Аннотация:
Hydrothermally grown ZnO nanowires (NWs) have been successfully synthesized and surface modified by an ultrathin layer of CuO using dip coating technique to achieve a highly sensitive H2S sensor. XRD analysis confirmed the hexagonal structure of ZnO without any Cu sub-oxide peaks. After CuO modification, the peak shift was observed in the electronic states of O and assigned to the defects and increase in adsorbed oxygen species. Similarly, a red shift was also observed in the band edge absorption after CuO modification arising due to defects. The sensor film showed an overall n-type character as confirmed using I(V) characteristics. Interestingly, sensor response kinetics towards H2S were enhanced after CuO modification. The highest sensor response value of 298 was measured towards 10 ppm H2S at 150∘C for CuO : ZnO NWs sample having 1.26 at.% of Cu. This improved sensor response has been attributed mainly to the formation of randomly distributed p–n nano-hetero-junctions between p-type CuO and n-type ZnO over the sensor surface. In particular, the p–n nano-hetero-junctions collapsed due to conversion of semiconducting CuO into metallic CuS after the unique interaction with H2S.
Образец цитирования:
C. P. Goyal, D. Goyal, N. S. Ramgir, M. Navaneethan, Y. Hayakawa, C. Muthamizhchelvan, H. Ikeda, S. Ponnusamy, “Surface modification of ZnO nanowires with CuO: a tool to realize highly-sensitive H2S sensor”, Физика твердого тела, 63:3 (2021), 375; Phys. Solid State, 63:3 (2021), 460–467
\RBibitem{GoyGoyRam21}
\by C.~P.~Goyal, D.~Goyal, N.~S.~Ramgir, M.~Navaneethan, Y.~Hayakawa, C.~Muthamizhchelvan, H.~Ikeda, S.~Ponnusamy
\paper Surface modification of ZnO nanowires with CuO: a tool to realize highly-sensitive H$_2$S sensor
\jour Физика твердого тела
\yr 2021
\vol 63
\issue 3
\pages 375
\mathnet{http://mi.mathnet.ru/ftt10155}
\transl
\jour Phys. Solid State
\yr 2021
\vol 63
\issue 3
\pages 460--467
\crossref{https://doi.org/10.1134/S1063783421030070}
Образцы ссылок на эту страницу:
https://www.mathnet.ru/rus/ftt10155
https://www.mathnet.ru/rus/ftt/v63/i3/p375
Эта публикация цитируется в следующих 6 статьяx:
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A. A. Ryabko, A. A. Bobkov, S. S. Nalimova, A. I. Maksimov, V. S. Levitskii, V. A. Moshnikov, E. I. Terukov, “Gas Sensitivity of Nanostructured Coatings Based on Zinc Oxide Nanorods under Combined Activation”, Tech. Phys., 68:S1 (2023), S13
D. Simon Patrick, A Govind, P Bharathi, M. Krishna Mohan, S Harish, J Archana, M. Navaneethan, “Hierarchical ZnO/g-C3N4 nanocomposites for enhanced NO2 gas sensing applications”, Applied Surface Science, 609 (2023), 155337
Arida Jabbari, Parisa Moradi, Maryam Hajjami, Bahman Tahmasbi, “Tetradentate copper complex supported on boehmite nanoparticles as an efficient and heterogeneous reusable nanocatalyst for the synthesis of diaryl ethers”, Sci Rep, 12:1 (2022)
Adelina Stanoiu, Andrei C. Kuncser, Daniela Ghica, Ovidiu G. Florea, Simona Somacescu, Cristian E. Simion, “Sensing Properties of NiO Loaded SnO2 Nanoparticles—Specific Selectivity to H2S”, Chemosensors, 9:6 (2021), 125
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