TY - JOUR
T1 - Role of Cu in the enhancement of NH3 sensing performance of spray pyrolyzed WO3 nanostructures
AU - Anusha,
AU - Antony, Albin
AU - Ani, Aninamol
AU - Poornesh, P.
AU - Kulkarni, Suresh D.
N1 - Funding Information:
Poornesh P acknowledges Manipal Academy of Higher Education, Manipal for funding the research project through Intramural Funding (Grant no.: MAHE/DREG/PhD/IMF/2019 ). Anusha acknowledges the Indian Nano electronics User Program (INUP), supported by the Ministry of Human Resource Development (MHRD), Govt. of India , located at the Indian Institute of Science, Bengaluru for providing the facilities to carry out a part of the work.
Funding Information:
Poornesh P acknowledges Manipal Academy of Higher Education, Manipal for funding the research project through Intramural Funding (Grant no.: MAHE/DREG/PhD/IMF/2019). Anusha acknowledges the Indian Nano electronics User Program (INUP), supported by the Ministry of Human Resource Development (MHRD), Govt. of India, located at the Indian Institute of Science, Bengaluru for providing the facilities to carry out a part of the work.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/10
Y1 - 2021/10
N2 - Cu doped WO3 (Cu: WO3) films synthesized by chemical spray pyrolysis were explored for Ammonia (NH3) gas sensing. Obtained films were examined by X-ray diffraction technique (XRD), Scanning Electron Microscopy (SEM), UV–Visible spectroscopy (UV), Photoluminescence (PL), Raman and X-ray Photoelectron spectroscopy (XPS). XRD and Raman studies reveals the existence of monoclinic-I (γ-WO3) phase. Lower angle shift of (200) peak was noted in XRD for 3% Cu: WO3 primarily due to tensile strain developed in the WO3 lattice caused by Cu incorporation. SEM morphographs exhibited well defined grains on amalgamation of Cu in WO3 matrix. Photoluminescence studies showed enhancement in the oxygen vacancies upon Cu doping which plays crucial role in improving the sensor response. Gas sensing measurements of the films were performed at an operating temperature of 250 °C towards 1, 3 and 5 ppm concentration of NH3 gas. Incorporation of Cu into WO3 enhanced sensor response and shortened response time comapred to pristine WO3 films. 3% Cu doped WO3 showed good sensor response of 1.58 for 5 ppm concentration of NH3.
AB - Cu doped WO3 (Cu: WO3) films synthesized by chemical spray pyrolysis were explored for Ammonia (NH3) gas sensing. Obtained films were examined by X-ray diffraction technique (XRD), Scanning Electron Microscopy (SEM), UV–Visible spectroscopy (UV), Photoluminescence (PL), Raman and X-ray Photoelectron spectroscopy (XPS). XRD and Raman studies reveals the existence of monoclinic-I (γ-WO3) phase. Lower angle shift of (200) peak was noted in XRD for 3% Cu: WO3 primarily due to tensile strain developed in the WO3 lattice caused by Cu incorporation. SEM morphographs exhibited well defined grains on amalgamation of Cu in WO3 matrix. Photoluminescence studies showed enhancement in the oxygen vacancies upon Cu doping which plays crucial role in improving the sensor response. Gas sensing measurements of the films were performed at an operating temperature of 250 °C towards 1, 3 and 5 ppm concentration of NH3 gas. Incorporation of Cu into WO3 enhanced sensor response and shortened response time comapred to pristine WO3 films. 3% Cu doped WO3 showed good sensor response of 1.58 for 5 ppm concentration of NH3.
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U2 - 10.1016/j.mssp.2021.105967
DO - 10.1016/j.mssp.2021.105967
M3 - Article
AN - SCOPUS:85107694252
SN - 1369-8001
VL - 133
JO - Materials Science in Semiconductor Processing
JF - Materials Science in Semiconductor Processing
M1 - 105967
ER -