Journal of Cleaner Production
·
2021
·
IF 9.297
Hao Tang,Shu Zhang,Hongwei Pang,Jiaqi Wang,Xiangxue Wang,Gang Song,Shujun Yu
Radioactive pollutants have always been the top priority in wastewater, and searching a green and efficient treatment technology remains a significant challenge. In this study, a novel melamine sponge supported sulfurized nanoscale zero-valent iron (MS@S-NZVI) material with high dispersion was firstly designed to effectively capture U(VI) from water environment. The target material could retain its original structure in water due to the excellent mechanical strength of MS, which greatly inhibited the aggregation of S-NZVI. A series of characterization techniques, such as SEM, XRD , FTIR, TGA and XPS , had proved the effective synthesis and excellent structural properties of the MS@S-NZVI. The faster reaction equilibrium (<1 h) and higher maximum adsorption capacity (180 mg/g at pH = 5 and 298 K) exposed the perfect performance of target material in the elimination of U(VI). In addition, further researches in different water systems exhibited that MS@S-NZVI had a significant U(VI) removal rate in simulated wastewater systems. Finally, the removal process of MS@S-NZVI to U(VI) could be divided into three pathways through the XPS technique , adsorption and reduction were the main reaction mechanisms. This study provides a new insight into the utilization of melamine sponge and a prospect for the practical application of S-NZVI in the removal of radionuclide .
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JOURNAL OF POROUS MATERIALS
·
2019
·Vol. 26
·期 5
·1369-1375
·
IF 1.947
Guo Tan,Chen Rong,Wu Shimin,Zhang Lijing,Yun Shan,Zhang Jiadong,Li Yanxing,Li Huaju,Huang Aibing
In this work, melamine sponge (MS) reinforced methyltrimethoxysilane (MTMS)-based silica aerogels were fabricated via a sol–gel method followed by fast microwave drying. The aerogel composites with large size (20 × 20 × 2 cm) can be dried within 30 min. The MS/MTMS-based silica aerogel composites exhibit macro-pore structure, low density (95–178 kg m −3 ), excellent integrity and bending flexibility, together with high mechanical strength (Young’s modulus up to 4.787 MPa). Moreover, the superhydrophobicity with a contact angle as high as 164° and a low thermal conductivity of 0.033 W m −1 K −1 are demonstrated. Our work offers an effective method to fabricate high-quality aerogel composites as promising candidates for energy-saving applications.
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LANGMUIR
·
2026
·
IF 4.4
Wenhao Bao,Bizhi Lv,Linqiong Xu,Yaoxin Shao,Jinpeng Wang,Yongqing Zhao,Xinsheng Dou
A macroscopic P-ZIF-8/PDA/MF adsorbent was fabricated by substituting conventional zinc precursors with layered porous zinc oxide (P-ZnO) on polydopamine (PDA)-functionalized melamine foam (MF). The composite exhibited exceptional adsorption capacity for chlortetracycline hydrochloride from wastewater, with a Langmuir-modeled maximum of 1320 mg/g at pH 6. Systematic evaluation of environmental parameters─including pH gradients, ionic strength variations, and competitive ion interference─revealed robust performance under various aqueous conditions. In addition, FT-IR and XPS analyses were performed to characterize P-ZIF-8/PDA/MF both prior to adsorption and following the adsorption process in order to clarify its adsorption behavior. The analysis indicates that the uptake by P-ZIF-8/PDA/MF mainly proceeds through monolayer chemisorption, which results from the combined contributions of hydrogen-bond interactions, π–π stacking, and pH-dependent electrostatic attraction.
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PubMed
高影响因子
Science China-Technological Sciences
·
2026
·Vol. 69
·期 11
·2120106
·
IF 5.1
Li Hongyang,Guo Zelin,Liu Zhan,Nie Changda,Liu Xinjian,Rao Zhonghao
Leveraging the advantages of high heat storage density and stable phase transition temperature, phase change materials (PCMs) have become one of the primary approaches to achieving continuous supply of renewable energy. Due to the risk of PCM leakage and poor cyclic stability, the utilization of PCMs in industry is severely limited. Generally, porous materials are used for PCM encapsulation to prevent leakage. However, due to the poor interface compatibility between porous materials and PCMs, the composite materials suffer from incomplete PCM injection and low enthalpy value. This study used polydopamine (PDA)-modified melamine foam (MF) to improve the encapsulation of polyethylene glycol (PEG) to reveal the effect of molecular modification on the thermal performance of the composite PCMs. The results indicate that with increasing PDA modification time, the adsorption capacity of MF for PEG gradually improves, the leakage of MF-based PCMs is alleviated, and the enthalpy value increases. Furthermore, by altering the molecular weight of PEG, the strengthening effect of PDA molecular modification on the heat storage capacity of MF-based PCMs is verified, and this effect is universal for polyethylene glycol materials. This study reveals that molecular modification is useful in improving the interface compatibility and heat storage capacity of the porous-based phase change composites. It fills the gap in the analysis of the influence pattern and mechanism of molecular modification on the change of phase transition enthalpy.
