AC conductivity studies in copper decorated and zinc oxide embedded polypyrrole composite nanorods: Interfacial effects

Megha, R.; Ravikiran, Y. T.; Kumari, Suman; Rajprakash, H. G.; Manjunatha, S.; Revanasiddappa, M.; Prashantkumar, M.; Thomas, Sabu

doi:10.1016/j.mssp.2020.104963

Cited by 25 publications

(5 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 7(b) and (h), depicts the XPS spectra of typical elements on the lubricating grease’s surfaces under a load of 15 N and a temperature of 25°C. In Figure 7(b), the presence of CuO on the worn surface is indicated by the peaks at 932.4 and 952.2 eV in the Cu 2p spectrum (Zhao et al , 2011; Megha et al , 2020). In Figure 7(c), the peak at 530.6 eV in the O 1s spectrum is attributed to metal oxides and TiO 2 (Yang et al , 2023; Xia et al , 2022), while the peak at 531.8 eV might be attributed to C–O compounds and Al 2 O 3 (Rawat et al , 2021).…”

Section: Resultsmentioning

confidence: 99%

Improving frictional and insulation performance with silica-coated titanium dioxide additives in grease

Yang,

Xia,

Chen

et al. 2024

ILT

View full text Add to dashboard Cite

Purpose The purpose of this study was to synthesize composite nanoparticles (TiO2@SiO2) via the chemical deposition method and investigate their efficacy as additives in polytetrafluoroethylene (PTFE) lubricating grease. The focus was on examining the frictional and conductive properties of the TiO2@SiO2 grease using a friction tester. Design/methodology/approach Composite nanoparticles (TiO2@SiO2) were synthesized using the chemical deposition method and incorporated into PTFE grease. Frictional and conductive properties were evaluated using a friction tester. Surface morphology and chemical composition of wear tracks were analyzed using scanning electron microscope and X-ray photoelectron spectroscopy, respectively. Findings Incorporating TiO2@SiO2 at a mass fraction of 1 Wt.% led to a significant reduction in friction coefficient and wear width. The wear depth exhibited a remarkable decrease of 260%, while the contact resistance reached its peak value. This improvement in tribological properties could be attributed to the presence of TiO2@SiO2, where TiO2 served as the core and SiO2 as the shell during the friction process. The high hardness of the SiO2 shell contributed to enhanced load-bearing capacity. In addition, the exceptional insulation properties of SiO2 demonstrated excellent electron-capturing capabilities, resulting in improved friction and insulation performance of the TiO2@SiO2 lubricating grease. Originality/value This study demonstrates the potential of TiO2@SiO2 composite nanoparticles as additives in lubricating greases, offering improved friction and insulation performance. The findings provide insights into the design of advanced lubricating materials with enhanced tribological properties and insulation capacity, contributing to the development of more efficient and durable lubrication systems.

show abstract

Section: Resultsmentioning

confidence: 99%

Improving frictional and insulation performance with silica-coated titanium dioxide additives in grease

Yang,

Xia,

Chen

et al. 2024

ILT

View full text Add to dashboard Cite

show abstract

“… 40 While, in the case of PPy, the absorption bands at 1188 and 1555 cm −1 could be attributed to N–C stretching, and the ring stretching mode of pyrrole. 41 To further confirm the existence of CPs in the as-prepared samples, the FTIR spectra of bare and modified TiO 2 were conducted as presented in Fig. 3b .…”

Section: Resultsmentioning

confidence: 99%

Efficient non-metal based conducting polymers for photocatalytic hydrogen production: comparative study between polyaniline, polypyrrole and PEDOT

et al. 2021

View full text Add to dashboard Cite

show abstract

“…More specifically, because of the high compatibility of PVP and GO and their good miscibility in water, the growth of films from such components is expected to be of great interest [3]. Nonetheless, despite recent advances in polymer graphene oxide nanocomposites, incorporation of metals or metal oxides, carbon nanomaterials, and polymers into the polymer matrix has been sought to improve their properties because of synergistic effects [9,10]. These hybrid nanocomposites also help to minimize some of the drawbacks experienced in polymer based devises like low chemical stability and mechanical properties [11,12].…”

Section: Introductionmentioning

confidence: 99%

Optical and structural properties of graphene oxide-incorporated polyvinylpyrrolidone/copper ternary nanocomposites (PVP/Cu/GO) films

et al. 2023

View full text Add to dashboard Cite

Novel ternary nanocomposite films based on polyvinylpyrrolidone copper nanoparticles graphene oxide (PVP/Cu/GO) were prepared using electrochemical deposition technique on Fluorine doped tin oxide (FTO) substrate. This facile and effective approach has been proven to be very useful for the fabrication of inexpensive, high-performance electrochemical devices. To achieve uniform deposition of the nanocomposite films, the three components of the nanocomposites were mixed under controlled conditions. The impact of different GO loading on the PVP/Cu/GO composites was measured using UV–visible spectroscopy, X-Ray Diffraction (XRD) spectroscopy, SEM, EDX, and four-point probe techniques to evaluate their optical, structural, morphological, compositional, and electrical properties, respectively. UV-visible analysis shows that the optical band gap (Eg) of the nanocomposite decreased from 3.51 to 2.02 eV with increasing GO loading. All of the nanocomposites showed UV absorbance of ≈450 nm. According to the XRD results, the GO materials were very well dispersed in the PVP/Cu/GO composites, while also revealing the crystalline nature of the nanocomposites. The SEM results revealed spherical-shaped grains of the deposited films, while the EDX results revealed the major elements deposited. Four-point probe analysis of the nanocomposites revealed slight increase in conductivity with low GO content, thus confirming the semiconducting properties of the nanocomposites with the GO content. The obtained results herein shows that the PVP/Cu/GO nanocomposites are successfully synthesized with attractive physiochemical properties suitable for the fabrication of organic electronic devices and photovoltaic devices.

show abstract

AC conductivity studies in copper decorated and zinc oxide embedded polypyrrole composite nanorods: Interfacial effects

Cited by 25 publications

References 42 publications

Improving frictional and insulation performance with silica-coated titanium dioxide additives in grease

Improving frictional and insulation performance with silica-coated titanium dioxide additives in grease

Efficient non-metal based conducting polymers for photocatalytic hydrogen production: comparative study between polyaniline, polypyrrole and PEDOT

Optical and structural properties of graphene oxide-incorporated polyvinylpyrrolidone/copper ternary nanocomposites (PVP/Cu/GO) films

Contact Info

Product

Resources

About