ANALYST
·
2018
·Vol. 143
·期 23
·5812-5821
·
IF 3.864
Xiaohua Pan,Yan Zhang,Xiaobo Sun,Wei Pan,Jinping Wang
Since different quenching mechanisms can endow carbon dots (CDs) with diverse responsive manners, multi-mode sensing can in principle be achieved by a single carbon-dot-based sensor. In this work, green emissive CDs were prepared by simple hydrothermal pyrolysis of phenolphthalein and ethylenediamine at 180 °C for 5 h, with a quantum yield of 17%. The as-prepared CDs can be selectively quenched by Hg2+ due to their specific binding affinity causing photo-induced electron transfer (PET). Due to the inner filter effect (IFE), the CDs also showed intensive fluorescent response to lemon yellow dye. Moreover, the CDs responded to Fe2+ or H2O2 selectively in the presence of H2O2 or Fe2+ owing to oxidative quenching (OQ) by hydroxyl radicals resulting from the Fenton reaction. Via the diverse responsive manners of PET, IFE and OQ, multi-mode sensing for Hg2+, lemon yellow and Fe2+, H2O2 was thus achieved by a single green emissive carbon-dot-based sensor. Accordingly, the linear ranges for the selective detection of Hg2+, lemon yellow, Fe2+ and H2O2 were found to be 0.0–500.0, 0.0–20.0, 0.0–90.0 and 0.0–50.0 μM, with the limits of detection as low as 5.8, 0.5, 1.2 and 1.1 μM, respectively.
研究领域:
分析化学
·
材料科学
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DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 38
·15351-15358
·
IF 3.069
Huixiao Duo,Hao Tang,Jianlong Ma,Xiaofeng Lu,Licheng Wang,Xiaojing Liang
A metal organic framework (MOF-235) was fabricated by a simple solvothermal method and utilized as an adsorbent for the selective removal of electron-rich conjugated dyes. Parameters that influenced the adsorption process were investigated and the excellent adsorption properties of MOF-235 toward Congo red (CR) and lemon yellow (LY) are also exhibited in a wide range of pH 3–9. Moreover, the adsorption kinetics and thermodynamics were determined, indicating that the Langmuir model can well describe the adsorption isotherm and the pseudo-second order model can satisfactorily describe the adsorption kinetics. Thanks to the large hydrophobic effect between electron-deficient MOF and electron-rich conjugated dye molecules, the ultrahigh maximum adsorption capacity for CR and LY calculated by the Langmuir model is up to 1250 and 250 mg g−1, respectively, which surpass that of most reported adsorbents. Notably, the maximum adsorption capacity of adsorption of CR and LY is up to 1131 and 209 mg g−1 in fruit juice, respectively. Additionally, the synthesized MOF-235 has a high adsorptive selectivity and fast adsorption rate and can be regenerated for removal by washing with ethanol containing NaOH solution. These results demonstrated that MOF-235 would be an effective and easily reusable adsorbent for the adsorptive removal of CR and LY from fruit juice.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Food Analytical Methods
·
2016
·Vol. 10
·期 1
·200-209
·
IF 2.167
Yu Lanlan,Zheng Huijun,Shi Mengxing,Jing Shasha,Qu Lingbo
A new and sensitive electrochemical sensor for simultaneous determination of sunset yellow and tartrazine was constructed by poly (diallyldimethylammonium chloride) (PDDA)-dispersed graphene (Gr) and palladium nanoparticle (Pd NP) composite. The PDDA-Gr-Pd composite displayed good selectivity and high sensitivity to the targets, which were ascribed to the synergistic effect of the large surface area and good electron transfer efficiency of both Gr and Pd NPs. The electrochemical properties of sunset yellow and tartrazine on the modified electrode were investigated by cyclic voltammetry and differential pulse voltammetry. Under the optimum experimental conditions, the peak currents were linear with the concentrations of sunset yellow and tartrazine in the ranges of 0.01–10.0 and 0.05–8.0 μmol L −1 , respectively. The limit of detection (LOD) was 2.0 and 5.0 nmol L −1 for sunset yellow and tartrazine, respectively. The developed simple and sensitive method was successfully applied for simultaneous determination of sunset yellow and tartrazine in soft drinks with satisfactory results.
