JOURNAL OF SEPARATION SCIENCE
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2023
·Vol. 46
·期 6
·202200862
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IF 3.1
Jiana Lin,Xiaoyan Ouyang,Yuling Hu,Gongke Li,Qisheng Zhong
A highly chemically stable primary amide-functionalized cyclotricatechylene covalent organic framework was synthesized by an irreversible reaction and a post-synthetic modification. It possessed a rod-like morphology and exhibited strong solvent stability owing to the polyether bonds. The material showed good adsorption performance for melamine and its derivatives and adsorption mechanism was investigated by molecular simulations. The adsorbent was coated on the nylon-66 membrane to prepare the enrichment membrane. Under optimized conditions, an in-syringe membrane-based extraction method, combined with ultra-high performance liquid chromatography-tandem mass spectrometry was developed for the analysis of melamine and six melamine derivatives in the migration solution. A good linearity was obtained with correlation coefficients ranging from 0.9924 to 0.9995. The limits of detection were 1–200 ng/L and the limits of quantification were 3–500 ng/L. This method was successfully applied to the migration solution of sushi bamboo rolling mats with spiked recoveries of 73.2%–115% and relative standard deviations of 0.9%–9.9%. This work shows a practical and perspective approach for the efficient enrichment of food contact material hazards.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2022
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IF 10.319
Ziling Cheng,Guojun Chang,Bai Xue,Lan Xie,Qiang Zheng
Along with the integrated and miniaturized development of advanced electronic devices, phase change materials (PCMs) simultaneously with efficient thermal management and high electromagnetic interference (EMI) shielding effectiveness (SE) are ungently demanded. Herein, the shape-stabilized MXene/Ni-platted melamine sponge/Regenerated cellulose/Graphene nanoplate/Polyethylene glycol (MX/Ni@MS/RCG/PEG) composite PCMs comprising hierarchical Ni@MS/RCG and MXene film were fabricated via a facile encapsulation approach. Hierarchical Ni@MS/RCG hybrid aerogel was prepared by electroless plating and sol-gel methods, and MXene film was obtained using vacuum-assisted filtration procedure. The synergistic effect of conductive Ni@MS/RCG networks and tight MXene film endows MX/Ni@MS/RCG/PEG composite PCMs with good shape stability, high cyclic reliability, large latent heat of phase change (154.3 J g –1 ), excellent thermal conductivity (TC, 0.47 W m –1 K –1 ) and favorable EMI shielding performance (32.7 dB). The TC of acceptable 0.47 W m –1 K –1 is observed for MX/Ni@MS/RCG-5/PEG at a rather low GNP content of merely 0.39 wt%. In addition, the temperature variation of MX/Ni@MS/RCG-5/PEG is a lot faster than that of pure PEG in the heating/cooling process, revealing the remarkable energy storage and release efficiency for the composite PCMs. This investigation has taken an important step towards shape-stabilized composite PCMs with both effective thermal management and high EMI SE for promising applications in electronic packaging and advanced energy.
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APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Lingxiao Lu,Lanxin Xu,Yongling Zhang,Tao Jiang
Owing to its ultranarrow spectral line width, surface-enhanced Raman scattering (SERS) as a specific fingerprint identification technology has exhibited its distinctive talent in the multiplexed assay of illegal food additives. Herein, a three-dimensional (3D) hybrid SERS substrate was constructed by utilizing polystyrene (PS) nanospheres as template matrix, silver as active interlayer, and graphene oxide (GO) as coating surface to enable the effective monitoring of mixed melamine and dicyandiamide in dairy food without interference. Through amalgamating the significant electromagnetic effect triggered by the PS-mediated 3D architectures with the chemical enhancement and molecule-enrichment abilities of GO, the proposed substrate exhibited a highly sensitive detection characteristics with reliable reproducibility, facilitating a limit of detection low to 2.8 × 10 −8 M for 2-naphthalenethiol. After the further establishment of standard calibration lines, the feasibility of the proposed sensitive substrate in the multivariate monitoring of melamine and dicyandiamide was verified in milk as well as yogurt, achieving moderate recovery rates higher than 75%. This work proposed a facile strategy to construct 3D hybrid SERS substrate, which might show great promise to secure food security.
