Synthesis of interstratified graphene/montmorillonite composite material through organics-pillared, delamination and co-stacking and its application in hexavalent chromium removal from aqueous solution

Chen, Wei; Zhang, Xiaoping; Mamadiev, Mairambek; Zhao, Chunhu; Wang, Zihao; Xu, Hanjiang

doi:10.1016/j.apt.2016.10.021

Cited by 32 publications

(15 citation statements)

References 51 publications

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“…1a, it can be seen that a diffraction peak of pure GO was at 2θ = 9.7°. The interlayer spacing of GO calculated is 0.91 nm according to Bragg's equation, which is close to the values reported in the literature [30]. For the obtained NiS (Fig.…”

Section: Colorimetric Detection Of Glutathionesupporting

confidence: 90%

Novel synthesis of NiS/MMT/GO nanocomposites with enhanced peroxidase-like activity for sensitive colorimetric detection of glutathione in solution

Chen

Zhu

Yang

et al. 2018

Adv Compos Hybrid Mater

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In the present study, a facile method was proposed to prepare nickel sulfide (NiS) nanoparticles well-dispersed on the surface of montmorillonite/graphene oxide (MMT/GO). The NiS/MMT/GO nanocomposites were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), fluorescence spectrophotometry, etc. Significantly, the novel NiS/MMT/GO nanocomposites exhibited high peroxidase-like activity toward the typical chromogenic substrate, 3,3′,5,5′-tetramethylbenzidine (TMB). However, glutathione (GSH) could inhibit the peroxidase-like activity of NiS/ MMT/GO along with a visible color variation. Based on the color change of the system of nanocomposites-H 2 O 2 -TMB, a novel colorimetric sensor was designed and conveniently used to quantitatively detect H 2 O 2 as well as GSH. The limit of detection (LOD) of H 2 O 2 and GSH is 9.73 and 0.5043 μM, respectively. The proposed H 2 O 2 sensor has potential application in the field of biosensing, food, and environment.

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Section: Colorimetric Detection Of Glutathionesupporting

confidence: 90%

Novel synthesis of NiS/MMT/GO nanocomposites with enhanced peroxidase-like activity for sensitive colorimetric detection of glutathione in solution

Chen

Zhu

Yang

et al. 2018

Adv Compos Hybrid Mater

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“…The highest value was achieved at pH 1, however, the adsorption is not quantitative. In strong acidic solution, Cr(VI) can be partially reduced to Cr(III): HCrO 4 − + 7H + + 3e − → Cr 3+ + 4H 2 O [ 28 ], which is not adsorbed on positively charged surface of GO, GO-1 N, GO-2 N and GO-3 N. The influence of pH on the adsorption of Cr(III) was also studied. As can be seen in Fig.…”

Section: Resultsmentioning

confidence: 99%

Selective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanes

et al. 2018

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Novel adsorbents are described for the preconcentration of chromium(VI). Graphene oxide (GO) was modified with various amino silanes containing one, two, or three nitrogen atoms in the molecule. These include 3-aminopropyltriethoxysilane (APTES), N-(3-trimethoxysilylpropyl)ethylenediamine (TMSPEDA), and N1-(3-trimethoxysilylpropyl)diethylenetriamine (TMSPDETA). The resulting GO derivatives were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive X-ray fluorescence spectrometry (EDXRF). Adsorption studies show that these GO based sorbents are highly selective for Cr(VI) in the presence of Cr(III) at pH 3.5. Although the amino silanes applied in modification of GO contain different numbers of nitrogen atoms, the maximum adsorption capacities of GO derivatives are very similar (13.3–15.1 mg·g−1). Such results are in accordance with spectroscopy studies which show that the amount of amino silanes attached to GO decreases in the order of APTES > TMSPEDA > TMSPDETA. The APTES-modified GO was applied to selective and sensitive extraction of Cr(VI) ions prior to quantitation by low-power EDXRF using the Cr Kα line. The Cr(VI) ions need not be eluted from the solid adsorbent. The method has a 0.17 ng·mL−1 detection limit, and the recovery is 99.7 ± 2.2% at a spiking level of 10 ng·mL−1. The method was successfully applied to the determination of Cr(VI) in water samples. Graphical abstractGraphene oxide adsorbents modified with various amino silanes are described for the preconcentration and speciation of trace and ultratrace levels of chromium ions. Electronic supplementary materialThe online version of this article (10.1007/s00604-017-2640-2) contains supplementary material, which is available to authorized users.

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“…Both materials showed regeneration efficiency due to shuttling between adsorption and desorption of Cr(VI) with the change in pH of the reaction medium. 155,156 In both cases, Cr(VI) is adsorbed in acidic solution (pH B 3.0) by intra-particle diffusion, surface adsorption, complexation and boundary layer diffusion processes. 156 In the case of composite material 1 (Fig.…”

Section: Polymer and Biomass Modified Nanoclaysmentioning

confidence: 99%

“…156 In the case of composite material 1 (Fig. 13), the Cr(VI)-laden composite (0.1 g) was reused after treatment with 50 mL of 0.3 mol L À1 NaOH for 2 h (total B4 cycles) following by reactivation with 1 mol L À1 HCl for 3 h. 155 For composite material 2 (Fig. 13), Cr(VI)-loaded adsorbent (0.15 g) was treated with 20 mL of 0.1 mol L À1 NaOH at 30 1C for 90 min (total B6 cycles).…”

Section: Polymer and Biomass Modified Nanoclaysmentioning

confidence: 99%

Biocompatible functionalisation of nanoclays for improved environmental remediation

et al. 2019

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Synthesis of interstratified graphene/montmorillonite composite material through organics-pillared, delamination and co-stacking and its application in hexavalent chromium removal from aqueous solution

Cited by 32 publications

References 51 publications

Novel synthesis of NiS/MMT/GO nanocomposites with enhanced peroxidase-like activity for sensitive colorimetric detection of glutathione in solution

Novel synthesis of NiS/MMT/GO nanocomposites with enhanced peroxidase-like activity for sensitive colorimetric detection of glutathione in solution

Selective adsorption and determination of hexavalent chromium ions using graphene oxide modified with amino silanes

Biocompatible functionalisation of nanoclays for improved environmental remediation

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