International Journal of Electrochemical Science
·
2023
·Vol. 14
·期 2
·1794-1808
·
IF 1.5
Hua Zhang,Huaixiang Li,Jiao Li,Haibin Sun,Lixia Zhou,Ruihua Wang
Herein, a graphene (Gr) and silicon nanowires (SiNWs) decorated n-silicon/platinum (Si/Pt) sensor was put forward to detect hydroquinone (HQ) in a photoelectrochemical (PEC) way. Platinum film was coated on the polished side of the n-silicon wafer by vacuum evaporation and SiNWs were fabricated uniformly on the other side of the wafer by electrochemical etching in a solution mixed by HF and ethanol with volume ratio 1:1 under illumination of scattered laser. The morphology and component of the SiNWs was characterized by SEM and EDS, respectively. The photoelectric properties of the SiNWs-Si/Pt were studied by semi-log current-voltage (log I–V) and photoresponse measurements. Results show that the SiNWs on the Si wafer enhance the photoelectric conversion efficiency of the Si/Pt Schottky junction by about 33% relative to Si/Pt without SiNWs. Then, graphene was prepared with Hummer method and was used to decorated the SiNWs-Si/Pt wafer to build a Gr-SiNWs-Si/Pt PEC sensor. The new sensor was used to detect HQ in a two-electrode PEC way at zero bias voltage in a linear range of 10-300 μM with a detection limit of 0.3 μM (S/N=3). Excellent selectivity of the sensor to HQ in the present of catechol (CC) and other interferences was proved by anti-interference experiment.
研究领域:
材料科学
·
环境监测
·
分析化学
·
纳米技术
·
光电化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2017
·
IF 3.684
Lala Rukh Sidra,Guofei Chen,Nafeesa Mushtaq,Lubo Xu,Xiaoqi Chen,Yantao Li,Xingzhong Fang
To extend the upper operating temperature range of melt processable PIs , two series of end-capped copolyimides based on hydroquinone diphthalic anhydride (HQDPA) isomers were designed by varying the contents of appropriate diamines. Thus, copolyimides PI-(0a∼20a) based on 3,3′-HQDPA were prepared by varying the ratio of rigid 2-(4-aminophenyl)-5-aminobenzimidazole (BIA) and flexible 4,4′-oxydianiline (ODA). The resulting copolyimides demonstrated good properties, such as excellent solubility, high T g ranging from 328 to 354 °C as determined by dynamic mechanical analyzer (DMA), besides, exhibited good thermal stability based on 5% weight loss temperature ( T 5% ) of 502–514 °C and low melt viscosity in the range of 291–935 Pa·s. Most importantly, PI-20a showed a good combination of low melt viscosity simultaneously with significantly high T g (328 °C). Furthermore, this system was modified by copolymerization with different feed ratio of 4,4′-HQDPA isomer and produced another series PI-(20a∼20e), that exhibited high T g in the range of 315–330 °C with T 5% of 502–543 °C and minimum complex viscosity in the range of 291–479 Pa·s. All PIs form tough and flexible films that have remarkable tensile strength and moduli in the range of 93–116 MPa and 3.7–4.7 GPa, respectively.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2024
·
IF 1.3
Aiping Wang,Aihua Zhou,Jing Sui
In this work, an electrochemical sensor for simultaneous detection of hydroquinone (HQ) and catechol (CC) has been developed based on nanocomposite of Au nanoparticles (AuNPs) decorated poly(3,4-ethylenedioxythiophene) (PEDOT) nano-horns. AuNPs-PEDOT nanocomposite with a novel porous structure formed by lots of interconnected horn-like PEDOT has been facially prepared via a one-pot interfacial polymerization. The top and root-end diameters of horn-like PEDOT are around10 nm and 100 nm, respectively, while AuNPs with diameter ranging from 3 to 10 nm are evenly dispersed on PEDOT. The as-synthesized AuNPs-PEDOT nanocomposite modified glassy carbon electrode (GCE) exhibits high electrocatalytic property and excellent selectivity towards the redox reaction of HQ and CC. The AuNPs-PEDOT/GCE can simultaneously detect HQ and CC with detection limits (S/N = 3) of 0.38 µM and 0.43 µM for HQ and CC respectively. Moreover, the modified electrode has excellent selectivity and is successfully applied to detect HQ and CC in real tap water sample with recovery of 95.2–104.1% and 96.2–105.6%, respectively.
