Showing papers by "Henan Normal University published in 2017"
TL;DR: The effects of anions, cations and functional groups on CO2 solubility and selectivity ofILs, as well as the studies on degradability of ILs are reviewed, and the recent developments on functionalized ILs, IL- based solvents, and IL-based membranes are discussed.
Abstract: The inherent structure tunability, good affinity with CO2, and nonvolatility of ionic liquids (ILs) drive their exploration and exploitation in CO2 separation field, and has attracted remarkable interest from both industries and academia. The aim of this Review is to give a detailed overview on the recent advances on IL-based materials, including pure ILs, IL-based solvents, and IL-based membranes for CO2 capture and separation from the viewpoint of molecule to engineering. The effects of anions, cations and functional groups on CO2 solubility and selectivity of ILs, as well as the studies on degradability of ILs are reviewed, and the recent developments on functionalized ILs, IL-based solvents, and IL-based membranes are also discussed. CO2 separation mechanism with IL-based solvents and IL-based membranes are explained by combining molecular simulation and experimental characterization. Taking into consideration of the applications and industrialization, the recent achievements and developments on the t...
613 citations
TL;DR: In this article, an ex situ electrochemical strategy for constructing an ultra-stable implantable solid electrolyte interphase (SEI) on a Li-metal anode was proposed.
438 citations
TL;DR: In this article, the synthesis of different functional carbons from poplar catkins via different processes for multi-purpose applications is described, and an oleophylic carbon aerogel derived from catkins is proven to be superoleophilic and porous enough to “wet” with oils and organic liquids and repel water completely to achieve oil/water separation.
332 citations
TL;DR: In this paper, the gaps between the coin and pouch cell were probed and the failure mechanism of a Li-S pouch cell was explored, and it was shown that Li metal powdering and the induced polarization are more responsible for pouch cell failure.
292 citations
TL;DR: In this article, the authors designed a facile and cost-effective route for the controllable synthesis of hollow sphere shaped Bi2WO6/reduced graphene oxide (RGO) composites, which can efficiently degrade five organic wastewater, including rhodamine B, methyl orange, phenol, sulfamonomethoxine and sulfanilamide.
246 citations
TL;DR: In this paper, a layered structural Co-MOF nanosheets were synthesized and then used as an electrode material for supercapacitors for the first time This material exhibited a high specific capacitance, a good rate capability, and an excellent cycling stability.
Abstract: Layered structural Co-MOF nanosheets were synthesized and then used as an electrode material for supercapacitors for the first time This material exhibited a high specific capacitance, a good rate capability, and an excellent cycling stability A maximum capacitance of 2564 F g-1 can be achieved at a current density of 1 Ag-1 Moreover, the capacitance retention can be kept at 958 % respectively of its initial value after 3000 cycles To the best of our knowledge, both the specific capacitance and the capacitance retention were the highest values reported for MOF materials as supercapacitor electrodes until now Such a high supercapacitive performance might be attributed to the intrinsic characteristics of this kind of Co-MOF material, including its layered structure, conductive network frame, and thin nanosheet
229 citations
TL;DR: In this paper, a pyrolysis of polyaniline (PANI)-coated Fe-based metal organic frameworks (MIL-101-Fe) was used to fabricate N-doped-carbon-coated F3O4 catalysts.
196 citations
TL;DR: The cross section for the process e^{+}e^{-}→π′+}π′-}J/ψ is measured precisely at center-of-mass energies from 3.77 to 4.60 GeV using 9 fb^{-1} of data collected with the BESIII detector operating at the BEPCII storage ring.
Abstract: The cross section for the process e(+)e(-)-> pi(+) pi(-) J/psi is measured precisely at center-of-mass energies from 3.77 to 4.60 GeV using 9 fb(-1) of data collected with the BESIII detector operating at the BEPCII storage ring. Two resonant structures are observed in a fit to the cross section. The first resonance has a mass of (222.0 +/- 3.1 +/- 1.4) MeV/ c(2) and a width of (44.1 +/- 4.3 +/- 2.0)MeV, while the second one has a mass of (4320.0 +/- 10.4 +/- 7.0)MeV/c(2) and a width of (101.4(- 19.7)(+25.3) +/- 10.2) MeV, where the first errors are statistical and second ones are systematic. The first resonance agrees with the Y(4260) resonance reported by previous experiments. The precision of its resonant parameters is improved significantly. The second resonance is observed in e(+)e(-)-> pi(+) pi(-) J/psi for the first time. The statistical significance of this resonance is estimated to be larger than 7.6 sigma. The mass and width of the second resonance agree with the Y(4360) resonance reported by the BABAR and Belle experiments within errors. Finally, the Y(4008) resonance previously observed by the Belle experiment is not confirmed in the description of the BESIII data.
181 citations
TL;DR: An online sequential prediction method for imbalanced fault diagnosis problem is proposed based on extreme learning machine and proves that, even existing information loss, the proposed method has lower bound of the model reliability.
177 citations
TL;DR: In this paper, high-porous carbon sheets were prepared from fresh clover stems under air atmosphere via a facile potassium chloride salt-sealing technique, which not only avoided using the high cost inert gas protection but also spontaneously introduced multi-level porosity into the carbon structure taking advantage of the trace of oxygen in the molten salt system.
175 citations
TL;DR: High concentrations of antibiotic residues found in hospital wastewater using solid-phase extraction and UPLC-MS/MS analysis suggest that highly abundant antibiotic-resistant pathogens and highly mobile ARGs already exist in the human body and that their release from hospitals without effective treatment poses high risks to environments and human health.
TL;DR: In this article, the authors performed density functional theory (DFT) calculations to investigate the various reaction mechanisms of CO oxidation catalyzed by the single Pd atom embedded defect-graphene system as well as the analysis of the structural and electronic properties.
