INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Maijun Li,Yubo Long,Zhibo Zheng,Xu Hu,Siwei Liu,Zhenguo Chi,Nanwen Li,Jiarui Xu,Yi Zhang
Chemical modification of polyimide membranes is employed to achieve “trade-off” breakthrough or improve the plasticization resistance in CO2 separation. However, harsh reaction conditions restrict the application of traditional chemical modifications. In this work, a simple chemical modification method─the coordination cross-linking between hydroxyl groups on polyimide (6FSPI) and Zn(II)─was investigated. Because of the reversible complexation of Zn(II) in the modified membrane as a transport carrier with CO2, and the addition of Zn(II) disrupts coiled chain of spiro moiety or intrachain cross-linking to induce more quantities of ultrafine micropores, the CO2 permeability coefficient of the modified membrane is 2.97 times that of the pristine 6FSPI. Simultaneously, there is improvement in diffusion selectivity of the modified membrane, resulting in the CO2/CH4 selectivity improvement. The overall CO2/CH4 separation performance of the modified membrane reaches up to the 2008 Robeson limit. In addition to serving as facilitated transport carriers, Zn(II) can also be used as cross-linking points. The modified membrane maintains a stable CO2 permeability coefficient beyond 4000 kPa. Our work suggests that the Zn(II) coordination cross-linking is a facile chemical modification method that can enhance long-term performance and separation performance of polyimide membranes simultaneously.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2022
·Vol. 76
·期 5
·2875-2882
·
IF 2.146
He Xiao-Ling,Huang Fu-Hui,Zhang Chun-Ming,Dong Zhen,Wang Bin-Quan
The larynx is an important organ of human speech, and patients with laryngeal cancer may face great pain of losing their functions. For the prevention and therapy of laryngeal carcinoma, two new Zn(II)/Cd(II) coordination polymers, namely [Zn 3 (L) 2 (4,4′-bipy)] n ·2n(DMF) ( 1 ) and [Cd 3 (L) 2 (bpp 2 ) n ·2n(H 2 O)·2n(DMF) ( 2 ) (H 3 L = 4,4′,4′′-ticarboxytriphenylamine, 4,4′-bipy = 4,4′-bipyridine, bpp = 1,3-bis(4-pyridyl)propane, DMF = N,N-dimethylformamide), were prepared. The treatment and protection activity of the new compounds against the laryngeal carcinoma was evaluated in this research, and the corresponding mechanism was explored at the same time. Firstly, CCK-8 assay was conducted to measure the inhibitory activity of compounds on the viability of laryngeal carcinoma cells. Additionally, the expression of miR-223-3P in MSC exosomes was also measured by real time RT-PCR assay.
研究领域:
肿瘤学
·
药理学
·
生物化学
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 38
·57823-57834
·
IF 5.19
Yi Shuang,Bao Binqin,Song Weifeng,Liu MuDdan
In this study, L-methionine and nano-Fe 3 O 4 were encapsulated and cured on sodium alginate by the ionic cross-linking method to form magnetic composite gel spheres (SML) as an adsorbent for the removal of Zn(II) from water. The influence of adsorbent dosages, pH, reaction time, and initial ion concentration on the ability of the gel spheres to adsorb Zn(II) was investigated, and the adsorption mechanism was identified. The experimental results showed that under the optimum conditions (pH = 5, t = 60 min, dosage of SML is 0.7 g·L −1 ), the maximum amount of Zn(II) adsorbed by the adsorbent gel spheres reached 86.84 mgˑg −1 . The reaction process of this adsorbent fits well with the Langmuir and pseudo-second-order kinetic models and is a heat absorption reaction. The adsorbent would preferentially adsorb Pb(II), and the adsorption efficiency of Zn(II) decreased when the concentration of interfering ions increased in the coexistence system. Further mechanistic research showed that this magnetic composite adsorbent is a mesoporous material with superior adsorption performance, and the amino and carboxyl groups on it react with Zn(II) via ligand chelation; the ion exchange effect of Ca(II) also plays a role. The adsorption amount of Zn(II) was maintained at a higher level after 5 cycles, and the loss of Fe was approximately 0.2%. In summary, SML, which is environmentally friendly, efficient, and recyclable, is an ideal adsorbent for Zn(II) removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 11