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ChemSusChem
·
2026
·Vol. 19
·期 15
·e70941
·
IF 5.9
Rahmat Ullah,Jinshan Cheng,Sheraz Muhammad,Sumayya Khan,Huaifeng Li,Ali Aman,Ke Zhang,Tayirjan Taylor Isimjan,Shohreh Azizi,Xiulin Yang
Developing robust, efficient oxygen evolution catalysts is essential to advancing alkaline water electrolysis and sustainable hydrogen production. Herein, we present a vacancy-engineered MoO 2 /Fe 3 O 4 -Mel nanorod composite, grown on nickel foam via a one-step solvothermal strategy. The catalyst possesses abundant oxygen vacancies and strongly coupled MoO 2 /Fe 3 O 4 heterointerface, while the nitrogen-rich melamine framework promotes electronic modulation of Fe active centers. During electrochemical activation, it undergoes surface reconstruction to generate an FeOOH active phase and oxygen vacancies promote interfacial charge redistribution. These structural and electronic features accelerate charge transfer and facilitate the adsorption and conversion of oxygenated intermediates during oxygen evolution reaction (OER). As a result, the optimized MoO 2 /Fe 3 O 4 -Mel catalyst delivers ultra-low overpotential of 217 mV at 100 mA cm −2 , a small Tafel slope of 70 mV dec −1 , and maintains stable operation for 150 h. In situ Raman and in situ Fourier transform infrared spectroscopy reveal vacancy-associated surface reconstruction and dynamic oxygenated intermediate evolution, while tetramethylammonium and pH-dependent studies confirm an adsorbate evolution mechanism. A two-electrode MoO 2 /Fe 3 O 4 -Mel (+) ||Pt/C (−) electrolyzer achieves a low cell voltage of 1.45 V at 100 mA cm −2 with negligible degradation over 100 h. This work highlights the effectiveness of interfacial electronic modulation and oxygen vacancy engineering for high-performance alkaline OER catalysts. Graphical A vacancy-engineered MoO 2 /Fe 3 O 4 -Mel nanorod catalyst was synthesized and delivered good oxygen evolution reaction (OER) activity (217 mV@100 mA cm −2 ), long-term stability, and robust overall water splitting (1.45 V@100 mA cm −2 ). Operando spectroscopic studies reveal oxygen vacancy-assisted dynamic FeOOH reconstruction and active site modulation, while complementary chemical probing suggests that OER proceeds via an adsorbate evolution mechanism.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Xiaosheng Du,Yuanlai Fang,Xu Cheng,Zongliang Du,Mi Zhou,Haibo Wang
An innovative reactive phosphorus–nitrogen containing diamine, PNDA, was obtained by dehydration reaction between 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 4,4′-diaminobenzophenone (DABP). Then, flame-retardant nanoencapsulated n-octadecane (NanoC18) with PNDA-modified melamine–formaldehyde (MF) as shell was fabricated via in situ polymerization. n-Octadecane was successfully encapsulated in the PNDA-modified MF polymer shell and the diameter of NanoC18 ranged within 80–140 nm, as evidenced by scanning electronic microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. The thermal property and flame retardancy of NanoC18 were researched by thermogravimetric (TGA), differential scanning calorimetry (DSC), cone calorimetry measurement, and limiting oxygen index (LOI) test. DSC analysis indicated that NanoC18 exhibited a relatively high phase change enthalpy within the range of 110.8–141.3 J/g. The results of the combustion test indicated that the introduction of the phosphorus–nitrogen containing PNDA into NanoC18 considerably increased the LOI and residual weight of EP/NanoC18 composites, as well as suppressed the release of heat and smoke. Moreover, the thermal properties, thermal stability, and durability of NanoC18 were barely changed upon PNDA introduction into NanoC18. This nanoencapsulated n-octadecane with an excellent phase change properties and flame-retardant properties exhibits considerable potential for energy saving construction, thermoregulated textile and other thermal energy storage applications.
