CHEMICAL PAPERS
·
2020
·Vol. 74
·期 7
·2049-2057
·
IF 1.68
Ren Peng,Li Yang,Wang Zhifen,Geng Yanxia,Yu Tao,Hua Rong
Thorium is much more abundant than uranium in nature and has become one of the important potential energy sources in the future. It is because that a thorium-232( 232 Th) nucleus has the ability to produce a uranium-233( 233 U) nucleus by absorbing a neutron. The aim of this paper is to investigate the extraction and separation of thorium ions and uranyl ions from aqueous solution with N,N’ -dimethyl- N,N’ -dioctyl-4-oxaheptanediamide (DMDOHA) into ionic liquids of 1-methyl-3-butylimid-azolium bis(trifluoromethanesulfonyl)imide ([C 4 mim][NTf 2 ]). The results show that the extractant DMDOHA has a good affinity toward thorium ions than uranyl ions in the present system, the maximum value of separation factor SF Th(IV)/U(VI) is 21.9 at pH 2.24. The extraction process of thorium ions and uranyl ions was confirmed to proceed by cation-exchange extraction mechanism. The DMDOHA extractant formed a major 3:1 complex with thorium ion and a major 2:1 complex with uranyl ion based on the relationship between log[DMDOHA] with logD.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 6
·3180-3185
·
IF 11.301
Yuxiu Sun,Xuemeng Jia,Hongliang Huang,Xiangyu Guo,Zhihua Qiao,Chongli Zhong
The synergistic effect between multiple active sites is a powerful approach to wield control in catalysis. However, it remains a challenge to integrate various active species simultaneously into a porous material in an organized and cooperative manner. Herein, by virtue of the tunable secondary building units (SUBs) and pore structures of metal–organic frameworks (MOFs), we demonstrate a straightforward way to integrate multiple catalytic components into MOFs via mechanochemical synthesis, whereby the phase separation of various components can be avoided. The multi-functionality in the resulting MOFs came from doping the metal nodes with another metal species and encapsulating molecular catalysts in the cavities, as demonstrated by partially replacing the zinc ions with cobalt ions and enveloping ionic liquids (IL) in the ZIF-8 (Zn) framework to yield IL@ZIF-8(Zn/Co). It is shown that compared to the homometallic MOF, the bimetallic one together with the introduced ionic liquid brings about the opportunity to take advantage of the synergism. This is reflected in the superior performance of IL@ZIF-8(Zn/Co) with respect to the related individual components in the industrially relevant cycloaddition of epoxides and CO2. Given that the strategy presented is applicable to other MOF materials and molecular catalysts, our approach, therefore, opens a new avenue for the introduction of multi-functionality into MOFs for various potential applications.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Bio Materials
·
2020
·
IF 0
Mei Hong,Ziyue Miao,Xiaoling Xu,Qiang Zhang
Poly(ionic liquid)s (PILs) such as polymeric quaternary ammonium compounds (PQACs) are among the most widely used disinfectant agents due to their broad-spectrum antimicrobial activity. However, the high cytotoxicity and difficult reclamation of PQACs remain as challenges for practical water treatment. Herein, we present the synthesis of sugar-incorporated PQACs, which could efficiently decrease the cytotoxicity toward mammalian cells (mouse fibroblast cells, L929). On the basis of the mussel-inspired surface chemistry, the functional glycopolymers could then be immobilized onto the surface of magnetic iron oxide nanoparticles, which are successfully used for the trapping and killing of bacteria. The sugar-containing PILs have combined the lectin-recognition behavior of glycopolymers and the antibacterial activity of PQACs. Antibacterial experiments demonstrate the high-performance of cationic hybrid nanocomposites in killing pathogenic Escherichia coli (E. coli), up to 100% sterilization efficiency. The nanocomposites could be facilely recovered under external magnetic field, and a high sterilization efficiency of 94% could be retained during a five-circulation use. Such hybrid nanocomposites are highly efficient, expediently recyclable, and low-cytotoxicity disinfectant agents and may have potential application for water disinfection treatment.