·2570
·
IF 5
Dan Wang,Lin-Huan Du,Long Li,Yu-Meng Wei,Tao Wang,Jun Cheng,Bin Du,Yi Jia,Bao-Yi Yu
Coordination polymers (CPs) are organo-inorganic porous materials consisting of metal ions or clusters and organic linkers. These compounds have attracted attention for use in the fluorescence detection of pollutants. Here, two Zn-based mixed-ligand-bearing CPs, [Zn2(DIN)2(HBTC2−)2] (CP-1) and [Zn(DIN)(HBTC2−)]·ACN·H2O (CP-2) (DIN = 1,4-di(imidazole-1-yl)naphthalene, H3BTC = 1,3,5-benzenetricarboxylic acid, and ACN = acetonitrile), were synthesized under solvothermal conditions. CP-1 and CP-2 were characterized by single-crystal X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, elemental analysis, and powder X-ray diffraction analysis. Solid-state fluorescence analysis revealed an emission peak at 350 nm upon excitation at 225 and 290 nm. Fluorescence sensing tests showed that CP-1 was highly efficient, sensitive, and selective for detecting Cr2O72−at 225 and 290 nm, whereas I−was only detected well at an excitation of 225 nm. CP-1 detected pesticides differently at excitation wavelengths of 225 and 290 nm; the highest quenching rates were for nitenpyram at 225 nm and imidacloprid at 290 nm. The quenching process may occur via the inner filter effect and fluorescence resonance energy transfer.Keywords:coordination polymers;fluorescence sensing;d10metal;CP;sensing ions;sensing pesticides
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 9
·3308-3319
·
IF 3.269
Qiang Jia,Yinxian Peng,Jianming Pan,Xiaobin Huang,Xiangheng Niu,Tao Zhang
Magnetic microspheres (Fe3O4@PVIM@Zn(II)) composed of a high magnetic-response Fe3O4 core and a Zn(II)-immobilized cross-linked polyvinyl imidazole (PVIM) shell via reflux-precipitation polymerization and metal-ion affinity strategy were fabricated. Integrating the advantages of specific uptake and fast separation, Fe3O4@PVIM@Zn(II) was adopted as an ideal pathway for luteolin (LTL) recognition. As-prepared Fe3O4@PVIM@Zn(II) possessed core–shell structure, uniform size (200 nm), high magnetic responsiveness (32.6 emu g−1), and a very easy synthesis process. X-ray photoelectron spectroscopy (XPS) suggested a strong interaction between the nitrogen heterocyclic ring of PVIM and Zn(II), which produced abundant binding sites for LTL. The batch mode experiments can be well described by pseudo-first-order kinetic models and a Langmuir isotherm. A rapid binding equilibrium (within 45 min) and large monolayer adsorption capacity (23.92 mg g−1) at 298 K were also observed. In addition, Fe3O4@PVIM@Zn(II) displayed remarkable selectivity to LTL; the purification process using Fe3O4@PVIM@Zn(II) can make purified LTL from approximately 85% to 94.26%. The antibacterial activity of purified LTL was outstanding by means of a Staphylococcus aureus (ATCC29213) resistance experiment. Considering its multiple merits, Fe3O4@PVIM@Zn(II) exhibited great potential for specific binding with natural products, such as flavonoids.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2017
·
IF 2.538
Shuangzhen Guo,Pengpeng Jiao,Zhigang Dan,Ning Duan,Jian Zhang,Guanyi Chen,Wubin Gao
A novel l -arginine modified magnetic bioadsorbent (Fe 3 O 4 -CS-L) was fabricated to remove Zn(II), Cd(II) and Pb(II) from aqueous solution by adsorption method. Several techniques such as FT-IR, SEM, XRD, TGA and VSM were used for characterizing the Fe 3 O 4 -CS-L. The results showed that the Fe 3 O 4 -CS-L was successfully prepared. Batch experiments were conducted to investigate the parameters affecting the adsorption of the novel magnetic bioadsorbent to metal irons, such as adsorption isotherm and adsorption kinetics. The adsorption equilibrium was commendably described by pseudo-second-order model. Langmuir model was better than Freundlich model to describe adsorption isotherm data and the predicted maximum adsorption capacities of Zn(II), Cd(II) and Pb(II) were 256.41 mg/g, 156.99 mg/g and 128.63 mg/g, respectively. Competition adsorption results showed that the adsorption order of Fe 3 O 4 -CS-L to metal ions was Pb(II) > Zn(II) > Cd(II). Moreover, regeneration studies suggested that Fe 3 O 4 -CS-L has a good recyclability. All the results showed that Fe 3 O 4 -CS-L could be a promising material in environment pollution cleanup.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2014
