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Preparation and characterization of Ag2CrO4/few layer boron nitride hybrids for visible-light-driven photocatalysis
- Source :
- Journal of Nanoparticle Research. 19
- Publication Year :
- 2017
- Publisher :
- Springer Science and Business Media LLC, 2017.
-
Abstract
- Nanosized Ag2CrO4/few layer boron nitride composites were prepared via in situ precipitation method. The crystal structure, morphology, optical properties, and charge carrier behavior were investigated by X-ray diffraction, transmission electrical microscopy, UV-vis diffuse reflectance spectroscopy, and electrochemical impedance spectroscopy, respectively. The photocatalytic activities of the as-prepared hybrids were discussed by degradation of rhodamine B under visible-light irradiation. Experimental results showed that the average size of pure Ag2CrO4 particles was about 20 nm. Moreover, the degradation efficiency of the as-prepared hybrids was first increased and then decreased with increasing the usage amount of few layer boron nitride nanosheets. When it was 10 wt%, in 120 min, the degradation efficiency of the as-prepared hybrids had reached the maximum of 96.7%. It was much higher than 75% of pure Ag2CrO4 nanoparticles. After 3 cycles of the degradation, the efficiency of the as-prepared composites was decreased from 96.7 to 91.8%. Trapping experiment results revealed that holes played a major role during the photocatalysis process. In addition, electrochemical impedance spectroscopy results indicated that few layer boron nitride nanosheets could enhance the separation and transfer of photogenerated electrons and holes.
- Subjects :
- Materials science
Diffuse reflectance infrared fourier transform
Inorganic chemistry
Nanoparticle
Bioengineering
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
0104 chemical sciences
Dielectric spectroscopy
chemistry.chemical_compound
chemistry
Chemical engineering
Boron nitride
Modeling and Simulation
Photocatalysis
Rhodamine B
General Materials Science
Charge carrier
0210 nano-technology
Visible spectrum
Subjects
Details
- ISSN :
- 1572896X and 13880764
- Volume :
- 19
- Database :
- OpenAIRE
- Journal :
- Journal of Nanoparticle Research
- Accession number :
- edsair.doi...........950a8dbd80588554fd214ff63b4f4e97