Abstract
Triacetone triperoxide (TATP) is a self-made explosive synthesized from the commonly used chemical acetone (C3H6O) and hydrogen peroxide (H2O2). As C3H6O and H2O2 are the precursors of TATP, their detection is very important due to the high risk of the presence of TATP. In order to detect the precursors of TATP effectively, hierarchical molybdenum disulfide/reduced graphene oxide (MoS2/RGO) composites were synthesized by a hydrothermal method, using two-dimensional reduced graphene oxide (RGO) as template. The effects of the ratio of RGO to raw materials for the synthesis of MoS2 on the morphology, structure, and gas sensing properties of the MoS2/RGO composites were studied. It was found that after optimization, the response to 50 ppm of H2O2 vapor was increased from 29.0% to 373.1%, achieving an increase of about 12 times. Meanwhile, all three sensors based on MoS2/RGO composites exhibited excellent anti-interference performance to ozone with strong oxidation. Furthermore, three sensors based on MoS2/RGO composites were fabricated into a simple sensor array, realizing discriminative detection of three target analytes in 14.5 s at room temperature. This work shows that the synergistic effect between two-dimensional RGO and MoS2 provides new possibilities for the development of high performance sensors.
Highlights
The detection of explosives remains a challenge to the rapid development of modern life [1].The detection technology of explosives requires simple and inexpensive constituents, and the ability to detect specific explosives quickly and accurately
It can be seen from the graph that the evolution of the morphology structure of the composites varies with the ratio of reduced graphene oxide (RGO) to raw materials for the synthesis of MoS2
The raw materials for synthesis of MoS2 adsorbed on RGO first nucleate at high temperature to form
Summary
The detection of explosives remains a challenge to the rapid development of modern life [1]. Achieve detection of ambient gases at room temperature Based on these experiments, it is necessary to achieve high sensitivity, rapid response, and accurate identification detection of TATP precursor gas at room temperature. RGO-based composite materials provide hope for the sensitive detection of TATP precursors at room temperature. The Bon-Cheol Ku team reported that the MoS2 /RGO composite film can be used as a highly sensitive gas sensor that can detect concentrations of harmful gases such as NO2 as low as 0.15 ppm [35]. It is reported that the RGO/MoS2 hybrid film shows improved sensitivity to CH2 O at room temperature, and exhibits fast response characteristics and good reproducibility [36]. The effects of the ratio of RGO to raw materials for the synthesis of MoS2 on the morphology, structure, and gas sensing properties of the MoS2 /RGO composites were studied
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