研究领域:
材料科学
·
热能存储
·
高分子化学
·
消防工程
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 9
Guijing Chen,Zhaoyang Song,Xiaoqi Wang,Shengchi Bai,Yi Deng,Quanxun Liang,Songmiao Liang,Alberto Tiraferri,Baicang Liu
New nanofiltration membrane with larger volume output is one of the key parameters for selection in drinking water treatment applications. Moreover, evaluating the separation performance of NF membranes is crucial for ensuring the continued safety of effluent water quality when responding to sudden changes in water quality. In this study, the melamine, a highly reactive monomer containing a triazine ring, participates in the interfacial polymerization reaction between the piperazine and 1,3,5-benzenetricarbonyl trichloride, thus providing an opportunity to tune the polyamide layer properties. The reaction with melamine changes the structural parameters and decrease the diffusion rate of piperazine, while introducing more intermolecular hydrogen bonds in new hybrid polyamide layer compared to the conventional polyamide layer. These strong intermolecular hydrogen bonds are crucial for enabling high Na 2 SO 4 rejection in melamine-modified membranes. This strategy resulted in membrane permeance of 2.5 times that of commercial membranes (VNF1 and NF270) and unmodified membrane in a complex mixed salts solution, with Cl − /SO 4 2‒ selectivity factor increasing form 7.5 to 44.6. Furthermore, the new membrane can remove most dissolved substances from ultrafiltration effluent in treating drinking water source (Hulukou Reservoir) impacted by sudden shale gas wastewater spill, ensuring the safety of the treated water. The purified water quality parameters are inferior to those of the VNF1 and NF270 membranes, but slightly superior to the unmodified membrane. However, water recovery experiments revealed that all membranes suffered from severe scaling issues. Overall, the results suggest that melamine may be utilized to tune the performance of nanofiltration membrane through the scalable one-step polymerization procedure, providing an effective strategy for preparing high-performance membranes.
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高影响因子
WATER AIR AND SOIL POLLUTION
·
2023
·Vol. 234
·期 12
·1-17
·
IF 2.9
Wang Tong,Yang AiGuo,Zhang JiuBing,Gan WeiJiang,Zhou Fan,Ran ZhaoJin,Wang ZhongMin
Pesticide residues in water can cause varying degrees of damage to the ecological system and human health, attracting widespread attention. During this research, a cost-effective, easily synthesized, and high surface area mesoporous poly (melamine–formaldehyde) (mPMF) was employed as an adsorbent to effectively absorb forchlorfenuron (CPPU) pesticide from water. The maximum adsorption capacity and maximum adsorption effectiveness were found to be 231.43 mg/g and 81%, respectively. The study of adsorption kinetics revealed that the adsorption mechanism conforms to a quasi-second-order kinetic model, indicating that chemical adsorption predominates, and the overall adsorption process is influenced by two or more factors. The adsorption isotherm experiment demonstrated that the adsorption mechanism is better described by the Freundlich model, suggesting that mPMF exhibits multi-layer heterogeneous adsorption of CPPU, involving both physical and chemical adsorption mechanisms. Additionally, mPMF showed the potential for cyclic regeneration through desorption after adsorbing CPPU from water, as its adsorption capacity remained largely unaffected even after four consecutive cycles.
研究领域:
环境科学
·
材料科学
·
化学工程
·
环境污染控制
·
水处理技术
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Long Cheng,Yongkang Zhang,Longlong Zhu,Hongmei Ge,Mingyu Wei
To overcome the limitations of conventional powder catalysts, such as recovery difficulty and aggregation, a three-dimensional polyimide-modified carbon nanotube/melamine sponge composite (PIC-MS) was fabricated via a freeze-drying process and applied for peroxymonosulfate (PMS) activation to degrade bisphenol A (BPA). Structural characterizations, including SEM, FT-IR, and XRD, confirmed the successful integration of polyimide-modified carbon nanotubes with the melamine sponge framework. By combining the high catalytic activity of polyimide-modified carbon nanotubes with the robustness and easy recoverability of the sponge structure, PIC-MS effectively addressed catalyst aggregation, deactivation, and separation challenges. The PIC-MS/PMS system achieved over 97 % BPA removal within 20 min and showed broad-spectrum degradation efficiency toward various organic pollutants. Moreover, the catalyst displayed excellent adaptability across a wide pH range (2.7–9.5) and preserved more than 87 % of its activity after six consecutive cycles, confirming strong stability and reusability. Mechanistic studies demonstrated that singlet oxygen ( 1 O 2 ) and superoxide radicals (O 2 •- ) were the dominant reactive oxygen species, with 1 O 2 playing the primary role. These species promoted sequential hydroxylation and oxidative ring-cleavage reactions, ultimately leading to complete mineralization of BPA into CO 2 and H 2 O. Quantitative structure-activity relationship (QSAR) analysis further indicated that the transformation products had much lower bioaccumulation factors than BPA, suggesting reduced environmental risk during degradation. This work highlights a sustainable strategy for constructing recyclable metal-free catalysts, offering promising prospects for advanced wastewater treatment.
