JOURNAL OF CRYSTAL GROWTH
·
2020
·
IF 1.632
Lang Sun,Xintong Xu,Dalin Sun,Jiaqi Chen,Shaowen Chu,Wentao Shi,Shuangchen Ruan
We report effects of crystallization conditions and gel composition on the hydrothermal synthesis of large zinc-doped AlPO 4 -15 (ZnAlPO 4 -15) single crystals by using melamine (MA) as structure directing agent (SDA). By optimizing the following synthesis conditions: amount of MA, molar ratio of ZnO/Al 2 O 3 , molar ratio of P 2 O 5 /Al 2 O 3 , crystallization temperature and duration, the pure phase of ZnAlPO 4 -15 (size up to 95 μm) with good optical transparency can be obtained at 200 °C with 40 h in the system of Al 2 O 3 :1.07MA:0.27ZnO: 1.15P 2 O 5 :667H 2 O. To the best of our knowledge, it is the first report of synthesizing ZnAlPO 4 -15 by using MA as SDA.
研究领域:
材料科学
·
无机化学
·
晶体生长
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xiao-Ru Zhao,Xia Xu,Xin-Yu Jiang,Jie-Teng,Jin-Gang Yu
Self-assembly of three-dimensional graphene oxide-melamine (GO-ME x:y ) composites with various GO-to-ME mass ratios (x:y) of 5:1 to 25:1 was carried out by a facile hydrothermal method. GO-ME was characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The adsorption properties of GO-ME toward rare earth elements (REEs), phenols and dyes in aqueous solutions were investigated. It was found that REEs could be better adsorbed onto GO-ME 20:1 with maximum adsorption capacities of 25.04, 14.08, 20.88, 19.96, 26.68 and 25.28 mg g – 1 toward La 3 + , Y 3 + , Yb 3 + , Er 3 + , Eu 3 + and Nd 3 + , respectively. And GO-ME 15:1 showed relatively higher adsorption capacities of 65.77, 70.11 and 23.49 mg g – 1 for 3-nitrophenol, p-nitrophenol and hydroquinone, respectively. Organic dyes could be preferably adsorbed by GO-ME 10:1 , and its maximum adsorption capacities toward neutral red (NR) and alizarin yellow R (AYR) were 80.49 and 189.33 mg g – 1 , respectively. In brief, GO-ME x:y nanocomposites were expected to be used as efficient sorbents for the adsorption removal of REEs, phenols and organic dyes.
研究领域:
环境科学
·
材料化学
·
吸附技术
·
纳米复合材料
·
水处理
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jian Huang,Yibin Xu,Xiaoyi Zhang,Zhiwen Lei,Chen Chen,Yonghong Deng,Chaoyang Wang
Here a highly porous melamine sponge based matels absorbent (MF-PEI/CS 2 ) possessing abundent imine and dithiocarbamate groups was prepared via a simple two-step process including crosslinking reaction with polyethylenimine (PEI) under the assistance of epichlorohydrin and esterification with CS 2 under a basic condition. The combination of melamine sponge with large surface area and polyethylenimine and dithiocarbamate groups with strong metals chelating ability into one composite ensures MF-PEI/CS 2 sponge an excellent multi-metals removal performance. This monolithic product, which is easily separated from treated water, can quickly chelate amounts of metals in a short time as its absorption capacity reaches about 96% of the saturation absorption capacity (93 mg/g) in 25 min and reach the saturation point (97 mg/g) after 35 min without stirring toward Cu (II) ions.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Shaolin Yang,Jinze Li,Cheng Zhen,Fangfang Li,Simiao Sha,Chunping Hou,Hui Lu,Jiandong Wu,Zhilin Sheng,Jinfu Ma
To achieve oil/water separation using both absorption and filtration regardless of the oil/water density relationship, the super-hydrophilic/underwater super-oleophobic graphene oxide coated melamine sponge (GO@MS) and super-hydrophobic/super-oleophilic reduced graphene oxide coated melamine sponge (rGO@MS) were prepared via dip-coating of graphene oxide (GO) sheets onto melamine sponge (MS) and subsequent chemical reduction, respectively. The structures of the GO@MS and rGO@MS were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), Raman spectra , and X-ray diffraction (XRD). Both GO@MS and rGO@MS can preserve their original wettability in harsh environments containing acidic, alkaline, saline, and hot waters . The GO@MS and rGO@MS show excellent capability for selective absorption of water and oil respectively, with high capacities of 72.3–136.5 g g −1 and excellent recyclability . The compressed GO@MS and rGO@MS also exhibit high separation efficiency of about 99% and ultra-high permeation flux above 1.62 × 10 5 L m −2 h −1 for separating different oil/water mixtures containing light and heavy oils through filtration driven by gravity, respectively. Furthermore, a bidirectional separation setup assembled with the compressed GO@MS and rGO@MS was constructed, which demonstrates high efficiency for continuously separating different oil/water mixtures of any oil density.
