JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
·
IF 2.196
Li Zhang,Fangxiang Song,Yonggui Wu,Liang Cheng,Jin Qian,Shuai Wang,Qianlin Chen,Yan Li
In this study, the as-prepared spherical mesoporous silica was modified by amino and cyano groups via grafting, and the amino and carboxyl functionalized adsorption materials (MSS@NH2@COOH) were obtained after cyano group hydrolysis. The introduction of amino and carboxyl groups increases the surface active sites of the materials. The materials were characterized by SEM, TEM, XRD, N2 adsorption/desorption, XPS, etc. BET analysis revealed the amino and carboxyl functionalized mesoporous silica maintained their mesostructure nature and its specific surface area was 113 m2·g–1. TG-DTA and FT-IR confirmed effective grafting on the surface of mesoporous silica with functionalized groups. The simulated wastewater of Ni(II) was carried out to test the adsorption properties of the materials, and several influential factors (pH, initial nickel ion concentration, adsorbent dose) were discussed. The saturated adsorption capacity increased clearly from 46.55 mg·g–1 of MSS to 125.57 mg·g–1 of MSS@NH2@COOH. Even recycling three times, the removal rate of Ni(II) ions using MSS@NH2@COOH as an adsorbent could still be over 75%. Adsorption isotherms, kinetics, and thermodynamics of adsorption were taken to clarify the adsorption process. This newly developed adsorbent material does exhibit good reusable performance and effective removal of the heavy metal ions of Ni(II).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2016
·
IF 2.267
Qianqian Huang,Shunli Liu,Kewen Li,Imtiaz Hussain,Fang Yao,Guodong Fu
A facile method for the preparation of sodium alginate (SA)/carboxyl-functionalized graphene (G-COOH) composite hydrogel was developed. Based on the coordination ability of lanthanide ions to the carboxyl groups, a series of hydrogel derived from different ratios of SA and G-COOH was fabricated by neodymium (Nd 3+ ) ions coordination. A relatively uniform layered structure was recorded by SEM at the interior of SA/G-COOH hydrogel. Several parameters such as water content, swelling ratio (SR), tensile test and solvent resistance were also investigated. The SA/G-COOH composite hydrogel showed excellent mechanical strength , and the tensile strength of SA/G-COOH composite hydrogel reaches 53.72 MPa at high water content. Due to the coordination ability of Nd 3+ ions, the hydrogel also exhibited an excellent solvent resistance and stability.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 2
·383-392
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IF 1.967
Han Xingwei,Yu Wenjie,Zhang Lin,Li Hengye,Kong Fenying,Wang Wei
The functionalization of porous aromatic frameworks (PAFs) is essential for task-specific application of these materials as advanced adsorbents in water treatment. In this study, a carboxyl-functionalized PAF was prepared by the post-synthesis modification of a HOCH 2 -tagged PAF, which was synthesized from a precursor-designed method. The synthesized PAFs were comprehensively characterized. The targeted PAF-COOH showed hierarchical porosity with the coexistence of micropores and mesopores. The carboxyl groups were distributed homogeneously across the whole material, and its content was as high as 4.18 meq g −1 . An equilibrium adsorption isotherms study demonstrated that the adsorption of cationic dyes fitted well to the Langmuir model and the maximum adsorption capacities of methylene blue (b-MB) and phenosafranine obtained at pH 10 were 775.19 and 588.24 mg g −1 , respectively. The adsorption kinetics of cationic dyes followed the pseudo-second order kinetic model. Quick kinetics was demonstrated with the k 2 for a 100 mg L −1 b-MB solution as high as 2.83 g mg −1 min −1 and the equilibrium time was just 0.5 min. In addition, the dye-loaded PAF-COOH could be regenerated easily and showed excellent reusability. These significant characters indicated a promising prospect of the PAF-COOH for water treatment. Graphical abstract
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 17
·8130-8137
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IF 6.233
Jun Deng,Mingcong Sun,Jiyu Zhu,Changyou Gao
Protein adsorption influences greatly the performance of materials used in biotechnology and biomedicine. The binding of fibrinogen (Fg) to nanoparticles (NPs) can result in protein unfolding and exposure of cryptic epitopes that subsequently interact with cell surface receptors. The response and its degree are dependent on the size, charge, and concentration of the NPs. In this study the binding kinetics of human Fg to negatively charged 11-mercaptoundecanoic acid-functionalized gold nanoparticles (AuNPs–COOH) ranging from 5.6 to 64.5 nm were examined. The larger NPs bound Fg with a larger number of proteins per square unit and a higher dissociation rate (Kd′), but with decreased affinity. By contrast, the 5.6 nm AuNPs–COOH behaved in a cooperative manner for Fg adsorption. In the presence of excess Fg, only the 64.5 nm AuNPs–COOH showed severe aggregation, whose degree was alleviated in a dilute Fg solution. The Fg is adsorbed through a side-on configuration and both side-on and end-on configurations on the smaller (5.6 and 14.2 nm) and 31.5 nm AuNPs–COOH, respectively. It also retains the native conformation. By contrast, on the 64.5 nm AuNPs–COOH the Fg adopts the end-on configuration and loses most of the secondary structure.
