The effect of Fe doping on the suppression of photocatalytic activity of ZnO nanopowder for the application in sunscreens

Le, Trieu Hung; Bui, Anh Tuan; Lê, Tiến Khoa

doi:10.1016/j.powtec.2014.08.043

Cited by 37 publications

(19 citation statements)

References 17 publications

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“…Similar to the other metal doping, there are also some reports showing that Fe doping reduces photocatalytic activity [19,129,131]. In these reports, defects, crystal distortion, and also high concentration of Fe-induced mid-gap states have been correlated to the reduction of doped ZnO photocatalytic activity.…”

Section: Co-doped Znomentioning

confidence: 86%

“…Johnson et al [128] showed experimentally that alignment of these transition levels depends strongly on both Co 2+ concentrations and the growth temperature. They found that 4 show strong influence on the nanostructure morphologies and commonly reduce the crystallite and particle sizes with higher surface area [95,[131][132][133][134]. In addition, Fe incorporation in ZnO crystal lattice induces defects, especially increases oxygen vacancies.…”

Section: Co-doped Znomentioning

confidence: 99%

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Recent progress on doped ZnO nanostructures for visible-light photocatalysis

et al. 2016

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Global environmental pollution and energy supply demand have been regarded as important concerns in recent years. Metal oxide semiconductor photocatalysts is a promising approach to apply environmental remediation as well as fuel generation from water splitting and carbon dioxide reduction. ZnO nanostructures have been shown promising photocatalytic activities due to their non-toxic, inexpensive, and highly efficient nature. However, its wide band gap hinders photo-excitation for practical photocatalytic applications under solar light as an abundant, clean and safe energy source. To overcome this barrier, many strategies have been developed in the last decade to apply ZnO nanostructured photocatalysts under visible light. In this review, we have classified different approaches to activate ZnO as a photocatalyst in visible-light spectrum. Utilization of various nonmetals, transition metals and rare-earth metals for doping in ZnO crystal lattice to create visible-light-responsive doped ZnO photocatalysts is discussed. Generation of localized energy levels within the gap in doped ZnO nanostructures have played an important role in effective photocatalytic reaction under visible-light irradiation. The effect of dopant type, ionic size and its concentration on the crystal structure, electronic property and morphology of doped ZnO with a narrower band gap is reviewed systematically. Finally, a comparative study is performed to evaluate two classes of metals and nonmetals as useful dopants for ZnO nanostructured photocatalysts under visible light.

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Section: Co-doped Znomentioning

confidence: 86%

Section: Co-doped Znomentioning

confidence: 99%

Recent progress on doped ZnO nanostructures for visible-light photocatalysis

et al. 2016

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“…As per the literature, Fe/ZnO and Cd/ZnO nanostructures reveal their ability to remove organic pollutants 20,40 . However, when Fe species and Cd species are co-doped into ZnO site to form the ZFC-x, its photocatalytic activity enhances in comparison to Fe/ZnO, Cd/ZnO and ZnO samples 22,41,42 . Under visible light irradiation, all ZFC-x photocatalysts show photocatalytic performance higher than that of pure ZnO.…”

Section: Resultsmentioning

confidence: 99%

Enhanced visible light photodegradation activity of RhB/MB from aqueous solution using nanosized novel Fe-Cd co-modified ZnO

Neena

Kondamareddy

Han

et al. 2018

Sci Rep

119

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A series of novel Fe-Cd co-doped ZnO nanoparticle based photocatalysts are successfully synthesized by sol-gel route and characterized using scanning electron microscopy (SEM), energy dispersive X-ray emission (EDX), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-Vis spectroscopy, X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) techniques. The photocatalytic activity of ZnO nanoparticles doped with various atomic weight fraction of Fe and Cd has been investigated under visible light irradiation using the Methylene Blue and Rhodamine B dye in aqueous solution. The FeCd (2%):ZnO (ZFC-1) exhibit the highest photocatalytic activity in terms of rate constant as KMB = 0.01153 min−1 and KRhB = 0.00916 min−1). Further, the re-usability of the ZFC-1 photocatalyst is studied which confirms that it can be reused up to five times with nearly negligible loss of the photocatalytic efficiency. Moreover, the role of photoactive species investigated using a radical scavenger technique. The present investigations show that the doping concentration plays significant role in photocatalytic performance. The visible light absorption shown by Fe-Cd co-doped ZnO nanoparticles is much higher than that of undoped body probably due to co-doping, and the charge carrier recombination is decreased effectively which yields a higher photocatalytic performance. The mechanism for the enhancement of photocatalytic activity under visible light irradiation is also proposed.

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“…The formed lattice defects act as recombination centers, promoting the recombination of photoinduced pairs and suppressing the photocatalytic activity. 23,48,49 In contrast, from Fig. 8(b), it is clear that the PL intensities of 1% Fe-TiO 2 and 1% Ag/1% Fe-TiO 2 are lower than that of pure TiO 2 , proving that the addition of Fe is benecial to decreasing the recombination.…”

Section: Pl Spectramentioning

confidence: 88%

Effects of Ag⁰-modification and Fe³⁺-doping on the structural, optical and photocatalytic properties of TiO₂

Zhu

Yin

et al. 2019

RSC Adv.

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The effect of Fe doping on the suppression of photocatalytic activity of ZnO nanopowder for the application in sunscreens

Cited by 37 publications

References 17 publications

Recent progress on doped ZnO nanostructures for visible-light photocatalysis

Recent progress on doped ZnO nanostructures for visible-light photocatalysis

Enhanced visible light photodegradation activity of RhB/MB from aqueous solution using nanosized novel Fe-Cd co-modified ZnO

Effects of Ag⁰-modification and Fe³⁺-doping on the structural, optical and photocatalytic properties of TiO₂

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The effect of Fe doping on the suppression of photocatalytic activity of ZnO nanopowder for the application in sunscreens

Cited by 37 publications

References 17 publications

Recent progress on doped ZnO nanostructures for visible-light photocatalysis

Recent progress on doped ZnO nanostructures for visible-light photocatalysis

Enhanced visible light photodegradation activity of RhB/MB from aqueous solution using nanosized novel Fe-Cd co-modified ZnO

Effects of Ag0-modification and Fe3+-doping on the structural, optical and photocatalytic properties of TiO2

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Effects of Ag⁰-modification and Fe³⁺-doping on the structural, optical and photocatalytic properties of TiO₂