研究领域:
生物医学工程
·
分析化学
·
食品安全检测
·
纳米材料应用
·
电化学分析
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DOI
高影响因子
Silicon
·
2019
·Vol. 12
·期 3
·585-594
·
IF 1.21
Wang Qikun,Wang Yongqing,Chang Qibing,Liu Han,Yang Yulong,Zhang Xiaozhen
To obtain the ultrafine pigment for ink-jet printing, ultrafine spherical Pr-ZrSiO 4 pigment was prepared by sol-gel-microemulsion method (S-G-M). In the emulsion, ZrO 2 and SiO 2 sols are used as water phase, cyclohexane serves as oil phase, Triton X-100 and 1-hexanol are chosen as surfactant and co-surfactant, respectively. The results show that without the introduction of demulsifier, the sol/oil microemulsion system is demulsified automatically due to the transformation of liquid/liquid to solid/liquid interface following the transformation from sol to gel. The obtained Pr-ZrSiO 4 pigment owns uniform spherical particles with the average particle size of about 0.785 μm, which is suitable for the ink-jet printing. The CIE coordination of the pigment is L* = 87.63, a* = −3.82, b* = 65.68, which shows bright lemon yellow. Hence, the ultrafine pigment in this work has the good application prospects.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yining Chang,XiaoMeng Zhong,Yanli Wei,Li Wang
Lemon yellow (LY) is an azo dye which is widely used as food colorant. The continuous consumption can result in the safety concerns for both human and environmental health. This study describes a new sulphur quantum dot (SQD) based fluorescent sensor, which was facilely prepared with oxidized-glutathione (GSSG) as passivator at mild condition of 75 °C. The obtained sulphur quantum dots (GSSG-SQDs) have a relative quantum yield of 0.25, which is 2–5 times that of most SQDs. GSSG-SQDs were used as a sensor for lemon yellow in the concentration range of 0.10–70 μM and the limit of detection of 60 nM. The application was verified with the real sensing of lemon yellow in the soft drinking and tap water, having the standard recovery from 92.5 % to 105 %. Given the great luminescence and photostability, GSSG-SQDs were used as a filler for the preparation of luminescent films and hydrogels as a promising material for a wide range of applications such as information encryption and bioengineering.
研究领域:
分析化学
·
材料科学
·
环境科学
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Lei Cheng,Rong Huang,Qiang Cao,Na Liu,Peiyi Li,Mengmeng Sun,Haiyang Qin,Lidong Wu
Azo pigments with azo functional groups (–N N–) are commonly used in foods. Through rational design, here we report synthesis of a novel magnetic metal–organic framework (MOF-545) and the use of Fe 3 O 4 @MOF-545 for the selective separation of azo pigments from beverages. We find that Fe 3 O 4 @MOF-545 exhibits excellent adsorption/removal capacities for new coccine (NC, 459 mg g −1 ) and lemon yellow (LY, 476 mg g −1 ) individually. The results indicated that the adsorption capacities of Fe 3 O 4 @MOF-545 were 5 times higher than reported previously. The large surface area (120.4 m 2 /g) and the suitable pore size (1.6 nm) of Fe 3 O 4 @MOF-545 provided multiple accessible channels for azo pigment adsorption. The adsorption kinetics, stability, recovery, and reusability of Fe 3 O 4 @MOF-545 were all reported. The recoveries ranged from 92.9 to 104.5%, reflecting the capacity of MOF-545 to efficiently separate NC and LY. Fe 3 O 4 @MOF-545 is suitable for azo pigment determination and separation in food matrices.
