The heterostructured NiWO4/WO3 nanotubes (Ni/W NTs) were synthesized by using a facile self-assembly method on the sacrificial polystyrene (PS) nanofibers templates. Then, the Pt-decorated NiWO4/WO3 (Pt@Ni/W) composite NTs were obtained through using an ultrasonic mixing method. The experimental results display that the order of gas-sensing performance is Pt@Ni/W>Ni/W>WO3. The 2wt.%Pt@Ni/W-5 NTs indicate the supreme acetone-sensing response (Rair/Rgas=58.4 at 100×10-6) at 375 °C, which is 10.6 and 1.53 times that of the WO3 and NiWO4/WO3 NTs, respectively. Additionally, the 2wt.%Pt@Ni/W-5 NTs also exhibit the dramatically high selectivity toward acetone against ethanol, methanal, methanol, NH3 and toluene. The Pt-decorated Ni/W NTs show the excellent responsivity and stability toward acetone, which is ascribed to the construction of heterostructured NiWO4/WO3 and the spill-over effect of Pt nanoparticles.
Yong-ping CUI, Ya-ru SHANG, Rui-xia SHI, Quan-de CHE, Jun-peng WANG
. Pt-decorated NiWO4/WO3 heterostructure nanotubes for highly selective sensing of acetone[J]. Transactions of Nonferrous Metals Society of China, 2022
, 32(6)
: 1981
-1993
.
DOI: 10.1016/S1003-6326(22)65924-7
