ACS Sustainable Chemistry & Engineering
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2019
·
IF 6.97
Hai-yan Wu,Ruo-tian Chen,Yao-wen Shao,Xiao-dong Qi,Jing-hui Yang,Yong Wang
Form-stable phase change materials (PCMs) are widely used for thermal management. However, the strong rigidity and the weak photoabsorption ability have hindered their practical applications. Herein, we report a flexible PCM based on paraffin wax (PW) and polydopamine-coated melamine foam (MF@PDA) for the seamlessly combined light-actuated shape memory and light-to-thermal energy storage capability. The MF@PDA foams with different PDA contents, which act as supporting scaffolds to adsorb PW, are successfully obtained by varying the immersion times and the dopamine concentrations. The low density and high porosity of MF@PDA foams allow for high weight fraction of PW to be incorporated, making the PCMs show high latent heat and encapsulation ability. Simultaneously, the elastic MF@PDA foams impart the PCMs with good shape memory property by triggering the phase transition of PW. More importantly, due to the efficient photothermal effect of PDA coating, the PCMs exhibit excellent light-actuated shape memory effect (shape recovery ratio ∼ 100%, shape recovery speed ∼ 100 s) and solar-to-thermal energy storage efficiency (80.8%). The light-actuated shape recovery rates and the solar-to-thermal transfer rates are increased with the augmented amount of PDA coating. Besides, the PCMs exhibit quite stable shape memory cyclic performance and thermal reliability. This study provides a new strategy to design flexible and light-responsive PCMs with the potential to be used in advanced solar energy storage systems.
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SENSORS AND ACTUATORS B-CHEMICAL
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2014
·
IF 3.84
Xianyi Cao,Fei Shen,Minwei Zhang,Chunyan Sun
A very practical and competitive sensing strategy for melamine has been developed based on the efficient inner filter effect (IFE) of Ag nanoparticles (AgNPs) on the fluorescence of eco-friendly ZnSe quantum dots (QDs). The fluorescence emission of ZnSe QDs could be quenched significantly by AgNPs via IFE, which resulted in a fluorescence “off-state”. The presence of melamine could induce the aggregation of AgNPs and modulate the IFE process. Thus the IFE-decreased fluorescence could gradually recover in a melamine concentration-dependent way, thereby achieving the fluorescence “turn-on” sensing for melamine. The detection mechanism was clearly illustrated and the influences of various experimental conditions were also investigated. Under the optimal conditions, a decent linear relationship for melamine was obtained in the range from 1.0 to 36 μg L −1 , and the detection limit was as low as 0.11 μg L −1 . The IFE-based strategy was successfully applied for melamine analysis in raw milk and egg samples and satisfactory results have been achieved. Therefore, it is very promising to use this simple, rapid, sensitive and eco-friendly method for on-site and real-time screening of melamine.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuangqing Li,Ning Zhang,Heqiu Chen,Zongrui Zhang,Yafei Zhao,Yinze Yang,Huishan Shang,Dan Wang,Bing Zhang
Exploiting inexpensive composite phase change materials (PCMs) with comprehensive characteristics of high encapsulation efficiency, good leakage resistance, strong flexibility, high heat conductivity, and powerful light absorption is considerably imperative for their solar-thermal and solar-thermal-electric conversion. Herein, polypyrrole (PPy) modified halloysite (HNT/PPy) was assembled into the pores of melamine formaldehyde (MF) sponge to construct hierarchical porous structure (MHP), in which PPy serves as light absorber and heat conducting agent to consolidate the light absorption and thermal conductivity, while the interwoven HNT in MF not only acts as carrier to provide sufficient space for guaranteeing more PCMs’ encapsulation, but also dramatically narrows MF’s pore size and prevents PCMs’ leakage. As expected, the MHP can encapsulate as high as 95 wt% of polyethylene glycol (PEG) with extremely high latent heat of 177.8 J g −1 (PEG@MHP). The rich hydroxyl groups on PEG, PVA and HNT form strong hydrogen bond interaction, effectively improving the leakage-proof performance of PEG@MHP. Especially, PEG@MHP with 82 wt% encapsulation ratio (PEG@MHP-82) demonstrates unexceptionable leakage resistance (negligible leakage at 100 °C), strong light absorption (97 %), good photothermal conversion efficiency (90.36 %), and high thermal conductivity (0.235 W m −1 K −1 ). Except that, the solar-thermal-electric (STE) conversion system assembled with PEG@MHP-82 enables efficient voltage and current outputs of 587 mV and 83.3 mA respectively under 3 kW m −2 with heat dissipation in water. Encouragingly, the voltage output still achieves 154.7 mV under actual outdoor illumination (0.984 kW m −2 ). This work provides a simple method to efficiently encapsulate PCMs for realizing high-efficiency solar-thermal and solar-thermal-electric conversion.
