Investigation of the thermal and light sensing properties of graphene oxide and reduced graphene oxide films obtained by spin coating method

Olumurewa, Kayode Oladele; Eleruja, Marcus Adebola

doi:10.1080/1536383x.2022.2037569

Cited by 9 publications

(4 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The partially restored p-system in RGO lowers the band gap. 12,59 For example, Olumurewa et al 60 lowered the band gap from 2.4 to 1.5 eV by reducing GO with NaBH 4 . Although residual oxygen moieties, structural defects and vacancies that are generated during reduction of GO lessen conductivity of ultimate RGO relative to graphene (84 500 S cm −1 ), the bulk conductivities of some RGO falls within the useful ranges.…”

Section: Propertiesmentioning

confidence: 99%

Dynamics of reduced graphene oxide: synthesis and structural models

Mombeshora

Muchuweni

2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

Section: Propertiesmentioning

confidence: 99%

Dynamics of reduced graphene oxide: synthesis and structural models

Mombeshora

Muchuweni

2023

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…The absorption coefficient square is correlated with the photon energy by the Tauc relation [32], [49], [50] (𝛼𝛼ℎ𝑣𝑣)…”

Section: Uv Visible Spectroscopy Analysis Of Zns Samplesmentioning

confidence: 99%

Tuning the Properties of ZnxS1-x Nanoparticles by Controlling Reaction Conditions

Olumurewa

2022

Preprint

Self Cite

View full text Add to dashboard Cite

In this work, a modified synthesis method was deployed to obtain nanocrystalline zinc sulfide from zinc acetate. By utilizing the hydrothermal and sol gel method, the influence of: reaction time, solvent and temperature control were used to tune the properties of zinc sulfide. Our results showed that ZnS(B) (which was obtained by sol gel in water + hydrothermal) typified formation of increased sulfur vacancies while an increase in reaction time resulted in decreased sulfur vacancies. The introduction of chemical defects in ZnS(A) (which was obtained by sol gel in methanol + KOH) resulted in lower crystallite size. We observed that crystallinity improved with increased reaction time and utilization of water as solvent improved the crystallinity of the material as confirmed in ZnS(C) and ZnS(B). Furthermore, our result showed that reaction time influenced dislocation density of the material to a greater extent than type of solvent used. The crystallite size estimated by Scherer formula was in the range 1.35 nm – 18.64 nm while the band gap energy of the ZnS samples were calculated in the range 3.8 eV- 4.6 eV. Utilizing these novel syntheses methods can stimulate new directions in synthesizing ZnS crystals with options of choosing appropriate method for specific applications depending on properties to be traded off.

show abstract

“…The absorption coefficient square is correlated with the photon energy by the Tauc relation [32], [46], [47] (𝛼𝛼ℎ𝑣𝑣)…”

Section: Uv Visible Spectroscopy Analysis Of Zns Samplesmentioning

confidence: 99%

Tuning the Properties of ZnS1-x Nanoparticles by Controlling Reaction Conditions

Olumurewa

2022

Preprint

Self Cite

View full text Add to dashboard Cite

In this work, a modified synthesis method was deployed to obtain nanocrystalline zinc sulfide from zinc acetate. By utilizing the hydrothermal and sol gel method, the influence of; reaction time, solvent and temperature control was used to tune the properties of zinc sulfide. Our results showed that ZnS obtained by sol gel in water + hydrothermal (ZnS (A)) typified formation of increased sulfur vacancies while an increase in reaction time resulted in decreased sulfur vacancies. The introduction of chemical defects in sol gel in methanol + KOH obtained ZnS resulted in lower grain size. We observed that crystallinity improved with increased reaction time and the introduction of KOH and methanol as solvent could shorten the reaction time required for improved crystalline property. Our result showed that reaction time influenced the dislocation density of the material to a greater extent than type of solvent used. The crystallite size estimated by Scherer formula was between the range 2.50–4.91 nm while the band gap energy of the ZnS samples were calculated in the range 3.8 eV- 4.6 eV. Utilizing this novel synthesis method can stimulate new directions in synthesizing ZnS crystals with options of choosing appropriate method for specific applications depending on properties to be traded off.

show abstract

Investigation of the thermal and light sensing properties of graphene oxide and reduced graphene oxide films obtained by spin coating method

Cited by 9 publications

References 54 publications

Dynamics of reduced graphene oxide: synthesis and structural models

Dynamics of reduced graphene oxide: synthesis and structural models

Tuning the Properties of ZnxS1-x Nanoparticles by Controlling Reaction Conditions

Tuning the Properties of ZnS1-x Nanoparticles by Controlling Reaction Conditions

Contact Info

Product

Resources

About