✓ 已验证
产品关联
DOI
PubMed
IONICS
·
2020
·Vol. 26
·期 10
·4803-4812
·
IF 2.394
Sha Yifan,Dong Tao,Zhao Qiu,Zheng Hongshuai,Wen Xinge,Chen Shimou,Zhang Suojiang
An ether-functionalized polymeric ionic liquid poly(methyl methacrylate-1-vinyl-3-methoxyl-ethyl-imidazolium bis(trifluoromethanesulfonyl)imide) P(MMA-co-VIm(1O2)) (TFSI) polymeric ionic liquid (PIL) was successfully synthesized, characterized, and used as polymer matrix. The performances of solid polymer electrolytes membrane were measured through blending with poly(vinylidene fluoride-cohexafluoropropylene) (PVDF-HFP) and 1-propyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide ([Pyr 13 ][TFSI]). The ionic conductivity of polymer electrolytes was optimized up to 5.10 × 10 −4 S cm −1 at 25 °C, and a wide electrochemical window of 5.23 V vs Li/Li + could be obtained. Moreover, the polymer electrolytes showed excellent cycle performance for Li/LiFePO 4 cell at both 25 °C and 60 °C, demonstrating the capability of being a promising candidate for the application of solid-state lithium-ion batteries.
Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Han Sun,Shuang Wang,Yinghe Cui,Zhipeng Yong,Dan Liang,Xiaodong Wang,Xiaorui Wang,Chenglong Li,Feng Pan,Zhe Wang
Branched polymers have unique three-dimensional dendritic structures, so they have received a lot of attention in the application of high temperature proton exchange membranes . In this work, we synthesize BOPBI-X (X = 3%, 6%, 9%) membranes with different branched ratios based on the synthesis of OPBI, due to the introduction of a rigid triazine structure with a larger free volume, the membranes could absorb more phosphoric acid (PA) while maintaining sufficient mechanical strength . Among them, the BOPBI-6% membrane obtains splendid comprehensive performance, when the PA doping level (ADL) is 9.55, it achieves a proton conductivity of 99.2 mS cm −1 at 180 °C, which is 1.8 times higher than OPBI (54.8 mS cm −1 ), and it performs well in long-term oxidation stability test after 144 h, it still has a mass retention rate of 90%. For the sake of further boost the performance of the membrane, cross-linkable polymeric ionic liquid (PIL) is introduced to the system. Among them, BOPBI-PIL-30% membrane has sufficient mechanical properties (5.50 ± 0.8 MPa), and the proton conductivity (146.9 mS cm −1 ) at 180 °C is also excellent, so BOPBI-PIL-30% membrane is expected to be a promising candidate as HT-PEMs.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 20
·6800
·
IF 4.927
Moju Li,Xusheng Dai,Aifeng Li,Qi Qi,Wenhui Wang,Jia Cao,Zhenting Jiang,Renmin Liu,Hongbo Suo,Lili Xu
Enzymes are difficult to recycle, which limits their large-scale industrial applications. In this work, an ionic liquid-modified magnetic metal–organic framework composite, IL-Fe3O4@UiO-66-NH2, was prepared and used as a support for enzyme immobilization. The properties of the support were characterized with X-ray powder diffraction (XRD), Fourier-transform infrared (FTIR) spectra, transmission electron microscopy (TEM), scanning electronic microscopy (SEM), and so on. The catalytic performance of the immobilized enzyme was also investigated in the hydrolysis reaction of glyceryl triacetate. Compared with soluble porcine pancreatic lipase (PPL), immobilized lipase (PPL-IL-Fe3O4@UiO-66-NH2) had greater catalytic activity under reaction conditions. It also showed better thermal stability and anti-denaturant properties. The specific activity of PPL-IL-Fe3O4@UiO-66-NH2was 2.3 times higher than that of soluble PPL. After 10 repeated catalytic cycles, the residual activity of PPL-IL-Fe3O4@UiO-66-NH2reached 74.4%, which was higher than that of PPL-Fe3O4@UiO-66-NH2(62.3%). In addition, kinetic parameter tests revealed that PPL-IL-Fe3O4@UiO-66-NH2had a stronger affinity to the substrate and, thus, exhibited higher catalytic efficiency. The results demonstrated that Fe3O4@UiO-66-NH2modified by ionic liquids has great potential for immobilized enzymes.Keywords:metal–organic framework;magnetic nanoparticles;lipase;ionic liquids;immobilization
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2020
·
IF 3.871
Shuo Li,Han Jiang,Jun Zhang,Ao-Shuai Zhang,Yong-dong Zhao,Xin Zhao,Zhi-Ping Zhao