·Vol. 25
·期 3
·535-543
·
IF 1.077
Zhou Yong-Hong
Three new multi-dimensional coordination polymers, namely, [Cd(SIP)(HBPP)(BPP) 0.5 (H 2 O)·H 2 O] n ( 1 ), [Zn(L)(BIB) 0.5 ] n ( 2 ), and {[Cd 2 (L) 2 (BIB) 2 ](H 2 O) 7 } n ( 3 ) (H 3 SIP = 5-sulfo-1,3-benzenedicarboxylate, BPP = 1,3-bis(4-pyridyl)propane, H 2 L = 4-oxyacetate-benzoic acid, and BIB = 1,4-bis(imidazol-1-yl)-butane), were hydrothermally synthesized by self-assembly of the flexible N-donor ligand and the polycarboxylate ligands. Single crystal X-ray analyses reveal that complexes 1 – 3 possess different structural features. The Cd(II) atom in complex 1 is seven-coordinated by two bidentate chelating carboxylate groups and two nitrogen atoms as well as one water molecule. The adjacent Cd(II) atoms are bridged by two carboxylate groups to form 1D chains running along different directions, which are connected by BPP ligands to generate 2D network. The resulting 2D networks are further linked by hydrogen-bond interactions, affording a 3D supramolecular architecture. In complex 2 , the [Zn 2 (COO) 4 ] units are bridged by L 2− ligands to generate 1D double chain structure and then linked by BIB ligands to give 2D grid framework. In complex 3 , the [Cd(L 2 )] n and [Cd(BIB)] n helixes are alternately arranged, leading to the formation of a 2D bilayer structure.
研究领域:
无机化学
·
材料科学
✓ 已验证
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 11
·6849-6859
·
IF 3.917
Wang Aili,Li Shuhui,Chen Hou,Hu Yanping,Peng Xiong
Abstract The adsorption of heavy metal ion Zn(II) from industrial wastewater by performing environmentally benign methods is particularly important. In this study, a novel microcrystalline cellulose-based polymeric bio-sorbent (MCC- g -polyIL), which contained specific poly(ionic liquid) structure and adsorption performance for Zn(II), was in situ ARGET ATRP-synthesized within ionic liquid microemulsions. The ionic liquid microemulsions were characterized by phase formation capacity and dynamic light scattering results, and the prepared MCC- g -polyILs were characterized by FTIR, 1 HNMR, and TG/DSC analyses. The optimization of the adsorption process indicates that both the molar ratio of double ionic liquids and the dosage of the adsorbent affected the adsorption capacity of MCC- g -polyILs toward Zn(II).
The research on adsorption kinetics and adsorption isotherms further reveals that the adsorption process follows the pseudo-second-order kinetic model and the Freundlich adsorption isotherm model. The designed MCC- g -polyILs exhibited enhanced adsorption capacity, which indicates promising practical applications for the removal of Zn(II) from industrial wastewater.
Graphic abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shi-Ming Li,Hong-Chan Jiang,Qing-Ling Ni,Liu-Cheng Gui,Xiu-Jian Wang
Ethane (C 2 H 6 ) and ethylene (C 2 H 4 ) have similar physical and chemical properties, which are critical and difficult for the separation of C 2 H 6 /C 2 H 4 mixtures in the petrochemical process. Traditional C 2 H 4 -selective adsorbents can separate the C 2 H 6 /C 2 H 4 mixtures, but need further desorption treatment to obtain pure C 2 H 4 production. On the contrary, high-pure C 2 H 4 can be prepared in one step by C 2 H 6 -selective porous material. Herein, we present a caged metal-organic framework ( GNU-2 ) based on Zn (II) clusters, which has advantageous adsorption sites and cavity pockets for the reverse capture of C 2 H 6 from C 2 H 6 /C 2 H 4 mixtures. At 298 K and 1 bar, high C 2 H 6 uptake (5.10 mmol g −1 ) and C 2 H 6 /C 2 H 4 selectivity (1.849) were attained based on the activated GNU-2 ( GNU-2a ), exceeding a number of top C 2 H 6 -selective adsorbents. Grand canonical Monte Carlo (GCMC) simulations exhibit that the appropriate chemical environment of nonpolar cage in GNU-2a allows it to continuously maintain closer van der Waals contacts between C 2 H 6 molecule, saturated Zn cluster and nonpolar pore surface through multiple C H···O hydrogen interactions and C H···π hydrogen interactions. Moreover, dynamic breakthrough studies also show that GNU-2a displays the actual separation performances of C 2 H 6 .
