Materials & Design (Mar 2024)

One-pot synthesis of stable and fast Bi2O2S/Bi2O3 heterojunction self-powered photoelectrochemical sensors for sensitive detection of tetracycline

  • Baolong Shi,
  • Bingyu Chen,
  • Xinzhe Yan,
  • Huyue Cao,
  • Hao Sun,
  • Dalei Wang,
  • Changwei Bi,
  • Chao Wang,
  • Yueyue Wang,
  • Chaoqing Dai,
  • Wei Liu

Journal volume & issue
Vol. 239
p. 112781

Abstract

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The overuse of tetracycline, a broad-spectrum antibiotic, has posed a severe threat to both the ecological environment and public safety. This paper presents the one-step synthesis of Bi2O2S/Bi2O3 heterojunctions utilizing a simple and environmentally friendly chemical synthesis method. These heterojunctions were subsequently employed in the fabrication of photoelectrochemical sensors tailored for tetracycline detection. Under optimal conditions, with a bias voltage of 0 V, the sensor manifests exceptional self-powered capability, yielding a photocurrent density of approximately 270nA/cm2. The detection sensitivity for tetracycline spans a wide linear range from 0.1 pM to 200 nM, accompanied by a remarkably low detection limit of 0.5 pM (S/N = 3). Furthermore, the photoelectrochemical sensor demonstrates commendable stability, rapid response characteristics, high selectivity, and consistent detection reproducibility. These findings not only offer a novel opportunity for advancing photoelectrochemical sensors but also present a fresh perspective in the realm of photoelectrochemical sensor development.

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