TALANTA
·
2018
·
IF 4.244
Xiaojuan Liu,Ningning Xu,Panpan Gai,Feng Li
Since melamine is a strong hazard to human health, the development of new methods for highly sensitive detection of melamine is highly desirable. Herein, a novel fluorescent biosensing strategy was designed for sensitive and selective melamine assay based on the recognition ability of abasic (AP) site in triplex towards melamine and signal amplification by Mg 2+ -dependent DNAzyme. In this strategy, the melamine-induced formation of triplex DNA was employed to trigger the strand displacement reaction (SDR). The SDR process converted the specific target recognition into the release and activation of Mg 2+ -dependent DNAzyme, which could catalyze the cleavage of fluorophore/quencher labeled DNA substrate (FQ), resulting in a significantly increased fluorescent signal. Under the optimal conditions, the fluorescent signal has a linear relationship with the logarithm of the melamine concentration in a wide range of 0.005–50 μM. The detection limit was estimated to be 0.9 nM (0.1ppb), which is sufficiently sensitive for practical application. Furthermore, this strategy exhibits high selectivity against other potential interfering substances, and the practical application of this strategy for milk samples reveals that the proposed strategy works well for melamine assay in real samples. Therefore, this strategy presents a new method for the sensitive melamine assay and holds great promise for sensing applications in the environment and the food safety field.
研究领域:
生物化学
·
食品安全
·
分析化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 30
·13329-13339
·
IF 3.591
Dong Wang,Yang Wang,Xuhui Zhang,Ting Li,Mingliang Du,Mingqing Chen,Weifu Dong
Bio-based flame retardants (FRs) have drawn increasing attention for FR polylactide (PLA). Hence, a green and facile method was presented in this work for the synthesis of melamine phytate (MPA), melamine copper phytate (MPACu), melamine zinc phytate (MPAZn), and melamine magnesium phytate (MPAMg). In general, the PLA/MPAZn composite exhibited a better flame retardancy and smoke suppression with an acceptable mechanical property. With the addition of 20 phr MPAZn, the peak of heat release rate (PHRR) was decreased by 45.0% compared with that of neat PLA. Also, TSR of the PLA/MPAZn composite was the lowest among the FR PLA composites in this study. Furthermore, the higher quality char residues played the key role in the synergistic flame retardancy and smoke suppression for the PLA/MPAZn composites. In addition, in this work, we found that the mass loss rate (MLR) was highly related to the heat release rate (HRR).
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 16
·7924-7931
·
IF 3.269
Aiping Gao,Yiran Li,Haiting Lv,Dan Liu,Na Zhao,Qianqian Ding,Xinhua Cao
In this study, a new gelator containing lenalidomide and cholesterol groups was synthesized, which could form stable gels in 1,4-dioxane and mixed solvents of DMF/H2O (v/v, 1/1). The self-assembly process was studied and certified by field emission scanning electron microscopy, UV-vis, IR, XRD, and CA. Based on the results obtained from the abovementioned analyses, the self-assembly structure, aggregation pattern, and surface wettability could be tuned via the addition of melamine due to intermolecular hydrogen bonding between compound 1 and melamine (MA). The irregular lumpy and the closely packed fiber structures could be turned into microbelt and sparse fiber structures after the addition of MA, respectively. Moreover, the hydrophobicity of the xerogel film of 1-MA was obviously increased. The mechanical strength of gel 1-MA was obvisously enhanced due to the addition of MA. The UV-vis, IR, and XRD experiment results showed that the self-assembly process and mode of 1 was changed due to the addition of MA through intermolecular hydrogen bonding between 1 and MA. Therefore, these results provide a method for the regulation of the self-assembly process via intermolecular noncovalent interaction.