研究领域:
生物化学
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纳米医学
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分子生物学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Min-Hui Zhang,Shu-Yu Bao,Ke Zheng,Hai-Li Sun,Ye-Jia Li,Xi-Can Li,Quan-Zhou Wu,Jian-Feng He
The high specificity of molecularly imprinted polymers (MIPs) in recognition is pivotal for their practical application. In this study, highly specific molecularly imprinted microspheres were prepared for cepharanthine (CEP) using a shielding strategy to mitigate non-selective adsorption sites within MIPs. Carboxyl-functionalized microspheres (CPMs) were initially fabricated as the support by copolymerizing octavinyl polyhedral oligomeric silsesquioxanes (OV-POSS), methacrylic acid (MAA), and methyl methacrylate (MMA) through suspension polymerization. Cepharanthine, serving as the template molecule,was adsorbed onto the CPMs via hydrogen bonding and electrostatic interactions. Subsequently, a thin imprinted layer was deposited onto the microspheres through cross-linking polymerization of MAA and ethylene glycol dimethacrylate (EDMA). The excessive carboxyl groups within the polymer matrix were shielded by forming an alkaline coating film via the oxidative self-polymerization reaction of dopamine (DA) and polyethyleneimine (PEI). After the removal of the CEP template, the shielded molecularly imprinted microspheres (SMIMs) exhibited a significantly higher adsorption capacity for CEP (330.42μmol g −1 ) compared to the corresponding non-imprinted microspheres, which had an adsorption capacity of only 2.93μmol g −1 . Selectivity studies demonstrated that the SMIMs exhibited superior recognition specificity for CEP and its structural analogs, with an imprinting factor of up to 133.06. Furthermore, the SMIMs were employed in solid-phase extraction for the specific separation of CEP directly from Stephania epigaea Lo extracts. The elution recoveries of CEP were in range of 98.3 %−103.5 % with relative standard deviation (RSD) of below 1.9 % (n = 3).
研究领域:
材料科学
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药物化学
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分析化学
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产品关联
DOI
高影响因子
IRANIAN POLYMER JOURNAL
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2017
·Vol. 26
·期 6
·423-430
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IF 1.422
Guo Ruibin,Qi Lei,Mo Zunli,Wu Qijun,Yang Shengrong
A new route to synthesize polyaniline (PANI)-grafted carboxyl-functionalized graphene (PGCG) composite material is established. In this paper, PGCG is first prepared through a two-step carboxyl-functionalized process. PANI can be grafted and grown on the surface of graphene due to the covalent bonding existing between the carboxyl-functionalized graphene and polyaniline. This method cannot only improve the mechanical performance and adaptive performance of polyaniline effectively, but also reduce the production costs and environmental pollution during the synthetic process. Therefore, a green and industrial synthetic process is achieved. X-ray diffraction (XRD) patterns, X-ray photoelectron spectroscopy (XPS) and Fourier transformed infrared (FTIR) all confirm that composite materials have been prepared successfully. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicate that the as-prepared PGCG has regular structure. Thermogravimetric analysis (TGA) indicates that the addition of graphene nanosheets can significantly improve the thermostability of PANI. Moreover, the as-prepared material exhibits superior electrochemical performance. As an electrode material for supercapacitors, PGCG possesses high specific capacitance of 158 F g −1 at a scan rate of 25 mV s −1 and 147 F g −1 at 50 mV s −1 in 1 M H 2 SO 4 . The Nyquist plot also confirms that the PGCG has low charge transfer resistance and good capacitive behavior. These great properties make PGCG a novel electrode material with potential applications in high-performance energy storage devices.
