Synthesis of PANI@ZnO Hybrid Material and Evaluations in Adsorption of Congo Red and Methylene Blue Dyes: Structural Characterization and Adsorption Performance

Toumi, Imane; Djelad, Halima; Chouli, Faïza; Benyoucef, Abdelghani

doi:10.21203/rs.3.rs-661310/v1

Cited by 3 publications

(10 citation statements)

References 5 publications

(5 reference statements)

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“…On the other hand, the IR spectrums of PANI show the principal characteristic peaks of the samples at 1592 cm − 1 , 1497 cm − 1 , 1376 cm − 1 , 1309 cm − 1 , 1164 cm − 1 and 825 cm − 1 in agreement with the literature [30]. The spectrum exhibits two bands at 1592 cm − 1 and 1497 cm − 1 are to the stretchin vibrations of the quinoid/benzenoid (Q/B) units of polyaniline [18,22]. The band at 1376 cm − 1 is to the C‚ N + stretching adjacent to the Q structure while that a band near 1309 cm − 1 is ascribed to C-N stretching vibration in the alternate rings of Q-B-Q units.…”

Section: Structural and Morphological Analysissupporting

confidence: 87%

“…Electrical conductivity measurement was carried out using 4-point probes method by Lucas Lab probe. The samples were dried at 70°C for overnight, and then pastilles have been prepared by a FTIR mold [18,19,22].…”

Section: Measurementsmentioning

confidence: 99%

“…The mixture was then stirred for another 24 h under magnetic stirring. Finally, the PANI@ZnO-SiO 2 obtained during the centrifugation process was washed several times with H 2 O and C 2 H 5 OH, and placed in a dryer at 70° C for all night long [18,24]. A graphical exempli cation of the materials formation is presented in Scheme 1.…”

Section: Fabricating Zno-siomentioning

confidence: 99%

“…eV, which were attributed to (= N-), (-NH-) and (-NH + ), respectively. Furthermore, the oxidation degree and protonation of PANI chain can be measured by analyzing the ratios of (-N=), (-NH-) and (-NH + ) [18,22]. The PANI matrix in hybrid materials contained 1.64% (= N-) and 0.85% (-NH-).…”

Section: Structural and Morphological Analysismentioning

confidence: 99%

“…In addition, PANI attached to the surface of the NPs prevents self-aggregation, due to high surface energy [17]. Among the actually available inorganics, Zinc oxide (ZnO) is regarded as an important metal oxide, featuring advantages in terms of environmental sustainability, costs, as well as wide range absorption [18,19]. Furthermore, the SiO 2 based products possess larger of porous, high speci c surface area, tunable pore sizes, stable and interconnected structures [20,21].…”

Section: Introductionmentioning

confidence: 99%

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Development and Characterization of Novel Hybrid Materials Formed from ZnO-SiO2-Modified and Polyaniline for Organic Dyes Adsorption and Electrochemical Supercapacitor Applications

Benchikh

Lahreche

Benmimoun

et al. 2022

Preprint

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Polyaniline (PANI) coated ZnO-SiO2 based hybrid material was prepared successfully by in-situ polymerization method and the product was analyzed by XPS, XRD, TEM, UV-vis, TGA, FTIR and BET techniques. According to these characterization results, ZnO were successfully incorporated with SiO2 and PANI matrix was also supported on ZnO–SiO2. The optical band gap was calculated from the Tauc’s plot it has been found 2.89 eV. The development of a PANI@ZnO–SiO2 is a new way to achieve better adsorption efficacy for Congo Red (CR) and Methylene Blue (MB) dyes in aqueous solutions due to the engineered excellent porous structure, which was 83.82 and 71.19 mg.g− 1, respectively. Moreover, this work reports also an extensive study of the effect of the SiO2 on the electrochemical performance of hybrid material based on ZnO and PANI employing cyclic voltammetry. It was found that the perfect stability, which can be sustained during a longtime of the galvanostatic charge-discharge (GCD) operation. The results reveal a superior cycling stability, with 90.1% capacitance retention after 1500 cycles.