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ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Teng Chen,Zhiyu Liu,Kai Zhang,Bolin Su,Zhenhua Hu,Hongri Wan,Yan Chen,Xinkai Fu,Zhaojian Gao
A functional material integrated with a variety of functions is highly desired in wastewater treatment. In this research, a mussel-inspired method of immobilizing silver nanoparticles on the skeleton of a melamine sponge is proposed and applied for water remediation. Ag NPs were reduced in situ and grown on a polydopamine-modified melamine sponge. The catalytic reduction of 4-nitrophenol (4-NP) in the presence of the obtained MS-PDA-Ag was evaluated, and the results demonstrated that the MS-PDA-Ag presented high catalytic reduction activity. In addition, the monolithic MS-PDA-Ag presents excellent reusability with no remarkable decrease in catalytic efficiency after multiple reuses. Owing to the immobilized Ag NPs, the MS-PDA-Ag can also effectively inhibit the growth of bacteria against both gram-positive and gram-negative species, making it possible for bacteria elimination in polluted water. To further explore the possibility of utilizing the MS-PDA-Ag for versatile applications, a superhydrophobic derivative (S-MS-PDA-Ag) was prepared by coating a low-surface-energy substance (octadecanethiol) on the surface of MS-PDA-Ag. The obtained S-MS-PDA-Ag presents the capacities of oil/organics adsorption and water repellence, which can separate the insoluble oil/organics from water. The melamine sponge immobilized with Ag NPs demonstrates prominent catalytic reduction of 4-NP, antibacterial activity and the superhydrophobic derivative presents the capacity of insoluble oil/organics separation from oil–water mixtures, exhibiting high potential in the remediation of polluted water.
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JOURNAL OF CHROMATOGRAPHY A
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2021
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IF 4.759
Hua Shu,Guoning Chen,Lu Wang,Xia Cui,Zhimin Luo,Wanghui Jing,Chun Chang,Aiguo Zeng,Jia Zhang,Qiang Fu
Aristolochic acid Ⅰ is a nephrotoxic compound and exist in some traditional Chinese medicines at trace level. Up to now, specific enrichment of aristolochic acid Ⅰ remains important procedure and key problem in its analysis. In this study, melamine was proposed as the recognition unit and grafted on the surface of metal-organic framework to fabricate a specific material for aristolochic acid Ⅰ. This material was prepared by using a two-step strategy and the preparation process was optimized. The physical and chemical properties were investigated using scanning electron microscopy, Fourier-transfer infrared spectroscopy, X-ray diffraction and nitrogen adsorption-desorption techniques. Adsorption properties were evaluated by binding experiments. The melamine modified material exhibited a uniform morphology, high specific surface area (460.20 m 2 g −1 ), high adsorption capacity (25.57 mg g −1 ), fast mass transfer rate and excellent selectivity. Further, a specific and sensitive method was established by using this material as adsorbent of mini-solid phase extraction. The limit of detection was as low as 0.02 μg mL −1 . Therefore, melamine modified metal-organic framework is an ideal adsorbent for the recognition and enrichment of aristolochic acid Ⅰ.
