Photocatalytic degradation and low-concentration detection of tetracycline (TC) are often limited by the high recombination ratio of carriers and low sensitivity. Herein, we synthesized Bi₄Ti₃O₁₂ nanosheets (BiTO NSs) by a molten salt method and decorated them with silver nanoparticles (Ag NPs) to obtain BiTO/Ag heterojunctions for degradation via piezo-photocatalysis and detection by surface enhanced Raman spectroscopy (SERS). The synergetic effect originating from piezoelectricity and surface plasmon resonance (SPR) can improve the photon utilization, resulting in an enhancement in the catalytic performance and detection sensitivity. The reduction of TC by BiTO/Ag was as high as 92.1% within 120 min in a solution of 10 ppm, and the limit of detection (LOD) can reach 0.01 ppm. This work offers a new strategy to achieve the effective degradation and high-sensitivity detection of TC by a BiTO/Ag bifunctional heterojunction material.

中文翻译：

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光压电效应下双功能Bi4Ti3O12/Ag异质结对四环素的降解和检测


四环素（TC）的光催化降解和低浓度检测往往受到载流子复合率高和灵敏度低的限制。在此，我们通过熔盐法合成了 Bi ₄ Ti ₃ O ₁₂ 纳米片（BiTO NSs），并用银纳米颗粒（Ag NPs）修饰，得到BiTO/Ag 异质结通过压电光催化降解并通过表面增强拉曼光谱 (SERS) 进行检测。压电和表面等离子体共振（SPR）的协同效应可以提高光子利用率，从而提高催化性能和检测灵敏度。 BiTO/Ag在10 ppm溶液中120 min内对TC的还原率高达92.1%，检测限（LOD）可达0.01 ppm。这项工作为通过BiTO/Ag双功能异质结材料实现TC的有效降解和高灵敏度检测提供了一种新策略。