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.
✓ 已验证
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.
✓ 已验证
DOI
高影响因子
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.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yuhan Zhang,Jiping Ma,Bolong Jiang,Bo Jiang,Guangnian Yuan,Shijie Wang
Uncontrolled discharge of oily wastewater and frequent oil spill accidents poses significant threats to human health and ecosystems, incurring substantial economic costs. Therefore, there is an urgent demand for the development of efficient and sustainable oil–water separation technologies. This study presents a novel method for fabricating superhydrophobic melamine sponges for oil–water separation. This technique involves the deposition of a hydrophobic heteroporous covalent organic framework (HCOF) in conjunction with polydimethylsiloxane (PDMS) onto the sponge substrate, thereby forming MS@HCOF-PDMS. The HCOF modifies the hydrophilic nature of the sponge into a hydrophobic one while significantly enhancing its specific surface area, which enables superior oil adsorption performance. PDMS can effectively enhance the hydrophobicity of materials. The fabricated sponges exhibited water contact angles of 139.6° and 153.2° at PDMS concentrations of 0 % and 0.5 %, respectively. The superhydrophobic polyurethane sponge demonstrated adsorption capacities ranging from 78 to 147.35 g/g for organics and oils, and it maintained high-efficiency adsorption with minimal capacity loss after 10 cycles. Compared with MS @ single-pore COF-PDMS (MS @ SCOF-PDMS), the adsorption capacity of MS @ HCOF-PDMS is significantly improved. Notably, the adsorption capacity for peanut oil shows the most pronounced difference, with MS@HCOF-PDMS exhibiting a 37 % higher adsorption capacity than MS@SCOF-PDMS. Additionally, the adsorption capacities for other substances are approximately 15 % greater. By utilizing the superhydrophobic material developed in this study, the separation efficiency for dichloromethane from water can reach up to 99.3 %. These findings provide a promising strategy to develop advanced superhydrophobic materials for oil–water separation.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yan Liu,Xiangju Mao,Wenshan Ni,Fang Xiao,Lei Fan,Kangkang Wang
Monolithic adsorbents have become promising materials for removing contaminants in wastewater. By combining the macrostructural advantage of monolithic materials with their excellent surface function, these materials offer significant potential for practical applications. This study proposes an efficient and economical preparation method for developing high-performance chitosan-based monolithic adsorbent for Pb 2+ removal. In brief, melamine foam (MF) was pre-modified with polydopamine (PDA), and chitosan (CS) was uniformly loaded onto the modified foam via a “crosslinking-surface deposition” process. The resulting monolithic adsorbent (CS/PDA@MF) exhibited a high adsorption capacity for Pb 2+ (174 mg g −1 ) and achieved equilibrium adsorption time (<120 min) in batch adsorption experiments. The material demonstrated excellent elastic properties, allowing for easy manual collection using tweezers. Six cycles of adsorption/desorption experiments proved satisfying reusability. Additionally, a fixed-bed column was prepared using CS/PDA@MF to investigate the continuous flow adsorption behavior, showing excellent potential for practical applications. The adsorption mechanism was explored by ATR FT-IR and XPS characterization. This study provides a technical foundation for research into high-performance CS-based monolithic adsorbents, which are expected to be promising candidates for environmental remediation.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Lei Qiao,Zhihong Zhou,Mingkun Wang,Zhiwei He
Frequent oil spills and the discharge of oily wastewaters have caused a serious threat to the environment, ecological systems, and the health of human beings. Herein, a durable photothermal and superhydrophobic melamine sponge has been prepared by decorating lignin microspheres (LMs) and TiO2 nanoparticles via the self-polymerization of dopamine. The superhydrophobic sponge shows excellent chemical stability, thermal stability, mechanical durability, and recyclability. The adsorption capacities of the superhydrophobic sponge for oils and organic solvents range from 22.4 to 84.2 g/g, showing high separation efficiencies larger than 98.6% after 15 cyclic tests. Due to the photothermal effect, the maximum surface temperature of the superhydrophobic sponge reaches 65.2 °C under solar irradiation (1 sun), and the superhydrophobic sponge successfully achieves the ice-free property at a low temperature of −17.8 °C under solar irradiation (0.5 sun). Besides, the LMs@TiO2 composite coating can be employed on several substrates (i.e., filter paper, carbon cloth, steel mesh, Al sheet, Cu sheet, and NdFeB) to realize surface superhydrophobicity, and exhibits excellent anticorrosion for the coated NdFeB. Therefore, this study proposes a low-cost and multifunctional superhydrophobic MS, opening a new avenue to the rational design of superhydrophobic MS for applications in oil/water separation, anti-icing, and anticorrosion.