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TALANTA
·
2020
·
IF 5.339
Yanxiao Jiang,Bo Zhang,Jingkang Li,Ying Sun,Xinghua Wang,Pinyi Ma,Daqian Song
A novel vortex-assisted solid-phase extraction method based on MIL-68(Al)/Chitosan-melamine sponge column (or V-MIL-68(Al)/CS-SC-SPE) is presented in this paper. The MIL-68(Al)/Chitosan-sponge column was prepared by a simple infiltration method and a preparation process that does not consume organic solvents. Scanning electron microscopy was used to characterize the functionalized sponge columns, and the skeleton and pores of the melamine sponge were successfully modified with the coating material (MIL-68(Al) and chitosan). Chitosan was used successfully not only as an adsorption adjuvant material, but also as an adhesive in the preparation of MIL-68(Al)/CS coating sponge materials. The presented method was further combined with high performance liquid chromatography (HPLC) and used in the determination of trace parabens (including methyl-, ethyl-, propyl- and butyl-parabens) in environmental water samples. Several important factors that affect the extraction performance were investigated. Under the optimum conditions, the method was successfully used to detect the four kinds of parabens in different water samples (domestic water, lake water and river water). The limits of detection ranged between 0.21 and 0.50 ng/mL, and the relative standard deviations for all parabens were below 10.8%.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2021
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IF 7.664
Yao-wen Shao,Wen-wen Hu,Meng-hang Gao,Yuan-yuan Xiao,Ting Huang,Nan Zhang,Jing-hui Yang,Xiao-dong Qi,Yong Wang
The liquid leakage, low light absorption capability and strong rigidity severely limit large-scale applications of phase change materials (PCMs). In this work, novel PCM composites with good encapsulation property, superior solar-to-thermal conversion efficiency and shape memory function were fabricated by introducing MXene-coated melamine foam (MF@MXene) into poly(ethylene glycol) (PEG). The MF@MXene/PEG composites showed satisfactory dimension retention ratio (90%) and phase change enthalpy (194.1 Jg −1 ). The three-dimensional MXene network constructed along the MF skeleton imparted the PCM composites with the ability to absorb and store the solar-energy as latent heat. Sunlight irradiation measurements suggested that the solar-thermal conversion efficiency reached 92.7%. Moreover, combining the resilience of MF@MXene sponge and the phase transition of PEG, the PCM composites exhibited remarkable shape fixation and recovery effects. A flexible heat eye-patch was further developed, which could be closely attached on human eyes and provided long-time thermal comfort within a stable temperature range.
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TALANTA
·
2019
·
IF 4.916
Qian Li,Hongbo Wang,Xuanfeng Yue,Jianxiu Du
Barium sulfate-coated CsPbBr 3 perovskite nanocrystals (CsPbBr 3 NCs@BaSO 4 ) was successfully synthesized that exhibited stable and intense fluorescence property in aqueous buffer. With the CsPbBr 3 NCs@BaSO 4 as signal readout, an ultrasensitive fluorescence nanosensor was developed for turn-on determination of melamine by the manipulation of inner filter effect of citrate-protected gold nanoparticles (AuNPs). The fluorescence of the CsPbBr 3 NCs@BaSO 4 was remarkably quenched by the AuNPs due to inner filter effect. This inner filter effect could be weakened by the addition of melamine as a result of melamine-triggering aggregation of the AuNPs and subsequently led to a recovery in the fluorescence of the CsPbBr 3 NCs@BaSO 4 . The recovery ratio was proportional to the concentration of melamine in the range of 5.0–500.0 nmol/L. The limit of detection was 0.42 nmol/L and the relative standard deviation was 4.0% for the repetitive determination of 500.0 nmol/L melamine solution (n = 11). The nanosensor was successfully applied to analysis of melamine in dairy product samples.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Huanxian Shi,Qiqi Nie,Min Yang,Cunjin Wang,Enzhou Liu,Zhen Ji,Jun Fan
In this paper, a novel ratiometric fluorescence probe for melamine detection based on luminescence resonance energy transfer (LRET) between the NaYF 4 :Yb, Er upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs) was developed. The detection mechanism could be interpreted to the AuNPs quenched the fluorescence intensity (F 542 and F 654 ) of the UCNPs under 980 nm excitation. after melamine addition, the fluorescence intensity of the UCNPs was recovered due to the aggregation of Au NPs. A good linear relationship between the ratio of F 542 to F 654 nm (F 542 /F 654 ) was obtained in ranges of 20-200 μg/L of the melamine concentration and the limit of detection was 8.8 nM. Besides, The probe exhibited an excellent selectivity and good sensitivity to melamine, and achieved the melamine detection in real sample. This work paved a new avenue for the potential practice application for commercial instantaneous determination of the melamine.
