INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Peng Liu,Ni Yuan,Wei Xiong,Hanyu Wu,Duoqiang Pan,Wangsuo Wu
β-Zeolite was synthesized and modified with ethylenediamine (EDA). The synthesized materials were characterized and used for the removal of nickel(II) from aqueous solutions. The influences of the pH, contact time, and temperature on nickel(II) adsorption onto synthesized β-zeolite and β-zeolite modified with ethylenediamine (β-zeolite–EDA) were studied by a batch technique, and X-ray photoelectron spectroscopy was employed to analyze the experimental data and identify the formation of coordination bonds between the adsorbents and nickel(II). The dynamic process showed that the adsorption of nickel(II) onto β-zeolite and β-zeolite–EDA matched the pseudo-second-order kinetics model, and the adsorption of nickel(II) was significantly dependent on the pH values. Through simulation of the adsorption isotherms by the Langmuir, Freundlich, and Dubinin–Radushkevich models, it could be seen that the adsorption patterns of nickel(II) onto β-zeolite and β-zeolite–EDA were mainly controlled by surface complexation and the adsorption processes were endothermic and spontaneous. The modification of β-zeolite–EDA improved the adsorption capacity of nickel(II) significantly; this shows a novel material for the removal of nickel(II) from the water environment for industrialized application.
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 Chemistry A
·
2015
·Vol. 3
·期 16
·8816-8824
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IF 7.443
Jinli Zhang,Yuyan Hai,Yi Zuo,Qian Jiang,Chang Shi,Wei Li
Novel polyamide thin film composite (TFC) nanofiltration (NF) membranes were prepared on polyetherimide supports by the interfacial polymerization of 1,2,4,5-benzene tetracarbonyl chloride and m-phenylenediamine followed by modification with ethylenediamine (EDA). The TFC NF membranes thus prepared were characterized by attenuated total reflection Fourier transform infrared (ATR-FTIR), solid-state nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS); these results indicated that by covalent bonding with EDA, the unstable carboxylic groups on the initially generated poly(amic acid) (PAA) TFC membrane surfaces were effectively transformed into polyamide, including the methylene group in the chemical structure chain, for preparing the PAA-cov-EDA NF membranes. At an operating pressure of 1.0 MPa, the PAA-cov-EDA NF membrane exhibits a glucose rejection of 90% at a flux of 25 L m−2 h−1, and a MgSO4 rejection of 76% at a flux of 31 L m−2 h−1, in particular demonstrating its superior chlorine resistance, after being immersed in a 200 ppm NaClO solution for 100 h. Such novel polyamide TFC NF membranes have the advantages of mild preparation conditions and high rejection towards low-molecular-weight organics, thus demonstrating their potential in the pharmaceutical industry.
研究领域:
材料科学
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环境工程
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化学工程
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DOI
高影响因子
MOLECULES
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2021
·Vol. 26
·期 4
·978
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IF 4.412
Peng Liu,Hui Ruan,Tiantian Li,Jiaqi Chen,Fuqiu Ma,Duoqiang Pan,Wangsuo Wu
The low cost β-zeolite and ethylenediamine modified β-zeolite (EDA@β-zeolite) were prepared by self-assembly method and used for Cu(II) removal from contaminated aqueous solution. Removal ability of β-zeolite toward Cu(II) was greatly improved after ethylenediamine (EDA) modification, the removal performance was greatly affected by environmental conditions. XPS results illustrated that the amide group played important role in the removal process by forming complexes with Cu(II). The EDA@β-zeolite showed desirable recycling ability. The finding herein suggested that the proposed composite is a promising and suitable candidate for the removal of Cu(II) from contaminated natural wastewater and aquifer.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Jiangwei Ma,Huiqing Fan,Zhexin Li,Yuxin Jia,Arun Kumar Yadav,Guangzhi Dong,Weijia Wang,Wenqiang Dong,Shuren Wang
The flexible room-temperature gas sensors are highly desirable to apply in wearable and portable equipment owing to their wearability. The research mainly focuses on the gas-sensing materials and few studies paid attention to the conjunction between flexible substrates and sensing materials. In this work, the polyethylene terephthalate (PET) fibers substrate is modified by ethylenediamine (EDA) to expose the amino group on the surface (PET-NH 2 ). This method is simple, cost-efficient, and easy to operate. The positively charged amino group could interact with negatively charged carboxyl (−COOH) of multi-walled carbon nanotubes (MWCNTs) by electrostatic attraction. The EDA treatment on PET effectively strengthens the connection between the flexible PET substrate and gas sensing materials with carboxyl as evidenced by SEM images. After the in situ polymerization process, the polyaniline (PANI) is successfully decorated on the MWCNTs. The fabricated PET-NH 2 -MWCNTs/PANI sensor exhibits strongly enhanced ammonia (NH 3 ) sensing performance as compared to the PET-MWCNTs/PANI sensor without the EDA treatment. The results suggest that the EDA treatment is an effective method to conjunct between flexible substrates and sensing materials, which shows great potential in the field of flexible gas sensors.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