Polysulfone (PSF) material loaded with ionic liquids (ILs), PSF-ILs, was prepared by grafting imidazolyl acid ILs onto PSF by chemical bonding. A porous PSF-ILs microsphere catalyst was prepared via non-solvent induced phase separation (NIPS) method in order to catalyze the biomass inulin hydrolysis. The influences of degree of chloromethylation of PSF, hydrolysis temperature, catalyst dosage, PSF-ILs microsphere morphology, coagulation bath of NIPS and inulin concentration on hydrolysis performance were studied respectively. Under this optimal reaction conditions, 95.65% conversion of inulin into reducing sugar was achieved. The results suggested that the catalytic inulin hydrolysis performance of PSF-ILs microsphere was attractive due to high-density spatial distribution of the active sites on the surface and inner pore wall of microsphere after ILs immobilized. The hydrolysis kinetics was also investigated. The kinetic models of inulin hydrolysis catalyzed by PSF-ILs microsphere were employed to predict the hydrolysis in a wider range of experimental conditions. Furthermore, the stability tests showed that PSF-ILs microsphere catalyst could be effectively separated and recovered from hydrolysates, and has good regeneration ability. The morphology of PSF-ILs microspheres remained intact after eight trials of catalytic hydrolysis, avoiding the crushing phenomenon like a powder polymer material. More importantly, the PSF-ILs microsphere can effectively avoid the potential harm of ILs to the ecological environment, and is a potential green catalyst.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2026
·
IF 6
Xin Wang,Cheng Tang,Jinbi Che,Chengzhang Deng,Yingying Chang,Sijie Liu,Shuangfeng Yin,Rong Tan
Atomic-thick 2D Janus catalyst with an interfacial ionic liquid bridge were developed. • The catalyst positions catalytic site at oil–water interface by the formation of stable emulsion. • IL acts as a compatible bridge, creating quasi-homogeneous interfacial microenvironments. • Unprecedented activity was obtained as a result of “quasi-homogeneous interfacial catalysis”. • The catalyst could be easy recovered for efficient reuse via simple centrifugation. Pickering emulsions are of considerable interest in the chemical industry because they provide large oil–water interfacial areas for interfacial catalysis. However, solid emulsifiers located at oil–water interface often impede the mass transfer across the interface, thereby limiting the reactivity of biphasic reactions. Here we report a quasi-homogeneous Pickering interfacial catalysis strategy to overcome this diffusion barrier by employing an ultrathin amphiphilic Janus film as the solid emulsifier and introducing a compatible ionic liquid (IL) as a multifunctional interfacial bridge. Hydrophobic chiral neat Ti IV salen complexes (Ti(salen)) were thus selectively grafted onto one side of single-layer porous graphene oxide (PGO) through an imidazolium-based IL linker, enabling asymmetric oxidation of sulfides with H 2 O 2 in water. The atomic-thick GO film precisely positions Ti(salen) catalytic sites at oil–water interface, while the hydrophilic IL moieties located on the hydrophobic catalytic side act as molecular bridge between the oil and aqueous phases owing to their unique compatibility. This engineered interfacial microenvironment allows the water-soluble oxidant to directly access the hydrophobic substrate at the catalytic interface without a significant diffusion barrier. As a consequence, asymmetric sulfoxidation in water proceeds in a quasi-homogeneous manner, affording a broad range of chiral sulfoxides in excellent yields (93–98%) and enantioselectivities (92–99% ee), surpassing the performance of most reported Pickering interfacial catalysts. Moreover, the quasi-homogeneous Pickering interfacial catalysis strategy also delivers efficient asymmetric sulfa-Michael addition in water when chiral Fe Ⅲ –salen complexes are used as catalytic sites. Download: Download high-res image (179KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2023
·Vol. 11
·期 47
·11251-11264
·
IF 7
Xiao Wen,Zhipeng Deng,Hui Wang,Jianyang Shi,Shuang Wang,Haibo Wang,Yueming Song,Zongliang Du,Jinghong Qiu,Xu Cheng