研究领域:
材料科学
·
环境工程
·
纳米技术
·
表面化学
·
分离科学
✓ 已验证
DOI
高影响因子
JOURNAL OF FORESTRY RESEARCH
·
2013
·Vol. 24
·期 4
·741-746
·
IF 0
Zhang Ming,Xu Yang,Wang Shu-liang,Shi Jun-you,Liu Chang-yu,Wang Cheng-yu
We improved the overall performance of fast-growing poplar by utilizing a low-cost, effective and simple method. The fast-growing poplar was modified by a vacuum-pressure impregnation method with three types of modification solutions composed of phenol-melamine-formaldehyde (PMF) co-condensed resin, diatomite, and 3-aminopropyl (diethoxy) methylsilane. We measured the weight percent gain (WPG), bulking, leaching, anti-swelling efficiency (ASE), water-repellent effectiveness (WRE), and oxygen index of the modified specimens. All of the wood physical properties, which are beneficial for human uses, were significantly improved by the treatment. We improved various characteristics of wood and the oxygen index of poplar above 48.6% after the modification using diatomite and PMF co-condensed resin.
研究领域:
材料科学
·
木材科学
·
复合材料
·
表面工程
·
高分子化学
✓ 已验证
DOI
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Lingrui Zhang,Jinling Xie,Xuan Luo,Xiaobo Gong,Meng Zhu
Oil and organic solvent spills have caused serious environmental issues. To address these issues, several novel materials have been developed for the efficient separation of oil/organic solvents from water. In this study, ZIF-8 was loaded onto a melamine foam (MF) skeleton a simple in situ growth method. ZIF-8/MF was modified via a shell-ligand-exchange reaction (SLER) to improve its hydrophobicity. The prepared D-ZIF-8/MF exhibited strong hydrophobicity, with a WCA of 145.1° and an OCA of 0°. D-ZIF-8/MF can absorb up to 68–165 times its weight in oil/organic solvents. D-ZIF-8/MF also exhibited excellent stability, corrosion resistance, recovery, and recyclability. Furthermore, D-ZIF-8/MF has a high oil-water separation efficiency for absorbing organic solvents through a continuous oil-water separation device. This study provides a novel strategy for the preparation of strong hydrophobic foams via surface modification and SLER for oil-water separation. It has immense potential for the scale-up practical treatment of oily wastewater.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 21
·e53875
·
IF 3
Lei Li,Rui Chen,Fengyu Wen,Yashu He,Lin Cheng,Jierun Ma,Jianxin Mu
Oily wastewater has caused serious damage to the human health and ecological environment. It is urgent to develop novel materials for high performance oil/water separation. Porous melamine sponges (MS) are considered as an ideal matrix material for oil/water separation. Herein, molybdenum sulfide (MoS 2 ) modified with tannic acid (TA) and octadecylamine (ODA) was attached to MS framework via a facile dip-coating method. This novel and eco-friendly MS@(MoS 2 @ODA) sponge displays superior superhydrophobicity (WCA = 156.2°) and oil/water separation ability (absorption capacity = 113–145 g g −1 ). MoS 2 @ODA not only enhances surface roughness of MS framework, but also raises its specific surface area, causing an increase in the oil adsorption capacity of MS. Moreover, the composite sponge exhibited excellent chemical and mechanical stability. It is envisioned that this work can demonstrate a facile synthesis strategy for producing environmental friendliness MS with stable superhydrophobicity for high-efficient oil/water separation.
