Pure orthorhombic phase Bi2WO6 powders were synthesized by a microwave hydrothermal method in the absence of surfactants and templates, using Bi(NO3)3·5H2O and Na2WO4·2H2O as raw materials. Photocatalytic properties of the samples prepared at different reaction temperatures were also studied with Rhodamine B (RhB) solution as the target catabolite under visible light. The results indicate that flower-like Bi2WO6 powders can be obtained by controlling the microwave reaction temperatures in the absence of any additives. The growth of flower-like Bi2WO6 powders is a multistage layer assembly process, in which the flower-like Bi2WO6 self-assembling with the uniform size about 2 μm is synthesized at 180 °C. At the same time, the photocatalytic reaction rate constant (k) gets up to 0.04167/min and the degradation rate of RhB solution is more than 96 % after being irradiated under visible light for 70 min.
Research on Chemical Intermediates – Springer Journals
Published: Jan 16, 2013
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