CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Lijun Yang,Dongxue Wu,Jun Tang,Yawei Hao,Jingchuan Wang,Xiaochong Zhao,Pan Yang
A simple and environment friendly method for the synthesization of CH 3 NH 3 BF 4 , which exhibits high purity and yield. With close ionic radius, BF 4 − was doped into CH 3 NH 3 PbBr 3 perovskite as substitution of Br − to improve the chemical stability of lead halide perovskite. The results show that the doped-BF 4 − can increase the charge carrier lifetime of CH 3 NH 3 PbBr x (BF 4 ) (3-x) perovskite thin films, meanwhile decrease the rate of recombination. This is mainly due to the larger ionic radius of BF 4 − , which brings about a lower degree X-ray diffraction angle shift, wider ultraviolet visible spectrophotometer absorbance band, red-shift photoluminescence emission peak, and longer fluorescence lifetime.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2023
·Vol. 66
·期 4
·1073-1077
·
IF 9.6
Pei Huan,Wang Xuefei,Zhang Jie,Zhang Fangfang,Yang Zhihua,Pan Shilie
Fluorooxoborate has emerged as a promising system for exploring optical materials due to their rich structural chemistry and physicochemical properties, yet so far not fully studied. Herein, we report a new fluorooxoborate, Ba 2 B 9 O 13 F 4 ·BF 4 , which contains the greatest variety of structural basic units, [BO 3 ], [BO 2 F 2 ], [BO 3 F], and [BF 4 ], and exhibits unprecedented 1D infinite [B 18 O 26 F 8 ] tubes. The unique structure avoids the dangling bonds caused by terminal oxygens, which is beneficial to the large bandgap and deep-ultraviolet cutoff edge. This article expands the crystal structure of fluorooxoborates and contributes to the exploration of deep-ultraviolet optical materials in fluorooxoborate systems.
研究领域:
无机化学
·
材料科学
·
光学材料
·
晶体学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 7
·1476
·
IF 4.2
Haixia Xie,Lei Li,Jiawei Zhang,Yihao Zhang,Yong Pan,Jie Xu,Xingtian Yin,Wenxiu Que
With the rapid progress in a power conversion efficiency reaching up to 26.1%, which is among the highest efficiency for single-junction solar cells, organic–inorganic hybrid perovskite solar cells have become a research focus in photovoltaic technology all over the world, while the instability of these perovskite solar cells, due to the decomposition of its unstable organic components, has restricted the development of all-inorganic perovskite solar cells. In recent years, Br-mixed halogen all-inorganic perovskites (CsPbI3−xBrx) have aroused great interests due to their ability to balance the band gap and phase stability of pure CsPbX3. However, the photoinduced phase segregation in lead mixed halide perovskites is still a big burden on their practical industrial production and commercialization. Here, we demonstrate inhibited photoinduced phase segregation all-inorganic CsPbI1.2Br1.8 films and their corresponding perovskite solar cells by incorporating a 1-butyl-1-methylpiperidinium tetrafluoroborate ([BMP]+[BF4]−) compound into the CsPbI1.2Br1.8 films. Then, its effect on the perovskite films and the corresponding hole transport layer-free CsPbI1.2Br1.8 solar cells with carbon electrodes under light is investigated. With a prolonged time added to the reduced phase segregation terminal, this additive shows an inhibitory effect on the photoinduced phase segregation phenomenon for perovskite films and devices with enhanced cell efficiency. Our study reveals an efficient and simple route that suppresses photoinduced phase segregation in cesium lead mixed halide perovskite solar cells with enhanced efficiency.
