A new modified MWCNTs with 3-aminopyrazole as a nanoadsorbent for Cd(II) removal from aqueous solutions

Alimohammady, Mobina; Jahangiri, Mansour; Kiani, Farhoush; Tahermansouri, Hasan

doi:10.1016/j.jece.2017.06.045

Cited by 48 publications

(6 citation statements)

References 80 publications

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“…FTIR spectroscopy was adopted to qualitatively confirm the chemical structure of MWCNTs@ZnO/PMAEFc nanohybrids, as depicted in Figure 1B. For MWCNTs, a wide and strong peak at 3460 cm −1 is assigned to the stretch band of the -OH groups due to the moisture absorbed from the air and the residues of carboxylic groups during preparation, and the vibration peak at 1638 cm −1 is attributed to the C=C stretch vibration band of the benzenoid (ν C=C ) structure in the MWCNTs skeleton, signifying the graphite structure of MWCNTs [40,41]. After MWCNTs are decorated with fine ZnO NPs, as illustrated in Figure 1B(b), a new vibration peak emerges at 446 cm −1 , which is attributable to the Zn-O characteristic peak [42,43].…”

Section: Resultsmentioning

confidence: 99%

Organic–Inorganic Nanohybrid Electrochemical Sensors from Multi-Walled Carbon Nanotubes Decorated with Zinc Oxide Nanoparticles and In-Situ Wrapped with Poly(2-methacryloyloxyethyl ferrocenecarboxylate) for Detection of the Content of Food Additives

Cui

et al. 2019

Nanomaterials

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An electrochemical sensor for detection of the content of aspartame was developed by modifying a glassy carbon electrode (GCE) with multi-walled carbon nanotubes decorated with zinc oxide nanoparticles and in-situ wrapped with poly(2-methacryloyloxyethyl ferrocenecarboxylate) (MWCNTs@ZnO/PMAEFc). MWCNTs@ZnO/PMAEFc nanohybrids were prepared through reaction of zinc acetate dihydrate with LiOH·H2O, followed by reversible addition-fragmentation chain transfer polymerization of 2-methacryloyloxyethyl ferrocenecarboxylate, and were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), Raman, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic force microscope (AFM), scanning electron microscope (SEM), and transmission electron microscope (TEM) techniques. The electrochemical properties of the prepared nanohybrids with various composition ratios were examined by cyclic voltammetry (CV), and the trace additives in food and/or beverage was detected by using differential pulse voltammetry (DPV). The experimental results indicated that the prepared nanohybrids for fabrication of electrochemical modified electrodes possess active electroresponse, marked redox current, and good electrochemical reversibility, which could be mediated by changing the system formulations. The nanohybrid modified electrode sensors had a good peak current linear dependence on the analyte concentration with a wide detection range and a limit of detection as low as about 1.35 × 10−9 mol L−1, and the amount of aspartame was measured to be 35.36 and 40.20 µM in Coke zero, and Sprite zero, respectively. Therefore, the developed nanohybrids can potentially be used to fabricate novel electrochemical sensors for applications in the detection of beverage and food safety.

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Section: Resultsmentioning

confidence: 99%

Organic–Inorganic Nanohybrid Electrochemical Sensors from Multi-Walled Carbon Nanotubes Decorated with Zinc Oxide Nanoparticles and In-Situ Wrapped with Poly(2-methacryloyloxyethyl ferrocenecarboxylate) for Detection of the Content of Food Additives

Cui

et al. 2019

Nanomaterials

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“…Temkin isotherm is depicted by the following equation

Where, K T (L/mg) is the Temkin isotherm constant and B is constant related to sorption heat (J/mol) [ 27 ].…”

Section: Methodsmentioning

confidence: 99%

“…Where, K T (L/mg) is the Temkin isotherm constant and B is constant related to sorption heat (J/mol) [27].…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Adsorption of Malachite Green by extracellular polymeric substance of Lysinibacillus sp. SS1: kinetics and isotherms

