JOURNAL OF HAZARDOUS MATERIALS
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2022
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IF 14.224
Ke Zheng,Wenxi Li,Shaoqi Zhou,Guoru Huang
Although polydopamine (PDA)-related modification is widely studied in the fabrication of superhydrophobic sponges, the high cost of dopamine limits its widespread application. To imitate PDA modification, a low-cost and facile one-step poly(phenol-amine) modification was performed on melamine sponges in this study. Low-cost catechol and diethylenetriamine (DETA) were used as the monomers , and n -dodecanethiol was used as an additive in the one-step modification. The results confirmed that the poly(phenol-amine) aggregations were successfully anchored on the sponge skeleton surface and that the aggregations were formed via the Schiff base reaction and the Michael addition reaction. Furthermore, the as-prepared sponges still showed excellent mechanical properties after modification. Additionally, the optimally modified sponge (MS-0.5) exhibited superhydrophobic properties with a contact angle value above 150° under various environments, high oil-absorption capacity for various oils and organic solvents, high continuous oil–water separation performance with efficiency greater than 98.8% in 30 cycles, outstanding demulsification performance with 99.52% toward oil-in-water emulsion, and excellent recoverability and long-term stability. Thus, this work provides a feasible facile one-step modification method that can be used in place of PDA-related modification.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Kun Ge,Qiyue Wu,Yonghui Li,Ying Gu
In this work, a hexagonal boron nitride (h-BN)/AuAg nanoalloy hybrids (NAHs) was synthesized to fabricate h-BN/Au 1 Ag 3 membrane as a solid surface-enhanced Raman spectroscopy (SERS) substrate for sensitive SERS detection of melamine. The AuAg nanoalloys were in situ grown on h-BN by chemical reduction method, and the Au/Ag molar ratio was tuned to achieve optimal SERS performance. After the SERS performance of h-BN/AuAg NAHs with different Au/Ag ratios was analyzed, h-BN/Au 1 Ag 3 NAHs were chosen for SERS analysis. The h-BN/Au 1 Ag 3 membrane can be obtained through simple filtration of h-BN/Au 1 Ag 3 NAHs on chromatographic paper. As expected, the solid SERS substrates of h-BN/Au 1 Ag 3 membrane were uniform and demonstrated good selectivity, repeatability and reproducibility for SERS detection of melamine. The results demonstrate that h-BN/Au 1 Ag 3 membrane exhibited high SERS activity for 4-mercaptobenzoic acid (4-MBA) with limit of detection (LOD) at 1.0 ng L −1 , and its analytical enhancement factor (AEF) reached 3.6 × 10 8 . The possible enhancement mechanism, including electromagnetic mechanisms (EM) and chemical mechanisms (CM) were illustrated by finite-difference time-domain (FDTD) and density functional theory (DFT) simulations in detail, respectively. The concentration of melamine in the 0.05–5.0 mg L −1 range showed good linear relationship ( R 2 = 0.9940) with SERS intensity with LOD of 0.01 mg L −1 . Finally, the recoveries of melamine in liquid milk samples are 87.7–105.7% with relative standard deviations (RSDs) in range of 0.6–2.6%, providing precise safety evaluation of melamine in milk samples.
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Journal of Energy Storage
·
2022
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IF 8.907
Nianben Zheng,Chenglong Zhang,Ruijin Fan,Zhiqiang Sun
Phase change material (PCM) based passive cooling techniques are attractive candidates for thermal management of lithium-ion batteries due to the merits of low energy consumption and low cost. However, the commonly used solid-liquid PCMs suffer from leakage and poor thermal conductivity , limiting their wide applications. Herein, we report a novel composite PCM (CPCM) with melamine foam (MF) as the supporting matric, lauric acid as the PCM, and aluminum nitride (AlN) as the thermal conductivity enhancer. The CPCM presents a good anti-leakage feature, and AlN increases the thermal conductivity of the CPCM by 54.17% with a mass fraction of 15%. As a result, the CPCM with 15% AlN shows the best thermal management performance that the maximum battery surface temperature and the temperature difference can be decreased by 24.96% and 83.97% at a 3 C discharging rate compared to those without CPCM. Further, the maximum battery surface temperature is within 47.74 °C, and the temperature difference is no more than 0.34 °C under the cycling discharge-charge tests. The findings of the present work open up new opportunities to develop high-performance and reliable CPCMs for the thermal control of lithium-ion batteries, especially at high discharging rates.
