Exploring ZnO nanostructures with reduced graphene oxide in layer-by-layer films as supercapacitor electrodes for energy storage

Oliveira, Danilo A.; Silva, Ranilson A. da; Orlandi, Marcelo Ornaghi; Siqueira, José R.

doi:10.1007/s10853-022-07089-9

Cited by 6 publications

(7 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the consistent increase in current loading with the rise in scan rate up to 200 mV/s, as illustrated in the linear correlation in Figure B, indicates uniform deposition and stable attachment of the monolayer atop the ITO electrode. This observation agrees with previous studies, ,,− supporting an electrocapacitive energy storage mechanism and highlighting the influential role of the nanocarbon material in enhancing the electrochemical properties of the studied LB film.…”

Section: Resultssupporting

confidence: 93%

“…Furthermore, the increase in capacitance from bare ITO to SA+GO to SA+GO+CNT films underscores the influence of film organization on the electrode surface in enhancing electrocapacitive properties. 40 This effect confirms the synergistic impact of the SA+GO+CNT film, aligning with spectroscopic characterization and enzyme activity investigation.…”

Section: ■ Materials and Methodssupporting

confidence: 80%

“…Capacitance values were calculated from the CV curves according to eq . It is worth noting that for nanostructured films with low mass, considering the geometric area of the film on the electrode is more appropriate for evaluating areal capacitance in terms of F/cm 2 - particularly relevant for supercapacitor-based ultrathin films. − …”

Section: Resultsmentioning

confidence: 96%

“…The GCD curves exhibit a symmetrical triangular-shaped charge−discharge process, characteristic of an electric doublelayer supercapacitor, as illustrated in Figure 8A. 19,40 The discharge time for SA+GO+CNT and SA+GO LB films was approximately 50 and 40 s, respectively. Given that the films contain only a single monolayer, the observed difference in time can be associated with the higher surface area of the film due to the presence of CNT.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Using Carbon Nanotubes to Improve Enzyme Activity and Electroactivity of Fatty Acid Langmuir–Blodgett Film-Incorporated Galactose Oxidase for Sensing and Energy Storage Applications

Nerath,

Oliveira,

Siqueira Jr

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Incorporating enzymes into nanostructured supercapacitor devices represents a groundbreaking advancement in energy storage. Enzyme catalysis using nanomaterials enhances performance, efficiency, and stability by facilitating precise charge transfer, while the nanostructure provides a high surface area and improved conductivity. This synergy yields eco-friendly, high-performance energy storage solutions crucial for diverse applications, from portable electronics to renewable energy systems. In this study, we harnessed the versatility of Langmuir–Blodgett films to create meticulously organized thin films with specific enzyme properties, coupled with carbon nanotubes, to develop biosupercapacitors. Langmuir monolayers were constructed with stearic acid, carbon nanotubes, and galactose oxidase. Following comprehensive characterization using tensiometric, rheological, morphological, and spectroscopic techniques, the monolayers were transferred to solid supports, yielding Langmuir–Blodgett films. These films exhibited superior performance, with persisting enzyme activity. However, increasing film thickness did not enhance enzymatic activity values, indicating a surface-driven process. Subsequently, we explored the electrochemical properties of the films, revealing stability compatible with supercapacitor applications. The introduction of carbon nanotubes demonstrated a higher capacitance, indicating the potential viability of the films for energy storage applications.

show abstract

Section: Resultssupporting

confidence: 93%

Section: ■ Materials and Methodssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 96%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Using Carbon Nanotubes to Improve Enzyme Activity and Electroactivity of Fatty Acid Langmuir–Blodgett Film-Incorporated Galactose Oxidase for Sensing and Energy Storage Applications

Nerath,

Oliveira,

Siqueira Jr

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

“…118,119 There are many 2D materials with various properties, among which graphene and graphene derivatives are particularly distinguished: graphene oxide (GO), reduced graphene oxide (rGO), 14,120 and graphene nanosheets. 121 The following 2D-material are also widely used: MXenes, 122,123 metal–organic frameworks (MOFs), 124,125 transition metal dichalcogenides (TMDs), 126 covalent organic frameworks (COFs), 127 2D coordinated polymer. 128…”

Section: D Materials For Charge Storagementioning

confidence: 99%