International Journal of Green Energy
·
2025
·
IF 3.1
Xuefei Zhang,Zhang Wei,Chengyao Wang
Microencapsulated phase change materials (MEPCMs) effectively settle drawbacks of phase change materials, such as leakage, and are widely used in realms of intelligent temperature control fibers and textiles, building energy conservation, and thermal energy storage systems. Based on the in-situ polymerization method, melamine urea-formaldehyde (MUF)@n-hexadecane MEPCMs are fabricated and modified by adding graphene oxide (GO) to the shell to enhance the thermal conductivity. Characteristics of MEPCMs are demonstrated with field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and Hot Disk constant analyzer. The GO/MUF@n-hexadecane MEPCMs possess satisfactory thermal storage performance and thermal stability. The addition of GO has little influence on the micromorphology and chemical structure of MEPCMs. As GO content increases, the thermal conductivity of GO-modified MEPCMs has been significantly improved. Modified MEPCMs with 0.1wt% GO possess average latent heat value and highest encapsulation efficiency at 217.2 J/g and 95%, respectively. Those with 0.3wt% GO have integrated microstructure and highest thermal conductivity coefficient at 0.1554W/(m·K), 89.05% higher than unmodified MEPCMs. Modified MEPCMs mainly undergo a two-step degradation process, indicating that the GO-modified MUF shell plays a certain role in blocking the thermal decomposition of the core.
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产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Zhipeng Xie,Jinlong Lei,Mingfeng Yang,Youji Li,Xinhua Geng,Simin Liu,Jiahai Wang
Amine group-bearing small molecules tend to adsorb onto the nanochannel surfaces, which degrades the efficiency of nanochannel sensors. In this study, we utilized host-guest knowledge to eliminate the influence of excessive small molecules. In combination with single-walled carbon nanotubes (SWNTs), β-cyclodextrin (β-CD) provided an excellent sensing performance for the conical nanochannel coated with polyethyleneimine (PEI) and zirconium ion (Zr 4+ ). By taking detection of melamine as a prototype, the as-prepared nanochannel could selectively detect melamine-elicited double-stranded DNA (dsDNA). Both excessive melamine and single-stranded DNA were removed via the addition of β-CD and SWNTs. The nanochannel sensing platform for the detection of melamine has a detection limit of as low as 4.3 nM with a suitable sensitivity, an excellent reproducibility and stability. Therefore, it is highly promising that a nanochannel sensor based on ion current rectification (ICR) can be used to detect other possible targets.
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 29
·2423361
·
IF 19
Peihui Chen,Jian Deng,Zikai Guo,Xinxi Li,Wensheng Yang,Yuhang Wu,Ya Mao,Wei Jia,Jianzhe Liu,Canbing Li
Composite phase-change materials (CPCMs), with their substantial latent heat storage and release capabilities at a consistent transition temperature, are extensively employed in diverse thermal-energy-storage applications. However, the risk of thermal runaway remains a significant challenge owing to the flammability and potential leakage of CPCMs. Attempts to develop flame-retardant PCMs using various fireproof polymers through physical methods exist. In this study, a novel multifunctional flame-retardant solid–solid phase-change material is developed through a chemical modification process, incorporating polyethylene glycol 2000, boric acid, phosphorus pentoxide (P 2 O 5 ), expanded graphite, ammonium polyphosphate (APP), and melamine (MA). This composite material exhibits superior flame retardancy and thermal stability, making it highly suitable for enhancing the safety of battery modules. Experimental results demonstrate that PCAM2, containing 20 wt% MA and 8 wt% APP, maintains 97.75% mass retention at 250 °C for 5 h and achieves the V-0 rating (burning stops within 10 s) according to the UL-94 standard. Moreover, a battery module incorporating PCAM2 demonstrated superior thermal-management capabilities than three other modules. Even after ten cycles at a 2C discharge rate, it maintained a peak operating temperature below 60 °C. Notably, the flame-retardant CPCM films exhibited significant thermal propagation time, indicating superior temperature control and the ability to inhibit thermal runway. The intrinsically flame-retardant CPCM developed in this study holds considerable promise for use in next-generation thermal safety systems for electric-vehicle battery packs and energy-storage applications.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Baofang Zhang,Renlian Chen,Zefan Yang,Yingxin Chen,Lihua Zhou,Yong Yuan
