APPLIED CLAY SCIENCE
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2021
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IF 5.467
Jiangtao Peng,Haowei Sun,Jian Wang,Peiping Zhang,Weikun Ning,Yan Wang,Wei Zhang,Wenqing Li,Cundi Wei,Shiding Miao
A type of clay-supported catalysts were developed for conversion of CO 2 by encapsulating ZnBr 2 -based Lewis acidic ionic liquids (ZnBr 2 /IL) in halloysite (Hal) via a one-step strategy. The Lewis acidic ionic liquid was loaded within enlarged lumens of Hal via acid treatment, and the mesoporous structure was found to benefit for CO 2 storage/conversion. The composite ZnBr 2 /IL@P-Hal was found to have an adsorption capacity (6.43 cm 3 /g) of CO 2 via adsorption/desorption isotherm measurements. The composite ZnBr 2 /IL@P-Hal showed excellent catalytic performance (TOF value was 1747.7 h −1 ) for coupling of CO 2 with epoxides to produce propylene carbonate under the lack of any cocatalyst . Kinetic investigations indicated the reaction followed an order of one, with respect to catalyst ZnBr 2 /IL@P-Hal. The overall pathway of CO 2 cycloaddition was theoretically validated via DFT calculations. These experimental and computational efforts deepen comprehension of the rational design of clay-based catalysts for CO 2 cycloaddition, further elucidated halloysite was a promising support.
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Journal of Materials Chemistry A
·
2021
·Vol. 10
·期 2
·762-771
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IF 12.732
Ziming Zhao,Qing Dai,Xiaofeng Li,Suobo Zhang,Shenghai Li,Xianfeng Li
Vanadium flow batteries (VFBs) are attracting increasing attention due to their promising prospect for large-scale energy storage. However, the high cost and low selectivity of current membranes limit their further application. In this work, a highly conductive (1122 mS cm−1) and stable microporous membrane was obtained via oxidizing a dense anion exchange membrane by an in situ or off situ process. Poly[(fluorene alkylene)-co-(biphenyl alkylene)] (PFBA-QA) with pendant quaternary ammonium alkyl groups was designed and prepared. The difference in stability between the main and side chains of the ether-free polymer allows the transformation of ion channels from aggregated ion clusters in the dense membrane to micropores by sacrificing the side chain in a strong oxidative environment. As a result, a VFB assembled with the resulting membrane demonstrates a CE of 97% and an EE of 88% at a current density of 80 mA cm−2, which can stably run for more than 290 cycles. This paper provides a new option for the membrane design in VFBs.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2023
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IF 5.8
Chuanhui Teng,Wei Lv,Yuqin Chen,Linfeng Liu,Jiaqing Yin,Shengnan Li,Zhiyi Min,Qi Zhang,Weichong He,Kunfang Ma,Xinrui Li,Xiang Cao,Hongliang Xin
Since ischemic stroke occurs by a combination of multiple mechanisms, therapies that modulate multiple mechanisms are required for its treatment. The combination of edaravone (EDA) and borneol can significantly ameliorate the symptoms of neurological deficits in cerebral ischemia–reperfusion model in rats. In this study, the solubility of borneol and edaravone was improved by hydroxypropyl-β-cyclodextrin and PEG 400 . Furthermore, a nasal temperature-sensitive hydrogel containing both edaravone and borneol inclusion complex (EDA-BP TSG S ) was developed to overcome the obstacles of ischemic stroke treatment including the obstruction of the blood–brain barrier (BBB) and the unavailability and untimely of intravenous injection. The effectiveness of the thermosensitive hydrogel was investigated in transient middle cerebral artery occlusion/reperfusion model rats (MCAO/R). The results showed that EDA-BP TSG S could significantly alleviate the symptoms of neurological deficits and decrease the cerebral infarct area and the degree of brain damage. In summary, nasal EDA-BP TSG S is a secure and effective brain-targeting formulation that may provide a viable option for the clinical prophylaxis and treatment of ischemic stroke.