Ionogels with both high strength and high conductivity for wearable strain and pressure dual-mode sensors are needed for human motion and health monitoring. Here, multiple hydrogen bonds are introduced through imidazolidinyl urea (IU) as a chain extender to provide high mechanical and self-healing properties for the water–borne polyurethane (WPU). The MXene/ionic liquids synergistic conductive network provides excellent conductivity and also reduces the relative content of ionic liquids to maintain the mechanical properties of the ionogels. The mechanical strength of this ionogel reached 1.81–2.24 MPa and elongation at break reached 570–624%. It also has excellent conductivity (22.7–37.5 mS m−1), gauge factor (GF) (as a strain sensor, GF = 1.8), sensitivity (S) (as a press sensor, S1 = 29.8 kPa−1, S2 = 1.3 kPa−1), and fast response time (as a strain sensor = 185 ms; as a press sensor = 204 ms). The ionogel also exhibits rapid photothermal self-healing capabilities due to the inherent photothermal behavior of MXene. It can maintain good elasticity and conductivity at low temperatures. In addition, this ionogel is able to stretch for 1200 cycles without significant change in the relative change of resistance. The ionogel can be assembled as a strain sensor for monitoring human motion and as a pressure sensor array for obtaining pressure magnitude and position information.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Research
·
2023
·
IF 9.9
Liu Guangyong,Lu Yumiao,Lu JunFeng,Wang Yanlei,Liang Shijing,He Hongyan,Jiang Lilong
Electrocatalytic depolymerization of lignin into value-added chemicals offers a promising technique to make biorefining sustainable. Herein, we report a robust trimetallic PdNiBi electrocatalyst for reductive C-O bond cleavage of different lignin model dimers and oxidized lignin under mild conditions. The reduction reaction proceeds with complete substrate conversion and excellent yields toward monomers of phenols (80%–99%) and acetophenones (75%–96%) in the presence of an ionic liquid electrolyte with operational stability. Systematic experimental investigations together with density functional theory (DFT) calculations reveal that the outstanding performance of the catalyst results from the synergistic effect of the metal elements, which facilitates the easier formation of a key C α radical intermediate and the facile desorption of the as-formed products at the electrode. The results open up new opportunities for lignin valorization through the green electrocatalytic approach.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Qian Wang,Limei Sheng,Xuan Guo,Rong Chen,Chengjie Zhou,Fu Yang
Dynamic kinetic resolution (DKR) of chiral amines with enzyme and noble metal has been widely concerned in chemistry, biology and pharmacy fields. While the synergistic effect and long-term stability of enzyme-noble metal in catalysts remain challenging. In this paper, several functional polymers were designed and employed as the carrier of lipase and palladium (Pd) for one-pot DKR of α-phenethylamine. By modulating the multisite weak force (MSWF) of the polymers on the active centers, the optically pure product with high conversion (>99%) and ee (>99%) were obtained and the designed catalyst Pd@PE-2OH_CalB showed superior stability to other commercial catalysts, such as Pd/C and Novozym 435. Additionally, the heterogeneous chemoenzymatic catalysts could be easily recovered and recycled up to seven times without sacrificing efficiency. Further investigation revealed that the enhanced catalytic performance depended on MSWF formed by the abundant ionic sites, functional groups, and lots of hydrogen bonds of poly(ionic liquid)s.
✓ 已验证
产品关联
DOI
高影响因子
Separations
·
2021
·Vol. 8
·期 2
·22
·
IF 2.777
Pei Chen,Xiaoman Li,Xuemin Yan,Minglei Tian
(1) Background: ZIF-67 is one of the most intriguing metal–organic frameworks already applied in liquid adsorption. To increase its adsorption performance, dual ionic liquids were immobilized on ZIF-67 in this research; (2) Methods: The obtained sorbent was used to adsorb aristolochic acid I (AAI) in standard solutions. Then, the sorbent was applied in solid-phase extraction to remove AAI fromFibraurea Recisa Pierreextracted solution. (3) Results: By analyzing the adsorption models, the highest adsorption capacity of immobilized sorbent (50.9 mg/g) was obtained at 25 °C within 120 min. In the SPE process, 0.02 mg of AAI was removed per gram of herbal plant, the adequate recoveries were in the range of 96.2–100.0%, and RSDs were 3.5–4.0%; (4) Conclusions: The provided experimental data revealed that ZIF-67@EIM-MIM was an excellent potential sorbent to adsorb and remove AAI from herbal plant extract, and the successful separation indicated that this sorbent could be an ideal material for the pretreatment of herbal plants containing AAI.Keywords:dual ionic liquids;metal–organic framework;aristolochic acid I;Fibraurea Recisa Pierre
✓ 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）