Solar RRL
·
2021
·Vol. 5
·期 9
·2100352
·
IF 8.582
Liqun Yang,Xiaohui Ma,Xueni Shang,Deyu Gao,Chen Wang,Mengjia Li,Cong Chen,Boxue Zhang,Sai Xu,Shijian Zheng,Hongwei Song
Defect passivation has been a promising route for enhancing the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs). Herein, defect inhibition in two-step solution-processed (FAPbI 3 ) 1− x (MAPbBr 3 ) x films via a rationally designed zwitterionic ionic liquid (ZIL) with 4-fluoro-phenylammonium (4FB + ) as cations and tetrafluoroborate (BF 4 − ) as anions is demonstrated. First, 4FB + and BF 4 − can effectively fill vacancy defects caused by the migrated organic A-site cation and halogen anion, confirmed by X-ray photoelectron spectroscopy. Second, the 4FB + with π conjugated benzene ring can donate electrons for carrier extraction, whereas its fluorination of the phenyl ammonium could enhance moisture blocking through the molecular packing of C F bond. The electrical characterization, including space charge limited current and Mott–Schottky measurement, proves the enhanced carrier extraction and photovoltaic performance. Third, the pseudohalogen anion BF 4 − with high ionic conductivity could significantly enhance the carrier lifetime and reduce the V OC loss. As a result, the ZIL-modified PSCs can achieve a high PCE of 22.5% with excellent long-term stability maintaining more than 80% of the initial efficiency after storing in an ambient condition for 2000 h. Herein, a new paradigm toward accelerating the development of efficient and stable PSCs is opened up.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
·
2021
·
IF 2.917
Ai-min LIU,Yu YAO,Meng-xia GUO,Yu-bao LIU,Zhong-ning SHI,Feng-guo LIU,Xian-wei HU,Wen-cai HE,Zhao-wen WANG
The density, conductivity, and viscosity of the 1,3-dimethyl-2-imidazolinone and lithium nitrate (DMI– LiNO 3 ) solvated ionic liquid were measured as a function of temperature. Additionally, the electrochemical mechanism and electrodeposition of neodymium from the DMI–LiNO 3 solvated ionic liquid were investigated. Cyclic voltammetry results indicate that the electrochemical reduction of Nd(III) is irreversible and proceeds via one-step with three-electron transfer, which is controlled by diffusion with a diffusion coefficient of 5.08×10 −8 cm 2 /s. Energy- dispersive X-ray spectrometry and X-ray photoelectron spectroscopy data confirm that the electrodeposit obtained after electrodeposition at −4 V (vs Ag) using the DMI–LiNO 3 –Nd(CF 3 SO 3 ) 3 solvated ionic liquid contains metallic neodymium.
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Green Energy & Environment
·
2019
·
IF 0
Yu-Mei Liu,Yan Zhou,Wen-Qiang Gong,Zhang-Min Li,Chao-Li Wang,Duan-Jian Tao
The catalysis of ionic liquids (ILs) in the traditional stirred reactor suffers from insufficient mass and heat transfer, which always needs a long reaction time and results in a low reaction rate. In this work, highly efficient synthesis of 1-methoxy-2-propanol via the alcoholysis reaction of propylene oxide (PO) with methanol was proposed and achieved by the combination of micro-tubular circulating reactor with the IL [N 4444 ][Buty] catalyst. Compared with the stirred reactor, the rate of alcoholysis reaction in a micro-tubular circulating reactor was found to be significantly improved. The reaction time was remarkably shortened to 20 min from 180 min as well as the yield of 1-methoxy-2-propanol reached 92%. Moreover, the kinetic study further demonstrated that the main reaction rate to 1-methoxy-2-propanol (K 1 ) was about 20 times larger than the side reaction rate to byproduct 2-methoxy-1-propanol (K 2 ) in the temperature range of 363–383 K. Such combination of micro-tubular circulating reactor with IL catalysts is believed to be a class of effective process intensification technique for highly efficient synthesis of 1-methoxy-2-propanol.
