Structure directed reversible adsorption of organic dye on mesoporous silica in aqueous solution

Wang, Shaobin; Li, Huiting

doi:10.1016/j.micromeso.2006.08.005

Cited by 121 publications

(73 citation statements)

References 22 publications

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“…The adsorption efficiency of various MPSs of some dyes is summarized in Table 2. According to the literature (Table 2), SBA-15 has a significantly higher adsorption capacity than MCM-48 due to its larger pore size (5.27 nm vs. 3.0 nm), which allows dye molecules to easily diffuse from surface to pores of SBA-15 (Wang and Li 2006;Juang et al 2007;Huang et al 2011b). In addition, the adsorption capacity and efficiency of MPSs depends on the functional group and class of dye.…”

Section: Dye Adsorption By Mesoporous Silicasmentioning

confidence: 99%

Review of the use of mesoporous silicas for removing dye from textile wastewater

Salahshoor

Shahbazi

2014

European Journal of Environmental Sciences

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The textile industry is a major user of dyes and hence an important source of water pollution, which poses a threat to aquatic as well as human life. Adsorption is a widely used technique for separating and removing dye from wastewater. Recently the use of mesoporous silica (MPSs) as an adsorbent in wastewater treatment has received considerable attention. MPSs are emerging as potential adsorbents because of their surface area, tunable and uniform pore structure, high pore volume, ordered pore structure, thermal and mechanical stability, and extraordinarily wide possibilities for functionalization to increase their adsorption capacity. In this paper the ability of MPSs to absorb dyes from aqueous solutions is reviewed. This article provides information on adsorption studies carried out under different operational conditions such as contact time, solution pH, temperature, agitation speed, etc. This review also summarizes and attempts to compare the equilibrium isotherm and kinetic models, and the thermodynamic studies that report the adsorption of dyes onto MPSs. The literature reviewed, indicate that SBA-MPSs have a higher adsorption capacity than MCM-MPSs and functionalized MPSs a better adsorption capacity than MPSs. It is evident from the literature that the potential of MPS based nano-sorbents being used for removing dyes from aqueous solution is very high. However, still more research work is needed on developing cost effective and more efficient MPS based nano-sorbents for use commercially.

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Section: Dye Adsorption By Mesoporous Silicasmentioning

confidence: 99%

Review of the use of mesoporous silicas for removing dye from textile wastewater

Salahshoor

Shahbazi

2014

European Journal of Environmental Sciences

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“…Previous studies about dye adsorbents focused on not only classic materials like activated carbons (Al-Degs et al 2008), but also several novel materials such as mesoporous carbons (Zhuang et al 2009;Teng et al 2012;Tripathi et al 2013), carbon nanotubes (Yan et al 2005;Wang et al 2012), titanium dioxides (Bourikas et al 2005), and mesoporous silicas (Wang and Li 2006;Huang et al 2011). The adsorption efficiency can be enhanced by chemical modification introducing activated organic groups [amino (Ho et al 2003;Donia et al 2009), pyridine (Yan et al 2006), surfactants (Faki et al 2008), polyelectrolytes (Joo et al 2009), etc.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Rhodamine B dye by biomimetic mesoporous SiO2 nanosheets

Shen

Zhang

et al. 2015

Clean Techn Environ Policy

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Efficient treatment of solutions and solid wastes containing Rhodamine B (RB), a common dye with potential carcinogenicity and sometimes used illegally in food industry, is of great importance because inappropriate treatment may lead to serious human and environmental risks. A novel nanomaterial, the mesoporous silica nanosheets prepared via electrospinning and calcination are applied to the adsorption of RB from aqueous solutions in this work. This sheet-like material is superior to classic powder adsorbents in recoverability, while good availability and stability favor its practical application. The effects of key parameters such as system pH, stirring rate, initial concentration, and contact time are studied. The adsorption isotherm type and the kinetic characteristic are analyzed. The results show that the mesoporous SiO 2 nanosheets are efficient in removing RB from aqueous phase, presenting great potential to become a practical dye adsorbent. Regeneration experiments show that this novel adsorbent can be activated by ethanol extraction process. This study provides the academic field with a successful application case of nanostructured materials, which can be applied to a wider range of dyes similar to RB in physicochemical properties, showing prosperous value in advanced environmental purification.

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“…Most of the reported adsorption studies on MCM-41 have concentrated on gases and only very few works have been reported for liquid systems [14]. A few investigations were found for the adsorption of MB on MCM-41 synthesized using high pressure autoclave hydrothermal reaction [14,[15][16][17]. However, to the best of the authors' knowledge, adsorption of MB on room temperature synthesized MCM-41 and its adsorption capability has not yet been investigated.…”

Section: Introductionmentioning

confidence: 99%

Investigation of equilibrium and kinetic parameters of methylene blue adsorption onto MCM-41

Monash

Pugazhenthi

2010

Korean J. Chem. Eng.

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Mesoporous MCM-41 was synthesized at room temperature using tetraethoxysilane (TEOS) with cetyltrimethylammonium bromide (CTAB) and employed as an effective adsorbent for the adsorption of methylene blue dye from aqueous solution. The as-synthesized MCM-41 was calcined at 250 and 550 o C to study the relation between the surface area and pore volume with surfactant removal. The synthesized MCM-41 was characterized using thermo gravimetric analysis (TGA), X-ray diffraction (XRD) patterns, nitrogen adsorption/desorption isotherms and Fourier transform infrared (FT-IR) spectroscopy. The MCM-41 calcined at 550 o C showed higher surface area (1,059 m 2 g −1 ) with pore volume of 0.89 ml g −1 and was used for the investigation of adsorption isotherms and kinetics. The experimental results indicated that the Freundlich and Redlich-Peterson models expressed the adsorption isotherm better than the Langmuir model. In addition, the influence of temperature and pH on adsorption was also investigated. The decrease in temperature or the increase in pH enhanced the adsorption of dye onto MCM-41. A maximum adsorption capacity of 1.5×10 −4 mol g −1 was obtained at 30 o C. The kinetic studies showed that the adsorption of dye on MCM-41 follows the pseudo-second-order kinetics.

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Structure directed reversible adsorption of organic dye on mesoporous silica in aqueous solution

Cited by 121 publications

References 22 publications

Review of the use of mesoporous silicas for removing dye from textile wastewater

Review of the use of mesoporous silicas for removing dye from textile wastewater

Adsorption of Rhodamine B dye by biomimetic mesoporous SiO2 nanosheets

Investigation of equilibrium and kinetic parameters of methylene blue adsorption onto MCM-41

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