Lanthanum and boron co-doped BiVO4 with enhanced visible light photocatalytic activity for degradation of methyl orange

Wang, Min; Che, Yinsheng; Niu, Chao; Dang, Mingyan; Dong, Duo

doi:10.1016/s1002-0721(12)60373-1

Cited by 44 publications

(12 citation statements)

References 29 publications

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“…In this work, we prepared pure and La‐doped ZnO for photocatalytic and electrocatalytic degradation of Rhodamine B (RhB) in aqueous medium. Doping Zn with La is expected to give an enhancement of the photocatalytic, photoabsorption performance and the electronic conductivity because of the f‐orbitals of the lanthanide ions can form complexes with various Lewis bases so on so forth, it may also change the Fermi level and incorporate intermediate levels, and this might reduce the band gap. Opoku et al .…”

Section: Introductionmentioning

confidence: 99%

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Ahsaine

Slassi

Naciri³

et al. 2018

ChemistrySelect

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This work reports the synthesis of nanocrystalline ZnO and 5% La‐doped ZnO (La/ZnO) materials for photo/electrocatalytic degradation of Rhodamine B. The samples were characterized by X‐Ray diffraction, scanning and transmission electron microscopy, X‐Ray photoelectron spectroscopy and diffuse reflectance spectra. The effect of La doping on electronic structure was investigated using density functional theory calculations (DFT), La‐doped ZnO showed an n‐type metallic nature compared to pristine ZnO and La doping creates occupied states within the band gap edge. Under UV light, La/ZnO showed higher kinetic constant and efficiency than ZnO. A possible mechanism was elaborated on the basis of DFT and active trapping measurements. Different initial Rhodamine B concentration were studied to assess the electro‐oxidation of RhB. The electrochemical degradation of RhB over La/ZnO spindles electrode was pronounced with three time's high kinetic constant. The superior electro/photoactivity of La/ZnO was due to its unique morphology, high charge separation of the charge carriers and higher conductivity induced by La‐doping (intermediary levels). Superoxide ions and holes were the main active species for the photodegradation. Whereas, synergetic effect of hydroxyl radicals and hypochlorite ions were responsible of the high RhB electrocatalytic degradation.

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Section: Introductionmentioning

confidence: 99%

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Ahsaine

Slassi

Naciri³

et al. 2018

ChemistrySelect

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“…In the La 3d spectrum (Fig. 3d) of the corresponding doping films, the presence of a peak at a binding energy of 834.3 eV, which corresponds to the La 3d5/2 signal, indicates the existence of La 3+ species in the studied samples [66]. The Ce 3d XPS spectrum (Fig.…”

Section: Preparation Of Dopedmentioning

confidence: 92%

Improving the photoactivity of bismuth vanadate thin film photoanodes through doping and surface modification strategies

Quiñonero

Lana–Villarreal

Gómez

2016

Applied Catalysis B: Environmental

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2 Graphical abstract HIGHLIGHTS La and Ce doping greatly improves the photoresponse of BiVO4 photoanodes for PEC water oxidation.  Ce and La doping triggers a significantly shift of the flat band potential to more negative values.  Surface modification of the pristine and doped BiVO4 photoanodes with Au nanoparticles further enhances the photocurrent.  Gold nanoparticles act solely as co-catalytic centers without a contribution from visible sensitization. ABSTRACTCurrently, one of the most attractive and desirable ways to solve the energy challenge is harvesting energy directly from the sunlight through the so-called artificial photosynthesis. Among the ternary oxides based on earth-abundant metals, bismuth vanadate has recently emerged as a promising photoanode. Herein, BiVO4 thin film photoanodes have been successfully synthesized by a modified metal-organic precursor decomposition method, followed by an annealing treatment. In an attempt to improve the photocatalytic properties of this semiconductor material for photoelectrochemical water oxidation, the electrodes have been modified (i) by doping with La and Ce (by modifying the composition of the BiVO4 precursor solution with the desired concentration of the doping element), and (ii) by surface modification with Au nanoparticles potentiostatically electrodeposited. La and Ce doping at concentrations of 1 and 2 at% in the BiVO4 precursor solution, respectively, enhance significantly the photoelectrocatalytic performance of BiVO4 without introducing important changes in either the material structure or the electrode morphology, according to XRD and SEM characterization. In addition, surface modification of the electrodes with Au nanoparticles further enhances the photocurrent as such metallic nanoparticles act as co-catalysts, promoting charge transfer at the semiconductor/solution interface. The combination of these two complementary ways of modifying the electrodes has resulted in a significant increase in the photoresponse, facilitating their potential application in artificial photosynthesis devices.

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“…9b. Here, it is assumed that the degradation of MB is a first-order reaction, and its rate equation can be expressed as: 14 ln…”

Section: Nitrogen Adsorption Specific Surface Areamentioning

confidence: 99%

Structure, morphology and photocatalytic performance of europium and fluorine co-doped bismuth vanadate

et al. 2022

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Lanthanum and boron co-doped BiVO4 with enhanced visible light photocatalytic activity for degradation of methyl orange

Cited by 44 publications

References 29 publications

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Photo/Electrocatalytic Properties of Nanocrystalline ZnO and La–Doped ZnO: Combined DFT Fundamental Semiconducting Properties and Experimental Study

Improving the photoactivity of bismuth vanadate thin film photoanodes through doping and surface modification strategies

Structure, morphology and photocatalytic performance of europium and fluorine co-doped bismuth vanadate

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