Controllable Synthesis of Pt Functionalized Black Phosphorus (BP) Nanocomposite for High Performance NOx Gas Sensor.

Compared with bulk material-based sensors, functional sensors fabricated with nanomaterials have many advantages, such as high sensitivity, multifunctional integration, low power-dissipation, and low cost. Black phosphorus (BP) is a two-dimensional (2D) crystal material, which has a higher molecular adsorption energy, tunable direct band gap, high carrier mobility, ambipolar characteristics, and high current on/off ratio. In this paper, BP bulk was ground into powder, and then the powder was dispersed in dimethylformamide (DMF) to obtain two-dimensional BP nanosheets solution. Afterwards, the black phosphorus nanosheets and H₂PtCl6 solution were mixed to obtain the Pt functionalized BP nanocomposite by one-step reduction method. Pt nanoparticles were dispersed on the surface of BP nanosheets with highly uniform size. The Pt functionalized BP nanocomposite exhibited a high response of 2.19 to 10 ppm NOx in a short period of 1.93 s at room temperature. The detection limit was as low as 30 ppb. The Pt functionalized BP nanocomposite will be useful for precise detection of NOx.

Citation

Ying Liang, Hongmei Bi. Controllable Synthesis of Pt Functionalized Black Phosphorus (BP) Nanocomposite for High Performance NOx Gas Sensor. Journal of nanoscience and nanotechnology. 2021 Sep 01;21(9):4786-4791

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PMID: 33691867

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