研究领域:
分析化学
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纳米材料科学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2016
·
IF 2.822
Shiqiang Cui,Li Li,Yaping Ding,Jiangjiang Zhang
The Co 3 O 4 electro-catalysts with the mesoporous structure were prepared by the sacrificing template method. The chemical composition , structural and morphological characterizations of Co 3 O 4 were examined by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption (BET). The electrochemical properties of the meso-Co 3 O 4 were investigated by differential pulse voltammetry (DPV) and cyclic voltammetry (CV) for the simultaneous detection of hydroquinone (HQ) and catechol (CC) in the phosphate buffer media (PBS). Based on the meso-Co 3 O 4 modifier electrode, a sensitive electrochemical sensor for phenolic compounds was successfully fabricated. Under optimal conditions, the detection limits of HQ and CC were found to be 0.1 and 0.1 μΜ (S/N = 3), respectively. The outstanding catalytic capability of meso-Co 3 O 4 catalysts may be associated with their large surface area provided by mesoporous structure.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2015
·Vol. 140
·期 23
·7939-7947
·
IF 4.107
Yi Hong Huang,Jian Hua Chen,Li Jing Ling,Zhen Bo Su,Xue Sun,Shi Rong Hu,Wen Weng,Yang Huang,Wen Bing Wu,Ya San He
In the present study, carbon nanocages (CNCs) decorated with gold nanoparticles (AuNPs) with diameters of 2–5 nm were synthesized by simply mixing their solutions. The sizes of the AuNPs are small enough to diffuse into the inside of the CNCs by electrostatic incorporation and their morphologies were characterized by transmission electron microscopy, X-ray diffraction, energy dispersive spectrometry, Raman spectrometry and ultraviolet visible absorption spectra. The AuNPs@CNCs modified electrode was prepared for simultaneous highly sensitive determination of catechol (CC) and hydroquinone (HQ). This modified electrode demonstrated fantastic eletrochemical catalytic activities towards CC and HQ by cyclic voltammetry and differential pulse voltammetry. The calibration curves showed a linear response between the peak currents and the concentrations of CC and HQ. A wide dynamic detection range of 1.0–250.0 μM and 0.1–200.0 μM with a low detection limits (S/N = 3) of 0.0986 μM and 0.0254 μM can be obtained for CC and HQ respectively. The present method was successfully employed for determination of CC and HQ in a practical sample.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Haiguan Yang,Junqi Zha,Peng Zhang,Yuemei Qin,Tao Chen,Fanggui Ye
A simple method was proposed for the preparation of CeVO 4 . The as-synthesized CeVO 4 was, for the first time, demonstrated to exhibit both peroxidase-like and oxidase-like activity, which catalyzes the oxidation of 3, 3′, 5, 5′-tetramethylbenzidine (TMB) to form a typical blue solution in the presence or absence of H 2 O 2 . Moreover, the mechanism of its dual-enzyme activity was investigated in detail. The Michaelis constant ( K m ) value for CeVO 4 (0.136 mM) was lower than that of horseradish peroxidase (0.424 mM) with TMB as the substrate. Interestingly, hydroquinone (H 2 Q), dihydroxybenzene isomer, undergoes reduction accompanying the oxidation of TMB by the CeVO 4 oxidase mimic along with a visible color change, while the other two dihydroxybenzene isomers, i.e., resorcinol (RC) and catechol (CC), do not. Based on these findings, a colorimetric platform was developed to discriminate H 2 Q from RC and CC. Under optimal conditions, a linear relationship between the H 2 Q concentration and absorbance was observed from 0.05 to 8 μM, and a limit of detection of 0.04 μM was achieved. Moreover, this colorimetric platform can selectively reveal H 2 Q concentrations in the presence of other dihydroxybenzene isomers.
研究领域:
生物化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
·
2020
·Vol. 31
·期 1
·25-32
·
IF 1.399
Meiqin,Zhu Jingjing,Fan Rongrong,Wang Yujie,Lv Zhaojun,Han Yongming,Peng Jun,Zheng Xinyu,Lin Ruiyu
High specific surface area activated carbon prepared by Perilla frutescens (PFHSAAC) was modified on the surface of the glassy carbon electrode (GCE) by drop-coating method to construct a PFHSAAC/GCE. The electrochemical properties of the modified electrode were investigated in detail by some electrochemical methods such as cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). Experiment results show that the modified electrode has excellent redox activity and distinction capability toward the two isomers of catechol (CC) and hydroquinone (HQ). The separation of oxidation peak potential for HQ and CC of DPV is 112.8 mV. Under the optimal conditions, the oxidation peak currents of HQ and CC show good linear relationships with their concentrations in the ranges of 1.0 × 10-6-2.0 × 10-4 and 1.0 × 10-6-1.5 × 10-4 mol L-1, respectively. The limits of detection for HQ and CC are 3.57 × 10-7 and 4.23 × 10-7 mol L-1, respectively. The PFHSAAC/GCE exhibits good stability, repeatability and sensitivity. The developed method was used to determine HQ and CC in water samples with best results.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Xinyu Zheng,Yingcai Hu,Huizi Li,Bolun Han,Ruiyu Lin,Biao Huang
