Dos Santos José Ribamar Nascimento, Botelho Chirlene Nascimento, Caldas Greicy Kelly Cerqueira, de Menezes Alan Silva, Kubota Lauro Tatsuo, Sousa Janyeid Karla Castro, Damos Flávio Santos, de Cássia Silva Luz Rita
Department of Chemistry, Federal University of Maranhão, São Luís, MA, 65080-805, Brazil.
Department of Physics, Federal University of Maranhão, São Luís, MA, 65080-805, Brazil.
Mikrochim Acta. 2024 Sep 19;191(10):609. doi: 10.1007/s00604-024-06668-8.
Phloroglucinol (PL) or 1,3,5-trihydroxybenzene is a phenolic compound used therapeutically for its antispasmodic properties. However, an overdose or prolonged exposure to PL can have harmful effects on human health. This work describes for the first time the development of a photoelectrochemical (PEC) sensor to determine PL. The proposed sensor is based on a fluorine-doped tin oxide (FTO) substrate modified with bismuth calcium tantalate (CaBiTaO), a ceramic perovskite powder, and bismuth vanadate (BiVO). Both materials were characterized by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The morphology of the BiVO/CaBiTaO/FTO platform was evaluated using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The photoelectrochemical response of the platform was evaluated by exploiting with light from a 36 W LED lamp confined in a low-cost homemade box. The BiVO/CaBiTaO/FTO sensor showed superior photocurrent response compared to the FTO modified by the individual components (BiVO/FTO and CaBiTaO/FTO). Under optimized experimental conditions, the photoelectrochemical sensor showed two linear ranges for PL concentrations ranging from 1 up to 900 μmol L and from 900 up to 2000 μmol L, respectively. The BiVO/CaBiTaO/FTO sensor exhibited excellent results regarding precision, accuracy, and selectivity for PL detection. PL determination was successfully performed in water and artificial urine samples, with recovery values between 100.1 and 102.2%.
间苯三酚（PL）或1,3,5 - 三羟基苯是一种因其解痉特性而用于治疗的酚类化合物。然而，过量服用或长期接触PL会对人体健康产生有害影响。这项工作首次描述了一种用于测定PL的光电化学（PEC）传感器的研制。所提出的传感器基于用钽酸铋钙（CaBiTaO，一种陶瓷钙钛矿粉末）和钒酸铋（BiVO）改性的氟掺杂氧化锡（FTO）基板。两种材料均通过X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）进行了表征。使用扫描电子显微镜（SEM）和能量色散光谱（EDS）对BiVO/CaBiTaO/FTO平台的形态进行了评估。通过利用来自36 W LED灯的光（该灯被限制在一个低成本的自制盒子中）来评估该平台的光电化学反应。与由单个组分改性的FTO（BiVO/FTO和CaBiTaO/FTO）相比，BiVO/CaBiTaO/FTO传感器显示出优异的光电流响应。在优化的实验条件下，该光电化学传感器对PL浓度分别在1至900 μmol/L和900至2000 μmol/L范围内呈现两个线性范围。BiVO/CaBiTaO/FTO传感器在PL检测的精密度、准确度和选择性方面表现出优异的结果。在水和人工尿液样本中成功进行了PL测定，回收率在100.1%至102.2%之间。
