Visible light activity of rare earth metal doped (Er3+, Yb3+ or Er3+/Yb3+) titania photocatalysts

Reszczyńska, Joanna; Grzyb, Tomasz; Sobczak, Janusz W.; Lisowski, Wojciech; Gazda, Maria; Ohtani, Bunsho; Zaleska, Adriana

doi:10.1016/j.apcatb.2014.07.010

Cited by 314 publications

(128 citation statements)

References 73 publications

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“…Phenol was selected as a model pollutant because it is a nonvolatile and common contaminant present in industrial wastewaters [42]. Terephthalic acid reacts with hydroxyl radicals to form highly fluorescent product: 2-hydroxyterephthalic acid.…”

Section: Measurement Of Photocatalytic Activitymentioning

confidence: 99%

Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant

Mazierski

Nischk

Gołkowska

et al. 2016

Applied Catalysis B: Environmental

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118

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Section: Measurement Of Photocatalytic Activitymentioning

confidence: 99%

Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant

Mazierski

Nischk

Gołkowska

et al. 2016

Applied Catalysis B: Environmental

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118

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“…However, the activity of TiO2 is hindered by two factors; a wide band gap which restricts its activity to only UV light, and fast charge recombination leading to few surface reactions occurring. Much work has been devoted to overcoming both these problems including tuning the nanostructure of TiO2 itself [8][9][10] , doping with non-metals [11][12][13] , metals 14 and combinations of two [15][16][17] or even more 18 dopants, introduction of plasmonic metal nanoparticles 19,20 and formation of nanocomposites with conductive organic nanomaterials 21,22 . Furthermore, two or more of these methods are often combined to produce high activity photocatalysts 23 .…”

Section: Introductionmentioning

confidence: 99%

BiVO₄‐TiO₂ Composite Photocatalysts for Dye Degradation Formed Using the SILAR Method

Odling

Robertson

2016

ChemPhysChem

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Composite photocatalyst films have been fabricated by depositing BiVO4 upon TiO2 via a sequential ionic layer adsorption reaction (SILAR) method. The photocatalytic materials were investigated by XRD, TEM, UV/Vis diffuse reflectance, inductively coupled plasma optical emission spectrometry (ICP-OES), XPS, photoluminescence and Mott-Schottky analyses. SILAR processing was found to deposit monoclinic-scheelite BiVO4 nanoparticles onto the surface, giving successive improvements in the films' visible light harvesting. Electrochemical and valence band XPS studies revealed that the prepared heterojunctions have a type II band structure, with the BiVO4 conduction band and valence band lying cathodically shifted from those of TiO2 . The photocatalytic activity of the films was measured by the decolourisation of the dye rhodamine 6G using λ>400 nm visible light. It was found that five SILAR cycles was optimal, with a pseudo-first-order rate constant of 0.004 min(-1) . As a reference material, the same SILAR modification has been made to an inactive wide-band-gap ZrO2 film, where the mismatch of conduction and valence band energies disallows charge separation. The photocatalytic activity of the BiVO4 -ZrO2 system was found to be significantly reduced, highlighting the importance of charge separation across the interface. The mechanism of action of the photocatalysts has also been investigated, in particular the effect of self-sensitisation by the model organic dye and the ability of the dye to inject electrons into the photocatalyst's conduction band.

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“…Efficient utilisation of visible light would enable the exploitation of sunlight as a source of energy, which consists of about 40% visible light. Generally, strategies such as doping the semiconductor with metal ions (alkali, alkaline earth, noble, rare earth, and transition metals) [43][44][45][46][47], non-metal ions (oxygen, sulphur, nitrogen, phosphorus, halogens, carbon, and boron) [48][49][50][51], codoping/multidoping (metal + metal, non-metal + metal, non-metal + non-metal) [52][53][54][55], coupling semiconductors with carbon nanomaterials (reduce graphene oxide (RGO), graphene oxide (GO), multiwalled carbon nanotubes (MWCNTs), single-walled carbon nanotubes (SWCNTs), carbon nanospheres (CNS), fullerenes, etc.) [56][57][58][59], sensitisation (dye, polymer and surface complex sensitisation) [60][61][62], and coupling two or more semiconductors [63][64][65] have been extensively investigated for improving the photocatalytic activity of various semiconductors.…”

Section: Introductionmentioning

confidence: 99%

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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Visible light activity of rare earth metal doped (Er3+, Yb3+ or Er3+/Yb3+) titania photocatalysts

Cited by 314 publications

References 73 publications

Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant

Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant

BiVO₄‐TiO₂ Composite Photocatalysts for Dye Degradation Formed Using the SILAR Method

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

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Visible light activity of rare earth metal doped (Er3+, Yb3+ or Er3+/Yb3+) titania photocatalysts

Cited by 314 publications

References 73 publications

Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant

Photocatalytic activity of nitrogen doped TiO2 nanotubes prepared by anodic oxidation: The effect of applied voltage, anodization time and amount of nitrogen dopant

BiVO4‐TiO2 Composite Photocatalysts for Dye Degradation Formed Using the SILAR Method

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

Contact Info

Product

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About

BiVO₄‐TiO₂ Composite Photocatalysts for Dye Degradation Formed Using the SILAR Method