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高影响因子
Analytical Methods
·
2016
·Vol. 8
·期 11
·2526-2532
·
IF 1.915
Juan Peng,Yun Feng,Xiao-Xia Han,Zuo-Ning Gao
A simple, sensitive and reliable electrochemical sensor was developed for detection of melamine based on gold nanoparticles deposited on a graphene doped carbon paste electrode. The sensor was characterized using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Melamine sensing is based on the interaction between melamine molecules and the gold nanoparticles causing suppression in the peak current. The decrease in the value of the current and the concentration of melamine showed a good linear relationship in the concentration range of 2.0 × 10−10 to 8.0 × 10−7 M and 8.0 × 10−7 to 8.0 × 10−3 M with the limit of detection (LOD) of 1.8 × 10−11 M. The proposed method was successfully applied in the quantitative determination of melamine in spiked milk and milk powder with RSDs of 0.09–3.16% and recoveries of 95.00–101.75%.
研究领域:
分析化学
·
电化学
·
食品安全
·
生物传感
·
纳米材料
·
环境监测
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高影响因子
ChemCatChem
·
2016
·Vol. 8
·期 12
·2128-2135
·
IF 4.724
Kui Li,Xin Xie,Wei-De Zhang
A facile strategy to synthesize porous graphitic carbon nitride with stacking nanotubes by thermal condensation of melamine–ammonium oxalate stacking sheets is reported. The photocatalytic generation rate of hydrogen over the porous graphitic carbon nitride (99.7 μmol h −1 ) is nearly 9.5 times as that of pristine g-C 3 N 4 (10.5 μmol h −1 ). Such enhancement is attributed to the large specific surface area (91.1 m 2 g −1 ), improved visible-light absorption and efficient separation of photogenerated electrons and holes. The strategy of preparing the porous graphitic carbon nitride with modified melamine as a precursor opens a new gate for the regulation of the morphologies of g-C 3 N 4 to get higher photocatalytic activity. Graphical Curled up : Porous graphitic carbon nitride nanotubes were prepared by thermal condensation of melamine–ammonium oxalate (MAO) stacking sheets, which display high and stable activity for photocatalytic generation of hydrogen through water splitting.
研究领域:
材料科学
·
光催化
·
纳米材料
·
能源化学
·
半导体催化
·
水裂解制氢
·
功能材料
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 13
·6342-6352
·
IF 3.3
Yang Zeng,Xin Liu,Yimo Zhang,Yan Qin,Xiangtao Tang,Wenqing Zhang,Lingfan Zhang
Numerous micro/nanoscale powdered adsorbents face the problems of poor reusability and difficult separation, which severely restrict their application in effluent treatment. How to effectively solve these problems is still a challenge. In this study, a chitosan–melamine sponge (CTS–MS) composite (CTS/MS = 3 : 2), as a promising adsorbent material with excellent regeneration, easy separation and high adsorption capacity, was tactfully prepared by crosslinking chitosan with a 3D melamine sponge. The obtained CTS–MS composite was employed to evaluate the adsorption properties towards Orange II (OII) anionic dye in wastewater. The characterization results indicated that the CTS–MS composite possessed macropores inside the sponge, which could facilitate the mass transfer of adsorbates from aqueous solutions, and chitosan was well distributed on the surface of the 3D melamine sponge. The adsorption data for OII demonstrated that the adsorption process could be described by the Sips isotherm model and the pseudo-second-order kinetic model, showing a maximum adsorption capacity of 712 mg g−1. The entire adsorption process was found to be spontaneous and endothermic in nature. More importantly, the new composite could be directly separated and desorbed effectively, and the adsorption efficiencies still remained over 99.10% after 10 cycles. Under optimal conditions, the adsorption equilibrium could be basically achieved within 10 min (50 mg L−1, 100 mL, dosage 64.4 mg), and it could be almost desorbed within only 10 s, which could facilitate the recycling of both the CTS–MS composite and the OII dyes. Besides, combined with the results of pH, FT-IR spectroscopy and XPS, the adsorption mechanisms were ascribed to the electrostatic attraction and hydrogen bonding between the CTS–MS composite and dye anions. It is believed that the new 3D CTS–MS composite is a very promising adsorbent for dyeing effluents.
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