Effect of Sn doping in ZnO on the photocatalytic activity of ZnO-Graphene nanocomposite with improved activity

Beura, Rosalin; Thangadurai, P.

doi:10.1016/j.jece.2018.07.049

Cited by 47 publications

(12 citation statements)

References 59 publications

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Section: Optical Absorptionmentioning

confidence: 93%

“…The absorption spectra of the ZnO0.8/TiC0.2 and ZnO0.7/TiC0.3 composites also demonstrated the steady enhancement in the optical absorption with an obvious red shift towards the visible zone. Moreover, the absorption edge of the ZnO0.6/TiC0.4 composite showed a blue shift compared to the ZnO0.7/TiC0.3 composite because of the synergism between ZnO and Ti3C2 [30]. The Tauc graphs: (α hV) 1/n vs. hV (h: Planck constant, V: frequency, α = ( ) is the absorption coefficient and n: 1 for the direct band gap (ZnO) and 2 for the indirect band gap (Ti3C2), respectively) drawn from the UV-Vis absorption data were used for further examination of the as-prepared composites [31].…”

Section: Optical Absorptionmentioning

confidence: 95%

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Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

et al. 2022

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The development of cost-effective co-catalysts of high photocatalytic activity and recyclability is still a challenge in the energy transformation domain. In this study, 0D/2D Schottky heterojunctions, consisting of 0D ZnO and 2D Ti3C2, were successfully synthesized by the electrostatic self-assembling of ZnO nanoparticles on Ti3C2 nanosheets. In constructing these heterojunctions, Ti3C2 nanosheets acted as a co-catalyst for enhancing the transfer of excitons and their separation to support the photocatalytic response of ZnO. The as-prepared ZnO/Ti3C2 composites demonstrate an abbreviated charge transit channel, a huge interfacial contact area and the interfacial electrons’ transport potential. The extended optical response and large reactive area of the ZnO/Ti3C2 composite promoted the formation of excitons and reactive sites on the photocatalyst’s surface. The ZnO/Ti3C2 Schottky heterojunction showed significantly high photocatalytic activity for hydrogen production from a water–ethanol solution under the light illumination in the visible region. The hydrogen evolution overoptimized the ZnO/Ti3C2 composition with 30 wt.% of Ti3C2, which was eight times higher than the pristine ZnO. These findings can be helpful in developing 0D/2D heterojunction systems for photocatalytic applications by utilizing Ti3C2 as a low-cost co-catalyst.

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Section: Optical Absorptionmentioning

confidence: 93%

Section: Optical Absorptionmentioning

confidence: 95%

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

et al. 2022

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“…17% of MO was degraded under UV, whereas MB was 100% MO 75% MO, 25% MB 50% MO, 50% MB 25% MO, 75% MB 100% MB Fig. 16 Interference by mixture of dyes evaluated by UV-Vis spectra after 30 min of photodegradation of solutions of MO and MB in different mass concentrations of each dye: (pure MO) 40 mg/dm 3 , 75% MO-25% MB, 50% MO-50% MB, 25% MO-75% MB, (pure MB) 40 mg/dm 3 simultaneously degraded with 78% efficiency under UV (Beura and Thangadurai 2018).…”

Section: Effect Of Type Of Dye On Photocatalytic Performancementioning

confidence: 99%

Photocatalytic properties of zirconium oxide–zinc oxide nanoparticles synthesised using microwave irradiation

2019

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ZrO 2-ZnO nanoparticles with different mass concentrations of ZrO 2 (1%, 5%, 10%, 20%) were prepared using a two-stage precipitation method with microwave irradiation. The ZrO 2-ZnO with 10% of ZrO 2 had the highest photocatalytic activity. The obtained material was characterised using XRD, which confirmed a high crystal structure in the synthesised material, and transmission electron microscopy (TEM) analysis, which depicted that micro and nano needle-shaped particles had been obtained and that irregularly shaped nanoparticles were present on the surface of those particles. TEM-EDX analysis confirmed the presence of both ZnO and ZrO 2 in the product. FT-IR analyses showed that the positions of peaks related to Zn-O and Zr-O absorption bands did not change in ZrO 2-ZnO NPs. The initial concentration of Methylene Blue (MB), the pH of the solution, and the mass of the photocatalyst were investigated to determine the photocatalytic efficiency of the material and the degree of removal of the MB. The highest efficiency (97%) was obtained in the following conditions: 30 mg/ dm 3 of the MB solution, pH 9 and 70 mg ZrO 2-ZnO after 30 min of reaction time under UV irradiation.

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“…37 It is noteworthy that ZnO-GO/CGH exhibits very strong absorption in both ultraviolet and visible light. Because enhanced absorption results in more electron-hole pairs and higher photocatalytic activity, 43 this increased absorption improves the photocatalytic activity of ZnO-GO/CGH. To further explain the photocatalytic mechanism of ZnO-GO composites, the photocurrent response test was performed.…”

Section: Structural and Morphology Analysis Of Zno-go/cghmentioning

confidence: 99%

In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue

Guo

Zhu

et al. 2019

RSC Adv.

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Effect of Sn doping in ZnO on the photocatalytic activity of ZnO-Graphene nanocomposite with improved activity

Cited by 47 publications

References 59 publications

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

Construction of 0D/2D Schottky Heterojunctions of ZnO and Ti3C2 Nanosheets with the Enriched Transfer of Interfacial Charges for Photocatalytic Hydrogen Evolution

Photocatalytic properties of zirconium oxide–zinc oxide nanoparticles synthesised using microwave irradiation

In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue

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