研究领域:
材料科学
·
能源技术
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2018
·
IF 3.927
Yaran Yin,Taotao Fu,Chunying Zhu,Rongwei Guo,Youguang Ma,Huaizhi Li
The evolution of the size and velocity of CO 2 bubble absorbed into MEA/[Bmim][BF 4 ] aqueous solutions was in-line investigated by a high-speed camera. The coupling effect between the variation of volume and the velocity of bubbles was highlighted. According to the evolution of average mass transfer coefficient, the mass transfer performance in the whole flow process was studied. The results indicated that both the length and velocity of bubble decreased gradually in the flow process due to mass transfer. A linear correlation between the relative velocity (the ratio of average bubble velocity to two-phase superficial velocity) and the relative lost length (the ratio of the lost length to the initial length) was proposed. The increase in overall liquid-phase volumetric mass transfer coefficient ( k L a ) at higher gas flow rate could be ascribed to the shorter residence time and larger specific surface area. While the increase of k L a at higher liquid flow rate and MEA or [Bmim][BF 4 ] concentration was resulted from intensified mass transfer. An empirical correlation of overall liquid-phase volumetric mass transfer coefficient was proposed taking the gas-phase Reynolds number, liquid-phase Reynolds number and Damköhler number into account.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Wei Zhai,Hua-jun Zhu,Long Wang,Xiao-min Liu,Hui Yang
The ionic liquid of 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BF 4 ) is selected as plasticizer to prepare a series of novel gel polymer electrolytes due to its non-volatility and inflammability. The micro-porous matrix employed in this study is poly(vinylidene fluoride-co-hexafluoropropylene)/poly(methyl methacrylate) (PVDF-HFP/PMMA) membrane synthesized via phase inversion. The effect of the ratio of PVDF-HFP to PMMA on the properties of the micro-porous membrane, such as morphology, porosity and the liquid uptake capability are systematically studied. Thermal and electrochemical properties of the resulting gel polymer electrolyte are also studied with the objective to optimize the quality of the micro-porous gel polymer electrolyte. The results indicate that the micro-porous gel polymer electrolyte MIL-60, derived from the matrix of PMMA-60 (40 wt% PVDF-HFP and 60 wt% of PMMA), presents the lowest glass transition temperature and exhibits the highest ionic conductivity . The LiFePO 4 /MIL-60/Li coin-typed cell cycled at 0.1 C shows the 1 st discharge capacity up to 157 mAh·g −1 , and remains 151 mAh·g −1 on the 50 th cycle.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Batteries-Basel
·
2024
·Vol. 10
·期 3
·102
·
IF 4.6
Xingyun Zhang,Kailimai Su,Yue Hu,Kaiyuan Xue,Yan Wang,Minmin Han,Junwei Lang
The zinc anode mainly faces technical problems such as short circuits caused by the growth of dendrite, low coulomb efficiency, and a short cycle life caused by side reactions, which impedes the rapid development of aqueous zinc-ion batteries (AZIBs). Herein, a common ionic liquid, 1,1-Spirobipyrrolidinium tetrafluoroborate ([SBP]BF4), is selected as a new additive for pure ZnSO4electrolyte. It is found that this additive could regulate the solvation sheath of hydrated Zn2+ions, promote the ionic mobility of Zn2+, homogenize the flux of Zn2+, avoid side reactions between the electrolyte and electrode, and inhibit the production of zinc dendrites by facilitating the establishment of an inorganic solid electrolyte interphase layer. With the 1% [SBP]BF4-modified electrolyte, the Zn||Zn symmetric cell delivers an extended plating/stripping cycling life of 2000 h at 1 mA cm−2, which is much higher than that of the cell without additives (330 h). As a proof of concept, the Zn‖V2O5battery using the [SBP]BF4additive shows excellent cycling stability, maintaining its specific capacity at 97 mAh g−1after 2000 cycles at 5 A g−1, which is much greater than the 46 mAh g−1capacity of the non-additive battery. This study offers zinc anode stabilization through high-efficiency electrolyte engineering.
研究领域:
材料科学
·
电化学
·
能量存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2026
·Vol. 47
·期 4
·60
·
IF 3.6
Aljasmi Abdullah,Mohammad Abubaker A.,AlJimaz Adel S.,AlKhaldi Khaled H. A. E.,AlTuwaim Mohammad S.