✓ 已验证
产品关联
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.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2026
·
IF 9.2
Wei Liu,Zhengtong You,Shiqi Qin,Zhipeng Hu,Jiaxin Mu,Zhijun Zhang,Yanjun Xie,Qingwen Wang,Charles U. Pittman
Developing sustainable carbon materials with both dye adsorption and electrochemical properties offers a promising strategy for carbon neutrality. Herein, a coupled carbonization strategy was employed to prepare porous carbon with high-level heteroatom doping and hierarchical pores, involving the co-hydrothermal treatment of wood flour with phytic acid and melamine, followed by K 2 CO 3 activation. Phytic acid and melamine act as P/N sources and structural builders, promoting hydrochar formation via phosphate coordination and condensation reactions, resulting in a stable cross-linked network rich in N, P, and O. The resulting N, P co-doped hierarchical porous carbon (NP-PC) exhibits an ultrahigh surface area (2792 m 2 g −1 , a 344 % increase compared to pure wood flour-derived carbon), suitable mesoporosity (36 %), and tailored surface chemistry (19.86 at% heteroatom content). At room temperature, NP-PC demonstrates an exceptionally high adsorption capacity for methylene blue (3028 mg g −1 after 6 h contact) and rapid adsorption kinetics (90 % removal within 5 min), outperforming most reported carbon-based adsorbents. NP-PC retains an adsorption capacity above 2500 mg g −1 even after five regeneration cycles. As a supercapacitor working electrode, NP-PC electrode also shows excellent electrochemical performance, delivering a specific capacitance of 380 F g −1 at 0.5 A g −1 and retaining 273 F g −1 at 25 A g −1 . This study achieves the conversion of low-value biomass into high-performance functional carbons, providing a sustainable solution for integrated environmental and energy applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 12
·1-10
·
IF 6.408
Sun Min,Wang Xiuqin,Ding Yali,Feng Juanjuan
In order to improve the selectivity and stability of melamine–formaldehyde (MF) aerogel, it was composited with TiO 2 aerogel. A TiO 2 -MF hybrid aerogel was in situ prepared on the surface of carbon fibers for in-tube solid-phase microextraction (SPME). The extraction performance of TiO 2 -MF aerogel was regulated by changing the ratio of TiO 2 sol and MF sol during the material preparation. Coupled with high-performance liquid chromatography-diode array detection (HPLC–DAD), the extraction tube filled by TiO 2 -MF aerogel-coated carbon fibers was evaluated with several types of environmental pollutants including polycyclic aromatic hydrocarbons (PAHs), estrogens, and ultraviolet filters. Because of favourable extraction performance of PAHs they were selected as model analytes, and some important influence factors were optimized for satisfactory sensitivity. The detection limits were in the range 0.05–0.10 μg L −1 , owing to high enrichment factors (653–1007). The online in-tube SPME-HPLC–DAD method was verified for the determination of trace PAHs in environmental water samples, and acceptable recovery (70–118%) was achieved. The analytical methods also displayed some advantages in comparison with other reports. Moreover, the extraction tube exhibited satisfactory chemical stability. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Batteries-Basel
·
2022
·Vol. 8
·期 10
·161
·
IF 5.938
Han Wang,Sidra Jamil,Wenwen Tang,Jing Zhao,Hui Liu,Shujuan Bao,Yijun Liu,Maowen Xu
Due to the high theoretical capacity of 1675 mAh g−1of sulfur, lithium-sulfur (Li-S) batteries can reach a high energy density of 2600 Wh kg−1, which has shown fascinating potential in recent decades. Herein, we report the spiderweb-like nanocage (Co/Mel) as a novel sulfur host with a melamine-sacrificed pyrolysis method. The incorporation of embedded cobalt nanoparticles (Co NPs) in the tips of carbon nanotubes (CNTs) can catalyze polysulfide transformation kinetics. In addition, the nanocages form a conductive three-dimensional spiderweb-like network that facilitates electrolytic penetration and electronic/ionic transportation. Moreover, the porous internal nano-cavities not only improve sulfur loading levels but also provide buffer space for volume expansion during charging and discharging. As a result, the hollow Co/Mel polyhedra with a high content of sulfur (75.5 wt%) displays outstanding electrochemical performance with an initial discharge-specific capacity of 1425.2 mAh g−1at 0.1 C and a low decay rate of only 0.028% after 1000 cycles at 1 C.Keywords:lithium-sulfur batteries;pyrolytic synthesis;zeolite imidazolate framework;spiderweb-like nanocages;catalytic conversion
