Synthesis of zeolite nanostructures from waste aluminum cans for efficient removal of malachite green dye from aqueous media

Abdelrahman, Ehab A.

doi:10.1016/j.molliq.2018.01.038

Cited by 149 publications

(47 citation statements)

References 67 publications

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“…Researchers are focusing on the applications of clay minerals attributed to their low-cost, abundant outputs, non-toxicity, stability, and ability of ion exchange. In this regard, several clay minerals such as bentonite (Beheshti et al, 2018;Mat et al, 2018), montmorillonite (Mahmoudian et al, 2018), zeolite (Abdelrahman, 2018), and kaolin have been reported for the removal of dyes from wastewater. Among these, bentonite had received greater attention as adsorbent due to its high adsorption capacity and cost-effective nature.…”

Section: Introductionmentioning

confidence: 99%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

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Raw bentonite (RB) was chemically modified by citric acid (CA) to obtain a low-cost and environment-friendly citric acid incorporated bentonite (CAB) adsorbent, which was applied for the adsorptive removal of Congo Red (CR). The effect of adsorbent dosage, contact time, ionic strength, surfactant, and pH on adsorption was investigated. Adsorption equilibrium data fitted well with Langmuir model while the Langmuir adsorption capacity of CR on CAB reached up to 384 mg•g −1. Furthermore, CR adsorption on CAB followed pseudo-second kinetic model while intra-particle diffusion was not the only rate-limiting step as determined from intra-particle diffusion model investigation. RB and CAB were characterized by XRD, FT-IR, and BET techniques. A proposed mechanism for the adsorption of CR over CAB suggested the chemical adsorption phenomenon is mainly controlled by chelation, hydrogen bonding, and fixing.

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Section: Introductionmentioning

confidence: 99%

Citric Acid Modified Bentonite for Congo Red Adsorption

et al. 2019

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“…The 912 cm -1 peak is an Al-OH band deformation vibration absorption peak. According to the FT-IR spectrum in Figure 4 b, the characteristic zeolite bands appeared coincidentally with the disappearance of halloysite, including the asymmetric and symmetric T-O (T = Si/Al) stretch [38][39][40]. The bands in the region of 500-650 cm −1 are related to the presence of the double rings (D4R and D6R) in the framework structure [41].…”

Section: Resultsmentioning

confidence: 99%

In SituSynthesis of Structural Hierarchy Flowerlike Zeolite and Its Application for Fluoride Removal in Aqueous Solution

Tian

Gan

2019

Journal of Nanomaterials

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A three-dimensional hierarchically structured flowerlike zeolite was synthesized using naturally occurring nanohalloysite (HNT) by hydrothermal methods. Halloysite a hydrated aluminum silicate with nanohollow morphology, microporosity, and environmentally friendly properties was chosen to be the sole precursor. The morphology and structure of the composite that was prepared was characterized using XRD, FT-IR, BET, TG, SEM, HRTEM, and NMR. SEM and HRTEM images indicated that the synthesized zeolite has a flowerlike hierarchical structure, with well-defined edges and uniform pore channels. FT-IR and NMR spectra indicated that different species of silicon and aluminum were present in the synthesized zeolite. The zeolite was applied in fluoride (F-) removal from aqueous solutions. Single-factor studies, including the initial concentration of F-, initial adsorbent concentration, and the effect of pH value on the adsorption properties, were investigated to evaluate the removal behavior of F- by the zeolite. The zeolite exhibited strong adsorption properties for fluoride ions (F-), with an adsorption capacity up to 161 mg g-1. The pseudo-second-order kinetics and Freundlich models were the best fit to the kinetics and isotherm experimental data, respectively.

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“…where, E oxd onset is the onset oxidation potential and E red onset is the onset reduction potential of the dyes and 4.8 eV is the energy level of ferrocene below the vacuum level. The ELUMO/EHOMO of the TB, SPD and EB dyes are dyes [28]. Figure 7A(a)-C(a) show the optical absorption spectra of Cr-ZnO.…”

Section: Electrochemical Properties Of Dyesmentioning

confidence: 99%

Optical and electrical properties of organic dye sensitized Cr–ZnO and Ni–CdO nanoparticles

Yathisha

Nayaka

2020

SN Appl. Sci.

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In this work presents an approach for the selection of dye sensitized Cr-ZnO and Ni-CdO nanoparticles as a photo anode material for the applications of DSSCs. The 4 wt% Cr-ZnO and Ni-CdO nanoparticles were synthesized through simple and fast microwave combustion method. X-ray difraction (XRD) was used for the detection of crystalline phases and size of the synthesized nanomaterials. It confirms the existence of hexagonal wurtzite phase of Cr-ZnO (30-35 nm) and cubic phase of Ni-CdO (43-45 nm) nanoparticles. SEM and TEM micrographs of Cr-ZnO and Ni-CdO reveal that the synthesized samples are prismatic and spherical shaped, respectively. Optical absorption of Cr-ZnO and Ni-CdO nanoparticles before and after sensitization with Trypan Blue (TB), SPADNS (SPD) and Evans Blue (EB) dyes were examined through UV-Visible spectroscopy. The results show that the selected dyes improve the absorption edge of Cr-ZnO and Ni-CdO nanoparticles to longer wavelength side. HOMO and LUMO energy levels of the dyes were calculated by cyclic voltammetry. I-V characteristics of Cr-ZnO and Ni-CdO films before and after sensitization with dyes revealed the influence of dye sensitization on photo conductivity of Cr-ZnO and Ni-CdO nanoparticles.

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Synthesis of zeolite nanostructures from waste aluminum cans for efficient removal of malachite green dye from aqueous media

Cited by 149 publications

References 67 publications

Citric Acid Modified Bentonite for Congo Red Adsorption

Citric Acid Modified Bentonite for Congo Red Adsorption

In SituSynthesis of Structural Hierarchy Flowerlike Zeolite and Its Application for Fluoride Removal in Aqueous Solution

Optical and electrical properties of organic dye sensitized Cr–ZnO and Ni–CdO nanoparticles

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