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APPLIED CLAY SCIENCE
·
2022
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IF 5.907
Jinsheng Yu,Peiping Zhang,Yan Zhang,Kexin Sun,Xuefa Shi,Lina Li
Photocatalytic technology is considered to be one of the most promising technologies for the removal of organic contaminants . Conjugated Microporous Polymers and their composites are considered to be an effective material for degrading antibiotic contamination, due to their high specific surface area, excellent chemical stability and certain photocatalytic activity . Herein, we synthesized a new type of CMP composite material (PAF-Mt) with montmorillonite template to improve the photocatalytic properties. The results showed that the incorporation of montmorillonite template adjusted electronic band structures of final material, significantly enhanced its photocatalytic activity, and showed excellent photocatalytic efficiency for ofloxacin, tetracycline , ciprofloxacin and chloramphenicol. The efficiencies got increased markedly (325% to 766%) compared to the PAFs without template addition.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Zhipeng Xie,Wenbin Wang,Xiating Ke,Xu Cai,Xiong Chen,Sibo Wang,Wei Lin,Xinchen Wang
Polymeric carbon nitride (PCN) is an emerging class of polymer semiconductor photocatalysts, but bulk PCN typically suffers from low visible-light-harvesting ability, high activation energy, and rapid charge recombination. In this context, using the same core building block, a donor-acceptor (D-A) type heptazine-based polymer, namely BPCN, was proposed via Friedel-Crafts arylation reaction to tackle these issues. Comparatively, the affording BPCN features extended light absorption, reduced activation energy, and suppressed charge recombination, triggered by the electron push-pull interactions as a consequence of the D-A configuration. BPCN is elucidated to be an effective heterogeneous photocatalyst for aerobic organic transformations and a wide range of substrate scopes and reactions were realized. Besides, BPCN also showed an advantage in mediating the photocatalytic water oxidation reaction, achieving a nearly 10-fold oxygen evolution reaction (OER) rate over PCN. These findings demonstrate the great potential of the rational design of heptazine-based polymers with D-A configurations for artificial photosynthesis.
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SOLID STATE IONICS
·
2023
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IF 3.2
Peipei Lai,Chunzheng Liu,Zhuo Sun,Zhejuan Zhang
Chemical prelithiation has become an increasingly popular method for compensating the initial irreversible capacity loss of lithium ion batteries and improving their initial Coulombic efficiency (ICE). For composite anode materials composed of silicon , amorphous carbon and graphite (SCG), pre-embedding Li + into all three components simultaneously by chemical prelithiation is challenging because of different activation potential. In this study a chemical prelithiation method using lithium-biphenyl (Li-Bp) as the lithiation reagent and a 2-methyl tetrahydrofuran (2-meTHF) solution as the reducing solvent is designed to enhance the ICE for SCG anodes. The prelithiation reagent by mixed with Li-Bp combined 2-meTHF facilitates the formation of a stable solid electrolyte interface (SEI) film composed of Li 2 O/Li 2 CO 3 and forms Li x Si y alloy. The ICE of prelithiated SCG in half-cell format can be increased from 76.8% to 93.98% when prelithiated twenty minutes (SCG-20). When matched with a LiFePO 4 cathode, the coin full cell with prelithiated SCG exhibits an improved ICE from 38.92% to 56.88% and cycling performance than the pristine cells. This work highlights the promise of adopting chemical prelithiation for composite anodes to achieve practical high-energy batteries .
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Yuyue Peng,Jinsheng Yu,Xianhao Liu,Timur Meng,Xiaohui Zhao,Lina Li
The specific regulation of pore structure in porous aromatic framework (PAF) materials is of paramount importance for achieving exceptional performance. In this study, we propose a novel approach by utilizing the two-dimensional layered mineral, montmorillonite , as a template for the synthesis of PAF-Mt. Through a meticulously designed hydrothermal method , the residual template is completely eliminated, resulting in the creation of a new porous aromatic framework material, termed PAF-Mt-Free. Our research findings demonstrate remarkable improvements in the morphology, surface area, and pore size of PAF-Mt-Free compared to classical PAFs. Specifically, the morphology of PAF-Mt-Free undergoes a transformation from spherical to smaller fragmented particles. The specific surface area （968.163 m 2 /g） is enhanced by 47.9% compared to PAF-Mt（654.784 m 2 /g） and by 68.3% compared to PAF-45（575.390 m 2 /g）. Moreover, the main pore size of PAF-Mt-Free increases from approximately 0.5 nm to 0.9 nm. Importantly, PAF-Mt-Free not only maintains the excellent photocatalytic performance of PAF-Mt but also exhibits significantly enhanced adsorption capacity, particularly for organic molecules with a size smaller than 1 nm. Notably, the adsorption efficiency for benzene, toluene, chlorobenzene , and bromobenzene increases by 10%, 18.4%, 11%, and 13.2%, respectively. These findings highlight the promising potential of utilizing montmorillonite templating for the precise control of pore structure in PAF materials, leading to enhanced adsorption performance. Our study contributes to the advancement of porous aromatic framework materials and their applications in various fields.
