Detection Of Hydroquinone Research Articles

Detection of Hydroquinone in Carboxylated Multi-walled Carbon Nanotube/Poly(N,N-dimethylacrylamide) Binary Structured Films and Study of Logic Gate System

Detection of Hydroquinone in Carboxylated Multi-walled Carbon Nanotube/Poly(N,N-dimethylacrylamide) Binary Structured Films and Study of Logic Gate System

Tb-based Metal-Organic Framework-Referenced Fluorescence Assay for Distinguishing Hydroquinone from Its Isomers and Subsequent Quantitative Visual Detection of Cu2.

Hydroquinone (HQ) and copper ions (Cu2+) are categorized as environmental pollutants that are severely limited in water. Designing a selective assay for discriminating HQ from its two isomers and the convenient determination of Cu2+ is of great importance. Herein, a Tb-based metal-organic framework (Tb-MOF) and HQ are assembled innovatively into a ratiometric fluorescence nanoprobe to selectively distinguish HQ and subsequent quantitative visual detection of Cu2+. The native blue emission of HQ at 338 nm is used as a response signal, while Tb-MOF with green fluorescence offers a reference signal at 545 nm. Notably, neither resorcinol (RC) nor catechol (CC) exhibits obvious emission under the same experimental conditions, which enables discriminating HQ from its isomers. Thus, a ratiometric fluorescence method has been designed for the selective detection of HQ with the fluorescence intensity ratio F338/F545 as the readout. The redox reaction between HQ and Cu2+ induces fluorescence quenching of HQ and no change to that of Tb-MOF, resulting in a noticeable color variation from blue-green to green via the naked eye. Furthermore, sensitive visual detection of Cu2+ is achieved with a low detection limit of 1.67 μM using a smartphone. The satisfactory recoveries and good repeatability of quantitative visualization determined in spiked water samples make this sensing platform suitable for on-site monitoring of environmental samples.

Michael and Schiff-Base Reactions-Assisted Fluorescence Sensor Based on the MOF Nanosheet Microspheres for the Effective Discrimination and Detection of Hydroquinone and Catechol.

A novel sensing platform was constructed for the recognition and identification of dihydroxybenzene isomers based on the MOF-0.02TEA fluorescence sensor with the morphology of nanosheet microspheres through coordination modulation. Based on the sensing principle that the amino group on the MOF-0.02TEA can make the Michael reaction with o-benzoquinone and p-benzoquinone, which were individually the oxidation intermediate of catechol and hydroquinone, the fluorescence intensity of MOF-0.02TEA could be quenched through the inner filter effect (IFE) without the interference from resorcinol. Besides, catechol and hydroquinone could be further distinguished with the assistance of the Schiff-base reaction by introducing o-phenylenediamine (OPD) to the detection system. The MOF-0.02TEA sensor exhibited good selectivity, and the detection limits for catechol and hydroquinone were 90.5 nmol/L and 0.52 μmol/L (S/N = 3), respectively. Moreover, the sensor could be used for the determination of dihydroxybenzene isomers in tap water and lake water.

Synthesis of the immobilized laccase on N-doped carbon nanonets for photothermal detection of hydroquinone

Synthesis of the immobilized laccase on N-doped carbon nanonets for photothermal detection of hydroquinone

The smartphone-assisted sensing platform based on manganese dioxide nanozymes for the specific detection and degradation of hydroquinone.

Hydroquinone (HQ) is a prevalent pollutant in aquatic environments, posing significant risks to ecosystems and human health. Practical methods for the simultaneous detection and degradation of HQ are essential. To address this requirement, a dual-mode detection and degradation strategy has been developed utilizing designed nanozymes (DM) consisting of a porous SiO2 core and MnO2 shell. Due to the catalytic activity of DM nanozymes, the three types of reactive oxygen species (ROS), singlet oxygen (1O2), superoxide anion (O2•-), and hydroxyl radical (•OH), were generated to induce the color transferring of 3,3',5,5'-tetramethylbenzidine (TMB) from colorless to blue form (oxTMB). During the reductive HQ-mediated oxTMB fading, the DM has significant selectivity towards HQ from isomers (catechol and resorcinol) due to the differing reductive reaction rates, with an excellent linear range of 0.2-45 μM with a detection limit as low as 0.11 μM. In addition, according to the color parameter changes in the sensing process, colorimeters and smartphones are utilized to achieve on-site and convenient HQ detection. Besides, the DM nanozyme can oxidatively decompose HQ without auxiliary equipment. We believe this research provides a powerful tool for detecting and removing HQ precisely.

