Mesoporous carbons modified with lanthanum(III) chloride for methyl orange adsorption

Gościańska, Joanna; Marciniak, Magdalena; Pietrzak, Robert

doi:10.1016/j.cej.2014.03.012

Cited by 126 publications

(50 citation statements)

References 26 publications

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“…Mesoporous carbon of regular structure was obtained by the hard-template method, using KIT-6 silica material as a template and sucrose as a carbon precursor (Goscianska et al 2014(Goscianska et al , 2015a. The silica was subjected twice to impregnation with a sucrose solution; 1 g of KIT-6 was added to a solution obtained by dissolving 1.4 g of sucrose (Aldrich) and 0.14 g of H 2 SO 4 (Chempur, 98 %) in 6 ml of distilled water.…”

Section: Synthesis Of Mesoporous Carbonmentioning

confidence: 99%

“…For AO adsorption on the surface of functionalised mesoporous carbon samples, the values 1/n are similar and lower than one (Table 4). In order to estimate the influence of temperature on the adsorption process, the thermodynamic parameters that must be considered are the changes in standard enthalpy (DH 0 ), standard entropy (DS 0 ) and Gibbs free energy (DG 0 ) (Goscianska et al 2014). The values of DG 0 , DH 0 and DS 0 were computed using the following equations:…”

Section: Adsorption Studiesmentioning

confidence: 99%

“…To sum up, we can conclude that samples C KIT-6 -APS-30, C KIT-6 -APS-60 and C KIT-6 -APS-100, thanks to their specific physicochemical properties, make very efficient adsorbents of cationic dyes. The Langmuir and Freundlich isotherm models were used to interpret and evaluate the adsorption data from the experiments Ciesielczyk et al 2013Ciesielczyk et al , 2015bGoscianska et al 2014Goscianska et al , 2015aKlapiszewski et al 2015). The Langmuir adsorption isotherm is mathematically expressed as (Langmuir 1918):…”

Section: Adsorption Studiesmentioning

confidence: 99%

“…They show well-developed surface area, well-defined pore size, large pore volume and high thermal stability (Ryoo et al 1999(Ryoo et al , 2001Jun et al 2000). Therefore they have been widely used as supports for catalysts (Kim et al 2015), sensors (Feng et al 2007;Zhou et al 2007), elements of fuel cells (Lin et al 2009), in construction of bio-reactors (Hartmann 2005) and in adsorptive treatment of water and air (Goscianska et al 2014(Goscianska et al , 2015aTian et al 2011). The neutral and hydrophobic character of the ordered carbons prompted taking up attempts at modification of their surfaces by introduction of diverse functional groups.…”

Section: Introductionmentioning

confidence: 99%

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The effect of surface modification of mesoporous carbons on Auramine-O dye removal from water

2015

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Mesoporous carbon of regular structure was subjected to oxidation by ammonium persulfate at 30, 60 or 100°C. The mesostructure and pore evolution were characterised by XRD, TEM, and N 2 sorption techniques. The functional groups present on the surface of the carbon materials were identified by FTIR and thermogravimetric studies. It was established that the micropores and small mesopores could be blocked by the surface oxides attached under mild oxidation. High densities of surface oxygen complexes, especially carboxylic groups, were generated on the surface of mesoporous carbons. All materials obtained were tested for the removal of Auramine-O from aqueous solution. Adsorption experiments were carried out as batch studies at different contact time, pH and initial dye concentration. Removal of this cationic dye in basic solutions was more effective than in acidic solutions. The highest sorption capacity towards Auramine-O was obtained for the carbon sample oxidised by ammonium persulfate solution at 100°C. Fitting equilibrium data to Langmuir and Freundlich isotherms showed that Langmuir model was more suitable to describe the Auramine-O adsorption. The changes in standard enthalpy (DH 0 ), standard entropy (DS 0 ) and Gibbs free energy (DG 0 ) were analysed. Thermodynamic study showed that the adsorption of Auramine-O was a spontaneous and exothermic process.

