Photocatalytic property of nanostructured Fe3+-doped Bi2O3 films

“…12 It has been demonstrated that β-Bi 2 O 3 is a good material for heterogenous catalysis. [13][14][15][16] With the advent of nanotechnology, Bi 2 O 3 nanomaterials also find better use in a variety of applications including catalysts, electrical ceramics, solid-state electrolytes, gas sensors, superconductors, etc. [17][18][19][20][21][22][23][24] A primary reason for this improvement is due to the typically high surface area of nanomaterials, which provides for a large number of adsorption sites.…”

Section: Introductionmentioning

confidence: 99%

Dual function of rare earth doped nano Bi2O3: white light emission and photocatalytic properties

2012

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Undoped Bi(2)O(3) and single and double doped Bi(2)O(3) : M (where M = Tb(3+) and Eu(3+)) nanophosphors were synthesized through a simple sonochemical process and characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), EDS, diffuse reflectance (DRS) and photoluminescence (PL) spectrophotometry. The TEM micrographs show that resultant nanoparticles have a rod-like shape. Energy transfer was observed from host to the dopant ions. Characteristic green emissions from Tb(3+) ions and red emissions from Eu(3+) ions were observed. Interestingly, the Commission International de l'Eclairage (CIE) coordinates of the double doped Bi(2)O(3) : Eu(3+)(0.8%) : Tb(3+)(1.2%) nanorods lie in the white light region of the chromaticity diagram and it has a quantum efficiency of 51%. The undoped Bi(2)O(3) showed a band gap of 3.98 eV which is red shifted to 3.81eV in the case of double doped Bi(2)O(3) : Eu(3+)(0.8%) : Tb(3+)(1.2%) nanorods. The photocatalytic activities of undoped nano Bi(2)O(3) and double doped nano Bi(2)O(3) : Eu(3+)(0.8%) : Tb(3+)(1.2%) were evaluated for the degradation of Rhodamine B under UV irradiation of 310 nm. The results showed that Bi(2)O(3) : Eu(3+)(0.8%) : Tb(3+)(1.2%) had better photocatalytic activity compared to undoped nano Bi(2)O(3). The evolution of CO(2) was realized and these results indicated the continuous mineralization of rhodamine B during the photocatalytic process. Thus double doped Bi(2)O(3) : Eu(3+)(0.8%) : Tb(3+)(1.2%) nanorods can be termed as a bifunctional material exhibiting both photocatalytic properties and white light emission.

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Section: Introductionmentioning

confidence: 99%

“…Previously several strategies have been used to modify the texture and/or chemical composition of Bi 2 O 3 to optimize the electronic structure and conductivity to overcome the limitations, such as elemental doping, heterojunction construction, and plasma modification. − Reddy et al prepared Sm 3+ -doped Bi 2 O 3 via a hydrothermal approach, which impressively enhanced the catalytic activity for the narrowed band gap . Wu et al synthesized Fe 3+ -doped Bi 2 O 3 films by a sol–gel method, and increased photodegradation efficiency was improved because of the increased specific surface area and higher light utilization . Moreover, constructing Bi 2 O 3 -based heterojunctions such as BiOCl/Bi 2 O 3 , Bi 2 O 3 /TiO 2 , and Bi 2 O 3 /BaTiO 3 can also assist in the improvement of the photocatalytic performance of Bi 2 O 3 . − Nevertheless, the synthetic methods of elemental doping and heterojunction construction are sophisticated, and the compositions and properties of the derived materials are complicated.…”

Section: Introductionmentioning

confidence: 99%

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

Hao

Liu

Chen³

et al. 2019

ACS Appl. Nano Mater.

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Chlorophenols are corrosive and toxic in water environment, which have arisen increasing concerns and urge solar-driven technique with highly efficient photocatalysts for green remediation. Coupling photocatalysis with surface plasmon resonance (SPR) effect is a practical solution to boosting the utilization of solar light in the infrared region, meanwhile improving the overall performance of the photocatalysts. However, it is still lack of a facile and green strategy to synthesize metallic non-noble bismuth (Bi 0)-based photocatalysts. Herein, we report smart Bi/Bi2O3/C composites with high performance for photocatalytic degradation of 2,4-dichlorophenol. Advanced characterizations such as X-ray Diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) are applied to analyze the morphology and structure of the prepared materials. The photodegradation rate of the hybrid is significantly enhanced compared with the sole counterparts, which is 1.60-fold of Bi2O3 and 2.47-fold of g-C3N4. The synthesized Bi/C-2 exhibits excellent stability without decline in activity after four cycles. The SPR effect of Bi is identified to account for the strengthen photo-reactivity. Moreover, the relatively high utilization efficiency of solar energy and rapid separating rate of photogenerated electron and hole pairs helped to enhance the photocatalytic performance synergistically.

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Photocatalytic property of nanostructured Fe3+-doped Bi2O3 films

Cited by 42 publications

References 19 publications

Comparative study on photocatalytic performances of crystalline α- and β-Bi2O3 nanoparticles under visible light

Comparative study on photocatalytic performances of crystalline α- and β-Bi2O3 nanoparticles under visible light

Dual function of rare earth doped nano Bi2O3: white light emission and photocatalytic properties

Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

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Photocatalytic property of nanostructured Fe3+-doped Bi2O3 films

Cited by 42 publications

References 19 publications

Comparative study on photocatalytic performances of crystalline α- and β-Bi2O3 nanoparticles under visible light

Comparative study on photocatalytic performances of crystalline α- and β-Bi2O3 nanoparticles under visible light

Dual function of rare earth doped nano Bi2O3: white light emission and photocatalytic properties

Bi2O3@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols

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Bi₂O₃@Carbon Nanocomposites for Solar-Driven Photocatalytic Degradation of Chlorophenols