Ultra-High Response Detection of Alcohols Based on CdS/MoS2 Composite

Abstract

Hybrid CdS/MoS2 with branch and leaf shaped structures are successfully synthesized by hydrothermal method. It is applied to detect volatile organic compounds, a basic source of indoor air pollution with deleterious effects on the human health. The sensor based on CdS/MoS2 displays an outstanding response to alcohols among numerous gases. Their response to 100 ppm ethanol and isopropanol reaches 56 and 94, respectively. Benefiting from the dendrite-like biomimetic structure and synergy effect of CdS and MoS2, the sensor exhibits higher response than traditional gas sensor. For multiple alcohols, the limit of detection reached ppb level. In addition, by comparing the response of ethanol, isopropanol, isoamyl alcohol and their mixtures with acetone and methanal, a strong resistance interference is observed. This work proved that the modified detector holds broad promise in the detection of alcohols.

Positioning hydrogen reaction sites by constructing CdS/CoNiMoS4 heterojunctions for efficient photocatalytic hydrogen evolution

“…2(b) and (c) at binding energies of 404.28 eV, 411.03 eV, 160.82 eV and 162.03 eV, respectively, can be attributed to Cd 3d 5/2 , Cd 3d 3/2 , S 2p 3/2 , and S 2p 1/2 . 22,36,37 Additionally, the spectra of Co shown in Fig. 2(d) demonstrate a unique spin–orbit doublet feature, which includes two distinctive peaks corresponding to the energy values, 779.69 eV and 795.78 eV, associated with Co 2p 3/2 and Co 2p 1/2 , possessing a chemical state of Co +2.…”

Enhanced H2S Gas-Sensing Performance of Ni-Doped ZnO Nanowire Arrays

“…The resistance of the sensor changed. Finally, the cavity cover was removed for desorption . All measurements were performed in a well-ventilated laboratory.…”

“…Finally, the cavity cover was removed for desorption. 30 All measurements were performed in a well-ventilated laboratory. The dehumidifier retained the relative humidity at 45%.…”

High Sensing Performance Toward Acetone Vapor Using TiO2 Flower-Like Nanomaterials

“…It shows that the fitting curves versus concentration of acetone toward 10-500 ppm, the correlated coefficients (R 2 ) is 0.9913 indicating an outstanding linear-dependent relationship between the response and concentration. Another important parameters limit of detection (LOD) are also calculated [30][31][32]. The LOD of acetone is 0.65 ppm which is lower than the detection limit for diabetes in exhaled air.…”