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Section: Synthesis Of Mesoporous Carbonmentioning

confidence: 99%

Section: Adsorption Studiesmentioning

confidence: 99%

Section: Adsorption Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of surface modification of mesoporous carbons on Auramine-O dye removal from water

2015

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“…Emissions standards are becoming increasingly stringent for azo dyes pollution and they are must be removed to minimize the environmental impact. Various processes and techniques have been developed for azo dyes removal from aqueous solution including adsorption (Goscianska et al, 2014(Goscianska et al, , 2015aYagub et al, 2014), chemical coagulation (Zahrim et al, 2011), photodegradation (Davies et al, 2005) and biodegradation (Singh et al, 2015). Among them, adsorption onto porous materials is considered to be one of the most efficient techniques for azo dyes removal from aqueous solution (Goscianska et al, 2014(Goscianska et al, , 2015aYagub et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Removal of azo dye by a highly graphitized and heteroatom doped carbon derived from fish waste: Adsorption equilibrium and kinetics

Liu

Zhang

Liu

et al. 2016

Journal of Environmental Management

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a b s t r a c tA highly graphitized and heteroatom doped porous carbon was prepared from fish waste in the present study. The morphology and chemical composition of the resultant porous carbon were characterized by SEM-EDS, TEM, BET, XRD and Raman measurement. The prepared porous carbon was employed as an adsorbent for acid orange 7, a typical azo dye, removal from aqueous solution. The results showed that the porous carbon had ultrahigh surface area of 2146 m 2 /g, a high degree of graphitization structure and naturally doped with nitrogen and phosphorous. The maximum adsorption capacity of acid orange 7 reached 285.71 mg/g due to unique property of the prepared porous carbon. In addition, acid orange 7 adsorption onto the porous carbon well followed pseudo-second-order kinetics model and acid orange 7 diffusion in micropores was the potential rate controlling step.

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Photodegradation of methyl orange dye by ZnO loaded onto carbon xerogels composites

Farag¹,

Aboelenin

Fathy

2016

Asia-Pacific J Chem Eng

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The present paper studies the photocatalytic behavior of pure zinc oxide (ZnO) and ZnO loaded onto carbon xerogel as a substrate. These samples were prepared by a sol‐gel process in presence of either an ionic liquid or an alcohol such as 1‐ethyl‐3‐methylimidazolium trifluoromethylsulfonate (A) or isopropanol solvent (B) to produce ZnO‐CX‐A and ZnO‐CX‐B photocatalysts, respectively. Transmission electron microscopy and X‐ray diffraction proved that ZnO particles were prepared as nanoflakes‐like with amorphous phase. Fourier transform infrared spectroscopy showed that ZnO‐CX‐A has a variety of surface functional groups that accelerated the photocatalytic activity of composite. The photocatalytic activity of the prepared photocatalysts was evaluated using methyl orange (MO) azo dye as a model organic compound under visible light source. As a result of the photodegradation experiments, the MO dye was completely degraded by the prepared ZnO‐CX photocatalyst composites in 120 min rather than that performed using ZnO and CX photocatalysts. However, a 98% of the MO dye solution was degraded within 90 min over ZnO‐CX‐A. The separation and reusability runs of ZnO‐CX‐A photocatalyst showed that the catalyst has high photodegradation efficiencies reaching up to 90% in the fourth run and afterward decreased to 60% in the fifth reuse. © 2016 Curtin University of Technology and John Wiley & Sons, Ltd.

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Mesoporous carbons modified with lanthanum(III) chloride for methyl orange adsorption

Cited by 126 publications

References 26 publications

The effect of surface modification of mesoporous carbons on Auramine-O dye removal from water

The effect of surface modification of mesoporous carbons on Auramine-O dye removal from water

Removal of azo dye by a highly graphitized and heteroatom doped carbon derived from fish waste: Adsorption equilibrium and kinetics

Photodegradation of methyl orange dye by ZnO loaded onto carbon xerogels composites

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