Polyacrylamide gel synthesis, characterization, and optical properties of Co1-xNixCr2O4 spinel nanopigment

Ahmadyari-Sharamin, Mehdi; Hassanzadeh-Tabrizi, S.A.

doi:10.1007/s10971-021-05590-2

Cited by 10 publications

(3 citation statements)

References 58 publications

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“…Therefore, methylene bisacrylamide can form a three-dimensional polymeric network that traps metal ions [73,74]. This entrapment produces a polymeric template for the formation of nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Polyacrylamide gel synthesis of CuO/CuFe2O4 nanoparticles for H2S gas sensing

Tabrizi

2024

Preprint

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In the present work, CuO/CuFe2O4 nanoparticles were synthesized via a polyacrylamide gel. The produced nanocomposites were utilized as a gas sensor for the detection of H2S gas. The nanoparticles were characterized via XRD, FTIR, SEM and TEM techniques. XRD results revealed that the as-prepared product was amorphous and CuO and CuFe2O4 phases were formed after calcination at 800°C. Microstructural studies showed that the nanoparticles have a particle size distribution ranging from 60 to 120 nm. Most of the particles had a spherical morphology. The polyacrylamide network acted as a template for the formation of the nanoparticles. The H2S gas sensing characteristics of the products were studied at different concentrations and operating temperatures. In addition, the effect of humidity on the gas-sensing response was investigated. The prepared CuO/CuFe2O4 sensors can respond up to 25 when exposed to 10 ppm H2S which is higher than the pure CuO or CuFe2O4 sensors. The sensors reached a detection limit of 0.1 ppm and demonstrated clear sensitivity and quick response and recovery behavior toward H2S gas. The CuO/CuFe2O4 heterogeneous nanostructures also showed proper H2S gas response and selectivity in response to interfering gases like NH3, NO2, HCHO and CO. The gas sensing mechanism of the composites was also discussed.

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Section: Resultsmentioning

confidence: 99%

Polyacrylamide gel synthesis of CuO/CuFe2O4 nanoparticles for H2S gas sensing

Tabrizi

2024

Preprint

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“…In contrast, the bandgap of the Al-BaCr 2 O 4 @GO nanocomposite has been reduced to 2.21 eV. This reduction can be attributed to quantum size effects, leading to a narrowing of the bandgap [31,32]. The UV-Vis spectrophotometry results provide valuable insights into the optical properties and electronic transitions of both individual nanomaterials and their composite structures, offering essential information for applications in sensors, catalysis, and other optoelectronic devices.…”

Section: Uv-vis Spectrophotometrymentioning

confidence: 99%

Advanced composite material for high-performance supercapacitors: integrating graphene oxide and barium chromate

Saleemi,

Abdullah,

Batool

et al. 2024

Phys. Scr.

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Graphene oxide-based Barium chromate (BaCr2O4@GO) composites were successfully synthesized through sonication assisted by a hydrothermal process designed for supercapacitor applications. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and morphological analyses were employed to characterize the nanostructured composites. The XRD and FTIR results reveal that the GO nanoparticles are arranged in a honeycomb-like configuration. Moreover, the TEM images reveal the presence of cauliflower-like structures in the morphology of the composites, which is attributed to the effective intercalation of GO during the thermal reduction process. The electrochemical properties of the nanocomposite were compared to those reported in previous studies on metal chromite materials aimed at enhancing supercapacity applications. The analysis of Galvanostatic Charge-Discharge (GCD) data indicates a significant increase in power density values from 292 Wkg-1 to 495.5 W kg-1 for the Nanocomposites. The ability to achieve a balance between enhanced power density and efficient ion transport positions the -nanocomposites as a valuable candidate for advancing the performance of supercapacitors.

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“…The semiconductor materials with different shapes, dimensions, and particle sizes can be obtained by adjusting and controlling related process parameters [31][32][33][34]. The polyacrylamide gel method also showed great advantages in the preparation of multicomponent composites [35][36][37][38][39][40][41]. In the synthesis process, the multi-component composites can be synthesized by one-step or multi-step polyacrylamide gel method [40,41].…”

Section: Introductionmentioning

confidence: 99%

Removal of Congo Red from Wastewater Using ZnO/MgO Nanocomposites as Adsorbents: Equilibrium Isotherm Analyses, Kinetics and Thermodynamic Studies

Wang

Tang

Gao

et al. 2023

JNanoR

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One step polyacrylamide gel method was used to synthesize the ZnO/MgO adsorbents and the adsorption behavior with Congo red (CR) from wastewater was extensively investigated. Various advanced techniques were applied to confirm the ZnO/MgO adsorbents consist of Zn, C, Mg and O elements and do not contain any other impurity elements. With the increase of MgO content, the morphology of ZnO/MgO adsorbent changes from the agglomeration of large particles to evenly dispersed fine particles and then to icicle structure. Results demonstrated that the adsorption process of ZnO/MgO adsorbents was significantly affected by the change in initial dye solution pH, initial adsorbent dosage, contact time and reaction temperature. The optimum pH, adsorbent dosage, contact time and reaction temperature is 9.81, 2 g /L, 65 min and 293 K, respectively. The maximum adsorption capacity of ZnO/MgO (nZnO:nMgO = 8:2) adsorbents (295.138 mg/g) for the adsorption of CR dye was approximately double that of previous reports (125 mg/g). The adsorption equilibrium data are well fitted by the Freundlich and Langmuir isotherm models. Thermodynamic studies indicate that the adsorption process of ZnO/MgO adsorbents is an exothermic process. Based on the experimental and theoretical analysis, the adsorption mechanism for the ZnO/MgO adsorbents consisted of hydrogen bonding, n-π interaction and electrostatic interaction. The present work pioneers the potential application of ZnO/MgO adsorbents for the adsorption of CR dye and further provides experimental evidence for the synthesis of other adsorbents.

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Polyacrylamide gel synthesis, characterization, and optical properties of Co1-xNixCr2O4 spinel nanopigment

Cited by 10 publications

References 58 publications

Polyacrylamide gel synthesis of CuO/CuFe2O4 nanoparticles for H2S gas sensing

Polyacrylamide gel synthesis of CuO/CuFe2O4 nanoparticles for H2S gas sensing

Advanced composite material for high-performance supercapacitors: integrating graphene oxide and barium chromate

Removal of Congo Red from Wastewater Using ZnO/MgO Nanocomposites as Adsorbents: Equilibrium Isotherm Analyses, Kinetics and Thermodynamic Studies

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