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高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Ruidong Zhou,Cong Kong,Yupeng Wen,Guangxin Yang,Wendi Huo,Chaoying Zhang,Huiwu Sun,Huan Liu,Dongmei Huang,Jincheng Li
A 15-channel pressure filtration purification method was presented for high throughput sample preparation of aquatic products. A cost-effective device was constructed and melamine sponge was selected as the cleanup sorbent. Upon interfacing with HPLC-MS/MS, the analytical procedure demonstrated its suitability for quantifying 160 pesticides and veterinary drug residues in aquatic products such as fish, shrimp, and crab. The method achieved sample recoveries ranging from 61.3 to 124.9 %. The detection limits were established between 0.5 and 1.0 μg/kg, while the quantitation limits were confirmed to be within the range of 1.0–2.0 μg/kg. The method was applied to quantify the pesticide and veterinary drug residues in mostly consumed aquatic products from five coastal provinces in China. The results showed significant differences between different aquatic products in the concentrations of pesticide and veterinary drug residues, implying the necessity of supervision for the accurate determination of pesticides and veterinary drugs.
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高影响因子
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yuelin Kong,Tiantian Lei,Yu He,Gongwu Song
Carbon nitride quantum dots (CNQDs) were embedded in the sodium carboxymethyl cellulose (CMC) matrix to form CNQDs-CMC film to explore the room temperature phosphorescence (RTP) of CNQDs, which suppress the non-radiative relaxation process due to the internal hydrogen bonding interactions between CMC and CNQDs. Then, a simple, inexpensive, background-free miniature device integrating with CNQDs-CMC film and smartphone was fabricated for rapid and quantitative detection of melamine (MEL). In the present of MEL, the yellow RTP color of the CNQDs-CMC film was quenched and photographed by the smartphone. The Color Recognizer APP in the smartphone recognized the red (R) value for quantitative detection of MEL. Thus, digital image colorimetry (DIC) determination of MEL was achieved due to the visible RTP color change of CNQDs-CMC film. The smartphone-based miniature device provided a promising platform for the on-site monitoring analytes in the complex matrix including food safety, environmental screening, health monitoring, and disease prevention.
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PubMed
高影响因子
Applied Sciences-Basel
·
2017
·Vol. 7
·期 5
·475
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IF 1.679
Jing Neng,Jiayuan Tan,Kan Jia,Peilong Sun
A fast and cost-effective melamine detection approach has been developed based on surface enhanced Raman spectroscopy (SERS) using a novel hydrogen bonding-assisted supramolecular matrix. The detection utilizes Fe3O4/Au magnetic nanoparticles coated with 5-aminoorotic acid (AOA) as a SERS active substrate (Fe3O4/Au–AOA), and Rhodamine B (RhB) conjugated AOA as a Raman reporter (AOA–RhB). Upon mixing the reagents with melamine, a supramolecular complex [Fe3O4/Au–AOA•••melamine•••AOA–RhB] was formed due to the strong multiple hydrogen bonding interactions between AOA and melamine. The complex was separated and concentrated to a pellet by an external magnet and used as a supramolecular matrix for the melamine detection. Laser excitation of the complex pellet produced a strong SERS signal diagnostic for RhB. The logarithmic intensity of the characteristic RhB peaks was found to be proportional to the concentration of melamine with a limit of detection of 2.5 µg/mL and a detection linearity range of 2.5~15.0 µg/mL in milk. As Fe3O4nanoparticles and AOA are thousands of times less expensive than the monoclonal antibody used in a traditional sandwich immunoassay, the current assay drastically cut down the cost of melamine detection. The current approach affords promise as a biosensor platform that cuts down sample pre-treatment steps and measurement expense.Keywords:surface enhanced Raman spectroscopy (SERS);Fe3O4magnetic nanoparticles;melamine;detection;supramolecular hydrogen bonding;matrix
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GREEN CHEMISTRY
·
2024
·Vol. 26
·期 6
·3211-3220
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IF 9.3
