ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Si-Yu Pan,Xue-Rui Yang,Yao Zhou,Chao Lv,Hao-Tian Deng,Ming-Jia Guo,Shou-Xiao Chen,Yi-Yang Hu,Li Deng,Yu Qiao,Jun-Tao Li,Ling Huang,Yong Yang,Shi-Gang Sun
Currently, lithium-ion batteries (LIBs) are assembled with polar electrolytes; thus, resulting SEI layers are dominated with organics. Herein, a low-polarity electrolyte is formulated with a low-polarity solvent (tetraethyl silicate, TEOS) and a non-polar inert shielding co-solvent (cyclohexane, CYH); solvation behaviors of lithium salt are investigated. The use of such a low-polarity solvent is found to improve the fraction of anions in the solvation sheath of Li+, and the presence of the non-polar co-solvent further shields the reductive decomposition of the solvent on the anode. The resulting SEI layer is relatively rich in LiF and has a 3D cross-linked Si–O network as a skeleton from the decomposition of TEOS molecules, which is more robust to tolerate the damage from the volume expansion of silicon. A Si-nanoparticle-based anode in such a low-polarity electrolyte delivers a capacity as high as 1491 mAh g–1 after 200 cycles, outperforming those in the commercial polar electrolytes.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2017
·
IF 3.177
Yanyu Qi,Rui Kang,Jie Huang,Weidong Zhang,Gang He,Shiwei Yin,Yu Fang
We demonstrated for the first time that, at temperatures below the melting point of a given polar solvent, the emission of some four-coordinate monoboron complexes containing monoanionic bidentate (NO) ligands shifted to lower wavelengths, but no such shift was observed for studies conducted in nonpolar solvents. This means that the emission from a polar solvent appears at shorter wavelengths if compared with that from a nonpolar solvent when the measurement was performed at low temperatures, a phenomenon totally different from that observed for conventional solvatochromic fluorophores. The finding was rationalized by considering the temperature-dependent conformational relaxation of the tetrahedron monoboron complexes from their local excited (LE) state to their relaxed excited (RE) state. Further studies revealed that variating the structure of the chelating ligands could result in remarkable changes in the fluorescent colors of the monoboron complexes. However, changing the structure of other two monodentate ligands showed little effect upon the fluorescence property of the compounds. Therefore, it is anticipated that the monoboron complexes may be taken as a platform to construct a variety of functional molecular systems via alternating the structure of the chelating ligand and that of the monodentate ligand. As an example, naphthalene was introduced as a monodentate ligand, and independent emissions from naphthalene unit and the other part of the monoboron complex as well as intramolecular energy transfer between them were observed. It is believed that the present work provides a new insight into the monoboron complexes, laying the foundation for them to be explored for developing novel molecular systems.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2019
·
IF 0
Luze He,Shuang Pan,Zhiqun Lin,Juan Peng
Despite recent impressive advances in the synthesis of all-inorganic perovskite CsPbX3 (X = Cl, Br, and I) via facile solution-based approaches, it remains challenging to achieve well-defined morphologies of interest, particularly one-dimensional (1D) nanowires. Herein, we report a robust polar-solvent-assisted route to 1D CsPbBr3 nanowires via room temperature supersaturated recrystallization. Notably, compared to CsPbBr3 nanocubes synthesized in the absence of polar solvent acetonitrile (ACN), upon the introduction of a suitable amount of ACN into antisolvent toluene, CsPbBr3 nanowires are rapidly yielded, experiencing a cubic-to-orthorhombic phase transformation and a blue-shifted emission. The formation mechanism of CsPbBr3 nanowires can be qualitatively understood on the basis of the role of ACN as a structure-directing agent. Intriguingly, the addition of ACN renders an accelerated anion-exchange reaction between CsPbBr3 and halide salts (i.e., Br-to-Cl and Br-to-I exchanges) due to improved dissolution of the halide ions in ACN. The polar solvent-directed growth strategy may represent an effective means of expanding the diversity of morphologies accessible to perovskite nanocrystals. As such, it facilitates an investigation into the dimension-dependent optical and optoelectronic properties of perovskite-based nanomaterials and devices. These CsPbBr3 nanowires can be potentially used for nanoscale photonic, electronic, and optoelectronic devices, including photodetectors, light-emitting diodes, lasers, and solar cells.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