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JOURNAL OF HAZARDOUS MATERIALS
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2023
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IF 13.6
Yaming Sun,Wenjie Sun,Junnan Li,Tao Zhang,Wenjie Zhao,Guoqiang Xiang,Tiantian Yang,Lijun He
There is an urgent need to develop efficient and reliable coating materials for solid phase microextraction (SPME), in order to quantify and monitor pollutants in environmental waters. Herein, a highly graphitized porous carbon/reduced graphene oxide (PC/rGO) was successfully synthesized by pyrolysis of metal organic framework / graphene oxide precursors, and used as a SPME coating for ultrahigh enrichment of polycyclic aromatic hydrocarbons (PAHs) from water. The as-prepared PC/rGO exhibited high degree of graphitization , abundant number of micro/mesopores along with exceptional thermal stability, making it an ideal SPME coating material. The PC/rGO fiber offered an ultrahigh enrichment factor for PAHs (up to 126057), which could be attributed to the multiple interactions between the PC/rGO and PAHs, including hydrophobic and π - π interactions, partitioning, and mesopore filling effect. In the analysis of PAHs, the PC/rGO fiber showed a wide linearity (0.007–100 ng mL −1 ), low limits of detection (0.0005–0.005 ng mL −1 ), and good repeatability (RSDs <10.1%, n = 5) under optimized conditions. The established method was applicable for ultrasensitive determination of PAHs in different environmental waters and showed satisfactory recoveries. This study provides a novel way for constructing thermally stable SPME coating having efficient extraction performance.
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高影响因子
Chemical Science
·
2023
·Vol. 14
·期 44
·12570-12581
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IF 8.4
Mingli Xu,Fengxue Zhang,Yanhui Zhang,Chen Wu,Xue Zhou,Xinping Ai,Jiangfeng Qian
Exploring a sodium-enriched cathode (i.e. Na4V2(PO4)3, which differs from its traditional stoichiometric counterpart Na3V2(PO4)3 that can provide extra endogenous sodium reserves to mitigate the irreversible capacity loss of the anode material (i.e. hard carbon), is an intriguing presodiation method for the development of high energy sodium-ion batteries. To meet this challenge, herein, we first propose a redox-potential-matched chemical sodiation approach, utilizing phenazine-sodium (PNZ-Na) as the optimal reagent to sodiate the Na3V2(PO4)3 precursor into Na-enriched Na4V2(PO4)3. The spontaneous sodiation reaction enables a fast reduction of one-half V ions from V3+ to V2+, followed by the insertion of one Na+ ion into the NASICON framework, which only takes 90 s to obtain the phase-pure Na4V2(PO4)3 product. When paired with a hard carbon anode, the resulting Na4VP‖HC full cell exhibits a high energy density of 251 W h kg−1, which is 58% higher than that of 159 W h kg−1 for the Na3VP‖HC control cell. Our chemical sodiation methodology provides an innovative approach for designing sodium-rich cathode materials and could serve as an impetus to the development of advanced sodium-ion batteries.
