Langmuir–Hinshelwood kinetics – A theoretical study

Kumar, K. Vasanth; Porkodi, K.; Rocha, Fernando

doi:10.1016/j.catcom.2007.05.019

Cited by 684 publications

(254 citation statements)

References 12 publications

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“…The Langmuir-Hinshelwood kinetic model developed for quantitative analysis of gaseous-solid reactions is now the most commonly used method of expressing the heterogeneous catalytic process. This is simplified to a first-order reaction and given as follows [40]:…”

Section: Photocatalytic Degradation Of Alkylphenols By Tio 2 /C N Tabmentioning

confidence: 99%

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Sakai

Loves

Okada

et al. 2013

Journal of Hazardous Materials

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We report here on the removal of alkylphenols (phenol, 4-n-propylphenol, 4-nheptylphenol and 4-nonylphenol) dissolved in water using the composite particles of nanocrystalline titania and alkyltrimethylammonium bromide (C n H 2n+1 N(CH 3 ) 3 Br, C n TAB; n = 12, 14, 16 and 18) (named as TiO 2 /C n TAB Nanoskeleton) as adsorbents and photocatalysts. In particular, the adsorption of alkylphenols onto TiO 2 /C n TAB Nanoskeleton in water was investigated in terms of hydrophobic interaction between alkylphenols and C n TAB, surface area, pore structure and crystal size of TiO 2 /C n TAB Nanoskeleton.We revealed that C n TAB incorporated in the TiO 2 /C n TAB Nanoskeleton promotes the adsorption of alkylphenols onto TiO 2 /C n TAB Nanoskeleton due to the hydrophobic interaction between alkylphenols and C n TAB.On the other hand, the surface area, pore structure and crystal size of TiO 2 /C n TAB Nanoskeleton did not affect the adsorption of alkylphenols onto TiO 2 /C n TAB Nanoskeleton. We also found that the alkylphenols dissolved in water were completely removed by the combination of adsorption and photocatalytic degradation by the TiO 2 /C n TAB Nanoskeleton under UV irradiation. These results prove that the TiO 2 /C n TAB Nanoskeleton acts as in tandem an adsorbent and a photocatalyst for removal of alkylphenols dissolved in water.

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Section: Photocatalytic Degradation Of Alkylphenols By Tio 2 /C N Tabmentioning

confidence: 99%

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Sakai

Loves

Okada

et al. 2013

Journal of Hazardous Materials

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“…The reactions kinetics for photocatalysis can be described on the bases of Langmuir-Hinshelwood model 56 as presented in Figure 10 loading has the highest apparent rate constant (an order of magnitude higher than that of bare SiO2 particles) and therefore it exhibits excellent photocatalytic activity. Hence, it can be concluded that Sz nanocomposite is photocatalytically most active than pristine SiO2 and graphene/SiO2 nanocomposites with low graphene content for the degradation of MO.…”

Section: Samplementioning

confidence: 99%

Graphene/SiO2 nanocomposites: The enhancement of photocatalytic and biomedical activity of SiO2 nanoparticles by graphene

Arshad

Iqbal

Mansoor

et al. 2017

Journal of Applied Physics

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ABSTRACT:The exceptional conducting nature of graphene makes it a viable candidate for enhancing the effectiveness of photocatalytic and biomedical nanomaterials. Herein, the immobilization of monodispersed silicon dioxide (SiO2) nanoparticles on multiple graphene layers is demonstrated for intercalation of graphene nanoplatelets (GNPs). Interestingly, the loading of graphene nanoplatelets with SiO2 nanoparticles enhances the photocatalytic efficiency from 46% to 99%. For biomedical applications, it is found that 75% of Gram positive and 50% of Gram negative bacteria have been killed, hence bacterial proliferation is significantly restricted. Further, the cytotoxicity study reveals that the synthesised nanocomposites are non-toxic for both normal (HCEC) and cancerous (MCF-7, HEp-2) cell lines which signifies their potential as carriers for drug delivery. The prepared nanocomposites with controlled amount of carbon in the form of graphene can be employed for photocatalysis based waste water remediation, biomedicine and nano drug delivery.

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“…Langmuir-Hinshelwood kinetics model was used to determine the equilibrium constant using the Eq. (5) [25] [ln( / ( − )] + = /( − ) (5) where Co is the initial concentration of iron, Ca is the residual concentration of iron, K is the equilibrium constant, and k 1 is reaction rate constants. Based on the linearity data in Table 1, the adsorption of Iron onto EDVB followed the pattern of the kinetics pseudo second-order.…”

Section: Resultsmentioning

confidence: 99%

Adsorption Characteristic of Iron Onto Poly[eugenol-Co-(Divinyl Benzene)] From Aqueous Solution

Silvianti¹,

Siswanta²,

Aprilita³

et al. 2017

J. Nat.

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Langmuir–Hinshelwood kinetics – A theoretical study

Cited by 684 publications

References 12 publications

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Titania/C TAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water

Graphene/SiO2 nanocomposites: The enhancement of photocatalytic and biomedical activity of SiO2 nanoparticles by graphene

Adsorption Characteristic of Iron Onto Poly[eugenol-Co-(Divinyl Benzene)] From Aqueous Solution

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