Picomolar level electrochemical detection of hydroquinone, catechol and resorcinol simultaneously using a MoS₂ nano-flower decorated graphene

Abstract

Herein, a graphene-nano-molybdenum disulphide (pGr-MoS2), synthesized from pulverized graphite and using precursors of MoS2, was investigated for the electrochemical sensing of dihydroxy benzene isomers (DHBI): hydroquinone (HQ), catechol (CA), and...

2D-Graphitic Carbon Nitride Nanosheet/Metal Nanocomposites for Electrochemical Sensors of Hydroquinone in Real Sample Analysis

“…Hydroquinone (HQ) is one of phenolic substances that have a negative impact on the quality of water resources. It is utilized for organic synthesis in industries including rubber, plastic, food, and medicine . Owing to their keratolytic, antibacterial, and antifungal properties used as a disinfectant agent and as an antiseptic for skin treatment, oral phenolic chemicals such as HQ might affect the lungs and cause infection of the throat; inhaling it can result in coughing, wheezing, and shortness of breath …”

“…It is utilized for organic synthesis in industries including rubber, plastic, food, and medicine. 1 Owing to their keratolytic, antibacterial, and antifungal properties used as a disinfectant agent and as an antiseptic for skin treatment, oral phenolic chemicals such as HQ might affect the lungs and cause infection of the throat; inhaling it can result in coughing, wheezing, and shortness of breath. 2 Excessive doses of HQ intake can result in an oxygen imbalance in the blood, which can lead to methemoglobinemia, tiredness, and even mortality.…”

Ultrastable Gold–Copper Nanoclusters on Nitrogen-Doped Graphene Quantum Dots for Selective Electrochemical and Fluorescence Sensing of Glycine

“…The survey scan spectrum of the CuNC@N-GQD (Figure 3A) exhibited the peaks of C 1s, O 1s, N 1s, and Cu 2p, whereas that of AuCuNC@N-GQD exhibited Au 4f peaks in addition to C 1s, O 1s, N 1s, and Cu 2p thus confirming the inclusion of Au. The high-resolution C 1s XPS spectrum of AuCuNC@N-GQD (Figure 3B) revealed the presence of C−C/C�C (284.7 eV), 45 C�O (287.9 eV), 46 and C�N (288 eV) 42 and that of the N 1s (Figure S4), indicating the presence of pyridinic (398.8 eV) and pyrrolic (401.1 eV) groups 37 which further confirms the inclusion of N-GQD in the formed NC. The binding energy of Au 4f 7/2 (Figure 3C) was located between 84.9 and 88.2 eV, indicating the coexistence of Au(0) and Au(I) in the AuCuNC@N-GQD.…”

Synchronized electrochemical detection of hydroquinone and catechol in real water samples using a Co@SnO2–polyaniline composite

“…Numerous techniques, including liquid chromatography, chemiluminescence, colorimetric, and electrochemical approaches, have been used for their detection to date. [6][7][8] Electrochemical detection technologies are advantageous for real-time, on-site detection. In recent years, extensive progress has been made in detecting Hq and Cat in freshwater; although there is a long way to go, detection can be achieved in seawater with complex conditions.…”

“…[13][14][15] Pollutants like hydroquinone and its isomers must be detected in saltwater if the ocean economy is to grow sustainably. Detection pretreatment methods, such as decreasing pH and removing contaminant ions, 8,16,17 are hindered by seawater's alkaline environment and ion concentration. It is therefore crucial to develop an electrode material capable of direct detection of Hq and Cat in marine settings.…”