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 31
·30938-30948
·
IF 2.8
Guo Shuangzhen,Dan Zhigang,Duan Ning,Chen Guanyi,Gao Wubin,Zhao Weijie
A novel magnetic silica gel adsorbent (Fe 3 O 4 -Si-COOH) was successfully prepared by introducing carboxyl group in situ to improve the performance for Pb(II), Zn(II), and Cd(II) adsorption. Infrared spectroscopy (IR), scanning electron microscope (SEM), transmission electron microscope (TEM), thermo-gravimetric analyzer (TGA), the Brunauer-Emmett-Teller (BET) surface area, X-ray diffraction (XRD), and vibrating sample magnetometer (VSM) characterizations suggested that Fe 3 O 4 -Si-COOH has been successfully prepared. The adsorption performance was evaluated by batch experiments with different initial concentrations, ionic strength, contact time, and pH. The adsorption kinetics data followed pseudo-second-order model and exhibited a three-stage intraparticle diffusion mode. Isothermal adsorption equilibrium data were best fitted by the Freundlich model and the adsorption capacity were 155, 110, and 93 mg/g (initial concentration 210 mg/L) for Pb(II), Zn(II), and Cd(II), respectively. The result of X-ray photoelectron spectroscopy (XPS) survey spectrum suggested that the main adsorption mechanism is that the H + of carboxyl groups exchanged with heavy metal ions in the adsorption processes. In addition, the adsorbed Fe 3 O 4 -Si-COOH could be regenerated and the adsorption capacity of reused Fe 3 O 4 -Si-COOH could maintain 80.3% after five cycles. Hence, the Fe 3 O 4 -Si-COOH could be a kind of potential material for removing Pb(II), Zn(II), and Cd(II) from wastewater.
Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jinxiang Yang,Zihao Wang,Wei Xiao,Yan Peng,Meishuang Qiu,Xiaorong Xiong,Yizhuo Lu,Tianyou Chen,Zushun Xu
Zn(II)-complex-based nanozymes have been extensively used for the cleavage of carboxylic esters and phosphate esters. Cooperativity between neighboring Zn(II) complexes is of paramount importance for the development of Zn(II)-complex-based nanozymes with excellent efficiency. Here, we have developed a controllable synthetic strategy for the construction of Zn(II)-complex-based nanozymes by using the nanoprecipitation technique, which could bring Zn(II) complexes in close proximity and regulate their microenvironments. Linear copolymers containing di(2-picolyl)amine moieties were used for the preparation of Zn(II)-complex-based nanozymes by the coordination between di(2-picolyl)amine and Zn(II) ion. These Zn(II)-complex-based nanozymes displayed excellent catalytic performance in the hydrolysis of carboxylic esters. Moreover, hydrophobic Fe 3 O 4 nanoparticles could be incorporated into Zn(II)-complex-based nanozymes via the one-step nanoprecipitation approach, enabling the recovery of nanozymes by using a permanent magnet. Such nanozymes effectively catalyzed the hydrolysis of methyl parathion , which is highly resistant to spontaneous hydrolysis and is extremely hazardous. These nanozymes may find application in the hydrolysis of hazardous carboxylic esters and phosphate esters.
研究领域:
生物化学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2017
·Vol. 90
·期 10
·1152-1156
·
IF 2.297
Li Yuanyuan,Su Yuqun,Xu Jing,Xu Zhen-liang,Xu Haitao
In this study, a new Zn coordination polymer (Zn-CP), hereafter, 1Zn, was successfully assembled in a solvothermal system, exhibiting one-dimensional extended chains. 1Zn morphologies were controlled by temperature and surfactants. In addition, the catalytic performance of 1Zn microsized CP was investigated. Knoevenagel condensation after 4 h afforded a conversion of 86%, and a conversion greater than 96% was obtained for 4-chlorobenzaldehyde and 4-bromobenzaldehyde because of their electron-withdrawing ligands. In addition, excellent selectivity was achieved for the degradation (64% conversion) of malachite green in aqueous solution. The microcrystal morphology affected the conversion, and a relative catalytic mechanism was proposed. The developed strategy of shape-controlled assembled CPs will certainly enhance new potential applications of micro-CPs.
研究领域:
材料科学
·
化学
·
催化
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）