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TitleMechanochemically synthesized m-BiVO4 nanoparticles for visible light photocatalysis
AuthorQ. Luo,a b L. Zhang, a X. Chen, a O. K. Tan a and K. C. Leong b
Affiliation(s)Nanomaterials Lab, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore E-mail: zh0012li@e.ntu.edu.sg, EOKTAN@ntu.edu.sg b GLOBALFOUNDRIES Singapore Pte Ltd, Singapore
PublishedRSC Adv., 2016,6, 15796-15802 DOI: 10.1039/C5RA28128H
Keywordwhite LED,
Snippet. ... The light source used was a white LED (λ > 420 nm, Prizmatix optical devices) having an output powder density of 50 mW cm −2 , as calibrated and measured by broadband energy/power meter (Melles Griot). ...
AbstractIn this work, a mechanochemical high energy ball milling approach was used to synthesize monoclinic BiVO4 (m-BiVO4) nanoparticles in an attempt to simultaneously reduce the particle size and improve the throughput for practical photocatalytic applications. The effect of annealing to eliminate the induced defects and thus enhance the reactivity was studied on the mechanochemically synthesized BiVO4 nanoparticles. Besides using the conventional characterization tools of XRD, Raman, FE-SEM, HRTEM, XPS and UV-vis diffuse reflectance to examine the crystalline structure, morphology, chemical states and visible light absorption, a customized Kelvin probe coupled with an LED light source was developed as a non-contact tool to study the surface photovoltage (SPV) response for understanding charge generation and separation. The photocatalytic performance was finally evaluated for the degradation of Rhodamine B (RhB) under visible light irradiation to correlate with these physicochemical properties.

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