Chromium (VI) removal from water by means of adsorption-reduction at the surface of amino-functionalized MCM-41 sorbents

Fellenz, Nicolás Antonio; Pérez‐Alonso, Francisco J.; Martín, Pedro Luis; García-Fierro, José Luis; Bengoa, J. F.; Marchetti, Sérgio Gustavo; Rojas, Sergio

doi:10.1016/j.micromeso.2016.10.012

Cited by 99 publications

(67 citation statements)

References 43 publications

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“…For the two samples, the bands at around 459 and 807 cm –1 are caused by the symmetric stretching vibration of the Si–O–Si band, and the clear adsorption peak at 1080 cm –1 is attributed to the asymmetric stretching vibrations of the Si–O–Si band . The peak at 1640 cm –1 is attributed to surface silanol group . For FDU‐12‐NH 2 , the new broad bands at around 1490 and 1560 cm −1 can be assigned to the N–H bond of amino group,, suggesting that the silane coupling agent has reacted with the hydroxyl groups of FDU‐12.…”

Section: Resultsmentioning

confidence: 99%

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

Yang

Zhang

et al. 2019

ChemistrySelect

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Amino-group functionalized FDU-12 material (FDU-12-NH 2 ) was utilized as an efficient and recyclable catalyst for the Knoevenagel condensation to afford α, β-unsaturated compounds. The catalysts were characterized by nitrogen adsorption, X-ray diffraction, Fourier transform infrared spectrophotometer, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis, which showed that FDU-12-NH 2 was successfully prepared using the post-synthesis-grafting method. Compared with the magnetic stirring method, the ultrasound-assisted method could improve the Knoevenagel reaction significantly in this work. In addition, the catalyst exhibited the highest catalytic activity in the mixed solvent of ethanol and water with volume ratio of 3 : 1 due to the solvent effect. Various substrates could convert to their desired products with high yields in short time; what's more, it could be used for four times without significant decrease of the activity. This work reveals that FDU-12-NH 2 is a promising heterogeneous catalyst for the synthesis of α, β-unsaturated compounds.

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Section: Resultsmentioning

confidence: 99%

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

Yang

Zhang

et al. 2019

ChemistrySelect

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“…Though they are of varied chemical nature but have similarities on detrimental effects posed to the surrounding. Over the decades various class of metal oxide, mesoporous silica (SBA‐15, MCM‐41),, carbonaceous (graphene oxide (GO), reduced graphene oxide (rGO), carbon nanotubes (CNT)), layered double hydroxides (LDHs), metal organic frameworks (MOFs) and porous hexagonal boron nitride (h‐BN) based advanced nano adsorbents have been developed for the removal of the same. Off‐late, white graphene has attracted considerable attention from the scientific community towards adsorption‐based removal, owing to its highly porous structure which accounts for its unusually high surface area, pore volume and “special multimodal microporous/mesoporous structure” and diverse nano architectural morphologies .…”

Section: Adsorptionmentioning

confidence: 99%

A Review on the Synergistic Features of Hexagonal Boron Nitride (White Graphene) as Adsorbent‐Photo Active Nanomaterial

Mishra

Saravanan

2018

ChemistrySelect

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Hexagonal boron nitride, known as white graphene has attracted the water industry as a replacement to both classical bulk and nano‐adsorbent. Its structural resemblance to graphene, resistance to corrosion, chemical oxidation, high thermal stability has attracted the focus of the researchers. On top of that its intrinsic material properties such as porosity, surface functional groups, band gap, etc. can be engineered to complement the real‐time applications. All the aforementioned strengthened their potential candidature as alternative nano‐adsorbent as well as energy material. The distinct characteristics like high selectivity, affinity, and the polar nature are auxiliary benefits for the adsorptive process. Further, the higher thermal stability of the material paves facile and ease regeneration. However, the wider band position limits its attributes as energy materials and was resolved by simple doping with suitable impurities. The authors drafted review, learning the vacuum that consolidates the mechanistic features like the development of nanoarchitecture, porosity, and bandgap engineering of the said material. Hence, the present review unambiguously discusses the role of various governing parameters for the development of novel porous Hexagonal boron nitride, along with characteristics of typical energy materials.

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“…In Fellenz's study, the amino-functionalized MCM-41 sorbents exhibited both adsorption and reduction ability. The partially reduction theory was proposed that a proton released from the solid surface to the solution, afterwards, Cr(III) was partially retained onto the samples surface due to the lewis basicity of the nitrogen atoms [37] . In Zhu's research, Nitrogen and Fe(III) were co-doped in chitosan to improve the amphoteric adsorption performance.…”

Section: Advances In Engineering Research Volume 112mentioning

confidence: 99%

Physio-chemical treatment technologies for chromium removal

Zhang¹,

Li²

2017

Proceedings of the 2016 4th International Conference on Renewable Energy and Environmental Technology (ICREET 2016)

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Abstract. The article reviews the technical applicability of various physio-chemical treatments for the removal of hexavalent chromium (Cr(VI)) from aqueous solution. A particular focus is given to membrane electrolysis, photocatalytic reduction, adsorption and the application of nanotechnology in Cr(VI) removal. About 50 published studies (2011)(2012)(2013)(2014)(2015)(2016)(2017) are reviewed. Liquid membrane and electrodialysis were combined. Metal-organic frameworks (MOFs) emerged to enhance photocatalytic reduction. It is evident that adsorption is the most frequently studied and widely applied for the treatment of Cr(VI). And nanotechnology is mainly applied to nanoadsorbent which exhibited both reduction and adsorption capabilities. In general, further researches on methods with cost-effectiveness, technical-applicability, and plant-simplicity are vital for heavy metal removal such as chromium.

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Chromium (VI) removal from water by means of adsorption-reduction at the surface of amino-functionalized MCM-41 sorbents

Cited by 99 publications

References 43 publications

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

Ultrasonication‐assisted Synthesis of α, β‐Unsaturated Compounds Catalyzed by Amino‐functionalized FDU‐12 Catalyst

A Review on the Synergistic Features of Hexagonal Boron Nitride (White Graphene) as Adsorbent‐Photo Active Nanomaterial

Physio-chemical treatment technologies for chromium removal

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