Preparation and characterization of novel Ln (Gd3+, Ho3+ and Yb3+)-doped Bi2MoO6 with Aurivillius layered structures and photocatalytic activities under visible light irradiation

Alemi, Abdolali; Kashfi, Ruhnaz; Shabani, Behrooz

doi:10.1016/j.molcata.2014.05.029

Cited by 71 publications

(28 citation statements)

References 40 publications

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“…Now, the rare earth (RE) doping is always deemed to enhance photocatalytic properties due to its rich 4 f electron configuration. For example, Ln 3+ (Ho 3+ and Yb 3+ )‐doped Bi 2 MoO 6 and Yb 3+ /Er +3 co‐doped Bi 2 WO 6 both showed improved photocatalytic activity compared with the bare materials . To the best of our knowledge, RE doped Bi 3.64 Mo 0.36 O 6.55 has not been studied before.…”

Section: Introductionsupporting

confidence: 90%

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm³⁺/Yb³⁺ Co–Doped Bi_3.64Mo_0.36O_6.55

et al. 2019

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A novel photocatalyst of Bi3.64Mo0.36O6.55 doped with Tm3+/Yb3+ was prepared by a simple coprecipitation method followed by a calcination technology. The as‐synthesized Tm3+/Yb3+‐Bi3.64Mo0.36O6.55 samples were characterized by various analytical methods. The as‐synthesized sample exhibited enhanced photocatalytic activity when degrading Rhodamine B under the irradiation of visible‐light. The photocatalytic degradation efficiency of Tm3+/Yb3+‐Bi3.64Mo0.36O6.55 (95.2%) was higher than that of pure Bi3.64Mo0.36O6.55 (85.2%) in 50 min. Besides, the sample revealed a stable photocatalytic property after four photodegradation cycles. Therefore, this study may provide a better method to obtain stable upconversion photocatalyst degrading organic pollution with greatly improved activity.

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Section: Introductionsupporting

confidence: 90%

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm³⁺/Yb³⁺ Co–Doped Bi_3.64Mo_0.36O_6.55

et al. 2019

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“…Therefore, it is necessary to modify Bi 2 MoO 6 to enhance its photocatalytic performance. Up to now, there are numerous methods to improve photocatalytic activity of Bi 2 MoO 6 , such as doping other semiconductor materials, doping Ln (like Gd 3+ , Ho 3+ and Yb 3+ ) ions, forming heterojunction and compositing with quantum dots …”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorption and Photocatalytic Degradation of Dyes by AgI‐Bi₂MoO₆/Vermiculite Composite under Visible Light

et al. 2019

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A novel efficient AgI‐Bi2MoO6/vermiculite adsorption‐photocatalyst is successfully synthesized by sol‐gel method and precipitation method. The structure and properties of AgI‐Bi2MoO6/vermiculite were analyzed by XRD, FT‐IR, XPS, SEM, TEM, BET, and DRS. All the AgI‐Bi2MoO6/vermiculite composites with different AgI content show enhanced photocatalytic performance for malachite green (MG) dye degradation compared to pure Bi2MoO6 and Bi2MoO6/vermiculite composites. The highest degradation efficiency for MG (30 mg/L) via 5 wt%‐AgI‐Bi2MoO6/vermiculite composite (AgI content 5 wt%) photocatalyst (1 g/L) reaches 98.89% in 60 min at pH 9 without salt. The enhanced performance can be attributed to the uniform dispersion of Bi2MoO6 and AgI on the surface of vermiculite, the stable structure, the enhanced adsorption and the widened visible‐light absorption range as well as the faster separation of electron‐hole pairs. Besides, the photocatalyst still shows relatively high adsorption and photocatalytic performance after three times recycling. In addition, the possible photocatalytic mechanism is proposed at the end.