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Wei Cui,Xiangxuan Li,Xinyi Li,Tianyu Si,Lin Lu,Ting Ma,Qiuwang Wang
The development of phase change materials (PCMs) is hampered by issues like leakage , poor thermal conductivity , and poor light absorption . In this study, we innovatively combined modified melamine foam (MF) and graphene nanoparticle (GNP) to address these defects of PCMs in the solar-thermal energy system. The MF was modified to endow the solar-thermal energy conversion ability and superhydrophobic interface characteristics due to the polypyrrole (PPy) by the in-situ polymerization and the polymerized octadecylsiloxane (PODS) layer coating on the sponge skeleton. The composite PCMs consisting of the modified MF, paraffin wax (PW), and GNP were fabricated and exhibited good leakproof ability, high thermal conductivity, and excellent solar-thermal energy conversion capability. Results showed that due to the effects of the PPy and the PODS on the sponge skeleton structure, MF@PPy-PODS/PW composite PCMs showed a decrease in the mass loss ratio to less than 0.34% and an increase in the thermal conductivity of 0.33 W/m·K and the solar-thermal storage efficiency of 75.68%. Besides, adding GNP with higher concentrations impacted positively on the thermal conductivity and the solar-thermal energy conversion ability but negatively on the phase change enthalpies . MF@PPy-PODS/GNP3/PW composite PCMs increased the thermal conductivity to 0.59 W/m·K and the solar-thermal storage efficiency to 79.36% while decreasing the phase change enthalpy to 130.61 J/g. Furthermore, a thermoelectric conversion system driven by solar energy was developed to show the potential of composite PCMs for cleaner energy production. The open-circuit voltages of the MF@PPy-PODS/GNP3/PW composite PCMs achieved 0.78 and 0.91 V at 2 and 4 Sun, respectively. The open-circuit voltages remained for a period of time and slowly dropped without the simulated solar light irradiation. This study provided a potential strategy for the optimal performance of composite PCMs and their application in solar thermal systems .
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 10
·1766
·
IF 5.719
Qiong Jiang,Shuwu Zhang,Juanjuan Feng,Min Sun
To improve the extraction performance of the silica aerogel, a melamine-terephthalaldehyde polymer was used to hybridize silica aerogel, and the hybridized aerogel was coated on the surface of stainless steel wire to prepare a fiber-filled extraction tube through placing four wires into a polyetheretherketone tube. The tube was combined with high-performance liquid chromatography, then the online extraction and detection were established. Several polycyclic aromatic hydrocarbons (PAHs) were selected as the target analytes. Under the optimum extraction and desorption conditions, the limit of detection was as low as 3.0 ng L−1, and the linear range was 0.01–20.0 μg L−1. The enrichment factors of PAHs were in the range of 1724–2393. Three environmental water samples of mineral water, tap water and river water were analyzed by this method, and the recoveries that spiked at 1.0–10.0 μg L−1were between 80.5–126%. It showed many advantages compared with other methods, such as better sensitivity, faster detection and online analysis.Keywords:solid-phase microextraction;silica aerogel;melamine-terephthalaldehyde polymer;polycyclic aromatic hydrocarbons;online analysis
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）