Developing efficient and cheap electrocatalysts as substitutes for commercial Pt/C in the oxygen reduction reaction(ORR)is extremely necessary. Herein, paper mill sludge (PMS) was utilized to produce iron, nitrogen and sulfur co-doped carbon nanotube/nanoporous carbon nanocomposite (PMS-CNT/C) by pyrolysis . PMS-CNT/C-b, one of as-prepared PMS-CNT/C exhibited excellent oxygen reduction reaction activity with an onset potential of 0.99 V vs. RHE and half-wave potential of 0.77 V vs. RHE, which was similar to the commercial Pt/C catalyst (onset potential of 0.99 V vs. RHE and half-wave potential of 0.76 V vs. RHE). It had longer-term stability and higher methanol tolerance in alkaline medium than Pt/C. Moreover, the new catalyst also exhibited excellent catalytic performance in neutral solution. The energy output of microbial fuel cells loaded with PMS-CNT/C-b catalyst was also higher than that of commercial Pt/C under neutral condition. The excellent ORR performance of PMS-CNT/C-b was due to the carbon nanotube/nanoporous structure and the synergistic effect of abundant N groups, iron nitrides and thiophene-S. The formation of CNTs in the carbon nanotube/nanoporous carbon nanocomposite was mainly attributed to melamine , which was added into PMS and was at first just considered as a nitrogen source to develop N-doped PMS-based catalysis in this work. The synthesis of paper mill sludge-based carbon nanotube/nanoporous nanocomposite and its excellent ORR activity will make the new catalyst a promising cathodic electrocatalyst alternative for fuel cells.
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DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2017
·Vol. 49
·期 2
·245-255
·
IF 2.969
Xiu Liang,Xiao-Juan Zhang,Ting-Ting You,Nan Yang,Guang-Sheng Wang,Peng-Gang Yin
MoS 2 , a novel inorganic graphene analogues with typical two-dimensional structure, has attracted increasing interest in various fields. MoS 2 -based hybrid plasmonic structures have been extensively investigated as higher quality surface enhanced Raman scattering (SERS) substrates. Herein, we have designed a three-dimensional (3D) MoS 2 nanospheres (NSs) based hybrid nanostructure as SERS sensor by decorating Au nanoparticles (NPs) on the surface of 3D MoS 2 -NSs (3D MoS 2 -NS@Au-NPs). 3D MoS 2 -NSs acts as (a) a stable scaffold for Au NPs decoration via microwave-irradiation hydrothermal process, (b) a chemical mechanism source for Raman enhancement, and (c) a 3D spatial structure for generation of more effective hot spots due to Au coupling effect and supply larger surface area for adsorbing probe molecules. The 3D MoS 2 -NS@Au-NPs hybrid structure exhibits 56-fold improvement on enhancement factor compared to two-dimensional MoS 2 -NST@Au-NPs hybrid structures. SERS performance was easily and effectively optimized with the tuning of the density and sizes of Au NPs. The optimized 3D MoS 2 -NS@Au-NPs was applied as SERS sensor for melamine detection in milk. Quantitative detection was realized in the range of 1 ppb–10 ppm with a linear coefficient of .997. Excellent sensitivity of 1 ppb and uniformity of 10.12% relative standard deviation was achieved, which could meet the demand for melamine detection as prescribed by the U.S. Food and Drug Administration.
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DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2018
·
IF 3.412
Li Tang,Shi Mo,Shi Gang Liu,Yu Ling,Xiao Fang Zhang,Nian Bing Li,Hong Qun Luo
In this work, Ag nanoparticles (AgNPs) were synthesized quickly by a one-step method utilizing polydopamine-glutathione nanoparticles (PDA-GNPs) as a reducing agent. The PDA-GNPs and the generated AgNPs acted as the energy donor and acceptor, respectively. Accordingly, the fluorescence of PDA-GNPs was quenched on the basis of fluorescence resonance energy transfer (FRET). In the presence of melamine, the preferential combination of Ag(I) and melamine to form Ag(I)–melamine complex prevents Ag(I) from forming AgNPs, together with fluorescence enhancement compared with the absence of melamine. Under the optimal conditions including the concentration of AgNO3, reaction time, reaction temperature, and pH, the fluorescence enhancement efficiency has a linear response to the concentration of melamine from 0.1 to 40 μM with a detection limit of 23 nM for melamine. The proposed method is simple, time-saving, and low-cost, which was further applied to detect melamine in real milk products with satisfactory results.