Density, refractive index, viscosity, surface tension, and speed of sound were experimentally determined and analyzed for [C 2 mim][MeSO 4 ], [C 2 mim][EtSO 4 ], [C 2 eim][EtSO 4 ], [C 4 mpy][BF 4 ] and [C n py][BF 4 ] ( n = 3, 4, 6) at atmospheric pressure and temperatures ranging from 293.15 K to 343.15 K. Expectedly, temperature exhibited the greatest impact on viscosity, as all properties decrease as temperatures increase. Linear temperature-dependent correlations were utilized for density, surface tension, refractive index, and speed of sound, while the Vogel–Fulcher–Tammann (VFT) model was applied to describe the temperature dependence of viscosity. The Laplace-Newton equation was used to calculate isentropic compressibility, and thermal expansion was calculated using the experimental density data. Furthermore, the study examined the impact of anion type and alkyl chain length on the thermophysical properties of the ionic liquids. The results reveal that the physical properties of the ionic liquids are significantly influenced by the anion type, whereas the alkyl chain length has a less significant impact. Density, speed of sound, and surface tension decrease as the length of the alkyl chain increases, while viscosity and refractive index exhibit opposing trends. Additionally, the experimental data obtained in this study is compared to theoretical models for density, surface tension, and speed of sound.
✓ 已验证
产品关联
DOI
高影响因子
AUSTRALIAN JOURNAL OF CHEMISTRY
·
2019
·Vol. 72
·期 7
·533-541
·
IF 1.226
Sai Huang,Mei Yang,Xin-Yu Deng,Qian Jiang Zhu,Ying Huang,Zhu Tao,Kai Chen
In the present work, a host–guest system of a hemimethyl-substituted cucurbit[6]uril derived from 3α-methyl-glycoluril (HMeQ[6]) and a hemicyanine dye, trans-4-[4-(dimethylamino)styryl]-1-methylpyridinium iodide (t-DSMI) showing strong fluorescence emission has been evaluated as a fluorescent probe. The results of a preliminary systematic study on the detection of a series of inorganic anions have revealed that this Q[n]-based host–guest fluorescent probe shows clear responses to BF4− and H2PO4− anions through distinct fluorescence quenching. Application of this Q[n]-based host–guest interaction system in anion recognition or detection opens a new avenue in Q[n] chemistry.
研究领域:
化学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Li Jing,Zheng Danxing,Fan Lihua,Wu Xianghong,Dong Li
The aim of this work is to investigate improving the effects for adding ionic liquids (ILs) to the working fluids of absorption cycle, lithium bromide aqueous solution (H2O + LiBr), and lithium chloride aqueous solution (H2O + LiCl). 1,3-Dimethylimidazolium chloride ([Dmim]Cl) and 1,3-dimethylimidazolium tetrafluoroborate ([Dmim]BF4) were selected to be additives. The vapor pressure data were measured for the H2O + LiBr + [Dmim]Cl system (LiBr/[Dmim]Cl mass ratio = 3), H2O + LiBr + [Dmim]BF4 system (LiBr/[Dmim]BF4 mass ratio = 2), H2O + LiCl + [Dmim]Cl system (LiCl/[Dmim]Cl mass ratio = 2), and H2O + LiCl + [Dmim]BF4 system (LiCl/[Dmim]BF4 mass ratio = 2) by means of the boiling point method, at temperatures from (303.60 to 439.42) K and the mass fraction of absorbent species from 0.20 to 0.70, respectively. The Antoine-type equation was used to correlate the experimental data of the ternary systems, and the agreements with the experimental data were excellent; that is, the average absolute relative deviations (ARDs) for pressure between experimental and calculated values were 1.05 %, 0.75 %, 0.63 %, and 0.92 % for the systems. Compared with traditional working fluids of absorption cycle, H2O + LiBr and H2O + LiCl, the promising results show that four ternary systems investigated in this work might be used as alternative working fluids to improve the performances of absorption cycles and liquid desiccant dehumidification systems.