研究领域:
材料科学
·
分析化学
·
食品科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xiaoting Guo,Jinping Song,Jianhua Xue,Qi Ma
Sunset Yellow (SY), a widely used food additive, poses health risks when consumed in excess. Therefore, it is necessary to develop method for the detection of SY in different foodstuffs. In this study, we synthesized concentration-tunable nitrogen and bromine co-doped functional carbon quantum dots (CQDs) through a simple solvothermal method utilizing Tetrabromophthalic anhydride and Ethylenediamine. The synthesized CQDs were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV–Vis absorption spectra and fluorescence spectrophotometer. Notably, the CQDs exhibited a high fluorescence quantum yield of 25.85 %, and their fluorescence was effectively quenched by SY, thus enabling the development of a fluorescent probe for SY detection. Consequently, a novel fluorescent probe was established with a linear range of 0.03–100 μmol/L and a limit of detection (LOD) of 0.01 μmol/L. This probe was validated for SY quantification in various food samples, achieving recovery rates between 98.27 % and 108.67 %, with a relative standard deviation (RSD) of less than 3.76 %, indicating promising application prospects.
研究领域:
分析化学
·
纳米材料
·
食品安全
·
荧光传感
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Dandan Ren,Jiale Xie,Feng Ding,Yu Wang,Xingchu Gong
The pharmaceutical industry is gradually transitioning from batch production to continuous manufacturing. This study aims to continuously manufacture an herbal product of sinomenine hydrochloride crystals. A continuous manufacturing device was set up using a micro phase separator, T-shaped micromixers, and online spectrometers to achieve the continuous process of washing, phase separation, and acid crystallization. Continuous phase separation of anisole phase and aqueous phase was achieved by a homemade membrane phase separator. Near-infrared (NIR) spectrometer was used to collect data and establish quantitative models of the contents of sinomenine and water, with model R 2 values higher than 0.8. The residence time distribution of sinomenine in both partial and overall processes was measured by the pulse method. Based on two online monitoring devices, UV detector and NIR spectrometer, a series of process control strategies including online monitoring, real time release testing, disturbance management and diversion strategy were developed to ensure the state of control. The average purity of sinomenine hydrochloride crystals prepared with continuous manufacturing was about 90.8 %, which showed no significant difference compared with those prepared with batch manufacturing. The green degree of the continuous manufacturing process reached 104 points due to the improvements in production efficiency and the ability to use real-time analysis to prevent accidents. The process monitoring method and control strategy for continuous manufacturing processes can also be used for other herbal product manufacturing.
研究领域:
制药工程
·
过程系统工程
·
绿色化学
·
连续制造
·
分析化学
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Qianchun Zhang,Xiaofang Tian,Meijie Xie,Xinyu Luo,Boyan Zheng,Xiangming Luo,Mei Wang,Shan Mou,Yun Wu
In this study, we report the synthesis of silver-doped yellow-green fluorescent carbon dots (Ag-YGCDs) using a facile solvothermal method with L-citrulline, phthalamide, and silver nitrate as precursors. The Ag-YGCDs exhibited a maximum emission at 530 nm when excited at 450 nm, with a fluorescence quantum yield of 5.9 %. Paramountly, the Ag-YGCDs exhibited exceptional fluorescence quenching performance with high sensitivity and selectivity towards tartrazine, enabling a novel fluorescent probe for trace tartrazine detection. A wide linear response range spanning 0.10–45 μM was exhibited by the probe for tartrazine quantification, while maintaining a detection limit as low as 27 nM. The constructed method was then successfully applied in various food matrices, including cocktails, juices, energy drinks, hard candies, gummy candies, and chocolate confectioneries. The recovery rates ranged from 91.4 % to 120 %, with relative standard deviations between 1.1 % and 3.7 %, confirming the method's reliability and accuracy.