DOI
AICHE JOURNAL
·
2022
·Vol. 68
·期 9
·e17795
·
IF 4.167
Chongchong Chen,Xiaoli Wu,Jie Zhang,Jingjing Chen,Xulin Cui,Wenpeng Li,Wenjia Wu,Jingtao Wang
Two-dimensional lamellar membranes are promising for efficient molecule transfer, while the underlying transfer mechanism is rarely elucidated. Herein, heterostructured nanosheets are prepared by self-assembling small-sized hydrophilic cyanuric acid melamine and hydrophobic g -C 3 N 4 nanosheets. Resultant lamellar membranes show comparable affinity to polar and nonpolar solvents, allowing them to dissolve on membrane surface and diffuse through membrane channels. Results demonstrate that for lamellar membranes with distinct wettability, the permeance difference for polar solvents is originated from dissolution and diffusion processes, while that for nonpolar solvents is stemmed from dissolution process. Accordingly, corresponding equations which are suitable for heterostructured lamellar membranes are established. Importantly, polar solvents are induced to form ordered arrangement in hydrophilic nanodomains and then maintain the ordered state in hydrophobic nanodomains, affording a low-resistance transfer and high acetonitrile permeance of 1025 L m −2 h −1 bar −1 . In contrast, nonpolar solvents with disordered arrangement exhibit lower permeance than that of polar ones.
研究领域:
材料科学
·
化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Joule
·
2022
·
IF 46.048
Sunmiao Fang,Jidong Li,Ying Xu,Chun Shen,Wanlin Guo
The conversion of ambient heat into electricity through ubiquitous natural evaporation offers hope for new green energy technologies. So far, evaporation-induced electricity has relied mainly on the classical streaming potential, which is an electric potential generated by driving an electrolyte through a narrow channel under a pressure gradient. Here, we show that evaporation of ethanol from nanostructured carbon films can produce a sustainable volt-level potential in an environment free from the streaming potential, which we term the evaporating potential. This evaporating potential is proven to occur within a narrow partially wetted region ahead of the main capillary film and is directly generated by carrier transfer driven by evaporation of ethanol molecules. It is also shown that other polar solvents can generate potentials comparable to those induced by ethanol. The finding could open a new way to harvest environmental energy through natural processes.
研究领域:
能源科学
·
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Acta Biomaterialia
·
2020
·
IF 7.242
Junjun Tan,Yang Liu,Jing Gong,Xiaoying Jin,Cheng Cheng,Rong Zhang,Minfang Chen
Hydroxyapatite (HA) nanorods in the collagen matrix of bone have a macroscopically ordered structure that has many similarities to the ordered structure of anisotropic nano-units in inorganic liquid crystals (LCs). Inspired by these similarities, we conducted the first (to our best knowledge) synthesis of HA LCs in non-polar solvents (such as cyclohexane and toluene), thus expanding the range of applicable monomers and polymers. We synthesized HA nanorods by a simple, effective, and oleic-acid-assisted hydrothermal route. The hydrothermal temperature directly modulates the aspect ratio of the HA nanorods, and indirectly modulates their LC behavior. The LC phase transition has no size limitation. Thus, our approach may be used to develop high solid content, macroscopically assembled, large-scale polymer-based bio(mimetic)-materials.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2024
·
IF 5.3
Chao Li,Tie Geng,Ju Huang,Cheng Zhang,Ming Duan,Shenwen Fang,Xinliang Li,Shuai Liu
With the large-scale development of shale gas , oil-based drilling fluids have found widespread application. However, a significant challenge arises in removing small harmful solids of oil-based drilling fluids after multiple uses. Investigating the stable mechanism of harmful solids in nonpolar solvents is crucial for their removal. Here, kaolin is chosen as the harmful solid phase. Various surfactants sodium bis(2-ethylhexyl) sulfosuccinate (AOT), sorbitan monooleate (Span 80), sorbitan trioleate (Span 85), cetyltrimethylammonium bromide (CTAB), oleic acid (OA), and stearic acid (SA) are used as dispersants to explore the dispersibility and stability mechanisms of kaolin in the oil phase. Results reveal that the Span 80 and Span 85 exhibit the best dispersibility and rheological performance for kaolin, followed by AOT, while SA shows the poorest dispersibility and rheological performance. Except for SA and CTAB, the other dispersants significantly improve the wettability of kaolin particles. X-ray diffraction (XRD) results indicate that all dispersants adsorb on the surface of kaolin. FT-IR and XPS confirm that nonionic surfactants Span 80 and Span 85 adsorb on the surface of kaolin through hydrogen bonding . Strong Zeta potential on the particle surface suggests that Span 80 and Span 85 stabilize the kaolin system through electrostatic repulsion mechanisms.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Long Xia,Liu Xiao-Chi,Yang Yan-Yi,Dai Jia-Qing,Cao Jue-Xian,Hu Yong