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Microorganisms
·
2023
·Vol. 11
·期 10
·2383
·
IF 4.5
Rui Chen,Zhenhua Zhao,Tao Xu,Xiaoqiang Jia
Phenanthrene (PHE) is one of the model compounds of polycyclic aromatic hydrocarbons (PAHs). In this study, a natural PHE-degrading microbial consortium, named HJ-SH, with very high degradation efficiency was isolated from soil exposed to long-term PHE contamination. The results of GC analysis showed that the consortium HJ-SH degraded 98% of 100 mg/L PHE in 3 days and 93% of 1000 mg/L PHE in 5 days, an efficiency higher than that of any other natural consortia, and even most of the engineered strains and consortia reported so far. Seven dominating strains were isolated from the microbial consortium HJ-SH, named SH-1 to SH-7, which were identified according to morphological observation and 16S rDNA sequencing asPseudomonassp.,Stenotrophomonassp.,Delftiasp.,Pseudomonassp.,Brevundimonassp.,Curtobacteriumsp., andMicrobacteriumsp., respectively. Among all the seven single strains, SH-4 showed the strongest PHE degradation ability, and had the biggest degradation contribution. However, it is very interesting that the microbial consortium can hold its high degradation ability only with the co-existence of all these seven single strains. Moreover, HJ-SH exhibited a very high tolerance for PHE, up to 4.5 g/L, and it can degrade some other typical organic pollutants such as biphenyl, anthracene, and n-hexadecane with the degradation ratios of 93%, 92% and 70%, respectively, under 100 mg/L initial concentration in 5 days. Then, we constructed an artificial consortium HJ-7 consisting of the seven single strains, SH-1 to SH-7. After comparing the degradation ratios, cell growth, and relative degradation rates, it was concluded that the artificial consortium HJ-7 with easier reproducibility, better application stability, and larger room for modification can largely replace the natural consortium HJ-SH. In conclusion, this research provided novel tools and new insights for the bioremediation of PHE and other typical organic pollutants using microbial consortia.Keywords:microbial consortium;PAHs;biodegradation;phenanthrene;tolerance;bioremediation
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Materials Today Chemistry
·
2023
·
IF 7.3
Yanchao Zhang,Yiman Gu,Song Wang,Di Liu,Yongjiang Yuan,Yan Wang,Xiaoyu Chi,Tianming Dong,Zhanyu Li,Jingyi Wu,Yijia Lei,Zhe Wang
In order to prepare anion exchange membranes with good performance, and we prepared ether-free bonded poly(biphenyl-piperidine) anion exchange membranes (CQPBP-M-x, x is degree of crosslinking) by introducing cross-linked imidazolium ionic liquids . The introduction of cross-linked imidazolium ionic liquids increases multiple OH − transport sites and establishes a more pronounced microphase-separated structure with the backbone, while acting synergistically with piperidinium cations, resulting in improved membrane conductivity. Meanwhile, the introduction of an ether-free backbone and the construction of a cross-linked structure could promote the chemical stability of the membrane and effectively inhibit membrane swelling. The prepared cross-linked imidazole ionic liquid poly(biphenyl-piperidine) (CQPBP-M-30 %) membrane exhibited relatively good ionic conductivity (88.03 mS/cm), and low swelling (11.75 %) at 80 °C. The H 2 –O 2 fuel cell performance test conducted at 80 °C without back pressure showed a peak power density of 125.7 mW/cm 2 . Therefore, it is a worthwhile direction to explore to improve the performance of anion exchange membranes by adopting an ether-free backbone and constructing a cross-linked structure contain multiple cationic groups.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Chuan Long,Zhihua Wang,Hong Zhu
In recent years, ether-free polyaryl polymers prepared by superacid-catalyzed Friedel-Crafts polymerization have attracted great research interest in the development of anion exchange membranes(AEMs) due to their high alkali resistance and simple synthesis methods . However, the selection of monomers for high-performance polymer backbone and the relationship between polymer structure construction and properties need further investigated. Herein, a series of free-ether poly(aryl piperidinium) (PAP) with different polymer backbone steric construction were synthesized as stable anion exchange membranes . Meta-terphenyl, p-terphenyl and diphenyl-terphenyl copolymer were chosen as monomers to regulate the spatial arrangement of the polymer backbone, which tethered with stable piperidinium cation to improve the chemical stability. In addition, a multi-cation crosslinking strategy has been applied to improve ion conductivity and mechanical stability of AEMs, and further compared with the performance of uncrosslinked AEMs. The properties of the resulting AEMs were investigated and correlated with their polymer structure. In particular, m-terphenyl based AEMs exhibited better dimensional stability and the highest hydroxide conductivity of 144.2 mS/cm at 80 °C than other membranes, which can be attributed to their advantages of polymer backbone arrangement. Furthermore, the hydroxide conductivity of the prepared AEMs remains 80%–90% after treated by 2 M NaOH for 1600 h, exhibiting excellent alkaline stability. The single cell test of m-PTP-20Q4 exhibits a maximum power density of 239 mW/cm 2 at 80 °C. Hence, the results may guide the selection of polymer monomers to improve performance and alkaline durability for anion exchange membranes.
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