Metal-organic frameworks (MOFs) of type ZIF-67 via simple heat- treatment process was employed to prepare N-doped carbon nanotube frameworks (NCNTFs). Whereafter, an electroanalysis method using NCNTFs as the modify material was constructed for selective sensing of hydroquinone (HQ) and catechol (CC). Both HQ and CC can be independently determined in mixed solutions. The anodic peak currents of HQ increase linearly in two concentration ranges, one from 0.8 to 100 and another from 100 to 200 μM. Also, the anodic peak currents for CC increase linearly in the concentration ranges of 0.8–40 μM and 40–120 μM. The detection limits are 0.17 μM and 0.12 μM for HQ and CC, respectively. The sensor was used to detect these two isomers in spiked lake water, and recoveries for HQ and CC are 91.6–95.0% and 95.3–105.0%, respectively.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Chao Hu,Haiping Huang,Han Sun,Yu Yan,Fang Xu,Jinsheng Liao
Dual-template molecularly imprinted polymer/carbon nanotubes/grassy carbon electrode (MIP/CNTs/GCE) was constructed by electropolymerizing a layer of bimolecular imprinted film with melamine (Mel) as functional monomer , hydroquinone (HQ) and catechol (CC) as template molecules on CNTs modified GCE. The morphology, structure and electrochemical properties of MIP/CNTs/GCE were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy and electrochemical technology, respectively. The experimental parameters for the construction of sensor were optimized in detail, which includes the reagent molar ratio, the electropolymerization cycles, the elution time and the pH value of the electrolyte. Under the optimal conditions, the simultaneous detection of HQ and CC was realized via cyclic voltammetry (CV) and differential pulsed voltammetry (DPV). Compared with CNTs/GCE, molecularly imprinted membrane can significantly enhance its response current to HQ and CC. At the same time, both the linear range of HQ and CC measured by DPV are 10–100 μM, with the detection limits of 3.1 μM and 3.5 μM, respectively. The electrode also owned good reproducibility and stability. Finally, MIP/CNTs/GCE was successfully utilized for the detection of HQ and CC in river water.
研究领域:
分析化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Liangkun Hou,Yingying Liu,Kejing Wu,Yingming Zhu,Houfang Lu,Bin Liang
The acid-catalyzed desorption of the MDEA CO2-rich liquid under the electrochemical reaction can lower the desorption temperature, thereby reducing the energy consumption for regeneration. In this work, disodium 4,5-dihydroxy-1,3-benzenedisulfonate (tiron) was used as an acidic medium for the electrocatalytic regeneration of the MDEA CO2-rich solution. The results show that the CO2 desorption efficiency reaches more than 90% at 25 °C for the 0.3 M MDEA (0.1 M tiron) system. At 50 °C, compared with 3 M MDEA (without tiron), the maximum CO2 desorption rate and desorption efficiency of the 3 M MDEA (with 0.1 M tiron) CO2-rich solution increased by 27.4 and 18.3%, respectively. Elevating the temperature can increase the quantity of CO2 desorption and the degree of MDEAH+ deprotonation as well as the reactivity of tiron on the electrode, so the desorption rate of CO2 can be further improved by the oxidation of tiron releasing H+ in coordination with thermal desorption.
研究领域:
化学工程
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Weifeng Xu,Xiang Liu,Kewen Tang
A novel bi-functional β-cyclodextrin polymer (CD@TCT@PEI) was synthesized for the removal of hydroquinone and Pb(II) from wastewater. The structure and adsorption performance of CD@TCT@PEI towards hydroquinone and Pb(II) were studied comprehensively. Both of the adsorption processes fit the pseudo-second-order kinetic model well. The adsorption isotherms of hydroquinone and Pb(II) could be described well by Langmuir isotherm model, and the maximum adsorption capacities of hydroquinone and Pb(II) are 364.86 and 113.52 mg g −1 , respectively. The adsorption of hydroquinone and Pb(II) on CD@TCT@PEI is an exothermic and spontaneous process. The adsorbed CD@TCT@PEI could be regenerated easily, and can still maintain high adsorption performance after 5 cycles. The electrostatic interaction and coordination interaction account for the adsorption of Pb(II), and inclusion of cyclodextrin and hydrogen-bond interaction are responsible for hydroquinone adsorption. This study provides some insights to design an adsorbent that can simultaneously remove heavy metal ions and organic micropollutants from wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 8
·1545-1557
·
IF 4.3
Ding Minling,Niu Huizhe,Guan Ping,Hu Xiaoling
A sensitive and selective molecularly imprinted polymer (MIP) sensor was developed for the determination of amyloid-β (1–42) (Aβ 42 ). The glassy carbon electrode (GCE) was successively modified with electrochemical reduction graphene oxide (ERG) and poly(thionine-methylene blue) (PTH-MB). The MIPs were synthesized by electropolymerization with Aβ 42 as a template and o-phenylenediamine (o–PD) and hydroquinone (HQ) as functional monomers. Cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), chronoamperometry (CC), and differential pulse voltammetry (DPV) were used to study the preparation process of the MIP sensor. The preparation conditions of the sensor were investigated in detail. In optimal experimental conditions, the response current of the sensor was linear in the range of 0.12–10 μg mL −1 with a detection limit of 0.018 ng mL −1 . The MIP-based sensor successfully detected Aβ 42 in commercial fetal bovine serum (cFBS) and artificial cerebrospinal fluid (aCSF).
研究领域:
分析化学
·
电化学
·
生物传感器
·
神经退行性疾病
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）