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Silver vanadium oxides (SVOs) have attracted increasing attention due to their excellent physicochemical properties and diverse applications in fields of batteries, gas sensors, surface enhanced Raman spectroscopy (SERS), etc. These findings may be useful in designing promising materials to detect amine gases for medical or food industrial applications. Moreover, the density functional theory (DFT) simulation was conducted to better understand the sensing mechanism. It is found that the nanobelts show superior sensitivity of amine(s) to V 2O 5 particles, lower detection limit (5 ppm), and higher selectivity of amine versus ammonia at an optimized working temperature of ~260 ☌. The gas sensing performance of the Ag 0.35V 2O 5 nanobelts towards organic amine was tested. According to N 2 sorption isothermals, the as-prepared Ag 0.35V 2O 5 nanobelts are found to exhibit relative high surface area. The results show that SDS, as a weak reducing agent, plays a crucial role in the formation of Ag 0.35V 2O 5. The mechanism of the formation and growth of Ag 0.35V 2O 5 nanobelts was also investigated and discussed. And several advanced techniques, such as TEM, HRTEM, X-ray diffraction (XRD), were used to characterize the morphology and composition of the as-prepared nanobelts. The experimental variables that may affect the nanoparticle structures were investigated. A simple hydrothermal method for the synthesis of Ag 0.35V 2O 5 nanobelts with the assistance of sodium dodecyl sulfate (SDS) is reported in this study.