ADVANCED FUNCTIONAL MATERIALS
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2021
·Vol. 32
·期 2
·2108296
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IF 18.808
Yangyang Ju,Xian-gang Wu,Sheng Huang,Guang Dai,Tinglu Song,Haizheng Zhong
The time evolution of the photoluminescence properties in phenylethylammonium tin halide perovskite (PEA 2 SnI 4 ) film as a function of oxygen concentration is reported. Photo-brightening and reversible photoluminescence quenching are observed in PEA 2 SnI 4 film at ultralow oxygen concentration (< 1.5 vol%). In the case of 1.5 vol% < [O 2 ] < 21 vol%, the photoluminescence emission of PEA 2 SnI 4 film can be partially recovered after resetting the samples to nitrogen box. As the oxygen concentration further increases with the range of 21 to 95 vol%, the photoluminescence emission of PEA 2 SnI 4 film is significantly quenched and can only be slightly recovered after removing it to the nitrogen box. By correlating the material characterizations and theoretical analysis, the interactions between PEA 2 SnI 4 and oxygen contain physisorption and chemical reactions are illustrated. Depending on the oxygen concentration, the chemical reactions between PEA 2 SnI 4 and oxygen can be reversible and/or irreversible. The insights into oxygen concentration effects provide a guideline to optimize the stability of PEA 2 SnI 4 for achieving high-performance optoelectronic devices.
研究领域:
材料科学
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光电学
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化学
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物理学
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DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2025
·Vol. 122
·期 3
·e2416817122
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IF 9.1
Zhengqiang Hu,Fengling Zhang,Feng Wu,Li Li,Renjie Chen
Lithium-ion batteries (LIBs) have become advanced energy storage technologies; however, specific capacity remains limited by the active materials in cathodes. Here, we report Li–LiNO3 batteries (LNBs) where LiNO3 in electrolyte serves as both active materials and ion conductor at room temperature. LNBs operate on a highly reversible redox between NO3− and NO2−, which results in an impressive areal capacity of 19 mAh cm−2 at a plateau voltage of 1.75 V. Furthermore, the pouch cell exhibits stable cycling at a capacity of 100 mAh. This research underscores the potential of LNBs for high-capacity energy storage.
研究领域:
材料科学
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电化学
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2024
·
IF 2.8
Lixiang Wang,Jingwen Li,Mingqiang Li,Xinping Duan,Haochen Weng,Shuailiang Xu
In this study, we introduce a novel “water-in-salt” electrolyte for Bromine-ion batteries (BIBs) for the first time: 3M AlCl 3 + 1M NH 4 Br. The 3M AlCl 3 establishes the “water-in-salt” system, while 1M NH 4 Br supplies Br- ions. Employing flexible graphite paper as the cathode, during charging, Br- cooperates with AlCl 3 , forming AlCl 3 Br - ions that embed into the graphite paper, resulting in reversible reactions during discharge. The anode utilizes various metals such as Zn, Cu, Pb, In 2 O 3 , undergoing reversible redox reactions in the charge–discharge process. The designed electrolyte effectively prevents elemental bromine generation, presenting a safe, green, and environmentally friendly aqueous electrolyte suitable for BIBs.