研究领域:
热力学
·
制冷与空调
·
化学工程
·
离子液体应用
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2025
·
IF 3.6
Jing Xie,Lin Li,Jianlei Qi,Xuehai Wang,Haocheng Sun,Jianzhong Yin
The chemical recycling of polyethylene terephthalate (PET) faces challenges such as low depolymerization efficiency, harsh reaction conditions, and low product selectivity. In this study, 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF 4 ) ionic liquid (IL) was developed as a catalyst for methanolysis, achieving the efficient conversion of PET into the target monomer dimethyl terephthalate (DMT). The effects of temperature, time, IL amount, and methanol quantity on the reaction were systematically investigated. The degree of depolymerization and catalyst stability were systematically evaluated by multiscale characterization (spectroscopy, chromatography, thermal analysis, etc.). Experimental results indicated that when the PET/[Bmim]BF 4 ratio was 6:1 and the PET/methanol ratio was 1:6 (mass ratio), reaction at 200°C for 2 h, PET was completely converted (100%), and the yield of DMT reached 82.26%. [Bmim]BF 4 could be reused more than five times without significant decrease in PET conversion. The kinetic results showed that the reaction was in line with the first-order kinetic model, and the apparent activation energy was about 43.24 kJ/mol. DFT calculations suggested that [Bmim]BF 4 efficiently catalyzed the reaction by lowering the energy barrier of the key transition state. This study provides a solution with both high efficiency and industrial potential for the green chemical recycling of PET. Graphical The methanolysis of polyethylene terephthalate (PET) was catalyzed by 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) at 200°C for 2 h, achieving PET conversion (100%) and 82% yield of dimethyl terephthalate (DMT).
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Tong Su,Meiqiao Wei,Hanqing Liu,Yunshan Fang,Qiong Wu,Zhehui Weng,Jie Ling,Renjie Chen,Yulan Wang,Xiusha Zhao,Haidong Ju
Two new purely inorganic cationic tellurite networks of Group IB metal-based tetrafluoroborates, namely, [Cu2F(Te2O5)](BF4), 1, and [Ag18O2(Te4O9)4(Te3O8)(BF4)2]·2HBF4, 2, have been hydrothermally synthesized under mild conditions. The prepared materials have been characterized by single-crystal X-ray diffraction, powder X-ray diffraction, IR and Raman spectroscopy, SEM–energy-dispersive spectroscopy, UV–vis–NIR diffuse reflectance, magnetic study, and TG analyses. Single-crystal diffraction studies show that both materials have similar cationic Cu/Ag tellurite layers with tetrafluoroborates as interlamellar charge-balancing anions. Magnetic results indicate that [Cu2F(Te2O5)](BF4), 1, exhibits a mainly short-range antiferromagnetic ordering within the 2D layer, and further detailed analysis of magnetic susceptibility analysis confirms a spin-singlet ground state with an energy gap of 85 K.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2018
·
IF 3.886
Shichao Feng,Yuanyuan Wu,Jianquan Luo,Yinhua Wan
In this paper, AgBF 4 /[emim][BF 4 ] supported ionic liquid membranes (SILMs) were prepared successfully for CO/N 2 separation using nitrogen pressure immobilization procedures. The incorporation of AgBF 4 could decrease membrane weight loss, improve the pressure-resistant ability, and keep the critical pressure (0.45 MPa) of the SILMs. The high viscosity and undissolved AgBF 4 solids in membrane liquid would disturb gas molecular transport through membrane and give rise to the gas transport resistance. Therefore, the gas permeability decreased remarkably with increasing AgBF 4 carrier content in the membrane. When the molar ratio of AgBF 4 to [emim][BF 4 ] increased from 0:1 to 0.3:1, the CO/N 2 selectivity of the SILMs showed a great increase from ∼1 to ∼9 at 20 °C and 0.4 MPa, suggesting that AgBF 4 was an effective carrier for CO facilitated transport. The permeabilities of N 2 and CO increased at higher transmembrane pressure, indicating that molecular transport would dominate the transport process at high pressure. The temperature-dependent gas permeability followed the Arrhenius equation. Moreover, the differences between the activation energies of CO and N 2 became larger after introducing AgBF 4 , resulting in more obvious decrease in the CO/N 2 selectivity at higher operating temperature.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）