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 6
·期 1
·1-9
·
IF 11.806
Wu Yufeng,Wu Jianbo,Lin Yan,Liu Junchen,Pan Xiaolong,He Xian,Bi Ke,Lei Ming
In recent years, due to the development of flexible electronics, flexible sensors have been widely concerned and applied in intelligent robots, brain-computer interfaces, and wearable electronic devices. In this paper, we propose a low-cost and high-efficiency sensor component preparation method. The sensor component tetrathiafulvalene-tetracyanoquinodimethane/melamine sponge (TTMS) takes a melamine sponge as a flexible substrate. And the sponge is metallized with the tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ) which is an organic conducting molecule to construct a conductive pathway. The physical load approach is used to ensure the advantages of low cost and efficient manufacturing. TTMS can withstand 8000 compression cycles which exhibits its good mechanical stability. And 1000 cycles of cyclic voltammetry scanning proved it also had good electrical stability. TTMS can distinguish pressure changes of 100 Pa and respond quickly to pressure application and release. The TTMS can be assembled to form an array of sensors that can distinguish the position and intensity of pressure. Therefore, the excellent performance of the sensor is expected to promote the commercial application of the piezoresistive sensor.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FIRE SCIENCES
·
2023
·
IF 1.9
Chenran Fan,Lijuan Wei,Shicheng Zhao
To improve the flame retardant efficiency of intumescent flame retardants, some nano-scale additives as synergists were always added. In this work, nano silicon and piperazine pyrophosphate/melamine polyphosphate into polypropylene was investigated, which was obviously efficient to improve thermal stability and flame retardancy. The optimal synergistic ratio corresponded to 1 wt% SiO2, 10 wt% piperazine pyrophosphate, and 5 wt% melamine polyphosphate. The system passed the UL-94 V-1 classification and had a limiting oxygen index value of 34.5%. It exhibited a decrease on peak heat release rate and peak smoke production rate by 81% and 80%, respectively. Based on characterizations of scanning electron microscope, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy, the synergistic mechanism was investigated. A reactive cross-linking network between SiO2 and piperazine pyrophosphate/melamine polyphosphate during burning was formed to enhance the structure of carbon protective layer. Nano silicon acted as a foaming nucleating agent to promote the formation of porous dense carbon layer in intumescent flame retardants during burning. The synergistic strategy of SiO2 and piperazine pyrophosphate/melamine polyphosphate provided new compounded system for the design of polymeric materials with excellent flame retardancy, great thermal stability, and low release of heat and smoke.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2023
·
IF 8.8
Yichang He,Yiquan Liao,Bin Zhang,Ruiqi Xu,Ye Ma,Minggang Zhao,Hongzhi Cui
Melamine added to milk powder can lead to kidney injury and even death, but rapid detection is still hard due to the strong interference of milk powder solution. Herein, the CC/CeO 2 /CNPs mesh was constructed to detect melamine by using the photo-enhanced barrier effects on electrochemical response. Schottky barrier was regulated effectively to produce electrochemical response to melamine by photo-induced electrostatic interaction, which exhibited strong resistance to interference in milk powder solution. Sensitivity was enhanced by nearly 5 times and the lowest detection limit was reduced as low as 0.274 nM. The obtained high recovery (100%-104%) and good stability in milk powder solution indicated the good potential for practical applications. It provides a new opportunity for achieving strong resistance to interference by using the photo-enhanced barrier driving effect on electrochemical response.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Huiran Jin,Xinyu Zhou,Yawei Gu,Chenye Dai,Shan Yun,Ping Mao,Guofeng Guan,Jing Chen
Melamine formaldehyde (MF) foams, although widely used in heat insulation and as flame retardants due to their unique combination of low thermal conductivity and high flame retardancy, are prone to rapid collapse, which is extremely dangerous. Herein, we report a hydrophobic composite foam with a hierarchical structure. This foam was prepared through in situ incorporation of palygorskite and sodium alginate (Pal-SA) composite aerogels into the MF foam via the ambient pressure drying method and then through methyltrimethoxysilane (MTMS) chemical vapor deposition. The composite foam exhibited high-temperature thermal stability, excellent flame retardancy, and low smoke emission (2.5 m2/m2), which is ∼17 times lower than that of the pure MF. The foam prepared in the present work has excellent application prospects in offshore oil-spill treatment, high-temperature insulation, and flame retardancy. Moreover, the results of this work may provide guidance for developing low-smoke flame-retardant materials.
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2023
·Vol. 69
·期 11
·e18192
·
IF 3.7
Guanglu Xia,Jianhao Qiu,Dingliang Dai,Lu Zhang,Yong Tang,Jianfeng Yao
A series of covalent organic frameworks (COFs) with β-ketoenamine linkages named TpTt-COF, TAPT-COF, and TpPa-1 were constructed for photocatalytic H 2 O 2 generation in pure water and ambient air under visible light. Among them, TpTt-COF performed striking H 2 O 2 yield of 2647 μmol L −1 , which is 3.5, 17.5, and 176.5-fold those of TAPT-COF, TpPa-1, and bulk g-C 3 N 4 , respectively, attributing to the electron-deficient trait, short charge diffusion distance, and the narrowest bandgap of TpTt-COF. Additionally, to achieve the facile recovery, TpTt-COF was firmly and evenly anchored on melamine sponges (MS) because plenty of amino groups on the surface of MS could be involved in the β-ketoenamine formation and guide the synthesis of TpTt-COF on MS. The corresponding H 2 O 2 evolution over this photocatalyst monolith is also respectable and can be well repeated at least four times. This work is quite instructive for photocatalyst construction based on covalent organic frameworks and facile photocatalytic applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）