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JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Yuanxian Zeng,Lei Kang,Ying Wu,Shan Wan,Bokai Liao,Nan Li,Xingpeng Guo
Melamine modified carbon dots (Me-CDs) was synthesized by hydrothermal method and used as effective corrosion inhibitor for Q235 carbon steel in 3.5 wt% sodium chloride (NaCl) solution. The microstructure and surface properties of Me-CDs were characterized using XRD, FTIR, XPS and TEM. The corrosion inhibition behavior and mechanism of Me-CDs for carbon steel were investigated using weight loss and electrochemical methods, in combination with some surface characterizations (including SEM, AFM and contact angle tester). Results showed that Me-CDs as mixed-type adsorbent inhibitor could effectively prevent carbon steel from corrosion, and the maximum corrosion inhibition efficiency can reach 92.36% at 200 mg/L. The absorption of Me-CDs conformed to Temkin adsorption model, involving both chemisorption and physisorption . Based on the results of characterization analysis, the chemisorption from multiple adsorption centers, physisorption by blocking and barrier effect, and the formation of hydrophobic film on the surface of carbon steel was proposed to clarify the corrosion inhibition mechanism of Me-CDs.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Zehao Li,Hu Bai,Jielu Wei,Junjie Wang,Lili Kong,Xing Wang,Xiaodong Xia,Jinyou Duan
In recent years, graphitic carbon nitride (g-C 3 N 4 ) has been developed greatly in the domain of water treatment. We adopted one-step calcination to enhance the light absorption of g-C 3 N 4 with melamine-sponge (MS). A novel form of photocatalysts (gCNMx, x = 0.1, 0.2 and 0.3) were successfully prepared. The color of gCNMx changed with addition of MS. Experimental analysis demonstrated that C-doping and N vacancies increased the capacity of light absorption of gCNM0.2, and further increased efficiency of photothermal conversion and photogenerated holes. The sterilization efficiency of gCNM0.2 could rival a variety of metal photocatalysts. Moreover, the preparation of gCNM0.2 was cost-effective and environmental-friendly. Interestingly, the inactivation efficacy of gCNM0.2 for S. aureus depended heavily on the photogenerated holes, however, the decisive force toward S. typhimurium was photothermal conversion.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Qi Xia,Jinlong Hu,Qingqing Chen,Lingzhi Zhang
Selenium cathode attracts great attention due to its high theoretical volumetric capacity and better electrical conductivity than sulfur cathode. Herein, N/S co-doped microporous carbon (NS-K-PC) is designed and prepared as Se host by a spray drying process of the poly(styrenesulfonic acid)-melamine salt solution followed by carbonization and activation process. The as-prepared NS-K-PC shows a very high micropore contribution of 94.8% in the total surface area, and a total N/S heteroatom doping level of 2.5 wt% in the carbon matrix. The NS-K-PC/Se cathode delivers a high reversible capacity of 499.2 mA h g −1 at 0.1C, superior rate capacity of 324 mA h g −1 at 8C, and great cycling stability with a capacity decay of 0.081% per cycle over 500 cycles at 1C. Additionally, a comparative study demonstrates that NS-K-PC/Se cathode with the carbonate-based electrolytes exhibit better cycling stability than those with ether-based electrolytes primarily resulted from a direct solid–solid conversion of Se to Li 2 Se bypassing the formation of soluble polyselenides.
