Photoelectrochemical Dopamine Sensor Based on Cu-Doped Bi₂WO₆ Micro-Flowers Sensitized Cobalt Tetraaminophthalocyanine Functionalized Graphene Oxide

Abstract

This present study describes in detail the construction of a simple and inexpensive photoelectrochemical (PEC) sensor for the detection of dopamine (DA). The cobalt tetraaminophthalocyanine covalently linked graphene oxide compound (CoTAPc-GO) was synthesized successfully by covalently bonding cobalt tetraaminophthalocyanine (CoTAPc) with graphene oxide (GO). The composite of CoTAPc-GO and Cu-Doped Bi 2 WO 6 (Cu-Bi 2 WO 6 ) micro-flowers is obtained via ultrasonic treatment, and then the resulting composite was dropped onto an indium tin oxide (ITO) glass electrode to construct working electrode (CoTAPc-GO/Cu-Bi 2 WO 6 /ITO). Under visible light illumination with the chronoamperometry, the CoTAPc-GO/Cu-Bi 2 WO 6 composite material modified electrode exhibited excellent photocurrent response toward the catalytic of DA. The effects of a series of experimental conditions including coating amount, bias voltage, electrolyte, and pH value were studied. At the optimal conditions, the photocurrent response signals showed a good linear relationship with the DA concentrations in the two concentration ranges of 0.05-5.0 μmol L −1 and 5.0-250.0 μmol L −1 , and the limit of detection was 7.2 nmol L −1 (S/N = 3). The real samples of clinical drugs exhibited high accuracy and recovery rates. The composite of CoTAPc-GO and Cu-Bi 2 WO 6 provides a new way to prepare high sensitivity and high selectivity photoelectrochemical (PEC) sensors.

Novel porous iron phthalocyanine based metal–organic framework electrochemical sensor for sensitive vanillin detection

“…[32][33][34] Owing to their unique structures and various functional properties, including excellent semiconductor properties and catalytic activities, MPc derivatives have been widely used in various elds including catalysis, sensors, and photodynamic therapy. [35][36][37][38][39][40][41][42] Due to its redox activity, catalytic activity, and carrier transport ability result from the extended p-system, MPc complexes have been used as the linking units in 2D MOFs, which show good stability, conductivity, redox activity, and electrocatalytic activity. [43][44][45] Here, we developed a novel electrochemical sensor based on an iron phthalocyanine (FePc) MOF for the sensitive detection of vanillin.…”

Recent advances in electroanalytical drug detection by porphyrin/phthalocyanine macrocycles: developments and future perspectives

“…84 In addition to electrochemical sensors, ternary composites have also been employed as photoelectrochemical sensors, where at least one of their components must necessarily be photoactive. In this context, Peng and collaborators 85 reported the construction of a photoelectrochemical (PEC) sensor for the detection of dopamine (DA), as shown in the scheme of Fig. 9A.…”

A Sensitive Photoelectrochemical Sensor for Levodopa Detection Using Benzothiadiazole-Based Conjugated Microporous Polymer-Coated Graphene Heterostructures

“…In recent years, photoelectrochemical (PEC) sensors have become a research hot spot because of their low cost, wide linear range, simple operation, and high detection speed. , In a PEC sensor, the excitation signal and received signal can be fully separated, which significantly decreases the effect of background noise and increases the sensitivity of the sensor. , To date, PEC sensors have been used extensively in various fields, including drug detection, − biological antibodies or antigens, and pollutants . Photoelectric materials are core to PEC sensors.…”