High performance adsorbents based on hierarchically porous silica for purifying multicomponent wastewater

Shi, Wenping; Tao, Shengyang; Yu, Yingzhe; Wang, Yuchao; Ma, Wei

doi:10.1039/c1jm12142a

Cited by 79 publications

(44 citation statements)

References 52 publications

(50 reference statements)

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“…It is found that the adsorption capacities of the present ZnO flower-like architectures for AF and MG are significantly higher than that of adsorbents reported previously, and the adsorption capacity of the ZnO architectures for AF is the highest of all adsorbents for dyes. The adsorption capacity of the ZnO flower-like architectures for BF is higher than cellulose [55], porous silica [56], pmesoporous Si/C composite [57] and other adsorbents [58][59][60][61][62], only lower than mesoporous carbon [11]. These comparative results demonstrated that the present ZnO flower-like architectures are excellent adsorbents for triphenylmethane dyes offering great potential for the dye removal in wastewater.…”

Section: Adsorption Kineticsmentioning

confidence: 65%

“…Apparently, the adsorption capacities of AF, MG and BF are higher than that of AR and CR. For comparison all the adsorption capacities for AF [9,[40][41][42][43], MG [2,10,25,28,[44][45][46][47][48][49][50][51][52][53][54][55] and BF [11,[56][57][58][59][60][61][62] reported in literature onto various adsorbents are collected and summarized in Table 1. It is found that the adsorption capacities of the present ZnO flower-like architectures for AF and MG are significantly higher than that of adsorbents reported previously, and the adsorption capacity of the ZnO architectures for AF is the highest of all adsorbents for dyes.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

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Superior adsorption performance for triphenylmethane dyes on 3D architectures assembled by ZnO nanosheets as thin as ∼1.5 nm

Chen

Han

Zhao

et al. 2016

Journal of Hazardous Materials

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Section: Adsorption Kineticsmentioning

confidence: 65%

Section: Adsorption Kineticsmentioning

confidence: 99%

Superior adsorption performance for triphenylmethane dyes on 3D architectures assembled by ZnO nanosheets as thin as ∼1.5 nm

Chen

Han

Zhao

et al. 2016

Journal of Hazardous Materials

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“…To overcome the disadvantage of micropores, adsorbents with mesopores or even hierarchically porous structures have been designed (for example, bimodal macrostructure-mesostructure and multilevel porous structures). 31,32 The micropores and mesopores provide the adsorbent with a large specific surface area combined with a high density of functional groups, leading to a high adsorption capacity. Meanwhile, the presence of macropores and interconnected mesopores enables the fast diffusion of molecules into the internal pores (especially for large molecules), which greatly improves the adsorption rate.…”

Section: Introductionmentioning

confidence: 99%

Super-adsorbent material based on functional polymer particles with a multilevel porous structure

et al. 2016

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Porous polymer particles with multilevel structures consisting of submicron-sized hollow cavities and interconnected mesopores within the crosslinked shell were designed and prepared. An extremely high density of anhydride groups in the crosslinked shell can be conveniently converted into versatile functional groups for the adsorption of hazardous pollutants. As a proof of concept, we utilized carboxylate-functionalized hollow particles as a selective adsorbent for the removal of the basic dye methylene blue and found that these particles exhibited a very high adsorption capacity (1603 mg g − 1 ). Furthermore, the hollow structure, highly interconnected mesopores and rigid shell of the particles not only endow the adsorbent with fast adsorption/desorption rates but also facilitate their facile separation and easy regeneration. We believe that these porous polymer particles have great potential for applications in many fields, including as adsorbents, catalyst supports and matrices for the binding of sensitive materials.

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“…The hydrolyzable group reacts chemically with the silanol groups on the surfaces of silica to form stable siloxane bonds, whereas the organofunctional group provides desired surface characteristics or reactive groups [8,9]. Recently, silane coupling agents have been used by several researchers [10][11][12][13] to accommodate functional groups (amine, carboxylic, decyl, phenyl, and sulfonic acid) on the surfaces of mesoporous silica through surface modification for the removal of various types of dyes. For example, Anbia and Salehi [14] used ethylenediamine-, aminopropyl-, and pentaethylenehexaminefunctionalized SBA-3 mesoporous silica for the adsorption of acid dyes.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalization of mesoporous silica MCM-41 with 3-aminopropyltrimethoxysilane for dye removal: kinetic, equilibrium, and thermodynamic studies

Kang

Park

Kim

et al. 2016

Desalination and Water Treatment

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2015): Surface functionalization of mesoporous silica MCM-41 with 3-aminopropyltrimethoxysilane for dye removal: kinetic, equilibrium, and thermodynamic studies, Desalination and Water Treatment, A B S T R A C TMesoporous silica MCM-41 was synthesized and functionalized with a silane coupling agent (3-aminopropyltrimethoxysilane, APTMS) for the removal of Acid Blue 25 (AB25, anionic dye) and Methylene Blue (MB, cationic dye) from aqueous solutions as adsorbents. The synthesized (MCM-41) and functionalized (f-MCM-41) materials were characterized using field emission scanning electron microscopy, energy-dispersive X-ray spectrometry, transmission electron microscopy, particle size analysis, nitrogen gas adsorption-desorption analysis, X-ray diffraction spectrometry, and Fourier transform infrared spectrometry. The results indicate that the surface modification of MCM-41 with APTMS was successfully carried out. Batch experiments were performed to examine AB25 and MB removal by MCM-41 and f-MCM-41 under various experimental conditions. The results show that f-MCM-41 was a good adsorbent for anionic AB25, but not for cationic MB. This could be attributed to the presence of amine groups on the surfaces of f-MCM-41 from the APTMS modification. Conversely, MCM-41 was good for MB removal, but not for AB25 removal. AB25 removal in f-MCM-41 was sensitive to solution pH, with decreasing adsorption capacity as pH increased from 4.1 to 9.4. MB removal in MCM-41 was sensitive to solution pH in the opposite manner, with increasing adsorption capacity as pH increased from 4.1 to 10.3. Thermodynamic analysis showed that the adsorption of AB25 to f-MCM-41 and of MB to MCM-41 decreased with increasing temperature from 15 to 45˚C, indicating the exothermic nature of the sorption process. This study demonstrated that surface functionalization with silane coupling agents can help to make MCM-41 useful for the removal of various types of dyes.

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High performance adsorbents based on hierarchically porous silica for purifying multicomponent wastewater

Cited by 79 publications

References 52 publications

Superior adsorption performance for triphenylmethane dyes on 3D architectures assembled by ZnO nanosheets as thin as ∼1.5 nm

Superior adsorption performance for triphenylmethane dyes on 3D architectures assembled by ZnO nanosheets as thin as ∼1.5 nm

Super-adsorbent material based on functional polymer particles with a multilevel porous structure

Surface functionalization of mesoporous silica MCM-41 with 3-aminopropyltrimethoxysilane for dye removal: kinetic, equilibrium, and thermodynamic studies

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