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DOI
高影响因子
Advanced Electronic Materials
·
2024
·Vol. 11
·期 2
·2400265
·
IF 5.3
Jiaao Yu,Hui Luo,Sihai Lv,Zhihui Wang,Fu Chen,Yongzhi Cheng,Xiangcheng Li
The development of novel materials with high-efficiency microwave absorption is crucial for mitigating the adverse impacts of electromagnetic pollution. In this study, MXene and FeNi Prussian blue analogs (PBA) are assembled onto a melamine foam using self-assembly and in situ growth technique. Subsequently, magnetic carbon foam, comprising FeNi alloys, TiN and carbon with various morphologies, is synthesized via carbothermal reduction reaction. The surface morphology electromagnetic properties are significantly influenced by the pyrolysis temperature. The results revealed that the magnetic carbon foam composite demonstrated an effective microwave absorption bandwidth of 4.72 GHz at a thickness of only 1.5 mm, with a minimum reflection loss of −24.83 dB at 1.3 mm. The outstanding microwave absorption performance can be attributed to the 3D conductive network formed by N-doped carbon, as well as the contributions from polarization loss, magnetic loss, and suitable impedance matching. Furthermore, the corresponding absorber coating demonstrated a maximum reduction value of radar cross-section (RCS) by 13.16 dB m 2 . This research offers novel insights for the development of lightweight and efficient low-filled electromagnetic composite for broadband microwave absorption.
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DOI
高影响因子
TALANTA
·
2014
·
IF 3.511
Jiang Liu,Han Song,Jie Liu,Yuan Liu,Le Li,Hui Tang,Yingchun Li
In this study, a rapid and accurate determination strategy was established for simultaneous measurement of melamine (MLM) and dicyandiamide (DCD) directly in powdered milk by coupling molecularly imprinted solid-phase extraction (MISPE) with high performance liquid chromatography (HPLC). A novel double-template technique was adopted for preparing SPE packing agent and the obtained double-templated (MLM and DCD) molecularly imprinted polymers (MD-MIPs) was characterized by Fourier-transform infrared spectroscopy and scanning electron microscope (SEM). The molecular recognition ability and the binding capability of the as-prepared polymers towards MLM and DCD were evaluated via static and dynamic binding tests, and it was found that the MD-MIPs showed better affinity and selectivity for both templates compared with single-templated MIPs and non-imprinted polymers (NIPs). An approach based on MISPE and HPLC was then developed and optimized to detect MLM and DCD in powdered milk. The detection limit of the method ( S / N =3) were 0.13 μg/g for MLM and 0.07 μg/g for DCD, and the relative standard deviation (RSD) of intra-day and inter-day determination for MLM was 3.3% and 4.7%, and 3.5% and 5.9% for DCD. The recoveries in MLM and DCD analysis at three spiked levels were 93.1–100.1% and 75.7–82.5%, respectively, with all RSD less than 5.2%.
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DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2022
·Vol. 16
·期 8
·1237-1246
·
IF 4.803
Sun Xiaofei,Feng Shijie,Zhang Zhe,Zhang Pengyu,Zhao Jiefeng,Gao Yunling,Yun Junxian
A Ag particle-coated and 1-dodecanethiol-modified melamine sponge (Ag-DDT-MS) was prepared through surface roughness by coating silver particles and subsequent grafting of a hydrophobic long hydrocarbon chain. Superhydrophobic and 3D porous Ag-DDT-MS was characterized by Fourier transform infrared spectroscopy, scanning electron microscope, energy-dispersive X-ray spectroscopy, and X-ray diffraction. The water contact angle of Ag-DDT-MS reached 159.2°. Ag-DDT-MS exhibited excellent absorption capacity for high viscous oils and organic solvents, ranging from 42.8 to 105.2 g·g −1 . The absorbed oils can be easily collected by the mechanical pressing process, and the oil recovery rate was satisfactory, more than 90% after 20 recycles. Ag-DDT-MS material also demonstrated good stability and excellent compression-recovery ability, keeping 88.6% of the initial height after ten compression-release cycles.
