Studies of surface morphology and optical properties of ZnO nanostructures grown on different molarities of TiO2 seed layer

Asib, N. A. M.; Afaah, A.N.; Aadila, A.; Rusop, M.; Khusaimi, Z.

doi:10.1063/1.4948871

Cited by 5 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The allowed direct band gap of differently prepared ZnO nanostructures is calculated and found to be between (3.15-3.22 eV), which is lower than the reported standard band gap energy for ZnO nanoparticles (3.37 eV). Moreover, it can be seen that as the crystal size decreases, an increase in the band gap energy was observed, which could be attributed to the quantum confinement effect [47]. The results are also tabulated in Table 2.…”

Section: Structural and Morphological Analysismentioning

confidence: 85%

See 1 more Smart Citation

Stimulated generation of photobiogas by morphologically tuned nanostructured ZnO and ZnO/TiO2

et al. 2022

View full text Add to dashboard Cite

The photocatalytic degradation (PCD) of ethanol in an inert atmosphere on catalysis was explored in a lab-scale experiment. A morphologically tuned nanostructured controlled ZnO and ZnO/TiO2 nanocomposites were synthesized using a simple hydrothermal process under the control of several functionally capping agents marking a milestone in photocatalysis. It is possible that this could be modified to produce photobiogas out of organic dye pollution. The photocatalysts were characterized by the use of X-ray diffraction (XRD), transmission electron microscopy (TEM), Brunauer, Emmett, and Teller (BET) surface area analyzer, Scanning electron microscope (SEM-EDX), and UV–Vis absorption spectroscopy. The photocatalytic activity of the ZnO and ZnO–TiO2 composite nanostructures was evaluated for the photodegradation of the Tartrazine (Tr) dye aqueous solution. Where the composite matrix exhibits higher photocatalytic activity than pure ZnO nanomaterials as a result of the synergistic interaction between ZnO and TiO2 particles. This is mainly due to its higher surface area than pure ZnO. Moreover, the photocatalytic activity of the tuned nanostructured materials is found to be enhanced by the effect of the capping agent and controlling the morphology. This increase is accompanied by a significant shift in surface shape and band gap energy. According to the findings, the designed morphologies of pure ZnO photocatalyst impacted the formation of photobiogas from the photocatalytic decomposition of ethanol as a model of organic pollutants in wastewater. However, when using composite ZnO/TiO2 photocatalysts, the rate of CH4 formation is significantly lower than when using ZnO photocatalysts alone. This may be attributed to the synergetic effect between ZnO and TiO2 particles which leads to a remarkable reduction in the newly formed band gap energy. This may result in a fast rate of recombination between the photogenerated charge carriers (e− and h+).

show abstract

Section: Structural and Morphological Analysismentioning

confidence: 85%

“…In general, it has been observed that the band gap energy of the composite structures is lower than that of pure ZnO structures prepared under the same conditions. This could be attributed to the synergistic effect between the conduction band of TiO 2 and that of ZnO [47,48].…”

Section: Structural and Morphological Analysismentioning

confidence: 99%

Stimulated generation of photobiogas by morphologically tuned nanostructured ZnO and ZnO/TiO2

et al. 2022

View full text Add to dashboard Cite

show abstract

“…An excitonic peak in the ultraviolet and an absorption in the visible light spectrums clearly show the activity of the ZnO nanoparticles in these two light spectral areas. Its a great material for photovoltaic applications because of its low UV area transparency and high visible spectrum transparency [37]. The absence of additional peaks suggests that the ZnO that was produced has better optical characteristics.…”

Section: Uv-visible Absorption Spectrum Of Znonps and Ac@znomentioning

confidence: 99%

Photocatalytic and Adsorption Performance of Averrhoa carambola Leaf mediated AC@ZnO Nanomaterial: A green approach

Devi,

Ani

2024

Preprint

View full text Add to dashboard Cite

Averrhoa carambola L. leaf extract was used in this study to synthesis zinc oxide nanoparticles and activated carbon loaded zinc oxide. The prepared nanomaterial was used as a photocatalytic degradation and biosorbent to remove the cationic dye, Methylene Blue (MB) from aqueous solutions. UV-visible spectroscopy, X-ray diffraction, and FTIR were used to confirm the formation of zinc oxide nanoparticles and AC@ZnO. The experimental procedure involved a batch adsorption process, wherein several key parameters such as contact time, biosorbent dosage, dye concentration, and pH were systematically varied to investigate their impact on both photocatalytic and adsorption capacities. The MB may bond more successfully in an alkaline pH environment. When tested the Boyd, intra particle diffusion, and pseudo-second order kinetic models accurately represented the adsorption kinetics. The equilibrium data were modelled with the Harkins-Jura, Freundlich, D-R, and Langmuir isotherms. In comparison to ZnO NPs, the AC@ZnO sample has higher photocatalytic activity, as evidenced by the photocatalytic degradation of MB dye and the results. AC@ZnO out performed ZnO in terms of both adsorption and photocatalytic degradation. These findings show the cooperative action of ZnO (photocatalysts) and AC (adsorption) in the synthesis of the AC@ZnO sample. The results provide conclusive proof that AC@ZnONps is an effective material for removing MB dye from waste water.

show abstract

Tuning the TiO2/ZnO heterostructures emissions through nickel doping for intriguing optoelectronic and photonic applications

Haimeur,

Hammi,

Sánchez

et al. 2023

Opt Quant Electron

View full text Add to dashboard Cite

Studies of surface morphology and optical properties of ZnO nanostructures grown on different molarities of TiO2 seed layer

Cited by 5 publications

References 17 publications

Stimulated generation of photobiogas by morphologically tuned nanostructured ZnO and ZnO/TiO2

Stimulated generation of photobiogas by morphologically tuned nanostructured ZnO and ZnO/TiO2

Photocatalytic and Adsorption Performance of Averrhoa carambola Leaf mediated AC@ZnO Nanomaterial: A green approach

Tuning the TiO2/ZnO heterostructures emissions through nickel doping for intriguing optoelectronic and photonic applications

Contact Info

Product

Resources

About