研究领域:
能源存储
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材料科学
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环境科学
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DOI
高影响因子
POLYMER JOURNAL
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2017
·Vol. 49
·期 11
·775-781
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IF 2.145
Cao Shan,Li Shouhai,Li Mei,Xu Lina,Ding Haiyang,Xia Jianling,Zhang Meng,Huang Kun
Thermosetting polyurethanes have excellent elastic properties and solvent resistance, but they cannot be reshaped like thermoplastic polymers after molding. In this study, we designed a thermosetting polyurethane based on a reversible reaction between isocyanates and phenolic hydroxyls instead of alcoholic hydroxyls. The phenolic urethane partially decomposed above 120 °C, but the phenolic hydroxyl and isocyanate groups reconnected upon cooling. These reversible urethane bonds contributed to the thermal self-repair of the thermosetting polyurethane network. This thermosetting elastomer was organic-insoluble below 120 °C. Compared to the original material, the healed thermoset preserved approximately 70% of its tensile strength and exhibited 86% elongation at break. This thermosetting polyurethane can be applied in self-healing coatings or adhesives.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
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IF 3.141
Xingang Li,Rui Wang,Jian Na,Hong Li,Xin Gao
The feasibility of employing reversible reactions to convert the separation of ethanediol (EG) and 1,2-butanediol (1,2-BDO) azeotropic system was analyzed in our previous work. This article aims at systematically screening the feasible reactants for the reaction-assisted separation process. A screening principle was brought up and applied. Through preliminary screening, acetic acid, acrylic acid, acetaldehyde, propionaldehyde, propanol, and butanone were obtained as potential reactants. Propionaldehyde was chosen as the proper one after fully comparing the reaction selectivity difference and conversion of EG and 1,2-BDO in the reaction process, the separation efficiency in the purification process, and final EG yield. The separation efficiency was predicted based on the relative volatility of EG, 1,2-BDO, and their corresponding products and was verified by distillation experiments. The stratification appeared in the reaction was found beneficial to the coupling of reaction and separation.
研究领域:
化学工程
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分离技术
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Yan Wang,Wanxiang Zhang,Shuhang Ren,Yucui Hou,Weize Wu
Due to low cost and high efficiency, amino-based functionalized deep eutectic solvents (DESs) have been widely investigated in CO2 capture. The amino group reacted with CO2 in a quantized ratio of 2:1 to form a carbamate and quaternary ammonium cation, which not only limited the absorption capacity of the amino group but also led to a dramatic increase in viscosity. In this work, we proposed a new strategy to improve the absorption capacity of amino-based functionalized DESs and inhibit viscosity increase by changing the proton transfer site from –NH2 to –N═ to prevent the formation of –NH–COO– and –NH3+ using aromatic amines and ethylene glycol (EG). EG exhibited significant activation effect on 4-aminopyridine (AP). The absorption capacity of AP was enhanced from 0.10 mol of CO2/mol of DES to 0.60 mol of CO2/mol of DES at 303.15 K and 101.3 kPa after forming DES with EG. In addition, the saturated DES could be rapidly regenerated within 20 min at 353.15 K, and the absorption performance was maintained after six cycles. Results of proton nuclear magnetic resonance and carbon nuclear magnetic resonance spectra revealed the formation of carbamate and the protonation of pyridine nitrogen. The new reaction path effectively reduced the increase in viscosity. The viscosity of AP/EG (1:3) DES increased slightly from 29.17 to 68.40 mPa·s after absorption.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2016
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IF 4.055
Yahui Zhang,Lingwei Kong,Xiaoling Pan,Huiling Mao,Xiangkai Zeng,Jianbing Shi,Bin Tong,Yuping Dong
A multicolor switching was achieved via simple reversible coordinationand acetalation reaction between aldehydes, tri(pentafluorophenyl)borane (BCF) and methanol. The coordination [HPB → BCF] of 4,4′-[(1E,3E)-1,2,3,4-tetraphenylbuta-1,3-diene-1,4-diyl]- dibenzaldehyde ( E,E- HPB) to tri(pentafluorophenyl)borane can change the emissive wavelength from 550 to 630 nm, while transformation of the aldehyde into acetal can change the emissive wavelength from 550 to 530 nm in the presence of methanol. More important, these reactions can access reversibility easily and tune the emission color repeatedly between cyan, yellow and red. All of these dyes show typical aggregation-induced emission (AIE) or aggregation-enhanced emission (AEE) characteristics. In addition, a tunable photoluminescence mechanism is proposed based on the characterization data including NMR , XRD , MS and IR. The result may provide a new design strategy for the multicolor switches and their related applications.