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RENEWABLE ENERGY
·
2021
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IF 8.001
Yu Du,Haowei Huang,Xinpeng Hu,Shuang Liu,Xinxin Sheng,Xiaolong Li,Xiang Lu,Jinping Qu
Phase change materials (PCMs) can effectively absorb and release energy from the environment during the phase transition process. However, liquid phase leakage and poor energy storage occur easily at the same stage. Considering the good adhesion of polydopamine (PDA) and the high solar absorption properties of PDA and MXene , a new supporting material was prepared in this work by combining melamine foam (MF) and MXene under the action of PDA, which was used to encapsulate polyethylene glycol (PEG) to prepare a composite PCM (CPCM). Then, we experimentally studied the thermal properties of this new material. The results show that the proposed PEG/MPMF CPCM (PEG@MPMF) exhibits good heat storage properties, and the melting enthalpy reaches 186.2 J/g, which is 99.5% of that of pure PEG. The light absorption of PEG@MPMF is improved by the conjugate action of PDA and MXene. Additionally, this CPCM maintains excellent shape stability and reusability after 100 thermal cycles. Therefore, the PEG@MPMF shows great advantages in terms of heat storage and thermal management.
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JOURNAL OF FLUORESCENCE
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2020
·Vol. 30
·期 6
·1463-1468
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IF 2.093
Xue Gao,Zhiying Ma,Xiuying Liu,Lijun Tang,Jianrong Li
Graphene quantum dots (GQDs), which have high photostability, anti-photobleaching and scintillation, good biocompatibility and low toxicity, are important member of the fluorescent material family, and have attracted extensive research interest. In this paper, a fluorescence resonance energy transfer (FRET) biosensor based on protoporphyrin IX (PpIX) and GQDs was developed for melamine detection. PpIX was bound to the surface of GQDs to produce self-assembled nanosensors, and a FRET process occurred between GQDs and PpIX. However, due to the combination of melamine and PpIX, the FRET process was shut down in the presence of melamine. The FRET system could quickly and accurately detect melamine with a detection range of 1.0 × 10 −8 to 2.0 × 10 −6 mol/L based on the fluorescence intensity ratio of PpIX and GQDs, and the detection limit was 3.6 × 10 −9 mol/L. This method obtained satisfactory results when it was employed to the determination of melamine in milk samples.
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JOURNAL OF CHROMATOGRAPHY A
·
2020
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IF 4.049
Muhammad Mujahid Ali,Zhiyuan Zhu,Mengyu Wang,Dilshad Hussain,Xia Gao,Jianfeng Wang,Zhenxia Du
Endogenous glycopeptides are significantly important in diverse pathological and physiological systems, but their direct analysis is severely hampered by their low abundance and presence of interfering species in biological fluids. In this study, we synthesized the amine-functionalized titanium metal-organic framework (NH 2 -MIL-125(Ti)) by a simple hydrothermal method, characterized and used for glycopeptides enrichment. The designed separation media is highly hydrophilic and stable which is suitable for hydrophilic interaction chromatography (HILIC). To make the process smooth, simple, reliable, and robust, NH 2 -MIL-125(Ti) crystals were packed in pipette-tip using hydrophilic melamine foam, as supporting frit. Free amine groups, present in the structure imparted hydrophilicity and a unique pattern of porosity, contributing to the size exclusion effect that excluded the large-sized proteins up to 1:700 peptide to protein ratio. The prepared MOF particles possessed regular porosity, high surface area, good hydrophilicity, and offered an in-tip flow-based set-up enhanced the enrichment performance for N -linked glycopeptides. The affinity material showed a detection limit of 1 fmol.µL −1 and selectivity up to 1:1000 (HRP digest to BSA digest). Moreover, repeatability and reusability were evaluated up to five rounds of enrichment using the same affinity tip, and scanning electron microscopic images revealed no structural changes in the MOF crystals. Finally, the MOF packed in pipette tip was applied to selectively capture the N- linked endogenous glycopeptides from a healthy saliva sample and 64 unique endogenous glycopeptides were identified. These results demonstrated the excellent potential of NH 2 -MIL-125(Ti) based affinity tip for glycopeptides which can be used to enrich trace glycopeptide biomarkers from the biological fluids.
