JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2014
·
IF 2.871
Yunqiao Gao,Meiling Wang,Xiongbo Yang,Qian Sun,Jianwei Zhao
A novel modified electrode based on polypyrrole (ppy) and single-walled carbon nanotubes (swcnts) was developed for the detection of quinoline yellow. It is prepared via a simple and convenient method. Cyclic voltammetry (CV) and square wave voltammetry (SWV) were used to confirm the successful stepwise assembly procedure of the sensor. Under the optimal conditions, the fabricated electrode exhibits excellent electrochemical activity toward the oxidation of quinoline yellow. The liner range is from 0.8 to 100 μM, and the detection limit is down to 0.08 μM. The modified electrode also showed good accuracy, stability and reproducibility, which might be attributed to particular properties of polypyrrole, single-walled carbon nanotubes and synergic interaction between them.
研究领域:
分析化学
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材料科学
·
食品科学
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DOI
高影响因子
JOURNAL OF FLUORESCENCE
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2024
·
IF 2.6
Ge Ziyang,Du Haiying,Tang Bo,Deng Jie
Carbon quantum dots (CQDs) were greenly synthesized via a single-step hydrothermal method, using the trunks of Bauhinia purpurea as the carbon source. They exhibited good dispersibility, water solubility, high sensitivity, and great stability with a spherical form and a particle size of 2.68 ± 0.32 nm. By utilizing the inner filter effect and dynamic quenching effect, the fluorescence quenching of CQDs can be induced to detect quinoline yellow. Detailed experimental results showed that the change rate of fluorescence intensity of CQDs had a good linear relationship with varying concentrations of quinoline yellow (2–128 µmol/L). It can be clearly observed that the fluorescence quenching occurred within 1 min, its correlation coefficient (R 2 ) is 0.9912, and the detection limit (DL) is 1.7884 μmol/L, substantially lower than the maximum concentration stipulated by the national standard of 209.5 µmol/L. Furthermore, quinoline yellow had been successfully detected in real beverage samples using CQDs, with the recovery rates of 90.6%-110.4% and the relative standard deviation (RSD) ≤ 6.3% and it also showed great anti-interference and selectivity. These findings indicate that the detected quinoline yellow of CQDs possess substantial promise for a wide range of applications within the detected artificial food colors field. Graphical Abstract
研究领域:
食品科学
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材料科学
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分析化学
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DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2024
·
IF 4.3
Jianghua Wang,Zhilin Zhou,Qing Li,Tong Zhang,Yingqiang Fu
Quinoline yellow (QY), as a food coloring agent, will consume a large number of detoxifying substances in the body after being ingested by the human body, interfering with the normal metabolic functions of the human body, and may cause allergies, diarrhea and other symptoms, as well as a certain degree of carcinogenicity, posing a great threat to human health. As a result, it is critical to develop a fast, sensitive, and effective approach to determining quinoline yellow in food. In this study, carbon dots (N-CQDs) with high fluorescence quantum yield were prepared and used to determine the QY content using the dual mode of internal filtering effect and fluorescence emission shift detection. Both methods showed good linearity in the range of QY concentration of 0.3–3.2 μM, and the detection limits were classified as 2.6 nM and 0.18 μM. In addition, in order to achieve visual detection of QY, fluorescent test strips were constructed using the carbon dots and non-fluorescent qualitative filter paper to make the detection of QY more convenient. This probe presents a novel way for detecting quinoline yellow in food analysis.