Electrochemical Simultaneous Determination of Biohazardous Polyphenols Using a Novel Mesoporous Nickel-Modified Carbon Sensor

The widespread occurrence of endocrine disruptor compounds in wastewater has garnered significant attention owing to their toxicity, even at low concentrations, and their persistence in the water body. Among various analytical techniques, electrochemical sensors have become the preferred tools for the environmental monitoring of water pollutants due to their low cost, rapid detection, high sensitivity, and selectivity [1,2]. In this study, the mesoporous Ni (MNi) material was synthesized with an innovative method using Pluronic™ F-127 as a soft template and applied as a modifier for the simultaneous electrochemical sensing of hydroquinone (HQ), catechol (CC), bisphenol A (BPA), and bisphenol S (BPS) [3]. MNi with high porosity efficiently enhanced the redox-active surface area and conductivity of the glassy carbon electrode contributing to a significantly improved sensitivity in the detection of target chemicals. The pore size and surface area of MNi were estimated based on atomic force microscopy. The limit of detection for HQ, CC, BPA, and BPS was determined to be 5.3, 5.7, 5.6, and 61.5 nM, respectively. The electrochemical sensor presented in this study holds promise as a platform for developing portable and miniaturized tools offering the rapid and sensitive detection of these biohazardous polyphenolic compounds in environmental water samples.References G. Hanharan et al., J. Environ. Monit. 2004, 6, 657-664.S. Sultana et al., J. Electroanal. Chem. 2021, 899, 115644.Y. Xue et al., Chemosphere 2023, 342, 140003.

Dimethylglyoximate Derived Nickel Oxide Nanowires for Trace Level Amperometric Detection of Hydroquinone

Dimethylglyoximate Derived Nickel Oxide Nanowires for Trace Level Amperometric Detection of Hydroquinone

A “turn-on” fluorescence sensor for hydroquinone detection based on BSA doped carbon dots (BSA@CDs) from crawfish shells

By using crawfish shells as the precursor and hydrothermal synthesis, Bovine serum albumin doped carbon dots (BSA@CDs) were prepared without excessive chemical reagents. The relationship between the fluorescence properties of different BSA@CDs and BSA amount was investigated by variouscharacterization techniques. When the amount of BSA added was 30 %, the prepared BSA@CDs’ quantum yield (QY) reached 25.01 %, which was the highest. Inner Filter Effect (IFE) suggested that Cr (VI) can selectively quench the fluorescence of BSA@CDs. Cr (VI) can be reduced to Cr (III) by Hydroquinone (HQ), thus recovering the fluorescence. Accordingly, using BSA@CDs as a probe, a “turn-on” fluorescence sensor applied in HQ determination was constructed. The linear range was 10–200 µmol/L and limit of detection (LOD) was 0.18 µmol/L. Further, it has been employed to the determination of HQ in both crawfish tail meat and aquaculture water with good performance.

Conductive Carbon from Taro Stems for Simultaneous Detection of Hydroquinone and Catechol

Conductive Carbon from Taro Stems for Simultaneous Detection of Hydroquinone and Catechol

Simultaneous electrochemical detection of hydroquinone and catechol using a carbon nanotube paste electrode modified with electrochemically polymerized L-alanine

Simultaneous electrochemical detection of hydroquinone and catechol using a carbon nanotube paste electrode modified with electrochemically polymerized L-alanine

A stable and efficient electrochemical sensor for hydroquinone and catechol detection in real-world water samples using mesoporous CaM@rGO nanocomposite

Hydroquinone (HQ) and catechol (CC) are widespread environmental pollutants known for their high toxicity and poor biodegradability. Herein, we devised an electrochemical sensor for sensitive and selective detection of HQ and CC. The glassy carbon electrode (GCE) was meticulously modified by using the Ca-perovskite (CaTiO3/GCE), zinc-based metal-organic frameworks (Zn-MOF/GCE), and their nanocomposite with reduced graphene oxide (rGO), i.e., CaTiO3-Zn-MoF@rGO/GCE (CaM@rGO/GCE). The CaM@rGO/GCE sensor showed stupendous electrochemical performance due to the synergistic effects of rGO's high conductivity and Ca-perovskite's electrocatalytic activity. Furthermore, the Zn-MOF component ensures the sensor's remarkable stability. The developed sensor boasts impressive selectivity towards HQ and CC, achieving exceptionally low detection limits (0.0086 µM (S/N = 3) for HQ, 0.0115 µM (S/N = 3) for CC), and broad linear ranges (0.05–105 µM for HQ, 0.05–120 µM for CC). The sensor shows better sensitivity to hydroquinone (HQ) than catechol (CC) due to the absence of intramolecular hydrogen bonding in HQ. The sensor's real-world applicability was validated by analyzing environmental water samples, demonstrating its immense potential for practical environmental monitoring.

