Abstract
ZnO–x%Eu2O3 (x=5wt.%) binary oxide with straight strips morphology was successfully synthesized by hydrothermal route, using cetyltrimethylammonium bromide (CTAB) as template ZnSO4, Eu(NO3)3·5H2O as inorganic precursors and ammonium hydroxide solution 28% NH3 for adjusting the pH to 11 value. The morphology, structure, photoluminescence and surface chemistry were investigated. The results highlighted that ZnO–Eu2O3 binary oxide shows straight strip morphology and crystalline framework indexed to wurtzite ZnO while Eu2O3 was detected as secondary phase. Surface chemistry revealed the presence of Eu3+. High sensor signal to 3ppm NO2 together with its low sensitivity towards CO recommend this material as a good candidate in selective detection of NO2.
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