Synthesis and enhanced gas sensing properties of crystalline CeO2/TiO2 core/shell nanorods

Enhanced Ethanol Gas Sensing Properties of SnO2-Core/ZnO-Shell Nanostructures

“…On the other hand, if the thickness of the shell is larger than 45 nm, the core/shell nanostructures have weak sensing characteristics [32]. In our previous work [41], we reported that the thickness of the ZnO shell increased to ∼50 nm when the core/shell nanostructures were grown for a longer time of 120 min.…”

Synthesis of TiO2–ZnS nanocomposites via sacrificial template sulfidation and their ethanol gas-sensing performance

“…lists a comparison of the ethanol vapor sensing responses of TiO 2 -ZnS-3 and other reported TiO 2 -based heterostructures [22][23][24][25]. Most TiO 2 -based composites demonstrate adequate gas-sensing response to ethanol vapor only at high operating temperatures of 270-400 C. TiO 2 -ZnS-3 exhibited superior ethanol vapor sensing response compared with other competing heterostructures, and proved the high potential of TiO 2 -ZnS composite nanorods for application to ethanol vapor detection.ConclusionsZnO shell layers with different thicknesses were used as a sacri-cial layer to form TiO 2 -ZnS core-shell nanorods by using TAA as a sulfurizing reagent in a hydrothermal reaction.…”

Recent Progress in Hydrothermal Synthesis of Zinc Oxide Nanomaterials

“…A variety of materials and nanostructured morphologies can be obtained by hydrothermal method, such as hollow nanospheres of NiO, -Fe 2 O 3 , ZnO, Ga 2 O 3 , and CuO [20], SnO 2 [30,36,37,40,47,48], F:SnO 2 [44], SnO [45], Fe 2 O 3 [46], indium tin oxide (ITO) [43], Ti x 1 Sn x O 2 [42], Y 2 O 3 , Na 2 SiO 3 , and Li 2 Si 2 O 5 [41], carbon-coated SnO 2 [39], TiO 2 /SrTiO 3 [38], titanate and TiO 2 [24-28, 31-33, 35], In 2 O 3 [34], CeO 2 [23,29], MgO [21], CeO 2 /TiO 2 [22] etc. For some of these materials, such as TiO 2 , SnO 2 , CeO 2 , and In 2 O 3 , doping and ternary alloys [29,35,42,44] have been demonstrated.…”

“…For some of these materials, such as TiO 2 , SnO 2 , CeO 2 , and In 2 O 3 , doping and ternary alloys [29,35,42,44] have been demonstrated. Practical applications, such as lithium storage [36,37,39,41,45,47,48], sensors [22,34,40,46], catalysts [23] and photocatalysts [24,26,27,31,32,35,38,42], solar cells [33], phosphors [29], etc., have been reported. However, ZnO remains the most commonly studied material in terms of growth procedures and material properties, as well as practical applications.…”