An innovative approach utilizing bimetallic Ag@Sn-oxy nanocomposite with rGO-decorated glassy carbon-modified electrode for high-performance detection of hydroquinone

An innovative approach utilizing bimetallic Ag@Sn-oxy nanocomposite with rGO-decorated glassy carbon-modified electrode for high-performance detection of hydroquinone

Simultaneous electrochemical detection of hydroquinone and catechol using flexible laser-induced metal-polymer composite electrodes

The conversion of waste polymers into functional materials presents a promising approach for PET upcycling. In this study, we exploit PET transformed into a Laser-Induced Graphene/Al NPs/PET nanocomposite (LIMPc − Laser-Induced Metal-Polymer composite) modified with electrodeposited gold nanoparticles (AuNPs). The morphology and structure of the material were investigated by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and X-ray photoelectron spectroscopy (XPS). The nanocomposite was employed as a flexible electrochemical sensor for the simultaneous electrochemical detection of hydroquinone (HQ) and catechol (CT). The LIMPc-plasma-NaOH-Au composite displayed well-defined oxidation peaks for HQ and CT during electrochemical analysis, with limits of detection (LOD) as low as 47 nM for CT and 56 nM for HQ, within a linear range of 0.1–300 μM for both compounds. The long-term stability of LIMPc-plasma-NaOH-Au and its performance in real sample analysis demonstrate its potential for environmental monitoring applications.

A novel fluorescence sensor film for hydroquinone based on a graphene quantum dots-nano activated carbon composite

A novel film sensor, composed of graphene quantum dots-nano activated carbon, chitosan, and PVA, offers a simple and effective hydroquinone (HQ) detection. This film exhibits impressive HQ adsorption under ambient conditions (room temperature, pH 7, 3 h) and utilizes a readily observable fluorescence color change for quantification. Upon HQ binding, the film's fluorescence color shifts from yellow-green to blue, enabling a linear detection range of 1.0–150 mg⋅L−1 based on intensity analysis of the blue component (B value). Calibration curves generated on the same day (n = 3) exhibit high precision, with standard deviations of the linear equation parameters below 0.014 and a low detection limit of 0.5 mg⋅L−1. The film exhibits exceptional stability, retaining its color and performance for up to 20 days. This stability is further corroborated by recovery experiments utilizing HQ-spiked water samples at concentrations of 2.5 mg⋅L−1 and 40 mg⋅L−1, where recoveries of 106 % and 95 % were achieved, respectively. These results demonstrated the sensor's reliable quantification capabilities. Notably, the sensor exhibited insignificant interference from commonly co-existing substances such as ethanol, ascorbyl glucoside, arbutin, kojic acid, and methylene blue. However, Cu²⁺, Fe³⁺, and catechol did cause some interference. This versatility, coupled with its straightforward operation, makes the film sensor a promising candidate for on-site HQ detection in diverse environmental monitoring applications.

Cu Single Atoms Embedded in N-Doped Hollow Carbon Spheres for Simultaneous Electrochemical Detection of Hydroquinone and Catechol

Cu Single Atoms Embedded in N-Doped Hollow Carbon Spheres for Simultaneous Electrochemical Detection of Hydroquinone and Catechol

Novel electrochemical ZnO/MnO2/rGO nanocomposite-based catalyst for simultaneous determination of hydroquinone and pyrocatechol.

An innovative electrochemical sensing method is introduced for dihydroxy benzene (DHB) isomers, specifically hydroquinone (HQ) and pyrocatechol (PCC), employing a zinc-oxide/manganese-oxide/reduced-graphene-oxide (ZnO/MnO2/rGO) nanocomposite (NC) as an electrode modifier material. Comprehensive characterization confirmed well-dispersed ZnO/MnO2 nanoparticles on rGO sheets. Electrochemical analysis revealed the ZnO/MnO2/rGO-NC-based modified electrode possesses low electrical resistance (126.2 Ω), high electrocatalytic activity, and rapid electron transport, attributed to the synergies between ZnO, MnO2 and rGO. The modified electrode demonstrated exceptional electrochemical performance in terms of selectivity for the simultaneous detection of HQ and PCC. Differential pulse voltammetry studies validated the proposed sensor's ability to detect HQ and PCC within linear response ranges of 0.01-115 μM and 0.03-60.53 μM, with detection limits of 0.0055 µM and 0.0053 µM, respectively. Practical validation using diverse water samples showcased excellent percent recovery of HQ and PCC using the ZnO/MnO2/rGO-based electrochemical sensor, underscoring the sensor's potential for real-world applications in environmental monitoring.