研究领域:
分析化学
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食品安全
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生物医学
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DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Chen Liang,Ang Chu,Zhe Lu,Shiwei Feng,Fukang Liu,Jingjing Cui,Yunlong Guo,Weizi Gao,Biao Zhang
Photocuring-based three-dimensional (3D) printed hydrogels have versatile applications in various fields. However, the heterogeneous network with nanogel cross-linking points during free radical polymerization (FRP) often results in hydrogels that are unable to degrade or be reprocessed, significantly limiting their applications. Herein, a UV-curable reversible addition–fragmentation chain transfer (RAFT)-mediated hydrogel system compatible with digital light processing (DLP) 3D printing is reported, enabling the fabrication of complex hydrogel structures with rapid, controlled degradation and self-degradation capabilities at ambient temperature. The enhanced degradability stems from the synergistic combination of the hydrolyzable bonds and RAFT chemistry. The hydrogel precursors exhibit optimal rheological properties, while the mechanical properties of the resulting hydrogels are precisely tunable by adjusting the cross-linker content and water content. Degradation kinetics can be systematically controlled by adjusting the cross-linker content, water content, and the treatment temperature. Hydrogels containing 50 wt % water content demonstrate complete degradation into molecular chain segments and/or molecules within 6 h at 37 °C. Furthermore, the 3D printed RAFT-mediated hydrogels can self-degrade at ambient temperature. After self-degradation, the resulting solution exhibits the unsaturated acrylic functional molecules with the characteristic of high viscosity, which can be directly used for UV-assisted direct ink writing (DIW) to refabricate new 3D hydrogel structures.
研究领域:
材料科学
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高分子化学
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生物医学工程
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增材制造
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大分子化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Jingjing Bai,Fukang Liu,Jingjing Cui,Yibo Hong,Mingzheng Hao,Bingxiao Liu,Yanyan Lv,Yan Zhai,Weijie Ren,Zhenxing Qin,Biao Zhang
Digital light processing (DLP)-based 4D printing of hydrogels has been widely applied in various fields. However, the poor mechanical properties of conventional hydrogels limit their recovery force during swollen-induced shape memory and recovery processes, restricting their propulsive performance and further applications. In this work, we develop a 4D printable PF127-diacrylate (PF127-DA) micelle-enhanced hydrogel system. The UV-polymerized PF127-DA micelle-enhanced single-network hydrogels exhibit exceptional mechanical properties, including an elongation at break of 2350 % and a toughness of 3.63 MJ/m 3 . Also, the UV-triggered polymerization enables compatibility with DLP-based 3D printing, facilitating the fabrication of high-resolution, complex 3D hydrogel structures. Inspired by the elastic actuation mechanism of jumping animals, the hydrogel is pre-deformed and immersed in an Fe 3+ solution, enabling coordination between Fe 3+ and COO − groups in the hydrogel to build the second crosslinking network. This network fixes the hydrogel in the pre-deformed state, achieving a shape memory effect. The results demonstrate that the hydrogel achieves effective shape fixation under large deformations (500 % pre-deformation with a shape fixation rate of 80 %). Then, the coordination network can then be dissociated through acid or UV light stimulation, triggering shape recovery with a recovery rate exceeding 90 % within 15 min under 1 mol/L acid conditions. Additionally, the designed shape memory measurement yields a maximum recovery stress of approximately 30 kPa. By using this strategy, we achieve 4D-printed hydrogels with large deformability, high recovery force, and programmable shape transformations, showcasing their potential for advanced actuation devices.
研究领域:
生物材料
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高分子科学
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智能材料
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增材制造
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2023
·
IF 15.1
Chen Liang,Jingjing Cui,Yongding Sun,Zhe Lu,Fukang Liu,Shiwei Feng,Guang Hu,Jin Cui,Biao Zhang
Digital light processing (DLP)-based 3D printing of hydrogels with sophisticated structures has been widely used in myriads of fields. However, the inherent covalently crosslinked network of hydrogels limits their further applications, such as working as sacrificial molds. In this work, a photocurable hydrogel system with labile covalent bonds suitable for DLP based printing to fabricate 3D complex hydrogel structures with fast- and controlled degradation ability is reported. The hydrogel precursor is composed of polyethylene glycol 400 (PEG400), a water soluble photoinitiator, and PEGDA575-Do, a degradable photocurable diacrylate monomer that can be degraded in aqueous condition via reversable aza-Michael addition reaction. The mechanical properties of formed hydrogels can be regulated by changing the PEG content and water content, and the degradation rate can be regulated by changing parameters such as PEG400 content, water content and the treating temperature. Moreover, the DLP printed degradable hydrogels networks can be used as sacrificial molds to fabricate structures from materials that cannot be directly used for DLP 3D printing (e.g. thermoplastic polycaprolactone (PCL), epoxy-based resin, and chocolate). As proofs-of-concept, a microfluidic chip is fabricated by using the biocompatible 3D printed hydrogel as a sacrificial template. Similarly, a flexible RFID tag and a flexible self-powered device are also prepared, demonstrating the potential applications in the field of flexible electronics.
