Tuning particle morphology of mesoporous silica nanoparticles for adsorption of dyes from aqueous solution

Kachbouri, Sana; Mnasri, Najib; Elaloui, Elimame; Moussaoui, Younes

doi:10.1016/j.jscs.2017.08.005

Cited by 61 publications

(31 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption data have been fitted to Langmuir adsorption model to estimate the maximum adsorption capacity Qmax correlated to the complete monolayer coverage of the sorbent surface. The equation is given as: (8) By taking the reciprocal of Equation 8, the linear form is given by Equation 9: (9) where Qe (mg.g -1 ) is the amount of dye removed per gram of sorbent, Qmax (mg.g -1 ) is the maximum adsorption capacity, Ce (mg.g -1 ) is the dye concentration in the equilibrium solution, and b (L.mg -1 ) is the Langmuir constant related to the affinity of the binding sites. When the surface of the LDHs is saturated with the dye, Qm and b were determined from the linear plot of 1/Qe versus 1/Ce.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

“…Due to its symmetrical structure and stable properties, it is difficult to be oxidized and cracked. Recently, the removal of dye based toxic and carcinogenic pollutants from the industrial wastewater has been of interest in numerous studies [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Many advanced researches have been focused on different methods for dye removal from wastewaters such as biological degradation [10], photodegradation [11], coagulation [12], membrane filtration [12], reverse osmosis [14], adsorption [6,9], or the synergic treatment using different methods. Therefore, adsorption was the treatment economic solution and has been widely studied for a high-efficiency [15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Zn-M-CO3 Layered Double Hydroxides (M=Fe, Cr, or Al): Synthesis, Characterization, and Removal of Aqueous Indigo Carmine

Bouteraa

Saiah

Hamouda

et al. 2019

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

In this approach, Zn-M+3 layered double hydroxides (LDHs) with M+3 = Fe, Cr, or Al were synthesized by the co-precipitation method from the aqueous solution at a constant solution pH. The as-synthesized samples were characterized by XRD analysis, FTIR spectra, BET techniques and simultaneous thermogravimetric-differential scanning calorimetry (TGA/DSC). XRD analysis showed that Zn-Fe-CO3 had the greatest lattices parameters. BET surface area of Zn-Fe-CO3 was calculated as 52.24 m2.g-1 and was higher than Zn-Cr-CO3 and Zn-Al-CO3 with 46.70 and 49.99 m2.g-1, respectively. The FTIR spectra clearly confirmed the presence of carbonate anions in the structure of the LDHs. Adsorption experiments for Indigo Carmine (IC), as the main model organic pollutant in this study from aqueous solution onto synthetized samples were carried out in terms of solution pH, contact time and initial dye concentration. Experimental results indicate that the capacity of dye uptake augmented rapidly within the first 15, 40, and 55 minuts for Zn-Fe-CO3, Zn-Cr-CO3 and Zn-Al-CO3 respectively and then stayed practically the same regardless of the concentration. Adsorption kinetics studies revealed that the adsorption process followed pseudo-second order kinetics model instead of a pseudo-first-order model. The adsorption isotherm data follow the Langmuir equation in which parameters are calculated. The maximum Langmuir monolayer adsorption capacities were 94.87, 21.79, and 66.71 mg.g-1, respectively, for Zn-Fe-CO3, Zn-Cr-CO3, and Zn-Al-CO3. The adsorption capacities were slightly influenced by the pH variations from 5 to 10, showing the advantage of using these materials in water treatments in a wide pH range. Finally, the IC removal is proven by the presence of IC functional groups in IR spectra and thermograms. TGA/DSC of Zn-Fe-CO3 obtained after removal of IC indicate that the LDHs stabilizes IC and delays the combustion of adsorbed molecules. Copyright © 2020 BCREC Group. All rights reserved

show abstract

Section: Adsorption Isothermsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Zn-M-CO3 Layered Double Hydroxides (M=Fe, Cr, or Al): Synthesis, Characterization, and Removal of Aqueous Indigo Carmine