Boron-doped g-C3N4 supporting Cu nanozyme for colorimetric-fluorescent-smartphone detection of α-glucosidase

BackgroundDue to that the higher activity of nanozymes would bring outstanding performance for the nanozyme-based biosensing strategies, great efforts have been made by researchers to improve the catalytic activity of nanozymes, and novel nanozymes with high catalytic activity are desired. Considering the crucial role in controlling blood glucose level, strategies like colorimetric and chemiluminescence to monitor α-glucosidase are developed. However, multi-mode detection with higher sensitivity was insufficient. Therefore, developing triple-mode detection method for α-glucosidase based on great performance nanozyme is of great importance. ResultsIn this work, a novel nanozyme Cu–BCN was synthesized by loading Cu on boron doped carbon substrate g-C3N4 and applied to the colorimetric-fluorescent-smartphone triple-mode detection of α-glucosidase. In the presence of H2O2, Cu–BCN catalyzed the generation of 1O2 from H2O2, 1O2 subsequently oxidized TMB to blue colored oxTMB. In the presence of hydroquinone (HQ), the ROS produced from H2O2 was consumed, inhibiting the oxidation of TMB, which endows the possibility of colorimetric and visual on-site detection of HQ. Further, due to that the fluorescence of Mg-CQDs at 444 nm could be quenched by oxTMB, HQ could also be quantified through fluorescent mode. Since α-glucosidase could efficiently hydrolyze α-arbutin into HQ, the sensitive detection of α-glucosidase was realized. Further, colorimetric paper-based device (c-PAD) was fabricated for on-site α-glucosidase detection. The LODs for α-glucosidase via three modes were 2.20, 1.62 and 2.83 U/L respectively, high sensitivities were realized. SignificanceThe nanozyme Cu–BCN possesses higher peroxidase-like activity by doping boron to the substrate than non-doped Cu–CN. The proposed triple-mode detection of α-glucosidase is more sensitive than most previous reports, and is reliable when applied to practical sample. Further, the smartphone-based colorimetric paper-based analytical device (c-PAD) made of simple materials could also detect α-glucosidase sensitively. The smartphone-based on-site detection provided a convenient, instrument-free and sensitive sensing method for α-glucosidase.

Electrochemical detection of hydroquinone as an environmental contaminant using Ga2O3 incorporated ZnO nanomaterial

The primary objective of this research endeavor is to develop a highly sensitive and selective electrochemical sensor for the accurate detection of hydroquinone (HQ), a prevalent environmental contaminant. To achieve this, we employed a novel nanocomposite consisting of Ga2O3-doped ZnO (Ga2O3.ZnO) as the active nanomaterial for fabricating a glassy carbon electrode (GCE). The structure and morphology of the Ga2O3.ZnO nanocomposite were rigorously analyzed using a diverse range of techniques to ensure its suitability as the sensing nanomaterial. This innovative sensor exhibits remarkable capabilities, enabling the detection of HQ across a broad concentration range, spanning from 1 to 11070 µM, in a neutral phosphate buffer solution. It boasts an exceptionally high sensitivity of 1.0229 µA µM−1 cm−2 and an impressive detection limit of 0.063 µM. Thanks to its exceptional sensitivity and specificity, this sensor can precisely quantify HQ levels in real-world samples. Moreover, its outstanding reproducibility, repeatability, and stability establish it as a dependable and resilient choice for HQ determination.

Electrochemical detection of hydroquinone in wastewater using polypyrrole-graphene nanocomposite-modified glassy carbon electrode

Electrochemical detection of hydroquinone in wastewater using polypyrrole-graphene nanocomposite-modified glassy carbon electrode

A tailor-made fluorescent ionic liquid integrating tetrapropylammonium hydroxide with 1-naphathoic acid to construct a dual-emitting fluoroprobe for sensing hydroquinone in environmental waters

Herein, a dual-emitting fluoroprobe was pioneered for the sensitive and selective detection of hydroquinone (HQ) in environmental waters, which was based on integration of a tailor-made fluorescent ionic liquid ([TBAOH][NA]) with Eu3+ (([TBAOH][NA]/Eu3+). HQ could substantially enhance the 365-nm fluorescence intensity (FI365) of [TBAOH][NA]/Eu3+, whereas no prominent variation ocurred in FI615. After HQ binding with [TBAOH][NA], the electronic structure of S1 was completely pi-pi*, and the orbital overlap of the latter was much higher, thereby promoting photon transitions. After some key factors were optimized using a central-composite-design (CCD) approach, this fluroprobe provided a linear response from 0.5 to 100 μM and detection limit of 0.15 μM for HQ assay, which was comparable to analytical performance by conventional HPLC-DAD analysis. Overall, the prominent advantages of as-developed fluoroprobe lie in two aspects: (1) Employing the ratio of two well-resolved emission and significantly differential responses to HQ greatly enhance sensitivity and accuracy through a self-calibration system; and (2) [TBAOH][NA] has not only the superiority of “green solvent” like conventional ionic liquids, but also possesses strong luminescence signal owing to introducing 1-naphathoic acid as an anion into tetrapropylammonium hydroxide. Consequently, this dual-emitting fluoroprobe is endowed with great potential in on-site and outdoor HQ monitoring.