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Environmental Technology & Innovation
·
2023
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IF 7.1
Siqi He,Sakil Mahmud,Zhu Xiong,Yiwen Shi,Jiangyan Lu,Yuhang Cheng,Wei Zhang,Li Yu,Gaosheng Zhang
In natural freshwater and wastewater environments, thallium (Tl) is an infrequent yet exceptionally toxic heavy metal, presenting a formidable peril to human health. The arsenal of substances accessible for Tl(I) adsorption encompasses biochar, activated carbon, metal oxides, and diverse materials. The adsorption capabilities of activated carbon and biochar are limited, while metal oxide materials are expensive and challenging to regenerate. Developing cost-effective materials with high selectivity for Tl(I) removal poses an ongoing challenge in material technology. In this investigation, a novel composite denoted as PB@PDA/PEI-MF has been successfully synthesized, comprising Melamine Foam (MF) co-supported with Prussian blue nanoparticles (PB NPs) via the incorporation of polydopamine (PDA) and polyethyleneimine (PEI). The PB@PDA/PEI-MF material demonstrates remarkable efficacy in the efficient sequestration of Tl(I) across a broad pH spectrum, ranging from 6 to 10. Moreover, even in the incidence of various coexisting metal ions (e.g., Na + , K + , or Ca 2+ ), the Tl(I) removal rate by PB@PDA/PEI-MF remains consistently high, exceeding or equal to 90%. Its high selectivity, anti-ion interference ability, and ease of recycling address the most prominent shortcomings of previous materials. Leveraging these advantages, the PB@PDA/PEI-MF material demonstrates exceptional proficiency in the remediation of real-world Tl(I)-contaminated Pearl River water, aligning with the stringent industrial wastewater standards. The conclusive outcomes affirm that PB@PDA/PEI-MF presents a viable technological solution for the effective removal of Tl(I) in intricate environmental contexts.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
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IF 8.7
Ziran Du,Cheng Zhou,Hao-Yang Mi,Heng Li,Ziwei Qin,Ruyan Xu,Yaming Wang,Chuntai Liu,Changyu Shen
High-performance electromagnetic interference (EMI) shielding materials with low reflection are urgently required due to secondary electromagnetic pollution. MXene-based shielding materials often encounter a dilemma of high reflectance due to the high conductivity and permittivity of MXene , Herein, ecoflex-encased gradient MXene-decorated melamine foams (eGMMFs) are proposed to achieve both ultra-low reflection and efficient shielding. By designing a gradual increased gradient MXene conductive network and a reflector of reduced graphene oxide , the eGMMF integrates the impedance matching layer, loss layer, and reflective layer, which contributes to a average shielding efficiency of 78.8 dB and an reflection coefficient (R) of 0.022 in the X-band. A recorded low R value of 3.84 × 10 -5 is obtained at 11.52 GHz, which prevails over previously reported MXene-based shields. Meanwhile, the developed eGMMF shows a remarkable piezoresistive sensing and anti-impacting performance. This work provides a new vision and guidance for editing both shielding and absorbing materials integrated with multifunctionality.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Xiaopeng Huang,Lingxiao Li,Xia Zhao,Junping Zhang
Interfacial solar-driven evaporation (ISE) is one of the most promising solutions for collecting fresh water, however, poor salt-resistance severely limits the long-term stability of solar evaporators. Here, highly salt-resistant solar evaporators for stable long-term desalination and water harvesting were fabricated by depositing silicone nanoparticles onto melamine sponge, and then modifying the hybrid sponge sequentially with polypyrrole and Au nanoparticles. The solar evaporators have a superhydrophilic hull for water transport and solar desalination, and a superhydrophobic nucleus for reducing heat loss. Spontaneous rapid salt exchange and reduction in salt concentration gradient were achieved due to ultrafast water transport and replenishment in the superhydrophilic hull with a hierachical micro-/nanostructure, which effectively prevents salt deposition during ISE. Consequently, the solar evaporators have long-term stable evaporation performance of 1.65 kg m -2 h −1 for 3.5 wt% NaCl solution under 1 sun illumination. Moreover, 12.87 kg m −2 fresh water was collected during consecutive 10 h ISE of 20 wt% brine under 1 sun without any salt precipitation. We believe that this strategy will shed a new light on the design of long-term stable solar evaporators for fresh water harvesting.
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