Synergistic effect of Fe2O3 and CeO2 co-modified titanate nanosheet heterojunction on enhanced photocatalytic degradation

Zhao, Xiaona; Wu, Pei; Lu, Dingze; Fang, Pengfei; Liu, Min; Zhang, Qian

doi:10.1007/s11051-017-4013-5

Cited by 8 publications

(3 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In short, the surface hydroxyl groups of the photocatalysts play a vital role in its adsorption and photocatalytic studies, and abundant hydroxyl groups enhance the photoactivity. The shift in XPS spectra may be due to the formation of new bonds/impurities, which results in to the improved surface acidity and hence the polar organic dyes might be easily adsorbed on the surface of the sample 29,39 .…”

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

Self Cite

119

View full text Add to dashboard Cite

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.

show abstract

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

Self Cite

119

View full text Add to dashboard Cite

show abstract

“…The electrons present in the conduction band of TiO 2 can jump into the conduction band of WO 3 until the conduction band level of the latter raises to an equilibrium state, where the Fermi levels of these two metal oxides coincide. The coupled heterojunction in the shell structure can facilitate separation of the excitons. − An enhanced separation of charge carriers can be enabled with anatase TiO 2 present in the core structure of the catalyst . Subsequently, the electrons can migrate to the surface of the photocatalyst and assist the splitting of water, leading to hydrogen generation.…”

Section: Results and Discussionmentioning

confidence: 99%

In Situ Surface Decoration of a Titanium Nanosubstrate by a TiO₂–WO₃ Composite

Krishnan

Shibli

2018

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

An efficient TiO2 core/TiO2–WO3 shell structured nanocomposite is successfully synthesized by a method of acid precipitation followed by thermal decomposition. The metal weight ratio of TiO2–WO3 is optimized in order to achieve visible-light absorption. We made the mixed-oxide composite on titanium metal turnings in order to enhance the active surface area available for water-splitting reaction. The novelty of the present work mainly lies on the utterly different approach that we adopt for tuning of the composite with titanium turnings as the major material. The structural and morphological changes in the mixed oxide on the turnings are characterized in detail based on X-ray diffraction, Fourier transform infrared, transmission electron microscopy, scanning electron microscopy–energy-dispersive X-ray analysis, and Raman spectroscopy. The enhanced surface properties are evaluated based on Brunauer–Emmett–Teller adsorption. The band-edge position, band gap, and range of light absorption are envisaged by UV–visible spectroscopy. The photocatalytic activity of the composite is evaluated under visible-light irradiation. The volume of hydrogen gas evolved during water-splitting reaction is quantified after confirming the purity of the evolved hydrogen by gas chromatography. The mechanism of the enhanced water-splitting process by the fabricated photocatalytic system is then depicted. An appreciable quantity of pure hydrogen is produced by the catalyst composite, the stability and reproducibility of which is further ascertained by different experiments.

show abstract

“…Consequently, the porosity of the surface increased, which facilitated greater contact between the active reactants. It is worth noting that this porous structure amplifies the surface area and creates additional pathways for charge carrier transfer, ultimately improving its photocatalytic activity [107]. Elemental mapping was utilized to confirm the steady distribution of elements on the α-Fe2O3-CeO2@Au nanocomposite.…”

Section: Sem Mapping and Edx Analysismentioning

confidence: 99%

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Alshammari,

Kosa,

Patel

et al. 2024

Water

View full text Add to dashboard Cite

Developing photocatalytic nanomaterials with unique physical and chemical features using low-cost and eco-friendly synthetic methods is highly desirable in wastewater treatment. In this work, the magnetically separable α-Fe2O3-CeO2 nanocomposite (NC), with its respective metal oxides of α-Fe2O3 and CeO2 nanoparticles, was synthesized using a combination of hexadecyltrimethylammonium bromide (CATB) and ascorbic acid via the hydrothermal method. To tune the band gap, the heterojunction nanocomposite of α-Fe2O3-CeO2 was decorated with plasmonic Au nanoparticles (Au NPs). The various characterization methods, such as FTIR, UV-vis DRS, XRD, XPS, TEM, EDX, SEM, and PL, were used to determine the properties of the materials, including their morphology, elemental composition, optical properties, band gap energy, and crystalline phase. The nanocomposite of α-Fe2O3-CeO2@Au was utilized to remove Rose Bengal (RB) dye from wastewater using a photocatalytic technique when exposed to visible light. A comprehensive investigation of the impact of the catalyst concentration and initial dye concentration was conducted to establish the optimal photodegradation conditions. The maximum photocatalytic efficiency of α-Fe2O3-CeO2@Au (50 mg L−1) for RB (20 ppm) dye removal was found to be 88.9% in 120 min under visible-light irradiation at a neutral pH of 7 and 30 °C. Various scavengers, such as benzoquinone (BQ; 0.5 mM), tert-butyl alcohol (TBA; 0.5 mM), and ethylenediaminetetraacetic acid (EDTA; 0.5 mM), were used to investigate the effects of different free radicals on the photocatalytic process. Furthermore, the reusability of the α-Fe2O3-CeO2@Au photocatalyst has also been explored. Furthermore, the investigation of the potential mechanism demonstrated that the heterojunction formed between α-Fe2O3 and CeO2, in combination with the presence of deposited Au NPs, led to an enhanced photocatalytic efficiency by effectively separating the photogenerated electron (e−)–hole (h+) pairs.

show abstract

Synergistic effect of Fe2O3 and CeO2 co-modified titanate nanosheet heterojunction on enhanced photocatalytic degradation

Cited by 8 publications

References 50 publications

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

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

In Situ Surface Decoration of a Titanium Nanosubstrate by a TiO₂–WO₃ Composite

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Contact Info

Product

Resources

About

Synergistic effect of Fe2O3 and CeO2 co-modified titanate nanosheet heterojunction on enhanced photocatalytic degradation

Cited by 8 publications

References 50 publications

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

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

In Situ Surface Decoration of a Titanium Nanosubstrate by a TiO2–WO3 Composite

Heterojunction-Based Photocatalytic Degradation of Rose Bengal Dye via Gold-Decorated α-Fe2O3-CeO2 Nanocomposites under Visible-Light Irradiation

Contact Info

Product

Resources

About

In Situ Surface Decoration of a Titanium Nanosubstrate by a TiO₂–WO₃ Composite