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ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Jiangxue An,Li Li,Yaping Ding,Weijuan Hu,Dingding Duan,Huan Lu,Daixin Ye,Xiaoli Zhu,Hongxia Chen
A novel electrochemical sensor based on molecularly imprinted polymer (MIP) and iron metal-organic frameworks was fabricated for highly sensitive detection of melamine (MEL) in this work. MIL-53(Fe), a kind of iron metal-organic frameworks, was prepared by a simple solvothermal method . The molecularly imprinted polymer films with specific recognition sites were synthesized by electropolymerization using methacrylic acid (MAA) as functional monomers interacted with MEL as templates. MIL-53(Fe) was characterized by XRD and FT-IR. The morphology of the MIP modified electrode was characterized by scanning electron microscopy. Under the optimal conditions, the molecularly imprinted electrochemical sensor (MIECS) shows a wide linear range of 10 −11 M to 10 −6 M for MEL with a detection limit (3σ) as low as 8.21 × 10 −12 M. Moreover, the MIP sensor shows high selectivity for melamine, good reproducibility and stability. The MIECS has been applied to the real detection of melamine in liquid milk samples with satisfying results.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Yaning Xu,Tiantian Wu,Ziwei Cui,Lixing Kang,Jianzhang Li,Yahui Cai,Dan Tian
Frequent oil spills and oily sewage have caused serious environmental problems. Sponges have attracted great attention in oil-water separation due to their low cost and high porosity, but it still remains challenge to hydrophobic modification of sponge in facile and scalable manner. Here is reported a facile fabrication of porous and hydrophobic sponge composite (MS@COF) with effective oil-water separation by in-situ growth of hydrophobic TFB-BD(Me) 2 COF on the surface of melamine sponge. Combining the porous structure of the sponge and hydrophobicity of COF, the composite can separate oil-water mixture and water-in-oil emulsions in a fast way. The prepared MS@COF showed oil adsorption capacity up to 160 g g -1 . In addition, continuous separation of oil-water mixture was demonstrated using a peristaltic pump with a separation rate of 50 mL min -1 . More importantly, the composite could separate surfactant-stabilized water-in-oil emulsions with separation efficiency of 98.8%. The oil-water mixture and oil-water emulsion separation ability of the composite persisted after 50 separation cycles thereby demonstrating good recyclability . The composite also showed good chemical stability, mechanical and flame retardancy. This work introduces a new approach for the synthesis of hydrophobic sponge decorated with COF nanoparticles for oily wastewater treatment and organic pollutant removal on water surfaces.
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MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Zhuxian Gao,Yuanyuan Li,Yulong Ma,Wenxin Ji,Tong Chen,Xiaoxia Ma,Hong Xu
Functionalized melamine sponge based on β-cyclodextrin (β-CD) and graphene oxide (GO) as a new solid phase extraction (SPE) adsorbent, was developed for determination of malachite green (MG) in seafood, coupled with high-performance liquid chromatography (HPLC). The obtained sponge prepared by an easy method and simple step, is placed into a syringe to enrich quickly MG. The extraction procedure was further improved by investigating the effects of the experimental parameters on pre-enrichment of MG. The present method had been successfully applied to determination of MG from crayfish and squid sample and obtained satisfied recovery value (88.6–100.8%) with coefficient of variance below 2.6–9.2% ( n = 3), which indicated that the method was suitable for the analysis of MG in complex samples. The method displayed good linear relationship in the concentration range of 0.5–20 μg mL − 1 (R 2 > 0.99), the low limit of detection of 0.21 mg L − 1 and 1.0 mg kg − 1 for food samples. Therefore, the β-CD-GO/MeS material has great application potential in the area of pre-concentration of complex matrix.
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