A room temperature operated ammonia gas sensor based on Ag-decorated TiO₂ quantum dot clusters

Abstract

In this research, nanometer size aggregates (clusters) of titanium dioxide (TiO2) quantum dot clusters (QDs) have been successfully prepared via a convenient hydrolysis method at a low temperature (80 °C).

Effect of Annealing Temperature on Spatial Atomic Layer Deposited Titanium Oxide and Its Application in Perovskite Solar Cells

“…Among a wide variety of metal oxides, TiO 2 is a promising material for many emerging applications, such as gas sensors [1,2], dye-sensitized solar cells [3,4], photocatalysis [5] and gate insulators in metal-oxide-semiconductor field-effect transistors [6]. The characteristics of TiO 2 thin films prepared by sol-gel, chemical vapor deposition or sputtering have been extensively studied [7][8][9][10].…”

Effect of Ag Addition on the Gas-Sensing Properties of Nanostructured Resistive-Based Gas Sensors: An Overview

“…In the above sections, we have described the effect of Ag decoration on the gas response of resistive-based gas sensors. Table 1 [48][49][50][51][52]54,60,65,66,69,70,72,74,76,77,80,[85][86][87][88][89][90][91][92][93][94][95] shows the gas-sensing performances of Ag-loaded SMO-based sensors for various toxic gases. In addition, other researchers [95][96][97][98][99][100][101][102][103][104][105][106][107][108][109] have reported enhanced gas sensing after Ag decoration.…”

“…Table 1 [48][49][50][51][52]54,60,65,66,69,70,72,74,76,77,80,[85][86][87][88][89][90][91][92][93][94][95] shows the gas-sensing performances of Ag-loaded SMO-based sensors for various toxic gases. In addition, other researchers [95][96][97][98][99][100][101][102][103][104][105][106][107][108][109] have reported enhanced gas sensing after Ag decoration. Depending on the type of SMO and the synergistic effects between Ag and SMO, the sensing temperature can vary from room temperature to high temperatures.…”

“…Table 2 presents the sensing properties of Ag-doped SMO-based gas-sensing devices [92][93][94][95][96][97][98][99][100][101][102][103][104][105][106][107]. Different gases at various temperatures can be detected by doping Ag into the pristine sensing device, which suggests the promising role of Ag as a noble metal dopant in the detection of toxic gases.…”

High sensitive room temperature ammonia sensor based on dopant free m-WO3 nanoparticles: Effect of calcination temperature

“…Wang et al [14] have studied WO 3 nanofibers for ammonia gas detection at an operating temperature of 623 K. Wu et al [15] reported an ammonia sensor based on graphene/PANI nanocomposite with a response of about 11 for 100 ppm. Liu et al [16] have studied the Ag-decorated Titanium oxide quantum dot clusters for ammonia detection at room temperature. Recently Wang et al [17] have investigated the gas sensing performance of closely packed WO 3 microspheres for ammonia detection with a response of 3.2 towards 100 ppm ammonia.…”