研究领域:
化学
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材料科学
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2012
·Vol. 95
·期 7
·2322-2329
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IF 2.272
Wei Chen,Dandan Yu,Hong Ruan,Danzhen Li,Yin Hu,Yibin Chen,Yunhui He,Xianzhi Fu,Yu Shao
To controllably construct ZnO-base heterostructures, unique ZnO hexagonal quasi-hourglasses have been synthesized by a microwave-assisted hydrothermal approach. The phase purity and the morphologies of as-prepared samples have been determined by using X-ray powder diffractometer, field-emission scanning electron microscopy and transmission electron microscopy. We have rationally discussed the growth and reaction mechanism and revealed the morphological evolution of ZnO hexagonal quasi-hourglasses. Dodecylamine, as well as the initial concentration of zinc source, the reaction temperature and time, play an important part in the synthesis of ZnO hexagonal quasi-hourglasses. Between ZnO and Zn 5 (OH) 8 (NO 3 ) 2 , a reversible reaction seldom reported occurs in a circular manner as the reaction proceeds continuously. The presence of ZnO multipods in the products and the controllable synthesis of half of ZnO hexagonal quasi-hourglass betoken a possibility to synthesize ZnO hierarchical architectures, even ZnO-base heterostructures by using this kind of ZnO building blocks.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
RAPID COMMUNICATIONS IN MASS SPECTROMETRY
·
2020
·Vol. 34
·期 21
·e8893
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IF 2.2
Yunfeng Chai,Hongping Chen,Chengyin Lu
Rationale Loss of carbon dioxide is an important characteristic fragmentation reaction of deprotonated benzoic acid and its derivatives in electrospray ionization mass spectrometry. However, researchers have rarely noticed or believed that the loss of carbon dioxide in multistage mass spectrometry is a “reversible reaction,” that is, the fragment anion generated by carbon dioxide loss can capture another carbon dioxide to regenerate its precursor ion. Methods The fragmentation of the [M − H] − ions of dicamba (3,6-dichloro-2-methoxybenzoic acid) and benzoic acid was performed with an electrospray ionization hybrid quadrupole-orbitrap mass spectrometer. The structural confirmation of the precursor ions and their product ions was supported by accurate mass (elemental composition) analysis. Pseudo-MS 3 experiments (in-source collision-induced dissociation as MS 2 ) and isotope labelling experiments were used to confirm the addition of carbon dioxide to the product ions in MS 2 . Results In the fragmentation of deprotonated dicamba ( m / z 219), the relative abundance of the precursor ion does not decrease significantly or even increases as the collision energy increases. When the m / z 145 and 175 product ions were isolated in the mass analyzer, the ions 44 m / z units larger ( m / z 189 and 219) were generated spontaneously, indicating the formation of carbon dioxide adduct ions. In the fragmentation of deprotonated [ carboxyl - 13 C]-benzoic acid ( m / z 122), a deprotonated [ carboxyl - 12 C]-benzoic acid ion ( m / z 121) was generated which was derived from 13 CO 2 loss and 12 CO 2 addition. The isotope labelling experiment further supports the formation of CO 2 -attached ions in the fragmentation of deprotonated benzoic acids. Conclusions Under collisional activation, deprotonated dicamba and benzoic acids easily undergo carbon dioxide loss, but the decarboxylated product anions have an appropriate nucleophilicity to carbon dioxide and they can capture a background carbon dioxide molecule remaining in the vacuum system to regenerate the precursor ions. This study provides a new and deeper understanding of the gas-phase chemistry of deprotonated benzoic acid derivatives in mass spectrometry.
