Utilization of Novel (KNbO 3 ) 1− x (Ba 2 FeNbO 6 ) x ( x = 0.1, 0.2, 0.3) Solid Solutions for Efficient Photo‐Assisted Fenton Degradation of Methylene Blue Dye
[1];
[2];
[3];
[2];
[2];
[2]
- Technische Universität Berlin, Faculty III Process Sciences Institute of Materials Science and Technology Chair of Advanced Ceramic Materials Straße des 17. Juni 135 10623 Berlin Germany, Scientific Research Projects Coordinatorship Usak University 64000 Usak Turkey
- Technische Universität Berlin, Faculty III Process Sciences Institute of Materials Science and Technology Chair of Advanced Ceramic Materials Straße des 17. Juni 135 10623 Berlin Germany
- Faculty of Chemistry and Metallurgy Department of Metallurgical and Materials Engineering Yıldız Technical University 34210 Istanbul Turkey
Novel (KNbO 3 ) 1− x (Ba 2 FeNbO 6 ) x ( x = 0.1, 0.2, 0.3) solid solutions corresponding to K 0.82 Ba 0.18 Fe 0.09 Nb 0.91 O 3 , K 0.64 Ba 0.36 Fe 0.18 Nb 0.82 O 3 , and K 0.46 Ba 0.54 Fe 0.27 Nb 0.73 O 3 compounds have been synthesized via molten salt method. X‐ray diffraction confirms the formation of solid solutions, while transmission electron microscopy combined with energy‐dispersive spectroscopy results demonstrates a homogeneous distribution of elements. The obtained solid solutions crystallized in a cubic crystal structure, whereas the parent KNbO 3 possesses an orthorhombic structure. The wide bandgap semiconductor KNbO 3 transformed into a visible‐light‐active material, with its bandgap energy reduced from 3.56 eV to ≈2.4 eV. The substitution of K in KNbO 3 with Ba is responsible for structural modification from orthorhombic to cubic symmetry, whereas both structural modification and the substitution of Nb with Fe correlated with optical properties. The photocatalytic activities of all obtained solid solutions are improved compared with the parent KNbO 3 and Ba 2 FeNbO 6 compounds for photocatalytic degradation of methylene blue (MB) dye. Among the series of solid solutions, K 0.82 Ba 0.18 Fe 0.09 Nb 0.91 O 3 photocatalysts show the highest MB removal efficiency owing to its relatively higher surface area, suppressed charge carrier recombination, and more negative conduction band edge. Moreover, K 0.82 Ba 0.18 Fe 0.09 Nb 0.91 O 3 photocatalyst (0.1 g) combined with hydrogen peroxide (H 2 O 2 ) to form a novel photo‐Fenton system, achieving almost complete degradation of 100 mL of 10 mg L −1 MB dye in 30 min.
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 2480583
- Journal Information:
- Advanced Energy and Sustainability Research, Journal Name: Advanced Energy and Sustainability Research Journal Issue: 1 Vol. 6; ISSN 2699-9412
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- Germany
- Language:
- English
Similar Records
Composition dependence of the photophysical and photocatalytic properties of (AgNbO{sub 3}){sub 1-x}(NaNbO{sub 3}){sub x} solid solutions
Direct formation of new, phase-stable, and photoactive anatase-type Ti{sub 1-2X}Nb{sub X}Sc{sub X}O{sub 2} solid solution nanoparticles by hydrothermal method