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高影响因子
ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Junhong Li,Danhua Zhu,Hui Huang,Shuqian Xie,Jingkun Xu,Ruirui Yue,Xuemin Duan
Herein, the electrochemical sensing platform has been proposed based on metal-organic framework doped Au/poly(3,4-ethylenedioxythiophene) (PEDOT) composites to simultaneously detect the catechin and sunset yellow in tea beverage. The characterization reveals that the Au nanoparticles distribute well on/in conducting PEDOT, and the relatively few UIO-66 particles as the dopant intersperse the Au/PEDOT composites. The electrochemical test has been used to study the sensing properties toward catechin and sunset yellow simultaneous detection. The results show that the Au/PEDOT/MWCNT-CONH-UIO-66 performs a wide range of 0.03∼60 µM and 0.3∼40 µM, low detection limit as 0.01 μM / 0.15 μM towards catechin and sunset yellow simultaneous detection, respectively. Furthermore, the Au/PEDOT/MWCNT-CONH-UIO-66 possesses a wide linear detection range and high sensitivity for catechin and sunset yellow detection. Moreover, the Au/PEDOT/MWCNT-CONH-UIO-66 composite also has great stability and anti-interference ability. Finally, the sensing platform was applied to detect catechin and sunset yellow in the tea beverage compared with the high-performance liquid chromatography method. To the best of our knowledge, our work first reported the electrochemical sensing materials for catechin and sunset yellow simultaneous detection in food, which will provide a certain theoretical analysis and experimental experience for the preparation of materials used for catechin and sunset yellow simultaneous detection in food.
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高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 27
·13359-13372
·
IF 9.931
Yuanting Xu,Dandan Yuan,Jianxu Bao,Yi Xie,Min He,Zhengqiang Shi,Shengqiu Chen,Chao He,Weifeng Zhao,Changsheng Zhao
The development of highly efficient adsorbents with a fast adsorption rate and high adsorption capacity presents an enticing prospect for wastewater remediation. In this paper, a novel ultrafast adsorption nanofibrous membrane (UFAM) for organic dyes was prepared through a simple functional group surface migration method. An amphiphilic copolymer of methyl methacrylate and sodium styrene sulfonate was synthesized in a mass ratio of 3 : 2 by free radical polymerization and further blended into polyethersulfone (PES) to prepare functionalized PES nanofibrous membranes by electrospinning technology. Just by soaking in water and lyophilization, the hydrophilic and negatively charged sulfonate groups migrated and concentrated on the membrane surface, and the obtained UFAM was found to be exceptionally efficient in the removal of methylene blue (MB) dye from aqueous solution. Especially, an ultrafast adsorption rate for MB with an adsorption equilibrium time of within 5 min was reported for the first time. The mechanism of the ultrafast adsorption based on the sulfonate group migration and enrichment was also especially explored in this study. In addition, the UFAM also showed excellent performance of recyclability, dynamic filtration–purification, selective adsorption for cationic dyes from mixed dye solutions and smart filtration–separation for cationic and anionic dyes. Therefore, we envision that this study will not only provide a new strategy to construct low-cost and highly efficient adsorbents, but also demonstrate their potential applications in the removal of organic dyes on a large scale.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Ran Wei,Wanying Song,Fan Yang,Jukai Zhou,Man Zhang,Xiang Zhang,Weifeng Zhao,Changsheng Zhao
Solution pH is an important factor in the adsorptive behavior of ionizable dyes in the chemical and biotechnology industries. In this study, novel pH-responsive zwitterionic hydrogels were prepared by the copolymerization of acrylic acid and methylacryloyloxyethyl trimethylammonium chloride. The results indicated that the hydrogels showed bidirectionally pH-responsive behaviors: the swelling ratio was small in neutral pH value and increased with the increase or decrease of pH values. Meanwhile, the selective adsorption capacities of the hydrogels for anionic or cationic dyes could be controlled by adjusting the pH values. The hydrogels might be applied in many fields, such as adsorption and separation and water treatment.
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高影响因子
危险品化学品经营许可证（带存储）