研究领域:
材料科学
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环境科学
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电化学
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2012
·Vol. 18
·期 43
·13642-13650
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IF 5.925
Jianping Yang,Dengke Shen,Xiaomin Li,Wei Li,Yin Fang,Yong Wei,Chi Yao,Bo Tu,Fan Zhang,Dongyuan Zhao
Graphical One step at a time : Carboxyl-functionalized upconversion phosphors have been successfully synthesized with a facile one-step hydrothermal approach by using a small-molecule binary acid as capping agent (see figure). This is an environmental friendly and facile approach to the large-scale synthesis of carboxyl-functionalized upconversion materials with controlled phases, shapes, and sizes. In this paper, we report a facile one-step hydrothermal method to synthesize phase-, size-, and shape-controlled carboxyl-functionalized rare-earth fluorescence upconversion phosphors by using a small-molecule binary acid, such as malonic acid, oxalic acid, succinic acid, or tartaric acid as capping agent. The crystals, from nano- to microstructures with diverse shapes that include nanospheres, microrods, hexagonal prisms, microtubes, microdisks, polygonal columns, and hexagonal tablets, can be obtained with different reaction times, reaction temperatures, molar ratios of capping agent to sodium hydroxide, and by varying the binary acids. Fourier transform infrared, thermogravimetric analysis, and upconversion luminescence spectra measurements indicate that the synthesized NaYF 4 :Yb/Er products with hydrophilic carboxyl-functionalized surface offer efficient upconversion luminescent performance. Furthermore, the antibody/secondary antibody conjugation can be realized by the carboxyl-functionalized surfaces of the upconversion phosphors, thus indicating the potential bioapplications of these kinds of materials.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
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2015
·Vol. 27
·期 9
·2221-2229
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IF 2.138
Yancai Li,Shuqing Feng,Yanmei Zhong,Yuhui Li,Shunxing Li
Carboxyl functionalized graphene (CFG) self-assembled monolayers (SAMs) were constructed on the carboxylated glassy carbon electrode based on covalent interaction for simultaneous determination of hydroquinone (HQ) and catechol (CC). Scanning electron microscopy and electrochemical impedance spectroscopy results proved that the CFG SAMs was successfully formed with enhanced conductivity. According to electrochemical voltammetry experiments, the modified electrode showed excellent sensitivity and selectivity for HQ and CC. Under optimal conditions, the sensing platform showed wide linear response for HQ and CC with detection limit of 0.2 µM ( S/N =3) and 0.6 µM ( S/N =3), respectively. Moreover, the sensor also displays good reproducibility and stability.
研究领域:
分析化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2012
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IF 1.58
Xiaoqing Wang,Li Yu,Jingjing Jiao,Huina Zhang,Rui Wang,Hui Chen
A series of novel COOH-functionalized imidazolium-based surface active ionic liquids (SAILs), N-alkyl-N′-carboxymethyl imidazolium bromide ([N-C n , N′-CO 2 H-Im]Br, n = 10, 12, 14), was synthesized. Their aggregation behavior in aqueous solution was investigated by surface tension and steady-state fluorescence measurements. From surface tension data, a group of micellization parameters was obtained. Compared with 1-alkyl-3-methylimidazolium bromide ([C n mim]Br) bearing the same hydrocarbon chain, [N-C n , N′-CO 2 H-Im]Br exhibits considerably lower critical micelle concentration (cmc) and surface tension at cmc (γ cmc ), higher adsorption efficiency ( pC 20 ) and effectiveness of surface tension reduction ( π cmc ), indicating the incorporation of carboxyl group favors micelle formation. The average aggregation number (N agg ) values of [N-C n , N′-CO 2 H-Im]Br, determined by fluorescence quenching method, are slightly different from those of [C n mim]Br. The effect of temperature on the aggregation behavior of [N-C 12 , N′-CO 2 H-Im]Br was also studied. It is found that there exists a minimum cmc at nearly 38 °C, which is higher than that of [C 12 mim]Br.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2022
·
IF 4.601
Shengdong Pan,Zhiping Huang,Chunqing Shang,Li Wang,Qiaoli Qiu,Zemin Xu,Dandan Zhang