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Section: Structural and Morphological Analysissupporting

confidence: 87%

Section: Measurementsmentioning

confidence: 99%

Section: Fabricating Zno-siomentioning

confidence: 99%

Section: Structural and Morphological Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development and Characterization of Novel Hybrid Materials Formed from ZnO-SiO2-Modified and Polyaniline for Organic Dyes Adsorption and Electrochemical Supercapacitor Applications

Benchikh

Lahreche

Benmimoun

et al. 2022

Preprint

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Adsorption of Congo red dye using metal oxide nano‐adsorbents: Past, present, and future perspective

Patil

Attarde

Dhake³

et al. 2023

Int J of Chemical Kinetics

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The latest developments in the adsorption of organic dyes by adsorbents (metal oxides, modified metal oxides) were addressed in this review study. The main goal of this paper is to sort out the dispersion information of adsorbent materials, which are often employed in organic dye adsorption. The review dedicated to the specific dyes adsorption using various adsorbent (metal oxides, modified metal oxides). The review covers the adsorption process including parameters, kinetics, and isotherms. The review gives the brief information of Congo red (CR) adsorption using metal oxide nano‐adsorbents which provide readers with massive dye specific collection. For the first time, several metal‐doped materials that absorb organic dyes are summarized and addressed. The review includes adsorption of organic dyes using single metal oxide, bimetallic oxide, trimetallic oxide, and modified metal oxide. This study also summarized the effects of critical factors such as pH, initial dye concentration, adsorbent dosage, contact time, and temperature on dye adsorption utilizing metal oxide nano‐adsorbents. In addition, the kinetic and applied isotherm models have been discussed. Finally, a few recommendations are made for further research on adsorbent materials.

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Study of Isotherm and Kinetics for Remediation of Congo Red Using Nanocomposite Bead

Sarkar

Sarkar²,

Santra³

et al. 2022

Fine Chemical Engineering

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Cellulose-based nanocomposite (FeCNB) has been synthesized via sol-gel conversion for adsorptive remediation of Congo red, a carcinogenic and mutagenic azo dye, from water. The bead was characterized by Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), energy dispersive X-ray analysis (EDAX) and transmission electron microscopy (TEM). The effect of adsorbent dose, pH, contact time, shaking speed, initial dye concentration and temperature was carried out in a batch adsorption study. The maximum removal of Congo red was found at pH 6.0, corresponding to the adsorbent dose of 1.0 gdm-3 and 90 min of contact time. The experimental data were analyzed using different isotherm and kinetic models. The data was fitted best to Langmuir isotherm model and pseudo-second-order kinetic model. The maximum adsorption capacity evaluated from Langmuir isotherm is 3.52 mgg-1 at 303 K. Thermodynamic study was carried out to evaluate the changes in Gibbs free energy (ΔG0 ), enthalpy (ΔH0 ) and entropy (ΔS0 ) of the dye-adsorbent interaction. The negative ΔG0 values at all temperatures suggested the spontaneous nature; the positive ΔH0 value indicated the endothermic nature and the positive ΔS0 indicated the increased randomness of the adsorption process. Desorption study found 0.1 (M) NaOH as the most suitable eluting agent for dye-loaded adsorbent. The adsorbent can be used up to five successive cycles of adsorption-desorption.

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Synthesis of PANI@ZnO Hybrid Material and Evaluations in Adsorption of Congo Red and Methylene Blue Dyes: Structural Characterization and Adsorption Performance

Cited by 3 publications

References 5 publications

Development and Characterization of Novel Hybrid Materials Formed from ZnO-SiO2-Modified and Polyaniline for Organic Dyes Adsorption and Electrochemical Supercapacitor Applications

Development and Characterization of Novel Hybrid Materials Formed from ZnO-SiO2-Modified and Polyaniline for Organic Dyes Adsorption and Electrochemical Supercapacitor Applications

Adsorption of Congo red dye using metal oxide nano‐adsorbents: Past, present, and future perspective

Study of Isotherm and Kinetics for Remediation of Congo Red Using Nanocomposite Bead

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