期刊
BIOSENSORS & BIOELECTRONICS
卷 111, 期 -, 页码 74-81出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2018.03.054
关键词
BiOBr; Carbon nitride; Heterojunction; Photoelectrochemical sensor; Tetracycline
类别
资金
- National Natural Science Foundation of China [21506081, 21576123, 21705058]
- Jiangsu University [15JDG048]
- Provincial Natural Science Foundation of Jiangsu [BK20170524]
- University Natural Science Research of Jiangsu [15KJB530004]
- Chinese Postdoctoral Foundation [2016M590420]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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 ([C(16)mim]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 x 10(2) ng mL(-1), and 4.0 x 10(2) to 5.2 x 10(3) ng mL(-1), respectively. The detection limit is 3.8 ng mL(-1). 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.
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