Template synthesis, structure, optical and catalytic properties derived from novel cadmium tungstates

Two simple templates, ethylenediamine (EDA) and ethylene diamine tetraacetic acid (EDTA), were used as precursors to synthesize CdWO4:Eu3+ with a regular shape based on a hydrothermal method. The derived materials were characterized by X-ray powder diffraction, scanning electronic microscopy and photoluminescence spectra. The images revealed that CdWO4:Eu3+ nanorods with diameters of 30–50 nm and lengths up to 200–300 nm were achieved with the assistance of EDTA. The photoluminescence studies indicated that the fluorescence intensity was significantly improved in the presence of this reagent. The red phosphors exhibited high photocatalytic activities for the degradation of different organic dyes (methyl orange, rhodamine B and methylene blue). The catalyst prepared with EDTA as a precursor gave the best results. The particle size, fluorescence, catalysis and CdWO4:Eu3+ with different microstructures have been discussed.

Graphical abstractTwo templates such as ethylenediamine (EDA) and ethylene diamine tetraacetic acid (EDTA) were used to synthesize CdWO4:Eu3+. The fluorescence intensity was significantly improved in the presence of EDTA.Figure optionsDownload full-size imageDownload as PowerPoint slide