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Facile synthesis of nanostructured CuO for low temperature NO2 sensing

Das, A. ; Venkataramana, Bonu ; Partheephan, D. ; Prasad, A.K. ; Dhara, S. ; Tyagi, A.K.

Physica. E, Low-dimensional systems & nanostructures, 2013-12, Vol.54, p.40-44 [Periódico revisado por pares]

Amsterdam: Elsevier B.V

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Título:
Facile synthesis of nanostructured CuO for low temperature NO2 sensing
Autor: Das, A. ; Venkataramana, Bonu ; Partheephan, D. ; Prasad, A.K. ; Dhara, S. ; Tyagi, A.K.
Assuntos: Adsorption kinetics ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Condensed matter: structure, mechanical and thermal properties ; Cross-disciplinary physics: materials science; rheology ; Electron and ion emission by liquids and solids; impact phenomena ; Exact sciences and technology ; Field emission, ionization, evaporation, and desorption ; General equipment and techniques ; Instruments, apparatus, components and techniques common to several branches of physics and astronomy ; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties ; Materials science ; Methods of nanofabrication ; Nanostructured copper oxide ; Nitrogen dioxide ; Physics ; Sensor ; Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing ; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
É parte de: Physica. E, Low-dimensional systems & nanostructures, 2013-12, Vol.54, p.40-44
Descrição: Detection of environmental pollutant and health hazardous, nitrogen dioxide (NO2) is reported using nanostructured CuO particulates (NPs). Powder X-ray diffraction and field emission scanning electron microscopy were used to probe crystalline phase and morphological details, respectively. Small crystallites of ∼10–12nm and a strain of 4% were found in the leafy structure of CuO. Raman studies further supported the presence of nanosized CuO phase. This is the first instance of utilizing CuO NPs to detect 5ppm of NO2 even at a low operating temperature of 50°C. The highest sensitivity for NO2 was observed at 150°C, for the first time, in CuO NPs. A low activation energy of 0.18eV was found for sensing process. The CuO NPs sensor responded to NO2 within a few seconds and recovered totally under a minute. The kinetics of the NO2 gas adsorption on the CuO film surface was described following the Elovich model. Nanostructured p-type CuO exhibited a quick sensing reaction (TR) as well recovery (TREC) of NO2 toxic gas at low temperature of 50°C. [Display omitted] •Single step synthesis of nanosized crystallites CuO.•Sensing low concentration of toxic NO2 gas at only 50°C without any interference from oxygen.•Temperature dependence sensing offered low activation energy of 0.18eV.•Adsorption kinetics is detailed based on the Elovich model.
Editor: Amsterdam: Elsevier B.V
Idioma: Inglês

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Facile synthesis of nanostructured CuO for low temperature NO2 sensing

Das, A. ; Venkataramana, Bonu ; Partheephan, D. ; Prasad, A.K. ; Dhara, S. ; Tyagi, A.K.

Amsterdam: Elsevier B.V

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