In cases of low concentration paraquat (PQ) poisoning, as the disease progresses over a long period of time, the prototype PQ may not be detected in the urine, which has a significant negative impact on the precise treatment of the poisoning. But PQ poisoning can also be confirmed by the detection of specific metabolites of PQ in the urine samples. In the present study, core-shell amphiphilic carboxyl-functionalized magnetic polymer microsphere (Amphiphilic-MPs-COOH) was prepared, and the as-prepared Amphiphilic-MPs-COOH was characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and thermogravimetry and differential thermogravimetry analyses (TG-DTG). Then, the Amphiphilic-MPs-COOH was employed as a magnetic solid-phase extraction (MSPE) adsorbent for pretreatment and rapid determination of PQ and its four metabolites from urine samples prior to ultra-high performance liquid chromatography-high resolution mass spectrometry (UPLC-HRMS). The extraction-elution conditions of Amphiphilic-MPs-COOH towards PQ and its metabolites were optimized in spiking urine samples to obtain the best MSPE efficiency. The adsorption mechanism of PQ and its metabolites by Amphiphilic-MPs-COOH involves electrostatic attraction and π-π stacking interactions. Moreover, the effect of different ratios of hydrophilic monomer NVP and functional monomer 4-VBA on the extraction and purification performance of PQ and its metabolites in urine samples. And the results revealed that both hydrophilic monomer and functional monomer were important for the adsorption of PQ and its metabolites, and the addition of the appropriate amount of the hydrophilic monomer NVP can improve the compatibility of the adsorbent with the urine substrate. In addition, this study compared the matrix effect of the Amphiphilic-MPs-COOH based MSPE method and the commercial Waters Oasis WCX SPE method. The results showed that the Amphiphilic-MPs-COOH based MSPE method developed in this paper had better resistance to matrix interference. Under optimal conditions, the recoveries of PQ and its metabolites were ranging from 84.5 to 103%, with relative standard deviations (RSDs) of 1.1–6.3%. While the limits of detection (LODs, S/N ≥ 3) and limits of quantification (LOQs, S/N ≥ 9) of the method were in range of 0.1–1.6 μg/L and 0.3–4.8 μg/L, respectively. Finally, the established MSPE-UPLC-HRMS method in this study was used to confirm PQ poisoning not only based on detecting PQ prototype, but also on its four metabolites, providing strong technical support for clinical precision treatment.
研究领域:
分析化学
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毒理学
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临床医学
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产品关联
DOI
PubMed
高影响因子
RADIATION PHYSICS AND CHEMISTRY
·
2023
·
IF 2.9
Yu Wang,Yue Wang,Chen Liu,Xin Yuan,Jing Peng,Jiuqiang Li,Maolin Zhai
Carboxyl groups exhibit great potential in the field of heavy metal decontamination due to their good coordination ability. In this work, acrylic acid was grafted onto covalent organic framework (COF) by using a γ-ray radiation grafting approach. A carboxyl-functionalized adsorbent designated AA-TbDa-COF with high performance for multiple heavy metal removal was obtained. Infrared spectroscopy and thermogravimetric analysis proved the successful carboxyl modification. The porous nanofiber morphology and high accessibility of carboxyl functional groups give the resultant AA-TbDa-COF ultra-fast adsorption kinetics. The capacity for Pb 2+ , Cd 2+ and Cu 2+ decontamination was 127.9, 60.6 and 39.8 mg/g, respectively. The preparation of functional COFs by radiation method is extended to the field of heavy metal treatment, proving the great potential of radiation-prepared materials in environmental governance.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2019
·
IF 3.858
Hui-Ling Duan,Qi-Le Niu,Jun Wang,Shi-Yao Ma,Jing Zhang,Zhi-Qi Zhang
Lysozyme is widely used in medical, food and industrial fields due to its bacteriolytic effect and thus it is significant to design and develop a specific adsorbent with high adsorption capacity and selectivity for lysozyme. Inspired by the high uptake capacity of tetrafluoroterephthalonitrile-crosslinked porous β-cyclodextrin polymers (P-CDPs) and the noncovalent interaction between lysozyme and carboxyl groups, the carboxyl-functionalized P-CDPs (P-CDP-COO − ) were synthesized by base-catalysed hydrolysis of nitrile group in P-CDPs to carboxyl. Porous structure, large extent of carboxylic functional groups, cyclodextrin's preventing aggregation, and negatively charged make P-CDP-COO − possess an outstanding adsorption capability for lysozyme. The maximum saturated adsorption capacity reaches 1520 mg g −1 , which is much better than the parent polymer and other reported materials. The as-prepared material was successfully utilized for the selective extraction of lysozyme from egg white.
研究领域:
生物化学
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材料科学
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食品科学
✓ 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）