研究领域:
分析化学
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质谱学
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DOI
PubMed
高影响因子
International Journal of Greenhouse Gas Control
·
2019
·
IF 3.231
Fangfang Li,Yinge Bai,Shaojuan Zeng,Xiaodong Liang,Hui Wang,Feng Huo,Xiangping Zhang
Protic ionic liquids (PILs) are considered as potential solvents for CO 2 capture due to their simple synthetic routes and unique properties. In this work, three low viscous PILs, tetramethylgunidinium imidazole ([TMGH][Im]), tetramethylgunidinium pyrrole ([TMGH][Pyrr]) and tetramethylgunidinium phenol ([TMGH][PhO]) were synthesized and the effect of anions, temperature, CO 2 partial pressure and water content on CO 2 absorption performance of PILs was also systematically studied. It was found that the PILs with larger basicity show higher CO 2 absorption capacity, and [TMGH][Im] simultaneously shows relatively high absorption rate and CO 2 absorption capacity of 0.154 g CO 2 /g IL at 40 °C, 1 bar. The addition of H 2 O has a positive effect on gravimetric absorption capacity of CO 2 at the range of 0–20 wt% H 2 O, and the highest capacity of 0.186 g CO 2 /g IL was achieved as the water content was 7 wt%. In situ FTIR, 13 C NMR and theoretical calculations verified that more stable bicarbonate are produced during CO 2 absorption by [TMGH][Im]-H 2 O system. However, neat [TMGH][Im] can react with CO 2 to form the reversible carbamate, leading to excellent recyclability after four absorption-desorption cycles. The results implied that neat [TMGH][Im] shows great potentials in CO 2 absorption applications.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Decheng Li,Guyue Li,Yifan Yu,Chilin Li
Fluoride ion batteries (FIBs) have garnered significant attention due to their ultrahigh theoretical energy density, dendrite-free safety, and resource abundance. Although some anion acceptors have been proposed to address the insolubility of inorganic fluoride salts, the difficulty in dissociating fluoride ions from acceptors results in short lifespan and extremely low specific capacity of FIBs. Here, a fluoride ion battery is demonstrated with unprecedented long life and ultrahigh specific capacity through the design of an acceptor-multi-F state electrolyte. The high Lewis acidity of triphenylantimony chloride (TSbCl) as a novel anion acceptor in electrolyte facilitates the complete dissociation of CsF, and the resulting TSbCl-F complex can further interact with fluoride ions to form the acceptor-multi-F states. This strategy combines the high dissociation capability for fluoride salts with the minimal thermodynamic barriers for releasing fluoride ions at electrode-electrolyte interface. This electrolyte design endows FIBs with durable reversible fluorination/defluorination reaction (3700 cycles with high coulombic efficiency of 99.5% and small voltage polarization of 30 mV) and ultrahigh reversible capacity (580 mAh g −1 after 40 cycles at 100 mA g −1 ). The high-output voltage FIBs of CuF 2 //Li configuration (with discharge plateau of 2.9 V) and larger-sized pouch-type FIBs of CuF 2 //Sn+SnF 2 configuration (with reversible capacity of 530 mAh g −1 ) are demonstrated.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TETRAHEDRON
·
2014
·
IF 2.817
Haiyang Liu,Xuejuan Wan,Liqiang Gu,Tianqi Liu,Youwei Yao
An easily accessible ferric ion (Fe 3+ ) fluorescence chemosensor was designed and synthesized via microwave reaction based on rhodamine derivative. This sensor displayed a favorable selectivity for Fe 3+ ion over a range of other common metal cations in acetonitrile/Tris buffer (4:1, v/v, pH 7.0) with a 1:1 stoichiometry , leading to prominent fluorescence OFF–ON switching of the rhodamine fluorophore. The association constant between the sensor and Fe 3+ was determined to be 1.51×10 5 , and the corresponding detection limit was calculated to be 3.2×10 −7 M according to fluorescence titration analysis. The recognizing behavior of the chemosensor toward Fe 3+ has been investigated in detail by FTIR, NMR , and HRMS measurements. Additionally, the recognition process of the chemosensor for Fe 3+ is chemically reversible on the addition of phosphate anion ( PO 4 3 − ) .
研究领域:
分析化学
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生物化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）