Hydrothermal synthesis of magnetic CoFe2O4/graphene nanocomposites with improved photocatalytic activity

Gan, Lu; Shang, Songmin; Yuen, C.W.M.; Hu, Enling

doi:10.1016/j.apsusc.2015.05.130

Cited by 92 publications

(35 citation statements)

References 38 publications

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“…Hydrothermally prepared magnetic CoFe 2 O 4 /graphene (GR) nanocomposites with varying GR loadings exhibited improved visible light photocatalytic properties towards MB degradation compared to pristine CoFe 2 O 4 . At an optimum GR loading of 10%, the nanocomposite reached 100% MB degradation in 60 min, while the neat CoFe 2 O 4 could only manage a low 34% degradation in twice the irradiation time [192]. The enhanced activity could be ascribed to the formation of heterojunctions between CoFe 2 O 4 and GR, which allowed for the efficient separation of the charge carriers.…”

Section: Magnetite (Fe 3 O 4 )-Based Magnetic Photocatalystsmentioning

confidence: 83%

“…The enhanced activity could be ascribed to the formation of heterojunctions between CoFe 2 O 4 and GR, which allowed for the efficient separation of the charge carriers. Upon excitation by visible light, the electrons in the conduction band of CoFe 2 O 4 transfer to GR, where they are trapped by molecular oxygen adsorbed on the surface [192]. A similar scenario was highlighted as responsible for the improved activity of CoFe 2 O 4 -PANI, whereby the electrons are transferred to the conduction band of CoFe 2 O 4 from PANI while the holes transfer in the opposite direction to PANI [61].…”

Section: Magnetite (Fe 3 O 4 )-Based Magnetic Photocatalystsmentioning

confidence: 96%

“…Pristine CoFe 2 O 4 shows poor photocatalytic efficiency due to the high recombination rate of the charge carriers [61,192,193]. Kim et al prepared hollow cobalt ferrite-polyaniline (CoFe 2 O 4 -PANI) nanofibres using the electrospinning method, calcination, and in situ chemical oxidative polymerisation, in succession.…”

Section: Magnetite (Fe 3 O 4 )-Based Magnetic Photocatalystsmentioning

confidence: 99%

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Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Mamba

Mishra

2016

Catalysts

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Organic and inorganic compounds utilised at different stages of various industrial processes are lost into effluent water and eventually find their way into fresh water sources where they cause devastating effects on the ecosystem due to their stability, toxicity, and non-biodegradable nature. Semiconductor photocatalysis has been highlighted as a promising technology for the treatment of water laden with organic, inorganic, and microbial pollutants. However, these semiconductor photocatalysts are applied in powdered form, which makes separation and recycling after treatment extremely difficult. This not only leads to loss of the photocatalyst but also to secondary pollution by the photocatalyst particles. The introduction of various magnetic nanoparticles such as magnetite, maghemite, ferrites, etc. into the photocatalyst matrix has recently become an area of intense research because it allows for the easy separation of the photocatalyst from the treated water using an external magnetic field. Herein, we discuss the recent developments in terms of synthesis and photocatalytic properties of magnetically separable nanocomposites towards water treatment. The influence of the magnetic nanoparticles in the optical properties, charge transfer mechanism, and overall photocatalytic activity is deliberated based on selected results. We conclude the review by providing summary remarks on the successes of magnetic photocatalysts and present some of the future challenges regarding the exploitation of these materials in water treatment.

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Section: Magnetite (Fe 3 O 4 )-Based Magnetic Photocatalystsmentioning

confidence: 83%

Section: Magnetite (Fe 3 O 4 )-Based Magnetic Photocatalystsmentioning

confidence: 96%

Section: Magnetite (Fe 3 O 4 )-Based Magnetic Photocatalystsmentioning

confidence: 99%

See 1 more Smart Citation

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Mamba

Mishra

2016

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“…Several groups have prepared the cobalt ferrite/graphene nanocomposites using different methods and investigated the application potentials of the obtained nanocomposites in many fields [23][24][25]. To the best of our knowledge, this is the first report on magnetorheological performances of the ferrofluid based on GO nanosheets decorated with CoFe 2 O 4 nanoparticles (CoFe 2 O 4 /GO).…”

Section: Introductionmentioning

confidence: 94%

Facile synthesis and magnetorheological properties of superparamagnetic CoFe2O4/GO nanocomposites

Wang

Dong

et al. 2015

Applied Surface Science

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“…One of the applications of the graphene is to be incorporated into the photocatalysts to serve as the catalyst carrier to enhance the catalytic efficiency of the photocatalysts [6,7]. In recent years, it has been found from abundant attempts that the graphene incorporated composites could effectively improve photocatalysis capabilities of the pristine semiconductor metal oxides and metal salts [8].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Petaloid BiOCl/Graphene Composite with Enhanced Photocatalytic Properties for the Degradation of Organic Dyes

Sun¹,

Wang²,

Wang³

et al. 2017

dtmse

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Abstract. In the present study, the BiOCl/graphene composites were prepared through an in-situ hydrothermal process. The structure of the composites were studied and the photocatalytic performance of the composites were specifically investigated in detail through degrading organic dye pollutants. The results showed that the prepared BiOCl/graphene composites showed a petaloid shape and the graphene sheets were uniformly dispersed within the BiOCl petals. Additionally, the results also showed that compared with the pristine BiOCl, the BiOCl/graphene composites had a much higher degradation efficiency to methylene blue and rhodamine B dyes. The present study provides a novel and effective photocatalyst which could be potentially applied in the photocatalytic degradation of organic pollutants.

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Hydrothermal synthesis of magnetic CoFe2O4/graphene nanocomposites with improved photocatalytic activity

Cited by 92 publications

References 38 publications

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Facile synthesis and magnetorheological properties of superparamagnetic CoFe2O4/GO nanocomposites

Preparation of Petaloid BiOCl/Graphene Composite with Enhanced Photocatalytic Properties for the Degradation of Organic Dyes

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