School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
School of Chemistry and Chemical Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
Biosens Bioelectron. 2018 Jul 15;111:74-81. doi: 10.1016/j.bios.2018.03.054. Epub 2018 Mar 24.
As a broad-spectrum antibiotic, tetracycline (TC) is widely used in agricultural purposes and human therapy. More attention is paid to TC as a serious threat to human health, including the fast spreading of antibiotic resistance gene and the serious toxicity to aquatic organisms. Therefore, the timely and accurate determination of TC residues is an urgent task to protect the safety of human. Herein, an effective and facile photoelectrochemical sensor platform based on carbon nitride/bismuth oxyhalide (CN/BiOBr) composites can be constructed for monitoring TC. The flower-like CN/BiOBr composites are prepared via a simple one-pot ethylene glycol-assisted solvothermal process with the addition of ionic liquid 1-hexadecyl-3-methylimidazolium bromide ([Cmim]Br). In view of matched energy band positions of CN and BiOBr, the addition of CN can reduce the recombination of photogenerated electron-hole pairs and improve the efficiency of visible light utilization, leading to enhancing photoelectrochemical response of BiOBr. Under light excitation, the photocurrent of CN/BiOBr composites is drastically improved, which is 6 times as much as that of pure BiOBr. Considering the superior photoelectrochemical performance, a photoelectrochemical sensor for monitoring TC has been developed, displaying linearly enhanced photocurrent with increasing the TC concentration. Two linear relationships received are from 8.0 to 4.0 × 10 ng mL, and 4.0 × 10 to 5.2 × 10 ng mL, respectively. The detection limit is 3.8 ng mL. The photoelectrochemical sensor exhibits a series of benefits including excellent stability, a wide linear range, a low detection limit and good anti-interference ability. Therefore, this work may offer great promises in providing a universal and efficient photoelectrochemical sensor for the tetracycline detection, and pave the way of constructing more materials used in photoelectrochemical detection field.
作为一种广谱抗生素，四环素（TC）广泛应用于农业和人类治疗。由于 TC 对人类健康构成严重威胁，包括抗生素耐药基因的快速传播和对水生生物的严重毒性，因此及时准确地测定 TC 残留量是保护人类安全的当务之急。本文构建了基于氮化碳/卤氧化铋（CN/BiOBr）复合材料的有效简便光电化学传感器平台，用于监测 TC。通过在添加离子液体 1-十六烷基-3-甲基咪唑溴化物（[Cmim]Br）的条件下，采用简单的一锅乙二醇辅助溶剂热法制备了花状 CN/BiOBr 复合材料。鉴于 CN 和 BiOBr 的匹配能带位置，CN 的添加可以减少光生电子-空穴对的复合，提高可见光的利用效率，从而提高 BiOBr 的光电化学响应。在光激发下，CN/BiOBr 复合材料的光电流大大提高，是纯 BiOBr 的 6 倍。鉴于其优越的光电化学性能，开发了用于监测 TC 的光电化学传感器，显示出随着 TC 浓度增加而增强的光电流。两个线性关系分别为 8.0 至 4.0×10ng/mL 和 4.0×10 至 5.2×10ng/mL。检测限为 3.8ng/mL。光电化学传感器具有出色的稳定性、较宽的线性范围、较低的检测限和良好的抗干扰能力等一系列优点。因此，这项工作可能为提供一种通用且高效的光电化学传感器用于检测四环素铺平道路，并为构建更多用于光电化学检测领域的材料开辟道路。
