A facile method to modify bentonite nanoclay with silane

Abeywardena, Sujani B. Y.; Perera, Srimala; Silva, K. M. Nalin de; Tissera, Nadeeka P.

doi:10.1007/s40089-017-0214-2

Cited by 17 publications

(9 citation statements)

References 12 publications

(14 reference statements)

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“…The material is more compact and less porosity is visible. Similar results were reported previously when the 3-aminotriethoxysilane (APTES) was grafted with bentonite nano-clay and showed that the APTES is successfully grafted with bentonite [22].…”

Section: Characterization Of Materialssupporting

confidence: 89%

Low cost, highly sensitive and selective electrochemical detection of arsenic (III) using silane grafted based nanocomposite

Lalmalsawmi

Zirlianngura

Tiwari

et al. 2019

Environmental Engineering Research

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Novel silane grafted bentonite was obtained using the natural bentonite as precursor material. The material which is termed as nanocomposite was characterized by the Fourier Transform Infra-red (FT-IR) and X-ray diffraction (XRD) methods. The surface imaging and elemental mapping was performed using Scanning Electron Microscopic (SEM/EDX) technique. The electroanalytical studies were performed using the nanocomposite electrode. The electroactive surface area of nanocomposite electrode was significantly increased than the pristine bentonite or bare carbon paste based working electrode. The impedance spectroscopic studies were conducted to simulate the equivalent circuit and Nyquist plots were drawn for the carbon paste electrode and nanocomposite electrodes. A single step oxidation/reduction process occurred for As(III) having ΔE value 0.36 V at pH 2.0. The anodic stripping voltammetry was performed for concentration dependence studies of As(III) (0.5 to 20.0 μg/L) and reasonably a good linear relationship was obtained. The detection limit of the As(III) detection was calculated as 0.00360±0.00002 μg/L having with observed relative standard deviations (RSD) less than 4%. The presence of several cations and anions has not affected the detection of As(III) however, the presence of Cu(II) and Mn(II) affected the detection of As(III). The selectivity of As(III) was achieved using the Tlawng river water sample spiked with As(III).

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Section: Characterization Of Materialssupporting

confidence: 89%

Low cost, highly sensitive and selective electrochemical detection of arsenic (III) using silane grafted based nanocomposite

Lalmalsawmi

Zirlianngura

Tiwari

et al. 2019

Environmental Engineering Research

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“…FT‐IR spectra of raw bentonite and 10 %, 20 % and 30 % TSA over bentonite are shown in Figure . The strong band of Si−O stretching vibrations were observed at 978 cm −1 . Bending vibration of Al−Al−OH was ascertained at 920 cm −1 .…”

Section: Resultsmentioning

confidence: 88%

12‐Tungstosilicic Acid H₄[W₁₂SiO₄₀] Over Natural Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2(1H)‐Ones

Chopda

Dave

2020

ChemistrySelect

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Regionally available bentonite was modified by using heteropolyacid 12‐tungstosilicic acid H4[W12SiO40] (TSA). The prepared 10–30 % TSA/bent catalysts were characterized by XRD, FTIR, FeSEM and EDS. The catalytic activity of all three samples was studied on classical Biginelli reaction. Among all, 30 % TSA/bent displayed high catalytic activity and reusability. The effect of solvent was also undertaken to find the best media for the reaction. This protocol was extended to various aldehydes for the synthesis of different dihydropyrimidones (DHPMs) in high yields in ethanol.

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“…All characteristic bands of clay and soil samples were retained after the silane conversion. Additional bands were found at 2924 and 2848 cm −1 , which were attributed to the silane modifiers −CH 2 stretching vibration [35]. In addition, an extra silicate group of silane modifiers [36] boosted the intensity of the peak 1034 cm −1 .…”

Section: Characterization Of Silane Modified Clay and Soilmentioning

confidence: 95%

Removal of Cd (II) Ions from Bioretention System by Clay and Soil Wettability

Cai

et al. 2021

Water

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In this work, a silane modifier with benzyl substitutes (OFS-B) and linear substitutes (OFS-L) was used to modify bentonite clay and soil, and the results were characterized by Fourier transform-infrared absorption spectroscopy (FT-IR) and powder-X-ray diffraction (XRD) analysis. A contact angle analysis was performed to determine the wettability of modified clay and soil. The findings revealed that silane-modified OFS-L clay and soil produced wettable surfaces, while OFS-B exhibited hydrophobic properties. These clays and soils were used in a bioretention system for Cd (II) removal. In the study, seven different types of bioretention systems, including natural, OFS-L, and OFS-B modified clay and soil, as well as natural, OFS-L, and OFS-B modified soil, were applied to Cyperus alternifolius plants without an additional layer. The removal capacity of Cd (II) was measured in the following order: modified clay > modified soil > original clay/soil > no layer, i.e., 99.48%, 92.22%, 88.10/78.5%, and 30.0%, respectively. OFS-L removed more Cd (II) than OFS-B during the modification. OFS-L now improves the bioavailability and accumulation of Cd (II) in the plant (18.5 µg/g) and has a higher chlorophyll-b concentration (1.92 mg/g fresh weight) than other systems. The wettable clay exhibited clay leaching into the various levels of the bioretention system. In the bioretention system, benzyl substituted clay prevented the penetration of water and formed a Cd (II) agglomeration. When compared to non-wettable modifiers, these results indicated that wettable clay material could be a capable material for removing Cd (II).

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A facile method to modify bentonite nanoclay with silane

Cited by 17 publications

References 12 publications

Low cost, highly sensitive and selective electrochemical detection of arsenic (III) using silane grafted based nanocomposite

Low cost, highly sensitive and selective electrochemical detection of arsenic (III) using silane grafted based nanocomposite

12‐Tungstosilicic Acid H₄[W₁₂SiO₄₀] Over Natural Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2(1H)‐Ones

Removal of Cd (II) Ions from Bioretention System by Clay and Soil Wettability

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A facile method to modify bentonite nanoclay with silane

Cited by 17 publications

References 12 publications

Low cost, highly sensitive and selective electrochemical detection of arsenic (III) using silane grafted based nanocomposite

Low cost, highly sensitive and selective electrochemical detection of arsenic (III) using silane grafted based nanocomposite

12‐Tungstosilicic Acid H4[W12SiO40] Over Natural Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2(1H)‐Ones

Removal of Cd (II) Ions from Bioretention System by Clay and Soil Wettability

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12‐Tungstosilicic Acid H₄[W₁₂SiO₄₀] Over Natural Bentonite as a Heterogeneous Catalyst for the Synthesis of 3,4‐dihydropyrimidin‐2(1H)‐Ones