Europium doped nanocrystalline titanium dioxide: preparation, phase transformation and photocatalytic properties

Zhang, Yuhong; Zhang, Huaxing; Xu, Yuchen; Wang, Yanguang

doi:10.1039/b305538h

Cited by 113 publications

(62 citation statements)

References 36 publications

(30 reference statements)

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“…Thus, the incorporation of the rare earth ions into TiO 2 crystalline matrices could provide a potential means to inhibit the combination of photohole and photoelectron pairs and to enlarge the light adsorption of the semiconductor, and therefore to enhance the visible light photocatalytic activity, such as Eu-TiO 2 nanocrystalline [10], Ln 2 O 3 /TiO 2 (Ln = Eu, Pr, or Yb) [11], La-TiO 2 , Pr-TiO 2 , Nd-TiO 2 [12], N-Ce/TiO 2 [13].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of photocatalytic activity of nano-scale TiO2 particles co-doped by rare earth elements and heteropolyacids

Shi

Zhang

et al. 2012

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 99%

Enhancement of photocatalytic activity of nano-scale TiO2 particles co-doped by rare earth elements and heteropolyacids

Shi

Zhang

et al. 2012

Journal of Colloid and Interface Science

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“…The process was completed when the reaction slurry color turned from colorless to light yellow. Then, 5 g of TiO 2 powder was added to the CeO 2 slurry and stirred for 5 hours. The slurry was filtered, dried at 100 °C overnight and calcined at 500 °C for 4 hours.…”

Section: Catalyst Preparationmentioning

confidence: 99%

“…This study has demonstrated that the modified TiO 2 catalysts enhance the photocatalytic ability as to compare to TiO 2 . Some examples are clearly shown in the researches of others; degradation of organic compounds such as Eu-TiO 2 for Rhodamine B (RB) degradation [2], La-TiO 2 , Pr-TiO 2 , Nd-TiO 2 for reduction of hexavalent chromium and degradation of methylene blue [3] and La-TiO 2 and Ce-TiO 2 for degradation of methylene blue [4].…”

Section: Introductionmentioning

confidence: 99%

“…Several strategies have been reported by modifying the structure of TiO 2 to enhance its photoactivity under visible light and lower the recombination rate of photogenerated electron hole pairs. Among modifications made was doping rare earth element with the TiO 2 . This study has demonstrated that the modified TiO 2 catalysts enhance the photocatalytic ability as to compare to TiO 2 .…”

Section: Introductionmentioning

confidence: 99%

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CeO2-TiO2 FOR PHOTOREDUCTION OF CO2 TO METHANOL UNDER VISIBLE LIGHT: EFFECT OF CERIA LOADING

Abdullah

Ismail

Yaakob³

et al. 2017

MJAS

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A visible light-driven photocatalyst, CeO 2 -TiO 2 catalyst with different ceria loading was synthesized by impregnation method between TiO 2 powder and cerium oxide nanoparticles slurry. The prepared catalyst samples were characterized by X-ray diffraction (XRD), surface area analysis, UV-vis absorption spectroscopy and photoluminescence spectroscopy (PL). The band gap of CeO 2 -TiO 2 catalyst was found to be 2.15 -2.4 eV. The band gap reduction clearly indicated the successful loading of CeO 2 on TiO 2 . The photocatalytic activity was determined by measuring the photoreduction of CO 2 to methanol in aqueous solution under visible light. The effect of cerium loading in the range of 1 to 5 wt% on the photocatalytic activity was studied and 2 wt% CeO 2 -TiO 2 was found to exhibit the maximum photoactivity of 18.6 µmol/g.catalyst after 6 hours irradiation. Results showed that the prepared photocatalyst is visible light active and may be used as effective catalyst in photoreduction of CO 2 to methanol.Keywords: metal oxide, photocatalyst, band gap, nanoparticles Abstrak Fotomangkin yang boleh diaplikasi di bawah radiasi cahaya nampak iaitu mangkin CeO 2 -TiO 2 yang berbeza muatan ceria telah disintesis dengan kaedah impregnasi serbuk titanium dioksida dengan mendakan partikel nano cerium dioksida. Ciri mangkin yang dihasilkan dikaji dengan menggunakan pembelauan sinar-X (XRD), analisis luas permukaan, UV-Vis spektrofotometer dan spektroskopi fotoluminesen (PL). Jurang tenaga mangkin CeO 2 -TiO 2 adalah di antara 2.15 eV hingga 2.4 eV. Pengurangan jurang tenaga jelas menunjukkan pemuatan CeO 2 ke atas TiO 2 telah berjaya. Aktiviti fotopemangkinan ditentukan melalui tindak balas penurunan gas karbon dioksida (CO 2 ) di dalam larutan akueus kepada metanol dan dijalankan di bawah radiasi cahaya nampak. Kesan pemuatan 1 hingga 5 peratus berat cerium ke atas TiO 2 terhadap aktiviti fotopemangkinan telah dikaji dan CeO 2 -TiO 2 dengan 2 peratus berat cerium didapati menunjukkan fotosensitiviti maksimum iaitu penghasilan 18.6 µmol/g.mangkin selepas 6 jam radiasi. Hasil kajian menunjukkan bahawa fotomangkin yang dihasilkan adalah aktif di bawah cahaya nampak dan dijangka efektif untuk penurunan CO 2 kepada metanol.Kata kunci: logam oksida, fotomangkin, jurang tenaga, partikel nano

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“…The PL and decay times in nano-structured xerogel and annealed sol-gel silica glasses doped with RE ions, transition metal ions, metal complexes and semiconductor nano-crystals are investigated previously to study the excitation energy transfer processes, which reflect the optical properties of these confined nano-porous networks [18][19][20]. RE metal compounds, especially their oxides, have become of increasing interest in recent years because of their special PL and catalytic properties [21,22]. RE-based phosphors play a critical and indispensable role as luminescent materials in the display industry.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence studies on rare earth titanates prepared by self-propagating high temperature synthesis method

Joseph

Dayas

Damodar

et al. 2008

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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a b s t r a c tThe laser-induced luminescence studies of the rare earth titanates (R 2 Ti 2 O 7 ) (R = La, Nd and Gd) using 355 nm radiation from an Nd:YAG laser are presented. These samples with submicron or nanometer size are prepared by the self-propagating high temperature synthesis (SHS) method and there is no known fluorescence shown by these rare earths in the visible region. Hence, the luminescence transitions shown by the La 2 Ti 2 O 7 near 610 nm and Gd 2 Ti 2 O 7 near 767 nm are quite interesting. Though La 3+ ions with no 4f electrons have no electronic energy levels that can induce excitation and luminescence processes in the visible region, the presence of the Ti 3+ ions leads to luminescence in this region.

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Europium doped nanocrystalline titanium dioxide: preparation, phase transformation and photocatalytic properties

Cited by 113 publications

References 36 publications

Enhancement of photocatalytic activity of nano-scale TiO2 particles co-doped by rare earth elements and heteropolyacids

Enhancement of photocatalytic activity of nano-scale TiO2 particles co-doped by rare earth elements and heteropolyacids

CeO2-TiO2 FOR PHOTOREDUCTION OF CO2 TO METHANOL UNDER VISIBLE LIGHT: EFFECT OF CERIA LOADING

Photoluminescence studies on rare earth titanates prepared by self-propagating high temperature synthesis method

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