Straddled Band Aligned CuO/BaTiO3 Heterostructures: Role of Energetics at Nanointerface in Improving Photocatalytic and CO2 Sensing Performance
| Autor: | Shravanti Joshi, Samuel J. Ippolito, Suresh K. Bhargava, Ram Kumar Canjeevaram Balasubramanyam, Ahmad Esmaielzadeh Kandjani, Ylias M. Sabri, Manorama V. Sunkara |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Diffuse reflectance infrared fourier transform Heterojunction 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Band offset 0104 chemical sciences chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Photocatalysis Methyl orange Physical chemistry General Materials Science 0210 nano-technology Bifunctional Electronic band structure |
| Zdroj: | ACS Applied Nano Materials. 1:3375-3388 |
| ISSN: | 2574-0970 |
| Popis: | This work details novel insights on the role of energetics, that is, energy band bending and built-in potential at the nanointerface of CuO/BaTiO3 forming type I p/n heterostructures, evaluated by correlating X-ray photoelectron spectroscopy and ultraviolet diffuse reflectance spectroscopy studies. Cetyltrimethylammonium bromide (CTAB) assisted hydrothermal route was used to synthesize BaTiO3 cuboids with six active {100} facets, and its CuO based heterostructures were tested for bifunctional applications in environmental nanoremediation. Straddled CuO/BaTiO3 heterostructures reported herein showcased exceptional flexibility as a ultraviolet (UV) active photocatalyst for methyl orange (MO) degradation and chemo-resistive CO2 gas sensor. CuO/BaTiO3 heterostructures in equimole ratio could degrade 99% MO in 50 min with rate constant (κ) of a first-order reaction observed to be 10 and 100-fold greater in comparison with BaTiO3 and CuO samples, respectively. Subsequently, in a parallel application, trials wer... |
| Databáze: | OpenAIRE |
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