported over Montmorillonite Clays

Cited by 4 publications

References 7 publications

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO4Photocatalyst

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO4Photocatalyst

Fabrication of nanofibrous vinyl brushes of clay minerals as an active support for gold nanoparticles for catalytic reduction

Clay mineral catalysts

Contact Info

Product

Resources

About

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO₄Photocatalyst

Photocatalytic Mineralization of Organic Acids over Visible-Light-Driven Au/BiVO₄Photocatalyst