研究领域:
化学
·
材料科学
·
生物医学
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yaxue Zhang,Jihong Fu,Wenxia Xue,Guoqi Liu,Ronglan Wu
Hydrophobic sponges have attracted significant interest in oil spills and water–oil separation as potential absorption materials due to their desirable absorptivity, selectivity, and elasticity. In this paper, a hydrophilic melamine sponge (MS) is transferred into a superhydrophobic sponge via polydimethylsiloxane (PDMS) modification followed by in situ growth of fluorine-functionalized covalent organic framework (denoted as TFA-COF) nanoparticles. Therefore, the PDMS@TFA-COF@MS sponge was successfully prepared for efficient oil–water separation. The resultant PDMS@TFA-COF@MS exhibits superhydrophobic properties with a water contact angle of 156.7°. The superhydrophobic sponge has selectivity adsorption for different organic solvents and oils from water as well as oil–water separation efficiency (96% after 30 cycles) and oil absorption capacity (12 646% after 30 cycles). Meanwhile, the PDMS@TFA-COF@MS sponge exhibits strong thermal stability and flame retardancy in addition to having exceptional resistance to chemical corrosion in acidic, alkaline, and salt solutions. Moreover, the surfactant-stabilized oil-in-water emulsion could be efficiently separated by the sponge. Therefore, the prepared superhydrophobic PDMS@TFA-COF@MS sponge demonstrates possible uses for long-life oil–water separation applications.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Heng Wang,Lei Wang,Xu Lu,Xuqing Wang,Han Shen,Yuge Xu,Yixin Miao,Cheng Hu,Feng Zhang,Fudong Zhu
A monolithic porous carbon is prepared from agar/melamine sponge composite hydrogel. • The prepared porous carbon is compressible. • The prepared monolithic carbon exhibits outstanding capacitive performance. • The proposed synthetic strategy offers an effective route to monolithic porous carbons. High-performance electrode materials are crucial for advancing supercapacitor technology. Herein, a monolithic porous carbon material is synthesized using an agar/melamine sponge (AG/MS) composite hydrogel as the precursor. The composite hydrogel is fabricated by exploiting the unique gelation behavior of agar. Through subsequent freeze-drying and high-temperature carbonization, a self-standing porous carbon monolith is obtained. The pore structure of the agar/melamine sponge derived carbon is modulated via KOH activation. The resulting monolithic porous carbon (denoted as KAMC) features a hierarchically porous structure and a substantial specific surface area of 1570.3 m 2 g −1 . Electrochemical evaluation in a 3 M KOH electrolyte reveals that the KAMC electrode delivers a high specific capacitance of 364.2 F g −1 at 1 A g −1 . Moreover, it exhibits exceptional rate performance, retaining 92.3% of its capacitance when the current density is increased to 10 A g −1 . A symmetric quasi-solid-state supercapacitor assembled with two KAMC electrodes achieves an energy density of 9.80 Wh kg −1 , demonstrating the material's potential for high-performance energy storage applications. This work provides a straightforward and effective approach for preparing monolithic carbon-based electrode suitable for advanced supercapacitors. Download: Download high-res image (143KB) Download: Download full-size image
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产品关联
DOI
高影响因子
LANGMUIR
·
2026
·
IF 4.4
Qidong Wang,Jie Chen,Haibin He,Hua Wang,Yaofeng Zhu,Chen Qian,Yangyang Li,Shuai Wang
The development of 3D hydrophobic porous adsorbents for oil/water separation that are inexpensive, easy to fabricate, highly efficient, and physically and chemically durable continues to be a major research focus and a critical issue to be addressed. In this study, a facile and universal wettability transition strategy of amphiphilic melamine sponge (MS) was developed via simple dip-coating MS in rare earth ion solutions, taking Ce ion as a representative example. The formation of abundant coordination bonds between Ce ions and nitrogen atoms on a MS skeleton effectively decreased the sponge’s surface energy and tailored its microtopography and roughness, which collectively endowed the Ce ion-modified sponge (Ce-MS-10) with excellent hydrophobicity, as evidenced by a water contact angle of 143.1°. Owing to its ultrahigh porosity (>99%) and excellent oil/water selectivity, the Ce-MS-10 sponge exhibited a maximum oil adsorption capacity of up to 171.7 g/g. Meanwhile, as a result of its well-preserved mechanical elasticity from the MS sponge, Ce-MS-10 facilitated efficient oil/water separation through simple physical manipulation and can be reused repeatedly, as evidenced by its stable adsorption performance and excellent recyclability. The high stability of the coordination bonds formed between Ce ions and N atoms in the MS framework also enabled the Ce-MS-10 sponge to retain robust hydrophobic stability under various harsh physical (friction, adhesion, and oscillation) and chemical (strong acid or base, salty condition, and chemical solvents) surroundings, further validating its potential for practical application in real-world water remediation. In addition, the broad applicability of this facile Ce ion-based hydrophobization strategy for MS was further demonstrated with other commonly used rare earth element ions (La3+, Pr3+, Nd3+, and Y3+). The present study facilitates an ultrafacile strategy to fabricate MS-derived hydrophobic oil adsorption sponge to realize efficient and durable oil/water separation.