Gaining insights into charge transport related to conformational changes and ion transport in valinomycin (VM) is crucial for understanding the underlying physiological processes and advancing ion carrier applications. Observing these processes in single molecules provides deeper insights and precision than those obtained through conventional ensemble measurements. Herein, we employed a single-molecule conductance measurement method based on the scanning tunneling microscopy break-junction (STM-BJ) to measure the charge transport of individual VM molecules in both non-polar and polar solvents, as well as when mediated by K + ions. Single-molecule conductance measurements revealed that the bracelet and propeller-type conformations of VM in both non-polar and polar solvents significantly affect its conductance. In polar solvents, the propeller-type conformation of VM demonstrated a well-defined conductance signature, single-molecule rectification feature, and through-space transmission mechanism. Specifically, the introduction of K + ions in polar solvents induced a conformational transition from the propeller-type to the bracelet-type form, facilitating K + binding recognition. These observations were further supported by density functional theory combined with non-equilibrium Green’s function calculations. This study enhanced the fundamental understanding of the electronic transport mechanisms in VM and valinomycin-K + molecular junctions, offering insights into VM ionophores and promoting supramolecular sensing applications. Graphical abstract
研究领域:
生物物理学
·
纳米科技
·
理论化学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2021
·
IF 3.882
Shuping Zhao,Bing Liu
Colloidal particles in a nonpolar media are closely correlated to industrial applications in particular particle-based electrophoretic display techniques. However, the synthesis of the commonly used poly(12-hydroxystearic acid)(PHSA)-based stabilizers for the dispersion polymerization of polymer particles in nonpolar solvent are troublesome. We report a sorbitan trioleate (Span 85)-based macromolecular copolymer stabilizer that can be easily synthesized and used for the preparation of PMMA particles in a nonpolar solvent. This is realized by synthesizing random copolymers of methyl methacrylate (MMA) and polymerizable sorbitan trioleate (M-Span 85), and the latter can be synthesized from the commercial product Span 85. Using this stabilizer, the resulting PMMA particles have narrow size distribution and tunable diameters. With the stabilizers, transferring water-dispersible particles to a nonpolar solvent and further preparing core/shell particles was verified to be a useful route. This provides an effective approach for using water-dispersible functional nanoparticles in nonpolar environments. In addition, the prepared PMMA particles are demonstrated to be a useful model system to study crystallization or glass transitions by quantitative confocal microscopy.
研究领域:
材料科学
·
化学工程
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2022
·
IF 6.633
Chengjie Wang,Tian Lan,Jimin Xu,Hui Liu,Xiangyang Liu,Maogang He
Thermal conductivity plays a critical role in the screening and designing of ionic liquids (ILs) with good thermoelectric performance. With the newly developed two-wire 3ω method proven to eliminate the end effect by introducing a reference wire to the traditional 3ω method, the influence of additional polar solvents (water, ethylene glycol and ethanol) and temperature on the thermal conductivity of three ILs (1-ethyl-3-methylimidazolium dicyanoamide, 1-butyl-3-methylimidazolium dicyanamide and 1-butyl-3-methylimidazolium trifluoromethansulfonate) are investigated. It shows that the thermal conductivity of the three ILs can be reduced by the polar solvents with lower thermal conductivity. The negative temperature dependence of the thermal conductivity of three ILs is changed to be positive by water and weakened by ethylene glycol, but hardly affected by ethanol which also exhibits the negative trend. Experimental thermal conductivities are correlated by the second-order Scheffé polynomial with the average absolute relative deviations lower than 1.9%.
