access icon free Hierarchical BiVO4 micro/nanostructures synthesised via a solvothermal route and photodegradation of Rhodamine B

Various bismuth vanadate (BiVO4) hierarchical micro/nanostructures with cocoon-like, flower-like and branch-like morphologies were successfully synthesised by a facile template-free solvothermal approach. The as-synthesised products were characterised by X-ray diffraction, transmission electron microscopy (TEM), high-resolution TEM, scanning electron microscopy, nitrogen adsorption–desorption and UV–vis absorption spectroscopy. The experimental results indicate that the volume ratio of ethylene glycol to water has a remarkable influence on the morphologies and microstructures of the obtained products. An oriented aggregation process is presented to account for the formation of the hierarchical BiVO4 micro/nanostructures in the current synthetic condition. In addition, the photocatalytic activity of the obtained BiVO4 products under visible-light irradiation was initially evaluated by degradation of Rhodamine B.

Inspec keywords: aggregation; adsorption; X-ray diffraction; ultraviolet spectra; catalysis; scanning electron microscopy; bismuth compounds; semiconductor growth; nanofabrication; photochemistry; nitrogen; ternary semiconductors; nanostructured materials; transmission electron microscopy; crystal microstructure; desorption; visible spectra

Other keywords: photocatalytic activity; template-free solvothermal approach; bismuth vanadate hierarchical nanostructures; BiVO4; nitrogen adsorption-desorption; N2; cocoon-like morphology; UV-vis absorption spectroscopy; aggregation; transmission electron microscopy; high-resolution TEM; flower-like morphology; bismuth vanadate hierarchical microstructures; ethylene glycol; branch-like morphology; visible-light irradiation; Rhodamine B photodegradation; X-ray diffraction; scanning electron microscopy

Subjects: Adsorption and desorption kinetics; evaporation and condensation; Photolysis and photodissociation by IR, UV and visible radiation; Visible and ultraviolet spectra of other nonmetals; Sorption and accommodation coefficients (surface chemistry); Heterogeneous catalysis at surfaces and other surface reactions; Nanometre-scale semiconductor fabrication technology; Microstructure; Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; Methods of nanofabrication and processing; Optical properties of other inorganic semiconductors and insulators (thin films, low-dimensional and nanoscale structures); Oxide and ferrite semiconductors

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2014.0128
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