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产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jian-Wu Xiao,Li-Wang Jiang,Yu-Ma Yang,Zi-Kun Lin,Ze-Wu Xie,Shao-Xin Bei,Fu-An He
In this work, novel MnO2–Fe3O4/melamine (MA) sponges have been prepared for oil–water separation. First, MnO2 nanorods were synthesized by a hydrothermal method and their morphology could be controlled by different reaction conditions. Next, the as-prepared MnO2 nanorods were used alone or in combination with Fe3O4 nanoparticles to obtain hydrophobic MA sponges by surface modification with the assistance of silane coupling agents and/or Sylgard 184 adhesive. The realization of the high roughness and the coating with a low surface energy material for surface-modified MA sponges were mainly confirmed by SEM and FTIR, respectively, which were two key factors for the enhancement of hydrophobicity. All investigated MnO2/MA and Fe3O4/MA sponges were hydrophobic but with the water contact angles (WCAs) lower than 150°, while the WCAs of MnO2–Fe3O4/MA sponges could reach or exceed 150° under suitable preparation conditions achieving superhydrophobicity, which was attributed to the improved roughness. Both MnO2/MA and MnO2–Fe3O4/MA sponges had good oil–water separation ability by direct adsorption and gravity filtration, and their adsorption capacities for different oils were measured to be 37–50 g g−1 and 35–67 g g−1, respectively. Additionally, the saturation magnetization of the MnO2–Fe3O4/MA sponge could reach as high as 17.3 emu g−1, which is beneficial for the magnetic control operation during oil–water separation application.
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Huijuan Zou,Weibing Zhang,Qihuang Wu,Taici Huang,Wei Xu,Xinxin Xi,Yanling Cheng,Huatay Lin
In this study, a series of hierarchical porous Al 2 O 3 with controlled morphology were synthesized using melamine foam (MF) as a sacrificial template. Comprehensive characterization through XRD, FTIR, Raman spectra, SEM, TEM, and N 2 adsorption-desorption confirmed the successful fabrication of graphite skeleton-guided hierarchical porousAl 2 O 3 by precise control of calcination temperature. The hierarchical porous Al 2 O 3 materials calcined at 1000 ℃,1400 ℃, and 1500 ℃ demonstrated unique structural features and higher positive Zeta potential, exhibiting remarkably fast adsorption kinetics and exceptional Congo red (CR) adsorption capacities that significantly surpassed previously reported values in literature. The adsorption process followed pseudo-second-order kinetics, indicating chemisorption as the dominant mechanism. Furthermore, the adsorption isotherm was best described by the Langmuir model, suggesting monolayer adsorption behavior. These findings demonstrate that our cost-effectively fabricated hierarchical porous Al 2 O 3 represents a highly promising adsorbent for efficient removal of organic dyes from wastewater.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2025
·
IF 8
Shuangmei Liu,Siqi Liu,Jiawei Wang,Jiangwei Ren,Yongxiang Li,Hui Mao
The presence of metronidazole (MNZ) in medical wastewater poses a potential threat to environmental safety and people's health. Herein, we report an innovative strategy to fabricate a recyclable bayberry tannin (BT)-functionalized melamine foam (MF)-supported nanoscale zero-valent iron (MFBT-Fe 0 ) catalyst for efficient MNZ degradation in medical wastewater. The through-pore structure of MF reduced mass transfer resistance in heterogeneous systems, while the amphiphilic BT stabilized nZVI via steric hindrance and chelating interactions and created a high-concentration MNZ microenvironment through hydrophobic combined with hydrogen bonding. The synergistic design overcame the long-standing challenges of mass transfer limitations in heterogeneous systems, nZVI aggregation- and shedding-mediated activity degradation, and the establishment of high-concentration microenvironments for MNZ reductive transformation. Consequently, the highly accessible nZVI catalyst, MFBT-Fe 0 , rapidly removed MNZ, achieving a 96.4 ± 0.82 % removal rate within 90 min, with a degradation capability 2.9-fold higher than the non-BT-functionalized MF-Fe 0 . MFBT-Fe 0 exhibited exceptional cycle stability, maintaining an MNZ removal rate of up to 80 % after 6th cycles. Mechanistic studies revealed contributions from surface complexation, hydrogen bonding, and π-π stacking, with HPLC-MS confirming degradation pathways of nitro reduction, denitrification and hydroxyethyl cleavage. This work provides a sustainable, high-performance catalyst for practical MNZ removal, addressing both efficiency and recyclability challenges in medical wastewater treatment.
