TY - JOUR
T1 - EDTA mediated microwave hydrothermal synthesis of WO3 hierarchical structure and its photoactivity under simulated solar light
AU - Adhikari, Rajesh
AU - Gyawali, Gobinda
AU - Kim, Tae Ho
AU - Sekino, Tohru
AU - Lee, Soo Wohn
N1 - Funding Information:
This research work has been supported by Global Research Program of the National Research Foundation of Korea (NRF) funded by Ministry of Education, Science and Technology (MEST), Korea (grant number: 2010-00339 ).
PY - 2014/9
Y1 - 2014/9
N2 - In this paper, we report a facile microwave hydrothermal synthesis of WO3 hierarchical structure in presence of disodium salt of ethylenediaminetetraacetic acid (EDTA) as a complexing agent and its photoactivity for the degradation of rhodamine B (Rh B) under simulated solar light irradiation. The synthesized WO3 samples were structurally, morphologically and optically characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and Brunauer-Emmett-Teller (BET) surface area analysis. The result revealed that the addition of EDTA leads to the controlled aggregation of WO3 nanoparticles having high crystallinity with monoclinic structure and creates oxygen vacancy in the WO3 lattice. Moreover, at high concentration of EDTA, cauliflower like hierarchical structure was formed when the optimum concentration of EDTA reaches to 0.5 mol% at pH 6 and exhibited best photoactivity for the Rh B degradation. These results indicate that the WO3 hierarchical structures with oxygen vacancies are potential materials for effective mineralization of Rh B, one of the hazardous pollutants.
AB - In this paper, we report a facile microwave hydrothermal synthesis of WO3 hierarchical structure in presence of disodium salt of ethylenediaminetetraacetic acid (EDTA) as a complexing agent and its photoactivity for the degradation of rhodamine B (Rh B) under simulated solar light irradiation. The synthesized WO3 samples were structurally, morphologically and optically characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectroscopy (UV-vis DRS) and Brunauer-Emmett-Teller (BET) surface area analysis. The result revealed that the addition of EDTA leads to the controlled aggregation of WO3 nanoparticles having high crystallinity with monoclinic structure and creates oxygen vacancy in the WO3 lattice. Moreover, at high concentration of EDTA, cauliflower like hierarchical structure was formed when the optimum concentration of EDTA reaches to 0.5 mol% at pH 6 and exhibited best photoactivity for the Rh B degradation. These results indicate that the WO3 hierarchical structures with oxygen vacancies are potential materials for effective mineralization of Rh B, one of the hazardous pollutants.
KW - Complexing agent
KW - EDTA
KW - Hierarchical
KW - Rhodamine B
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U2 - 10.1016/j.jece.2014.02.019
DO - 10.1016/j.jece.2014.02.019
M3 - Article
AN - SCOPUS:84904186623
VL - 2
SP - 1365
EP - 1370
JO - Journal of Environmental Chemical Engineering
JF - Journal of Environmental Chemical Engineering
SN - 2213-3437
IS - 3
ER -