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IONICS
·
2019
·Vol. 26
·期 5
·2225-2231
·
IF 2.289
Liu Lili,Wang Xiaoyang,Zhang Xiaohong,Zhang Xiuyun,Chen Shimou
Germanium-based materials as anode can improve the capacity of lithium-ion battery because of its excellent lithium-ion storage ability. But the application of Ge anode is hampered by the huge volume variation during de/lithiation processes. Herein, a Ge/Cu wire mesh (Ge/Cu-WM) electrode is prepared by ionic liquid electrodeposition, where the Ge nano-film is deposited on Cu wire mesh. The unique structure of Ge/Cu-WM electrode not only buffers the volume expansion but also enhances electron migration and electron transport during lithiation. The Cu 3 Ge is observed by XRD, which confirms that the Ge nano-film tightly attach to the Cu wires. All structural properties give the electrode excellent electrochemical performance, where a capacity of 633 mAh/g after 100 cycles at 0.1 C is obtained. The reasonable structure and improved cycling stability make Ge-based anodes highly attractive for lithium-ion battery applications.
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FUEL
·
2019
·
IF 5.128
Bihong Lv,Junhai Wu,Chengrui Lin,Zuoming Zhou,Guohua Jing
Due to its excellent and reversible CO 2 uptake, the novel aprotic heterocyclic anion-based dual functionalized ionic liquid solution ([DETAH][AHA]) presented as an efficient candidate for CO 2 capture. The kinetics of CO 2 capture into [DETAH][AHA] solutions, e.g., [DETAH][Im] and [DETAH][Tz], was studied by using a double-stirred cell, with concentrations ranging from 0.25 to 1.0 mol/L and temperatures from 303 to 333 K. The overall first-order reaction rate constants ( k ov ) and the secondary-order reaction rate constants ( k 2, FIL ) of CO 2 capture into this two [DETAH][AHA] solutions were obtained, and they all increased as the temperature increased. The relationship between k 2, FIL and reaction temperature was determined by Arrhenius equation, which expressed as k 2 = 1.0365 × 10 12 exp - 5873.67 T and k 2 = 3.5361 × 10 12 exp - 6380.60 T , respectively. The calculated activation energies of such two solutions were 48.83 kJ/mol and 53.05 kJ/mol, respectively. From the heat duty evaluation, the total CO 2 regeneration energy consumption of [DETAH][Im] and [DETAH][Tz] were respectively 2.94 and 2.84 GJ·mol −1 CO 2 , which were all less than that of traditional MEA solution due to their lower desorption reaction heat. A fast absorbent rate, a lower activation energies and regeneration energy consumption of [DETAH][AHA] solutions indicate greater potential and application prospects.
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ENERGY & FUELS
·
2019
·
IF 3.021
Haiming Zhang,Bin Jiang,Na Yang,Na Zhang,Luhong Zhang,Zhaohe Huang,Xiaoming Xiao,Xiaowei Tantai
Ionic liquid (IL) aqueous solutions (aq) have emerged as promising candidates for SO2 absorption. In this work, a new series of diamino polycarboxylate protic ionic liquids (DPPILs) aq with low viscosities and high stabilities were developed and used for SO2 capture. All of the prepared absorbents could efficiently absorb low-concentration SO2 in simulated flue gas. Among them, DPPILs aq based on citric acid (CA) presented the most excellent SO2 desorption performance; nearly all absorbed SO2 could be easily desorbed under mild conditions. Particularly, N,N-dimethylethylenediamine citrate [DMEDA][CA] showed the highest available absorption capacity toward 0.2 vol % SO2 (up to 0.51 molSO2/molILs and 0.058 gSO2/gabs in 50 wt % aq at 20 °C), which also presented satisfactory SO2/CO2 selectivity, reusability, and SO2 removal efficiency. Fourier transform infrared and nuclear magnetic resonance spectroscopic analyses revealed that the protonation of [DMEDA]+ and [CA]− promoted SO2 absorption. Overall, the studied DPPILs aq with excellent physical properties, SO2 absorption–desorption performance, and stability may have a great perspective in industrial SO2 removal.