研究领域:
材料科学
·
热物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
·
2023
·
IF 11.1
Jie Qi,Yang Ge,Qingping Li,Xin Lv,Xiaojiang Li,Na Wang,Hongsheng Lu
Paraffin wax has caused obvious detrimental consequences to the extraction for fossil fuels, and posed environmental challenge due to the absence of cleaner methods for paraffin wax removal. A cleaner and sustainable approach for paraffin wax removal was developed using the switchable polarity solvents (SPS). Three SPS with low polarity, including dipropylamine (DPA), ethylbutylamine (EBA), and dibutylamine (DNBA) were selected for paraffin wax removal. Compared with bubbling CO 2 into SPS straightway, the transformation of the polarity quantified by normalized polarity energy confirms the addition of water is benefit to enlarge the polarity scope. Paraffin wax is removed at the initial state and separated at the final state by CO 2 -induced polarity transformation of SPS. The dissolution rates for paraffin wax of DPA and EBA reached 0.071 g/min and 0.062 g/min, which surpassed that of traditional solvents, such as o-xylene (0.045 g/min) and Petroleum ether (0.017 g/min), indicating that these selected SPS is suitable for paraffin wax removal. The paraffin wax dissolution behaviors of SPS can be accurately matched using modified Apelblat models with root-mean-square deviation of 1.085%. With the addition of water, more than 99% of paraffin wax is separated from DPA and EBA by introducing CO 2 within 10mins, which is a better alternative method for energy-intensive distillation process . The introduction of water is indispensable for improving the separation efficiency, since it enlarged the polarity difference between solvents and paraffin wax. The thermal behavior of separated paraffin wax detected by Differential Scanning Calorimetry remained steady, and there were negligible residual solvents detected indicate the feasible separation of paraffin wax. Both SPS and water are recovered upon N 2 /80 °C, which retain good recyclability for paraffin wax removal. These findings confirms the applicability of SPS in the sustainable and cleaner removal of paraffin wax. The use of SPS provides an alternative and promising approach for paraffin wax removal for ensuring the demands of low-energy consumption and environment.
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
·
2024
·
IF 3.9
Weijie Zhang,Yuxiang Zhang,Jingjing Xiao,Xiaowei Wang,Lei Liu,Jibin Han,Hui Wang,Anchao Feng
Lead halide perovskite has currently emerged as a research hotspot in the field of photocatalysis due to its exceptional photovoltaic characteristics. Despite its potential, the susceptibility to degradation under harsh conditions such as light, humidity, and polar solvents poses a significant challenge. To counteract this, a strategy employing silica to shield the perovskite surface is conducted, thereby enhancing its stability. The resulting composite MAPbBr 3 @SiO 2 is then deployed as a photocatalyst in the photoinduced electron/energy transfer reversible addition fragmentation chain transfer (PET-RAFT) polymerization of butyl acrylate within polar solvents. The catalytic performance across different RAFT polymerization systems including varying the RAFT reagents, catalyst concentrations, and solvent types is meticulously examined. Remarkably, with a photocatalyst loading of merely 0.004 wt% and under a blue light intensity of 6 mW/cm 2 , over 80% monomer conversion can be achieved in 4 h. Moreover, the molecular weight distribution ( Đ ) consistently remains within the narrow range of 1.0–1.2 across all experimental setups, which proves the controllable nature of the PET-RAFT process. Owning the advantages of low photocatalyst requirement, compatibility with polar solvents, and narrow molecular weight distribution, PET-RAFT polymerization mediated by MAPbBr 3 @SiO 2 holds promise for scalable manufacturing and industrial-scale applications. Graphical Silica-coated hybrid lead halide perovskite nanocrystals are prepared and applied as photocatalysts in a PET-RAFT polymerization within polar solvents. High monomer conversion rates and polymers with narrow molecular weight distribution can be achieved. The polymerization process is notably efficient and can be conducted with minimal photocatalyst amounts, underscoring the superior efficiency and broad applicability of our novel photocatalyst system.
研究领域:
材料科学
·
高分子化学
·
光催化领域
✓ 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）