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 38
·18019-18024
·
IF 3.591
Jing Ding,Xiangyang Zhou,Chucheng Luo,Juan Yang,Jingjing Tang
FeF3·0.33H2O with a special one-dimension tunnel structure has been considered as a potential cathode material. However, the low electron conductivity of FeF3·0.33H2O prevents its practical application. FeF3·0.33H2O coupled with a carbon material is an effective method to solve the low electric conductivity of FeF3·0.33H2O. Hence, we apply a facile approach using the catalyzed pyrolysis of melamine and a fluorination–annealing process to synthesize the N-doped CNTs/FeF3·0.33H2O composite with a bamboo-like morphology. The as-prepared composite displays a good cycling performance with a reversible discharge capacity of 160.7 mA h g−1 at 40 mA g−1 after 100 cycles and a good rate performance, as well as a good electrochemical performance even at a relatively high mass loading. The good electrochemical properties can be mainly ascribed to the fact that N-doped CNTs play the role of a cross-linked conductive network to provide an electron-transport expressway in the active material. This simple catalyzed pyrolysis and fluorination–annealing approach provides a promising avenue for the application of iron fluoride as a cathode material.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Junjie Zhang,Pei Chen,Wenran Gao,Wei Wang,Fatang Tan,Xinyun Wang,Xueliang Qiao,Po Keung Wong
Graphitic N-rich graphene (GNG) was prepared through a melamine-cyanurate (MC) supramolecule induced method by pyrolyzing the precursor of graphene oxide@melamine cyanurate composite (GO@MC). The fabricated sample at 800 °C (GNG8) possessed the high graphitic N content of 4.18%, which exhibited excellent capability to peroxymonosulfate (PMS) activation for degradation of organic pollutants. Results of electron paramagnetic resonance (EPR) spectra coupled with quenching experiments and density functional theory (DFT) calculations revealed that the graphitic N in graphene was the intrinsic active site for the cleavage of O-O bond in PMS to produce singlet-oxygen ( 1 O 2 ), responsible for organics degradation. Furthermore, the GNG/PMS system could work in a wide temperature range (5–45 °C), and the common matrix species of Cl − , NO 3 − , HCO 3 − and HA had negligible effect on the degradation performance. This study provided a facile strategy for the preparation of highly graphitic N doped graphene catalysts to powerfully degrade organic pollutants, and deep understand of the catalytic mechanism of GNG for PMS activation.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Shuang Song,Hao Yang,Chunping Su,Zhibin Jiang,Zhong Lu
We herein report the fabrication of recyclable, stable and cost-effective superhydrophobic reduced graphene oxide modified melamine foam (RGMF) through ultrasonic-microwave synergistic method for the first time. In the synthesis process, ultrasonic and microwave irradiation not only shortened the reduction time of graphene oxide (GO) with the existence of reducing agent, but also considerably enhanced the firmness of reduced graphene oxide (rGO) anchored onto the melamine foam (MF). The structure and property of the obtained RGMF were characterized by XRD, Raman, SEM and contact angle measurements. The results showed that the skeletons of MF were completely covered with rGO layers which were compact and full of wrinkles. The as-prepared RGMF was superhydrophobic without further modification. Besides, the RGMF showed excellent selective adsorption capacity of various oils and organic solvents from water. The maximum oil adsorption capacity was 112 times of the weight of the initial MF, and the adsorption capacity of the RGMF did not deteriorate after it was reused 20 times. More importantly, the RGMF showed good stability against cavitation erosion and corrosion liquids. All these features made the as-prepared material an ideal candidate for removal and collection of oils and organic solvents from water.
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高影响因子
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