Pengfei Li,Yehong Han,Dandan Han,Hongyuan Yan
An innovative solid-phase microextraction (SPME) fiber coating, melamine–formaldehyde resin (MFR), was synthesized with a green cross-linker (paraformaldehyde), and it exhibited high heat resistance (up to 350 °C). Seven polycyclic aromatic hydrocarbons (PAHs) were chosen as analytes, and the results demonstrated the MFR-based SPME fiber's exceptional enrichment capabilities and efficient extraction, with high enrichment factors and significantly improved efficiency compared to the conventional polydimethylsiloxane (PDMS) fibers. The unique superiority of the MFR was attributed to its strong π–π interactions and amino-associated enhancement, as well as its porous structure and rough surface, which provided abundant adsorption sites and facilitated rapid mass transport of analytes. Furthermore, the preparation conditions of the MFR-coated SPME fiber were compared with those of commercially available and reported fibers, emphasizing the advantages of the MFR-coated fiber, such as its simplicity, cost-effectiveness, reproducibility, and eco-friendliness. The MFR-based SPME fiber exhibited significant advantages, including high enrichment factors (ranging from 1906- to 7153-fold) for PAHs and good fiber-to-fiber reproducibility (8.7–14.6%), outperforming commercially available PDMS fibers by a factor of 4.9–82.8-fold. This study also considered important factors affecting the extraction process, such as ionic strength, temperature, and time, and optimized these parameters for the best extraction efficiency. The greenness of the developed method was assessed using the Analytical Eco-Scale, and the results showed that it was green in terms of reagent dosage, energy consumption, and waste. The developed headspace solid phase microextraction–gas chromatography–tandem mass spectrometry (HS-SPME-GC-MS/MS) method based on the MFR coating exhibited excellent precision, accuracy, and repeatability, making it a reliable method for the determination of trace PAHs in environmental water samples.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yingying Deng,Sining Yun,Jiaoe Dang,Yongwei Zhang,Changwei Dang,Yinhao Wang,Zhuolei Liu,Zan Gao
Designing efficient nanohybrid electrocatalysts with advanced structure is of great essential for energy conversion devices. Herein, a multi-dimensional hierarchical strategy is proposed to design melamine sponge-derived sulfur and nitrogen co-doped tetrapod carbon (SNTC) supported cobalt–nickel telluride (CoTe 2 /SNTC, NiTe 2 /SNTC, and CoNiTe 2 /SNTC) 1D/3D and 0D/3D nanohybrids for boosting hydrogen evolution reaction (HER) and triiodide reduction reaction (IRR). Among these, the CoNiTe 2 /SNTC 0D/3D hybrid exhibited superior catalytic activities and excellent electrochemical stability. In alkaline HER, the CoNiTe 2 /SNTC catalyst had a low Tafel slope of 72 mV dec −1 , which was comparable to that of Pt/C (49 mV dec −1 ). CoNiTe 2 /SNTC served as counter electrode catalyst in photovoltaics and obtained a power conversion efficiency (PCE) of 8.11%, which is higher than that of Pt (7.25%). This investigation provides a novel approach for designing highly efficient nanohybrid catalysts in advanced energy devices.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xu Xu,Yumeng Liu,Jia Lv,Baocheng Ji,Junguang Li,Ke Li,Dianbo Zhao,Yanhong Bai
A modified QuEChERS method was developed in analysis of 52 veterinary drugs. • A novel MIL-101(Cr)–rGO@melamine sponge composite was fabricated. • The fast matrix purification could be achieved within several seconds. • Matrix cleanup was achieved through simple soaking and squeezing. • The method showed low matrix effects, good recoveries, and high precision. Herein, we report the fabrication of an elastic, quick, easy, cheap, effective, rugged, and safe adsorbent using a functionalized melamine sponge (MLS) and used it for the high-throughput analysis of 52 veterinary drugs in beef liver samples via ultraperformance liquid chromatography–tandem mass spectrometry. The as-prepared adsorbent was obtained by successive loading of Matérial Institut Lavoisier-101 (Chromium) [MIL-101(Cr)] and reduced graphene oxide (rGO) on melamine sponge skeletons. Excellent linearity with determination coefficients of ≥0.9942 was obtained across a range of 0.25–200 μg·kg −1 . Relatively low