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Seedless Growth of Bismuth Nanowire Array via Vacuum Thermal Evaporation
Published on: December 21, 2015
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Probing structural variation and multifunctionality in niobium doped bismuth vanadate materials.
Sameera Saithathul Fathimah1, Padala Prabhakar Rao, Vineetha James
1Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India. padala_rao@yahoo.com.
Dalton Transactions (Cambridge, England : 2003)
|September 17, 2014
Summary
Niobium-doped bismuth vanadate (BiVO4) solid solutions were synthesized, showing excellent yellow pigment properties and near-infrared (NIR) reflectance for cool roofs. These multifunctional materials also degrade methylene blue dye under sunlight.
Area of Science:
- Materials Science
- Inorganic Chemistry
- Nanotechnology
Background:
- Multifunctional materials are crucial for advanced applications.
- Bismuth vanadate (BiVO4) is a promising material with tunable properties.
- Structural modifications can enhance material performance.
Purpose of the Study:
- To synthesize and characterize BiV1-xNbxO4 solid solutions.
- To investigate the effects of niobium doping on structural and optical properties.
- To evaluate the potential applications of these materials as pigments, for cool roofs, and in photocatalysis.
Main Methods:
- Citrate gel synthesis route followed by calcination.
- Powder X-ray diffraction (XRD) for structural analysis.
- Raman spectroscopy, SEM, TEM, and UV-Vis-NIR spectroscopy for property assessment.
Main Results:
- Successful synthesis of BiV1-xNbxO4 solid solutions with fine particles.
- Niobium doping induced structural variations influencing optical properties.
- Superior coloristic properties comparable to commercial yellow pigments.
- Remarkable NIR reflectance, indicating potential for cool roof applications.
- Effective degradation of methylene blue dye under sunlight irradiation.
Conclusions:
- BiV1-xNbxO4 solid solutions offer multifunctional properties.
- Niobium doping is an effective strategy to tune BiVO4 for various applications.
- These materials show promise for pigments, cool roofs, and environmental remediation.
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