CARBOHYDRATE POLYMERS
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2020
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IF 7.182
Rui-hong Liang,Ya Li,Li Huang,Xue-dong Wang,Xiao-xue Hu,Cheng-mei Liu,Ming-shun Chen,Jun Chen
Ethylenediamine-modified pectins (EPs) with different degrees of amidation (DA) were prepared and characterized by Fourier Transform Infrared spectra (FTIR), elemental analysis, X-ray photoelectron spectroscopy (XPS). The prepared EPs were then used to remove Pb 2+ from the aqueous solution. It was found that EPs with the highest DA (EP 48 ) exhibited great removal efficiency of Pb 2+ (≥94 %) at low concentrations of 40−80 mg/L. The zeta potential analysis showed that EP 48 had the fastest increase in zeta potential when Pb 2+ was continuously added and was the first to be electroneutralized. Particle size analysis further confirmed that EP 48 was the first precipitated and formed a larger EP 48 -Pb 2+ complex. The FTIR and XPS analyses indicated that Pb 2+ was adsorbed via the ion exchange of carboxylic groups and chelation with acylamino and amino groups. These results suggested that the EP 48 might be a promising adsorbent for the removal of low concentrations of Pb 2+ in contaminated water.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
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2018
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IF 2.21
Meng Li,Zipeng Xing,Jiaojiao Jiang,Zhenzi Li,Junyan Kuang,Junwei Yin,Ning Wan,Qi Zhu,Wei Zhou
In-situ Ti 3+ /S doped high thermostable anatase TiO 2 nanorods using ethanediamine-modified TiOSO 4 as precursor are synthesized under 700 °C calcination , then combined with controllable in-situ solid-phase reaction method, calcined at 350 °C in argon. The outcomes declare that the obtained photocatalyst with a high crystallinity is effectively doped with S element and Ti 3+ species, and synchronously possesses one-dimensional (1D) anatase nanorods structure with length of ∼ 2–5 μm and width of ∼0.5–1 μm. The S and Ti 3+ co-doped 1D nanorod with a narrowed bandgap (2.56 eV) stretches the optical response range to visible-light. The visible-light-driven photocatalytic degradation efficiency of methyl orange and H 2 production rate for Ti 3+ /S-TiO 2 nanorods are as high as 96% and 166 μmol h −1 g −1 , showing about 6 times greater than 600-TR (TiO 2 nanorods). This is be ascribed to the synergistic reaction of S and Ti 3+ species co-doping narrows the bandgap and promotes the separation efficiency of photoexcited carriers, and the one-dimensional structure favors the transportation of photogenerated charge carriers. Hence, the prepared photocatalyst will have a great latent application prospect in fields of energy and environment.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Ya Li,Xi-xiang Shuai,Ming Zhang,Fei-yue Ma,Jun Chen,Jian Qiao,Rong-hao Chen,Li-qing Du
As a common macromolecular carbohydrate, pectin has a strong affinity for Pb 2+ . An ethylenediamine modified pectin (EP 48 ) with 48 % of amidation was prepared and exhibited great removal efficiency towards Pb 2+ in our previous study. However, the EP 48 has drawbacks in adsorption including low mechanical strength and difficulty in separation. In this study, EP 48 was compounded with sodium alginate (Alg) and Fe 3 O 4 to synthesize EP 48 /Alg/Fe 3 O 4 microsphere. The physicochemical properties and Pb 2+ adsorption characteristics of microsphere were analyzed. It was found that the microsphere exhibited good thermal stability, mechanical strength, porous structure, as well as acid tolerance. The pseudo-second-order model well described the kinetics of adsorption process, indicating the chemical adsorption is dominant. The Langmuir model fitted the experimental data well, and the maximum adsorption capacity reached 175.19 mg/g. Adsorption-desorption experiments showed that the removal rate of the microsphere maintained over 98.9 % after 10 cycles. The X-ray photoelectron spectroscopy (XPS) analyses revealed that the potential adsorption mechanism included ion-exchange and chelation. The above results suggested its potential use for the removal of Pb 2+ from wastewater.
研究领域:
环境科学
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材料科学
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化学
✓ 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）