研究领域:
分析化学
·
食品科学与技术
·
纳米材料
·
荧光传感
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shengmiao Wang,Yang Song,Yupu Yang,Xiaohong Wang,Jing Lan,Zheqin Dong
Gelatin-based hydrogels are promising for bone tissue engineering due to their inherent biocompatibility and bioactivity, yet developing scaffolds that simultaneously achieve mechanical robustness, osteoinductivity, and structural precision remains a major challenge. Here, we report a high-strength GelMA-PVI-Zn hydrogel constructed through a double-crosslinked (DC) network of gelatin methacryloyl (GelMA), poly(1-vinylimidazole) (PVI), and Zinc ions. Dynamic PVI-Zn coordination bonds act as sacrificial interactions to dissipate energy, endowing the hydrogel with exceptional mechanical performance, including a tensile modulus of 11.72 ± 0.33 MPa (81.8-fold higher than single-network controls) and a fracture strength of 2.50 ± 0.12 MPa (44.0-fold increase). Importantly, the coordination network preserves the rapid photocrosslinking kinetics of GelMA, ensuring compatibility with digital light processing (DLP) 3D printing for the fabrication of complex, high-fidelity scaffolds. Moreover, sustained Zn 2+ release from the network promoted stem cell osteogenic differentiation in vitro and markedly enhanced bone regeneration in vivo. This work presents a robust and versatile hydrogel platform that integrates high mechanical strength, osteoinductivity, and printability, offering strong translational potential for the treatment of critical-sized bone defects.
研究领域:
生物材料
·
组织工程
·
生物医学工程
·
再生医学
·
3D打印
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产品关联
DOI
PubMed
高影响因子
SYNTHETIC METALS
·
2026
·
IF 4.6
Shuang Luo,Feiyang Shen,Junyao Li,Wenrong Cai,Yong Kong
A molecularly imprinted electrochemical sensor is facilely designed for the detection of eugenol (EU). Copper nanoparticles (CuNPs) are first electrodeposited on the surface of a glassy carbon electrode (GCE) and act as the built-in probe. By using EU as the template molecules, o -phenylenediamine (o-PD) monomers are electropolymerized on the surface of the CuNPs/GCE. After the removal of the EU template molecules with the ethanol/water mixture, the molecularly imprinted electrochemical sensor is obtained. According to the cathodic peak currents ( I pc ) of copper oxide generated from the oxidation of the CuNPs probe on the differential pulse voltammograms (DPVs), sensitive detection of EU can be achieved. The EU sensor shows a wide linear concentration range from 0.05 to 100 μM with a low limit of detection (LOD) of 0.022 μM under the optimized conditions. Additionally, the EU sensor exhibits excellent specificity, repeatability, reproducibility and stability. Finally, the developed EU sensor is used for the detection of EU in real samples, and reliable results are obtained.
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产品关联
DOI
高影响因子
Journal of Field Robotics
·
2026
·
IF 5.1
Chao Wang,Yixian Wang,Zonggang Li,Xiaolong Wang,Desheng Liu,Huifeng Kang,Yanhui Wang
For underwater tasks that require an efficient approach over long distances and stable adhesion for close-range crawling, this paper proposes a propeller–leg hybrid underwater adhesion robot with integrated swimming and crawling capabilities. First, we present the overall design of a robot that integrates a bionic leg–foot mechanism and a propeller propulsion system. Second, we design a hydrogel biomimetic sucker with reversible adhesion and detachment, accompanied by an adhesion performance test. A dual-criterion system for static stability margin and adhesion force reliability was proposed during the robot crawling stage. On the basis of computational fluid dynamics simulation results, a critical instability model was developed to quantify the effects of flow velocity, slope, and load on system stability. We have developed a crawling–swimming collaborative control strategy to address the mode-switching issue during locomotion. This strategy employs a hierarchical control architecture guided by stability criteria, in which central pattern generator–based rhythmic control dynamically integrates with sliding-mode propulsion compensation via switching signals. The experimental results show that the proposed robot can achieve stable attachment motion through propeller–leg coordination under special working conditions (inverted surfaces and slopes). The proposed robot provides a multimodal solution for underwater operations that require a rapid target approach in open water, followed by stable attachment and adhesive crawling on structural surfaces.
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产品关联
DOI
高影响因子
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