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CHIRALITY
·
2019
·Vol. 31
·期 10
·824-834
·
IF 1.927
Shiyu Chen,Xiaoxia Huang,Shun Yao,Wencai Huang,Yin Xin,Minghui Zhu,Hang Song
Several amino acid chiral ionic liquids were introduced as functional monomers to prepare molecularly imprinted polymers for specific recognition of L-phenylalanine. Among them, the imprinted polymers L-Phe@MIPs based on [ViImC3][L-Pro] showed the best selective recognition ability for L-phenylalanine. A series of experiments such as dynamic adsorption, static adsorption, and competitive adsorption were conducted to investigate the specific recognition ability and adsorption capacity of the L-Phe@MIPs. It is found that the adsorption efficiency to L-phenylalanine on L-Phe@MIPs was 3.11 times higher than that to D-phenylalanine. All the results demonstrated that the L-Phe@MIPs possessed good recognition and relatively high adsorption efficiency for L-phenylalanine. Besides, the recovery of L-phenylalanine was above 98%, and the L-Phe@MIPs exhibited good reusability.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 30
·12013-12019
·
IF 3.069
Xiangju Mao,Lu Liu,Fang Xiao,Wenshan Ni,Xintao Cheng
A novel monolithic column was developed with 4-vinylbiphenyl and an ionic liquid as the functional monomers and ethylene dimethacrylate as the cross-linker by thermal copolymerization for reversed-phase capillary electrochromatography. For this monolithic column, an imidazole ionic liquid, 1-allyl-3-methylimidazolium chloride, was introduced as the generator of electroosmotic flow. The composition of the polymerization mixture for the preparation of the monolithic column was optimized in detail. Characterization using scanning electron microscopy and Fourier transform infrared spectroscopy indicated that the monolithic column is synthesized successfully with excellent porous structure. Successful baseline separation of aromatic compounds, phenols and anilines with high resolution and high column efficiency demonstrates that the obtained monolithic column has powerful reversed-phase chromatography performance. The relative standard deviation of the retention time for run-to-run (n = 5), day-to-day (n = 5) and column-to-column (n = 3) is in the range of 0.39–1.30%, 0.68–3.92% and 1.06–3.66%, respectively, which shows the monolithic column possesses good reproducibility. This novel monolithic column has been successfully applied for the separation of phenols in spiked lake water samples.
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RSC Advances
·
2020
·Vol. 10
·期 4
·2085-2095
·
IF 3.119
Bingyan Yin,Wenqing Xu,Chengjun Liu,Miqiu Kong,Yadong Lv,Yajiang Huang,Qi Yang,Guangxian Li
Poly(ionic liquid) (PIL), integrating the characteristics of both polymers and ionic liquid, is synthesized and employed to modify diglycidyl-4,5-epoxy-cyclohexane-1,2-dicarboxylate (TDE-85). With the addition of PIL, the fracture toughness, and thermal and dielectric performances of TDE-85 were discovered to be simultaneously improved, meanwhile the tensile modulus and strength is increased. Upon an optimal loading of 3 wt% PIL, the critical stress intensity factor (KIC), tensile modulus and strength are raised by 92.9%, 13.3% and 10.7%, respectively. Multi-toughening mechanisms due to spherical domains of PIL formed in TDE-85 during curing are responsible for the improved toughness. Moreover, the dielectric and thermal properties of TDE-85 are also enhanced by adding PIL. With the optimal addition of 5 wt% PIL, the dielectric constant of the composites is enhanced by 62.5%, the glass transition temperature is increased by 16.58 °C and the residual weight of carbon is increased by 59%.
