Experimental and theoretical study on the excellent amine-sensing performance of Au decorated WO3 needle-like nanocomposites
Yan S., Wang Y., Fu H., Wang W., Han D., An X.
Materials Chemistry and Physics
Vol.234, P. 122-132
Опубликовано: 2019
Тип ресурса: Статья
DOI:10.1016/j.matchemphys.2019.05.070
Аннотация:
This study reports a facile strategy to assemble excellent amine-sensing nanocomposites consisting of WO3 nanoneedles and Au nanoparticles through surface modification. Consequently, the Au decorated WO3 nanocomposites were synthesized using a hydrothermal method coupled with the in-situ reduction reaction. The resulting WO3 nanoneedles were measured to be ∼10 μm in length with unequal diameters along the growth direction. Specifically, the tip diameters were of 100 ± 15 nm, and the widest diameters were of 200 ± 15 nm. Furthermore, Au nanoparticles with sizes of ∼5 nm were evenly distributed on the surface of WO3 nanoneedles. The gas-sensing performance of the WO3 nanoneedles and the Au modified WO3 nanocomposites were evaluated by testing the change of resistance in the resulting materials toward various concentrations of 1-butylamine. It was found that the net WO3 nanoneedles alone are capable of offering an excellent response (15.1–100 ppm of 1-butylamine at the optimized working t
Ключевые слова:
Gas sensing mechanism; Gas sensors; Organic amines; Surface modification; WO3 nanoneedles
Acetone; Amines; Ammonia; Chemical detection; Chemical sensors; Density functional theory; Gas detectors; Gold nanoparticles; Nanocomposites; Nanoneedles; Nanoparticles; Surface treatment; Tungsten compounds; Adsorption energies; Chemical sensitization; Gas sensing mechanism; Hydrothermal methods; Organic amine; Resulting materials; Sensing performance; Working temperatures; Gold
Язык текста: Английский
ISSN: 1879-3312
Yan S. Syaokhun 1984-
Wang Y.
Fu H.
Wang W.
Han D.
An X.
Ян С. Сяохун 1984-
Wанг Y.
Фу Х.
Wанг W.
Хан Д.
Ан Х.
Experimental and theoretical study on the excellent amine-sensing performance of Au decorated WO3 needle-like nanocomposites
Текст визуальный непосредственный
Materials Chemistry and Physics
Elsevier Science Publisher B.V.
Vol.234 P. 122-132
2019
Статья
Gas sensing mechanism Gas sensors Organic amines Surface modification WO3 nanoneedles
Acetone Amines Ammonia Chemical detection Chemical sensors Density functional theory Gas detectors Gold nanoparticles Nanocomposites Nanoneedles Nanoparticles Surface treatment Tungsten compounds Adsorption energies Chemical sensitization Gas sensing mechanism Hydrothermal methods Organic amine Resulting materials Sensing performance Working temperatures Gold
This study reports a facile strategy to assemble excellent amine-sensing nanocomposites consisting of WO3 nanoneedles and Au nanoparticles through surface modification. Consequently, the Au decorated WO3 nanocomposites were synthesized using a hydrothermal method coupled with the in-situ reduction reaction. The resulting WO3 nanoneedles were measured to be ∼10 μm in length with unequal diameters along the growth direction. Specifically, the tip diameters were of 100 ± 15 nm, and the widest diameters were of 200 ± 15 nm. Furthermore, Au nanoparticles with sizes of ∼5 nm were evenly distributed on the surface of WO3 nanoneedles. The gas-sensing performance of the WO3 nanoneedles and the Au modified WO3 nanocomposites were evaluated by testing the change of resistance in the resulting materials toward various concentrations of 1-butylamine. It was found that the net WO3 nanoneedles alone are capable of offering an excellent response (15.1–100 ppm of 1-butylamine at the optimized working t