FTIR, Raman and XRD analysis of graphene oxide films prepared by modified Hummers method

Surekha, G; Krishnaiah, K. Venkata; Ravi, Natarajan; Suvarna, R. Padma

doi:10.1088/1742-6596/1495/1/012012

Cited by 207 publications

(92 citation statements)

References 16 publications

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“…Vibrations at 1435 and 2924 cm −1 for Cu‐Cd(S 2 CN[Et] 2 ) n ]) while at 1438 and 2928 cm −1 for Cu‐Cd‐GO(S 2 CN[Et] 2 ) n ]) were representative of the CH 2 functional group on the IR spectra 33,34 . The absorption peaks attributable to OH stretch were located around 3450 cm −1 for Cu‐Cd(S 2 CN[Et] 2 ) n ]) due to the absorbance of moisture content from the atmosphere while it represented the hydroxyl group present in GO in Cu‐Cd‐GO(S 2 CN[Et] 2 ) n ]) composite 32 …”

Section: Resultsmentioning

confidence: 99%

Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Gul

Ahmad

2022

Intl J of Energy Research

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Summary Metal sulfides conjugated graphene oxide (GO) have captivated researchers owing to the elaborated opto‐electrochemical and photocatalytic properties. Current research reports the synthesis of Copper sulfide (CuS) and cadmium sulfide (CdS) bimetal sulfide GO composite by single‐source precursor using diethyl dithiocarbamate ligand. The synthesized alloy was deposited through electron beam deposition system. Characterization of the thin films was done by various techniques including, XRD, UV‐visible spectrophotometry, fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM)‐energy dispersive X‐ray analysis (EDX). Electrochemical properties were investigated through cyclic voltammetry and linear sweep voltammetry using 3‐M KOH. Degradation of toxicants such as methyl red dye, pesticide isopyrazam, and phenol was done by the thin film to evaluate its photocatalytic characteristic. (CuS‐CdS)GO thin film showed separate bandgaps for CuS and CdS as 2.04 and 3.3 eV. A hexagonal crystal system for (Cu2S‐CdS)GO was observed through XRD with an average crystal size of 50 nm. A cubic shape with globular edges was detected by SEM investigation. An impressive specific capacitance value of 35 F g−1 at 100 mV s−1 proved it as a promising electrode for supercapacitors. A remarkable photocatalytic degradation rate was obtained by the thin film for all the toxicants with the highest rate for pesticide, that is, 81% under just 60 minutes, which remained >70% even after four successive cycles. The profound electrochemical and photocatalytic properties of (Cu2S‐CdS)GO thin film make it an auspicious material for optical, electrical, and photo‐devices.

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Section: Resultsmentioning

confidence: 99%

Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Gul

Ahmad

2022

Intl J of Energy Research

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“…The two weaker sub-peaks at 286.75 and 288.9 eV can be attributed to the sp 2 hybridization of C O/C═O and O C═O. 21…”

Section: Xps Analysismentioning

confidence: 94%

Preparation of recyclable materials for removing heavy metal ions in aqueous solution and wastewater applications

Liang

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: Two functionalized nano-adsorbents were prepared by modifying carbon nanotubes and graphene oxide with active carboxyl groups, and used to remove Pb(II) heavy metal ions in aqueous solutions. The adsorbent combines the advantages of the active groups that can easily capture heavy metal ions and the high specific surface area of nanomaterials, has high adsorption capacity and affinity and is easily separated from the sample solution by centrifugation.RESULTS: Both scanning and transmission electron microscopy images show that the walls of the carbon tubes are oxidized and the ports at both ends are also opened, and the graphene oxide surface has more folds, producing more active groups such as carboxyl and hydroxyl groups, which provide suitable active sites for the attachment of heavy metals. X-ray photoelectron spectroscopy shows that characteristic peak of lead appears in the energy spectrum after adsorption. Raman and infrared spectra show that the surface defects of the two materials have increased. The adsorption capacity calculated using the Langmuir equation was 118.82 and 178.23 mg g −1 at pH = 5, and equilibrium adsorption capacity was reached at 120 min. The adsorption capacity of the materials for Pb 2+ reaches the equilibrium concentration value when the concentration is 50 mg L −1 . Wastewater experiments were carried out to prove that the materials can meet the relevant national standards for lead ions in actual wastewater. CONCLUSIONS:The adsorption results for the two materials demonstrated that the materials prepared in the optimum conditions exhibited strong adsorption ability and high stability and with promise for practical applications.

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“…At the same time, NaNO 3 produces NO 2 , N 2 O 4 , and other toxic gases during its use. Consequently, the modified Hummers' method was adopted in this study [31]. A schematic diagram of the preparation process is schematized in Figure 1 [32].…”

Section: Preparation Of Gomentioning

confidence: 99%

Mechanical Behavior and Microstructure of Graphene Oxide Electrodeposited Carbon Fiber Reinforced Cement-Based Materials

Wang

et al. 2022

Crystals

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In this study, graphene oxide (GO) was prepared by an improved Hummers’ method, and the graphene oxide–carbon fiber (GO-CF) hybrid fibers were prepared by electrophoretic deposition (EPD) with the above GO. The microstructure and mechanical properties of GO, CF and GO-CF cement matrix composites were studied by X-ray diffraction (XRD), SEM and mechanical tests. X-ray diffraction (XRD) and SEM results showed that the surface modification of CF with GO could effectively improve the dispersion of CF in the cement matrix, the template action of GO providing nucleation sites for cement hydration, which significantly enhanced the interface bond between CF and the cement matrix. The mechanical properties test results showed that the early compressive strength and flexural strength of cement matrix composites were significantly improved by GO. Adding CF into the cement matrix significantly improved the flexural strength, although the compressive strength was not improved, even exhibiting a downward trend when the CF content exceeded 0.5%. The flexural and compressive strength of GO-CF cement matrix composites were clearly improved, its 7 d flexural strength and compressive strength increased by 30.89% and 17.56%, respectively, and its 28 d flexural strength and compressive strength increased by 38.37% and 14.32%, respectively. The research results indicate that a new method was provided which used GO as a dispersant and surface modifier to improve the dispersion of chopped CF in a cement matrix, and the interaction between CF and the cement matrix interface could also be applied to the functional aspects of cement matrix composites.

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FTIR, Raman and XRD analysis of graphene oxide films prepared by modified Hummers method

Cited by 207 publications

References 16 publications

Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Preparation of recyclable materials for removing heavy metal ions in aqueous solution and wastewater applications

Mechanical Behavior and Microstructure of Graphene Oxide Electrodeposited Carbon Fiber Reinforced Cement-Based Materials

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FTIR, Raman and XRD analysis of graphene oxide films prepared by modified Hummers method

Cited by 207 publications

References 16 publications

Electron beam deposited (Cu2S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Electron beam deposited (Cu2S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Preparation of recyclable materials for removing heavy metal ions in aqueous solution and wastewater applications

Mechanical Behavior and Microstructure of Graphene Oxide Electrodeposited Carbon Fiber Reinforced Cement-Based Materials

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Product

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About

Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation

Electron beam deposited (Cu₂S‐CdS)GOthin film as active electrode for supercapacitor and enhanced photocatalyst for water remediation