Bouteraa

Saiah

Hamouda

et al. 2019

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

show abstract

“…The silica nanoparticles have attracted signicant attention as nano adsorbent on account of their regular structural characteristics, larger surface area, tunable pore diameters, good thermal and chemical stabilities, ease of surface modication, selectivity of organic pollutants, economical regeneration and reusability. 7,8 Morphology controlled nanomaterials like hollow, mesoporous and tunable nanoporous silica nanoparticles play crucial role in drug delivery application. [9][10][11] Therefore netuning of particle size, surface functionalization and porous structure is very critical for environmental and medical applications.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15] Obviously, the nal porous structure, morphology, dimension and surface property of the silica nanoparticles are highly dependent on various reaction parameters such as solvent, temperature, pH, surfactant/silica molar ratio, cosurfactant and stirring rates. 8,16,17 Templating of silica nanoparticles with cationic surfactants, is very typical due to the electrostatic interaction between cationic head group of surfactants and negative surface of silica, further the silica self assembles around the template producing ordered channels. 18,19 The cationic surfactant CTAB acts as dispersing and pore templating agent; however, its concentration regulates the nal porous framework.…”

Section: Introductionmentioning

confidence: 99%

Tunable porous silica nanoparticles as a universal dye adsorbent

2019

View full text Add to dashboard Cite

show abstract

Efficient catalytic degradation of single and binary azo dyes by a novel triple nanocomposite of Mn₃O₄/Ag/SiO₂

Bakr

El‐Attar

Salem

2020

Applied Organom Chemis

View full text Add to dashboard Cite

The strategy of structurally integrating noble metal and metal oxides is expected to offer exceptional opportunities toward emerging functions of all. We report the creation of an efficient hetero-structured nanocatalyst consisting of Mn 3 O 4 core, SiO 2 shell impregnated with noble Ag nanoparticles. The triple nanocatalyst Mn 3 O 4 /Ag/SiO 2 was synthesized by using a facile three-step approach to disperse Ag nanoparticles between the surfaces of functionalized Mn 3 O 4 and SiO 2. The physicochemical structural characterization was performed by XRD and FTIR. The surface morphologies were observed by SEM and TEM. The EDX measurements confirmed the composition of the composite. The nanocomposite has been used as a catalyst for the degradation of Direct blue 78 in the presence of sodium borohydride (NaBH 4). It has a drastic catalytic effect as compared to Mn 3 O 4 /Ag and Mn 3 O 4. The rate constant of Direct blue 78 reduction followed the order: Mn 3 O 4 /Ag/SiO 2 (0.25166 min −1) > Mn 3 O 4 /Ag (0.07971 min −1) > Mn 3 O 4 (0.00947 min −1). The effects of different reaction conditions of the catalytic reaction have been determined. The catalytic activity of the as-synthesized nanocomposite was examined for the binary dyes system by incorporation of an additional dye (Sunset yellow). Its influence on the degradation rate and efficiency of Direct blue 78 was investigated. The nanocatalyst exhibited excellent catalytic activity towards the complete degradation of both the Direct blue 78 and Sunset yellow. The degradation percentage for these dyes reached 99.33 and 94.68%, respectively. The recovery and reusability of the Mn 3 O 4 /Ag/SiO 2 nanocomposite was studied in the reduction reaction of Direct blue 78. Five consecutive recovery reaction cycles were performed. They revealed high stability and constant efficiency of the catalyst for four cycles.

show abstract

Tuning particle morphology of mesoporous silica nanoparticles for adsorption of dyes from aqueous solution

Cited by 61 publications

References 55 publications

Zn-M-CO3 Layered Double Hydroxides (M=Fe, Cr, or Al): Synthesis, Characterization, and Removal of Aqueous Indigo Carmine

Zn-M-CO3 Layered Double Hydroxides (M=Fe, Cr, or Al): Synthesis, Characterization, and Removal of Aqueous Indigo Carmine

Tunable porous silica nanoparticles as a universal dye adsorbent

Efficient catalytic degradation of single and binary azo dyes by a novel triple nanocomposite of Mn₃O₄/Ag/SiO₂

Contact Info

Product

Resources

About

Tuning particle morphology of mesoporous silica nanoparticles for adsorption of dyes from aqueous solution

Cited by 61 publications

References 55 publications

Zn-M-CO3 Layered Double Hydroxides (M=Fe, Cr, or Al): Synthesis, Characterization, and Removal of Aqueous Indigo Carmine

Zn-M-CO3 Layered Double Hydroxides (M=Fe, Cr, or Al): Synthesis, Characterization, and Removal of Aqueous Indigo Carmine

Tunable porous silica nanoparticles as a universal dye adsorbent

Efficient catalytic degradation of single and binary azo dyes by a novel triple nanocomposite of Mn3O4/Ag/SiO2

Contact Info

Product

Resources

About

Efficient catalytic degradation of single and binary azo dyes by a novel triple nanocomposite of Mn₃O₄/Ag/SiO₂