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“…Photocatalytic degradation of the pollutants in wastewater entailed a chain of advantages including conserving energy and little secondary pollution; it had therefore gradually attracted more and more attention in textile wastewater treatment. Metal oxides [13,14,15,16,17,18,19,20,21,22,23,24] and metal sulfides [21,22,23,24,25,26,27,28,29,30,31,32,33] were the most common semiconductor photocatalysts. Among metal oxides, anatase TiO 2 was investigated most repeatedly owing to its non-toxic property, excellent stability and low cost.…”

Section: Introductionmentioning

confidence: 99%

The Structural, Photocatalytic Property Characterization and Enhanced Photocatalytic Activities of Novel Photocatalysts Bi2GaSbO7 and Bi2InSbO7 during Visible Light Irradiation

Luan

Shen

et al. 2016

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In order to develop original and efficient visible light response photocatalysts for degrading organic pollutants in wastewater, new photocatalysts Bi2GaSbO7 and Bi2InSbO7 were firstly synthesized by a solid-state reaction method and their chemical, physical and structural properties were characterized. Bi2GaSbO7 and Bi2InSbO7 were crystallized with a pyrochlore-type structure and the lattice parameter of Bi2GaSbO7 or Bi2InSbO7 was 10.356497 Å or 10.666031 Å. The band gap of Bi2GaSbO7 or Bi2InSbO7 was estimated to be 2.59 eV or 2.54 eV. Compared with nitrogen doped TiO2, Bi2GaSbO7 and Bi2InSbO7, both showed excellent photocatalytic activities for degrading methylene blue during visible light irradiation due to their narrower band gaps and higher crystallization perfection. Bi2GaSbO7 showed higher catalytic activity compared with Bi2InSbO7. The photocatalytic degradation of methylene blue followed by the first-order reaction kinetics and the first-order rate constant was 0.01470 min−1, 0.00967 min−1 or 0.00259 min−1 with Bi2GaSbO7, Bi2InSbO7 or nitrogen doped TiO2 as a catalyst. The evolution of CO2 and the removal of total organic carbon were successfully measured and these results indicated continuous mineralization of methylene blue during the photocatalytic process. The possible degradation scheme and pathway of methylene blue was also analyzed. Bi2GaSbO7 and Bi2InSbO7 photocatalysts both had great potential to purify textile industry wastewater.

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Preparation and characterization of novel Ln (Gd3+, Ho3+ and Yb3+)-doped Bi2MoO6 with Aurivillius layered structures and photocatalytic activities under visible light irradiation

Cited by 71 publications

References 40 publications

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm³⁺/Yb³⁺ Co–Doped Bi_3.64Mo_0.36O_6.55

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm³⁺/Yb³⁺ Co–Doped Bi_3.64Mo_0.36O_6.55

Efficient Adsorption and Photocatalytic Degradation of Dyes by AgI‐Bi₂MoO₆/Vermiculite Composite under Visible Light

The Structural, Photocatalytic Property Characterization and Enhanced Photocatalytic Activities of Novel Photocatalysts Bi2GaSbO7 and Bi2InSbO7 during Visible Light Irradiation

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Preparation and characterization of novel Ln (Gd3+, Ho3+ and Yb3+)-doped Bi2MoO6 with Aurivillius layered structures and photocatalytic activities under visible light irradiation

Cited by 71 publications

References 40 publications

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm3+/Yb3+ Co–Doped Bi3.64Mo0.36O6.55

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm3+/Yb3+ Co–Doped Bi3.64Mo0.36O6.55

Efficient Adsorption and Photocatalytic Degradation of Dyes by AgI‐Bi2MoO6/Vermiculite Composite under Visible Light

The Structural, Photocatalytic Property Characterization and Enhanced Photocatalytic Activities of Novel Photocatalysts Bi2GaSbO7 and Bi2InSbO7 during Visible Light Irradiation

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Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm³⁺/Yb³⁺ Co–Doped Bi_3.64Mo_0.36O_6.55

Synthesis and Enhanced Visible‐Light Photocatalytic Activity of Tm³⁺/Yb³⁺ Co–Doped Bi_3.64Mo_0.36O_6.55

Efficient Adsorption and Photocatalytic Degradation of Dyes by AgI‐Bi₂MoO₆/Vermiculite Composite under Visible Light