limits of detection (0.1–4.9 μg·kg −1 ) and limit of quantitation (LOQ; 0.3–16.2 μg·kg −1 ) were obtained. When fortified at three levels (1×, 5×, and 10× LOQ), spiked recoveries varied between 63.5% and 115.4%, with the intraday and interday relative standard deviations of ≤12.9%. Through direct infiltration and compression, efficient matrix purification was accomplished within seconds, yielding negligible matrix effects (from −18.4% to +19.1%). Thus, the MIL-101(Cr)–rGO@MLS adsorbent possesses high potential for fast, convenient, and efficient matrix purification in complex sample analysis. Download: Download high-res image (179KB) Download: Download full-size image
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TALANTA
·
2022
·
IF 6.556
Lin Li,Yingying Li,Sijia Zhang,Ting Wang,Xiaohong Hou
In this study, MIL-101(Cr)/cellulose aerogel/melamine sponge composite was fabricated through a simple soaking method. The composite was packed in the syringe barrel and used as the sorbent for microextraction in packed syringe. Coupled to UPLC-MS/MS, the proposed method was employed for the analysis of trace nitroimidazoles in water samples. The parameters affecting the extraction efficiency, including sorbent type, pH value of sample solution, sample solution volume and elution solvent were optimized. Under the optimal conditions, good linearity (r > 0.99 for five analytes), high sensitivity (limit of detection: 8.250–16.33 ng L −1 ), ideal precision (intra-day precision: 1.1%–5.3%, inter-day precision: 1.8%–6.7%) and satisfactory accuracy (recovery: 70.4%–96.7%) were achieved. The proposed method was proved to be efficient, easily operative and environmentally friendly.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2022
·
IF 9.463
Fei Xue,Chen-hui Huang,Xiao-dong Qi,Jing-hui Yang,Cheng-shou Zhao,Yan-zhou Lei,Yong Wang
Solid-liquid organic phase change materials (OPCMs) appeal tremendous attention in thermal energy storage and management for their various merits. However, low thermal conductivity (TC), inferior encapsulation ability and fatal fire hazard significantly impair the application accessibility of the OPCMs. This work designed and fabricated a new three-dimensional (3D) melamine foam (MF)/phosphorous cellulose (PC)/graphite nanoplatelets (GNPs) (MF/PC/GNP) network to compound with the OPCMs with all these problems simultaneously sovled. With the assistance of MF-modified ice-templated method and PC, the GNPs form a dense network to efficiently enhance the TC of the composite PCMs to 1.08 W/(m·K) at a relatively low content of 2.39 wt%, while the electric conductivity (EC) reaches 0.690 S/cm. In addition, the peak of heat release rate (PHRR) of the composite PCMs decreases from 725.62 kW/m 2 of pure PEG to 624.04 kW/m 2 . Besides, the MF/PC/GNP network also endows the composite PCMs with multiple energy-transition aiblities.
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APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Wen-Juan Yan,Sheng Xu,Chi-Jie Ding,Zhi-Hao Liu,Yan Hu,Qi-Xun Fan,Jiang-Shuo Li,Xian-Yao Tian,Hong-Yan Zeng
In this paper, an interlayered/surface-modified flame retardant (LDHs@PA-MEL) was prepared via a one-pot method with phytic acid (PA), melamine (MEL), and layered double hydroxides (LDHs-C) and used as a novel flame retardant for polypropylene (PP). In LDHs@PA-MEL, PA and MEL self-assembled to form a PA-MEL supramolecular network for functionalization on the surface of LDHs-C, and phytate anions intercalated into the interlayer . The extreme dispersibility of LDHs@PA-MEL in PP is attributed to the dual modification of PA and MEL. With the addition of 20 wt%, the PP/LDHs@PA-MEL composites achieved the limiting oxygen index (LOI) of 29.6%, whereas the PP/LDHs-C composites exhibited only LOI of 24.8%. The peak heat release rate (PHRR), total heat release (THR) and total smoke production (TSP) for PP/LDHs@PA-MEL were 409 kW∙m −2 , 70.3 MJ∙m −2 , and 7.1 m 2 , respectively, which presented declines of 63.5%, 26.2% and 43.7% compared with those of Neat PP. The flame retardancy of LDHs@PA-MEL was mainly due to catalytic charring, release of non-combustible gases, and physical barrier effects. More specially, this work provides a feasible method for the preparation of high-performance PP composites.
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