研究领域:
环境科学
·
化学工程
·
催化
·
水处理
·
纳米技术
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Hongxia Zhang,Yaozhong Ran,Zhenyu Zhou,Fei Xiao
With the continuous increase in energy demand and the growing severity of environmental issues, oily wastewater has become one of the key sources of pollution. In this study, through the in-situ polymerization reaction of trimethylolpropane trimethacrylate (TMPTMA), acrylic acid (AA), and perfluorooctyl acrylate (PFA), a fluoropolymer (FP) layer was directly constructed on the surface of commercial melamine sponge (MS), successfully preparing the hydrophobic MS@FP sponge. By adjusting the ratio of TMPTMA to PFAc, the content of the fluoropolymer layer on the MS surface can be effectively controlled. This fluoropolymer layer significantly improves the interfacial properties of the sponge and reduces its surface energy, with the static water contact angle of the MS@FP-2 sponge reaching as high as 151°. In addition, the adsorption performance, acid and alkali resistance, and oil-water separation performance of the MS@FP sponge were systematically investigated. The results show that the MS@FP-2 sponge maintains excellent hydrophobicity in strong acid and alkali solutions, demonstrating good chemical stability. The sponge can achieve continuous and efficient separation of chloroform-water mixtures, and the surface fluoropolymer layer is stable, with separation efficiency remaining above 95 % after multiple cycles of separation. The MS@FP-2 sponge, with its outstanding hydrophobic and oleophilic properties, chemical stability, and recyclability, holds broad application prospects in the field of complex industrial wastewater treatment.
研究领域:
环境科学
·
材料科学
·
高分子化学
·
表面工程
·
水处理技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Long Chen,Yankun Guo,Peiyu Cui,Zexin Lin,Junlong Yao,Syed Ali Raza Naqvi,Yimin Sun,Yani Guo
s Polyphenol-amine exhibits strong adhesive properties, attributed to its structural similarity to dopamine. In this study, Polyphenol-amine formed from low-cost catechol and diethyltriamine (DETA) as monomers, was blended with hydrophobic agents, including n-dodecyl mercaptan, stearic acid, and ferric oxide, to form soaking agents. Using a facile and environmentally friendly dip-coating method with commercial melamine sponges (MS) as templates, two types of sponges were fabricated: a hydrophobic superoleophilic sponge (PCAD/MS) and a magnetic superhydrophobic superoleophilic sponge (SA/Fe 3 O 4 @PCA/MS). Both modified sponges exhibit exceptional oil absorption capacities, ranging from 74 to 152 g/g and 63–118 g/g for various oils and organic solvents, high oil–water separation efficiency (＞99.1 % and ＞99.5 %), respectively. Additionally, they demonstrate excellent resistance to acidic, alkaline, and saline conditions, remarkable recyclability, and effective demulsification performance. Notably, the magnetic SA/Fe 3 O 4 @PCA/MS could be remotely actuated for continuous oil-water separation, enhancing its potential for large-scale oil spill cleanup and industrial wastewater treatment. Compared with conventional polydopamine- or fluorine-based coatings, this method provides a greener, more economical, and scalable solution for the fabrication of high-performance oil-absorbent materials.
研究领域:
材料科学
·
环境工程
·
化学工程
·
纳米技术
·
表面化学
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产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2014
·Vol. 38
·期 1
·87-92
·
IF 2.594
Tingting Wang,Yiming Zhu,Junfeng Ma,Rongrong Xuan,Haoqi Gao,Zhen Liang,Lihua Zhang,Yukui Zhang
In this work, an ampholine-functionalized hybrid organic–inorganic silica sorbent was successfully used to extract melamine from a milk formula sample by a hydrophilic interaction solid-phase extraction protocol. Primary factors affecting the extraction efficiency of the material such as extraction solvent, elution solvent, sample loading volume, and elution volume have been thoroughly optimized. Under the optimized hydrophilic solid-phase extraction conditions, the recoveries of melamine spiked in milk formula samples ranged from 86.2 to 101.8% with relative standard deviations of 4.1–9.4% ( n = 3). The limit of detection (S/N = 3) was 0.32 μg/g. The adsorption capacity toward melamine was 30 μg of melamine per grams of sorbent. Due to its simplicity, rapidity and cost effectiveness, the newly developed hydrophilic solid-phase extraction method should provide a promising tool for daily monitoring of doped melamine in milk formula.
研究领域:
分析化学
·
食品安全
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DOI
高影响因子
危险品化学品经营许可证（带存储）