Miyar¹,

Pai²,

Goveas³

2021

Heliyon

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Use of novel biological materials as adsorbents for removal of xenobiotics is gaining significance owing to their exceptional advantages. An extracellular polymeric substance (EPS) produced by Lysinibacillus sp. SS1 had rough porous surface as observed by SEM analysis. Adsorption ability of EPS was estimated against various textile dyes such as Malachite Green (MG), Methyl Orange, Congo Red and Coomassie Blue. About 82% of MG (100 mg/L) was adsorbed onto 2.5 mg EPS within 30 min. Effect of MG concentration, EPS weight, agitation speed and incubation time on adsorption, studied by one factor at a time approach, revealed that adsorption was influenced by all factors. Maximum adsorption of 99.01 ± 0.61% was achieved at 100 mg/L MG, 10 mg EPS, 120 RPM in 75 min with maximum adsorption capacity of 247.5 mg/g. Kinetics was affected by MG and EPS amounts, with shift from pseudo first to pseudo second order with increase in concentration. Adsorption of MG by EPS of Lysinibacillus sp. SS1 was identified as unilayer chemisorption as it followed Langmuir isotherm with maximum adsorption capacity ( Q m ) of 178.57 mg/g ( R 2 = 0.9889). This is the first report on potential of EPS produced by Lysinibacillus sp. SS1 as novel biodegradable adsorbent with high efficacy of MG removal from aqueous solutions.

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“…Carbon nanotubes (CNTs) are one novel nano-adsorbent used in water pollution treatment over the past decades (Alimohammady et al, 2017;Ahmadi et al, 2019). Compared to zeolite, kaolinite, chitosan, biopolymer, and other traditional adsorption materials (Zhang M. et al, 2019;Fu et al, 2021;Khan et al, 2021), CNTs have more excellent aspect ratio, specific surface area, and unique one-dimensional structure (Sone et al, 2008;Aliyu, 2019), and all these structural features provide convenient conditions for metal ions adhering.…”

Section: Introductionmentioning

confidence: 99%

“…Abbasi et al (2021) prepared a novel calcined CuAl-layered double hydroxides/carbon nanotubes/ polyvinylidene fluoride composites via a hydrothermal, casting, and calcination, and the composites show favorable adsorption properties to carminic acid. Alimohammady et al (2017) reported a novel nano-adsorbent synthesized by the carboxylic multi-walled carbon nanotubes (MWCNTs-COOH) and 3aminopyrazole, and the composite MWCNTs-f can remove 83.7% Cd(II) from aqueous solution at the optimum conditions. AlOmar et al ( 2016) synthesized six deep eutectic solvents (DESs) systems based on choline chloride and six different hydrogen bond donors, and then the DESs were used to functionalize CNTs for adsorbing lead ions.…”

Section: Introductionmentioning

confidence: 99%

Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal

Zhang

et al. 2021

Front. Environ. Chem.

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Amino-thiol bifunctional polysilsesquioxane/carbon nanotubes (PSQ/CNTs) magnetic composites were prepared by sol-gel method with two types of functional siloxanes coating on carboxyl CNTs simultaneously. The composites were served as efficient adsorbents for removing Hg(II) in aqueous solution and the adsorption properties were investigated systematically. The optimal pH of bifunctional composites for Hg(II) removal is at pH 4.5. The thermodynamic fitting curves are more consistent with the Langmuir model and the adsorption capacities of the bifunctional composites for Hg(II) varied from 1.63 to 1.94 mmol g−1 at 25°C according to the Langmuir model. The kinetics curves are more fitted to the pseudo-second-order model and the composites could selectively adsorb Hg(II) in a series of binary metal ions solution. The elution regeneration tests showed that the adsorption rate could still reach 78% after repeat cycle three times. It is expected that the bifunctional PSQ/CNTs magnetic composites can be potentially applied to remove low concentration Hg(II) from waste water.

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A new modified MWCNTs with 3-aminopyrazole as a nanoadsorbent for Cd(II) removal from aqueous solutions

Cited by 48 publications

References 80 publications

Organic–Inorganic Nanohybrid Electrochemical Sensors from Multi-Walled Carbon Nanotubes Decorated with Zinc Oxide Nanoparticles and In-Situ Wrapped with Poly(2-methacryloyloxyethyl ferrocenecarboxylate) for Detection of the Content of Food Additives

Organic–Inorganic Nanohybrid Electrochemical Sensors from Multi-Walled Carbon Nanotubes Decorated with Zinc Oxide Nanoparticles and In-Situ Wrapped with Poly(2-methacryloyloxyethyl ferrocenecarboxylate) for Detection of the Content of Food Additives

Adsorption of Malachite Green by extracellular polymeric substance of Lysinibacillus sp. SS1: kinetics and isotherms

Amino-Thiol Bifunctional Polysilsesquioxane/Carbon Nanotubes Magnetic Composites as Adsorbents for Hg(II) Removal

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