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ChemSusChem
·
2019
·Vol. 12
·期 17
·4005-4013
·
IF 7.804
Ying Kang,Xingmei Lu,Guangjin Zhang,Xiaoqian Yao,Jiayu Xin,Shaoqi Yang,Yongqing Yang,Junli Xu,Mi Feng,Suojiang Zhang
Graphical UV light on lignin : An efficient self-initiated radical photochemical strategy for degradation of lignin-derived aryl ethers and lignin through ionic liquids induction is developed. In the homogeneous system, the C−C/C−O bonds can be cleaved efficiently through a free-radical-mediated reaction, affording aromatic products in high yields under mild conditions. The degradation of lignin into aromatic products is very important, but harsh conditions and metal-based catalysts are commonly needed to cleave the inert bonds. Herein, an efficient self-initiated radical photochemical degradation for lignin-derived aryl ethers through ionic liquids (ILs) induction is demonstrated. The C−C/C−O bonds can be cleaved efficiently through free-radical-mediated reaction in the binary-ILs system 1-propenyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl] imide [PMim][NTf 2 ] and the Brønsted acid 1-propylsulfonic-3-methylimidazolium trifluoromethanesulfonate ([PrSO 3 HMim][OTf]) under ambient conditions. [PMim][NTf 2 ] initiates the reaction by promoting the cleavage of the C β −H bond, and [PrSO 3 HMim][OTf] catalyzes the subsequent C−O−C bond fragmentation. Furthermore, alkyl, hydroxyl, and peroxy radicals are detected, which suggests degradation based on a photochemical free-radical process. Additionally, alkali lignin could also be degraded in the IL system. This work sheds light on sustainable biomass utilization through a self-initiated radical photochemical strategy under metal-free and mild conditions.
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Wei Jiang,Jin Xiao,Lei Dong,Chao Wang,Hongping Li,Yaping Luo,Wenshuai Zhu,Huaming Li
The dispersity of heterogeneous catalysts in solid–liquid biphase reactions is of great importance to their catalytic performance. Herein, superhydrophobic magnetic carbon composite catalysts were synthesized by calcination of magnetic polyoxometalate-based poly(ionic liquid). The magnetic poly(ionic liquid) not only served as the carbon and Mo sources and reductant but also made MoOx uniformly disperse on the surface of amorphous carbon. The superhydrophobic catalyst MoOx/MC-600 with a calcining temperature of 600 °C had a superior catalytic activity, and the sulfur removal reached as high as 97.1%. In contrast, the sulfur removal was only 66.6% with the hydrophilic MoOx/MS-600 calcined without the polymer cation. When the reaction was finished, MoOx/MC-600 could be easily separated by a magnet and recycled at least seven times. Additionally, the existence of low-valence Mo and oxygen vacancies would promote the oxidative reaction.
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JOURNAL OF MEMBRANE SCIENCE
·
2018
·
IF 6.578
Haozhen Dou,Bin Jiang,Xiaoming Xiao,Mi Xu,Baoyu Wang,Li Hao,Yongli Sun,Luhong Zhang
Facilitated transport membranes (FTMs) for olefin/paraffin separations have failed to achieve commercial success due to the instability of carriers although great efforts have been made. In this work, ultra-stable and cost-efficient protic ionic liquid based FTMs (PIL-FTMs) were firstly prepared by utilizing the Brönsted acidic property of PILs to stabilize the carrier. The gas solubility in the carrier/PILs was measured and the separation performances of PIL-FTMs were evaluated systemically. The results indicated that the structure of PILs affected the C 2 H 4 permeability and the presence of ether group and hydroxyl group in PILs significantly enhanced the C 2 H 4 /C 2 H 6 selectivity. The carrier concentration led to structural variation of PIL-FTMs, thus manipulating the gas separation performances of PIL-FTMs. The increase of transmembrane pressure decreased C 2 H 4 permeability and C 2 H 4 /C 2 H 6 selectivity, indicating a typical feature of FTMs. The increase of temperature increased the C 2 H 4 permeability but decreased C 2 H 4 /C 2 H 6 selectivity. The separation performances of PIL-FTMs were much higher than other results in the literature. Furthermore, the PIL-FTMs exhibited excellent stability during the long-term experiments carried out for six months. Finally, the investigation of separation mechanism revealed that the hydrogen-bonding and coordinative interactions between PILs and carrier accounted for the high separation efficiency of PIL-FTMs. In all, the excellent long-term stability, outstanding separation performances and economic feasibility of PIL-FTMs could play an important role in moving these membranes toward industrial application.
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