TL;DR: In this paper, the gas evolution behavior in a working Li-sulfur (Li-S) battery based on the most widely used 1,3-dioxolane (DOL)/1,2-dimethoxyethane electrolyte was probed through gas phase chromatography, mass spectrum of as-produced gas in pouch cells, as well as the first-principles calculations and ab initio molecular dynamics.
TL;DR: The optimized SSO grows robustly, constitutively imports the unnatural triphosphates, and is able to indefinitely retain multiple UBPs in virtually any sequence context, creating a form of life that can stably store genetic information using a six-letter, three-base-pair alphabet.
Abstract: All natural organisms store genetic information in a four-letter, two-base-pair genetic alphabet. The expansion of the genetic alphabet with two synthetic unnatural nucleotides that selectively pair to form an unnatural base pair (UBP) would increase the information storage potential of DNA, and semisynthetic organisms (SSOs) that stably harbor this expanded alphabet would thereby have the potential to store and retrieve increased information. Toward this goal, we previously reported that Escherichia coli grown in the presence of the unnatural nucleoside triphosphates dNaMTP and d5SICSTP, and provided with the means to import them via expression of a plasmid-borne nucleoside triphosphate transporter, replicates DNA containing a single dNaM-d5SICS UBP. Although this represented an important proof-of-concept, the nascent SSO grew poorly and, more problematically, required growth under controlled conditions and even then was unable to indefinitely store the unnatural information, which is clearly a prerequisite for true semisynthetic life. Here, to fortify and vivify the nascent SSO, we engineered the transporter, used a more chemically optimized UBP, and harnessed the power of the bacterial immune response by using Cas9 to eliminate DNA that had lost the UBP. The optimized SSO grows robustly, constitutively imports the unnatural triphosphates, and is able to indefinitely retain multiple UBPs in virtually any sequence context. This SSO is thus a form of life that can stably store genetic information using a six-letter, three-base-pair alphabet.
TL;DR: An experimental study of epitaxial Te deposited on highly oriented pyrolytic graphite (HOPG) by molecular-beam epitaxy using density functional theory calculations reveals rectangular surface cells with the cell size consistent with the theoretically predicted β-tellurene.
Abstract: Monolayer tellurium (Te) or tellurene has been suggested by a recent theory as a new two-dimensional (2D) system with great electronic and optoelectronic promises. Here we present an experimental study of epitaxial Te deposited on highly oriented pyrolytic graphite (HOPG) by molecular-beam epitaxy. Scanning tunneling microscopy of ultrathin layers of Te reveals rectangular surface cells with the cell size consistent with the theoretically predicted β-tellurene, whereas for thicker films, the cell size is more consistent with that of the [100] surface of the bulk Te crystal. Scanning tunneling spectroscopy measurements show that the films are semiconductors with the energy band gaps decreasing with increasing film thickness, and the gap narrowing occurs predominantly at the valence-band maximum (VBM). The latter is understood by strong coupling of states at the VBM but a weak coupling at conduction band minimum (CBM) as revealed by density functional theory calculations.
TL;DR: The inelastic tunneling probe (itProbe) is used to acquire real-space imaging of intermolecular-bonding structures in the two-dimensional self-assembly of halogenbenzene molecules on a metal surface to provide a hitherto missing understanding of the nature of the halogen bond.
Abstract: Halogens are among the most electronegative elements, and the variations in size and polarizability of halogens require different descriptions of the intermolecular bonds they form. Here we use the inelastic tunneling probe (itProbe) to acquire real-space imaging of intermolecular-bonding structures in the two-dimensional self-assembly of halogenbenzene molecules on a metal surface. Direct visualization is obtained for the intermolecular attraction and the “windmill” pattern of bonding among the fully halogenated molecules. Our results provide a hitherto missing understanding of the nature of the halogen bond.
TL;DR: In this article, the authors predicted that the GeSe/SnS heterobilayer has a direct band structure with a gap value of about 1.519 eV and typical type-II band alignment.
Abstract: Van der Waals (vdW) heterobilayers are emerging as unique structures for next-generation electronic and optoelectronic devices. In this work, we predict that the GeSe/SnS heterobilayer has a direct band structure with a gap value of about 1.519 eV and typical type-II band alignment. Moreover, it possesses the characteristics of superior optical absorption (∼105) and a broad absorption spectrum from the visible light to the near ultraviolet region. In addition, the GeSe/SnS heterobilayer also exhibits obviously anisotropic electronic transport and optical properties with larger current and stronger optical absorption along the zigzag direction. Meanwhile, interlayer coupling and applying an external electric field are identified to be effective methods to modify its electronic and optical properties. Thus, these predicted results indicate that the GeSe/SnS heterobilayer will have promising applications in photovoltaic devices.
TL;DR: In this article, the authors measured the cross sections of e(+)e(-) -> pi(+) pi(-) hc at center-of-mass energies from 3.896 to 4.600 GeVare measured using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider.
Abstract: The cross sections of e(+)e(-) -> pi(+) pi(-) hc at center-of-mass energies from 3.896 to 4.600 GeVare measured using data samples collected with the BESIII detector operating at the Beijing Electron Positron Collider. The cross sections are found to be of the same order of magnitude as those of e(+)e(-) -> pi(+) pi(-) J/psi and e(+)e(-) -> pi(+) pi(-) psi (2S), but the line shape is inconsistent with the Y states observed in the latter two modes. Two structures are observed in the e(+)e(-) -> pi(+) pi(-) hc cross sections around 4.22 and 4.39 GeV/c(2), which we call Y(4220)and Y(4390), respectively. A fit with a coherent sum of two Breit-Wigner functions results in a mass of (4218.4(- 4.5)(vertical bar 5.5) +/- 0.9) MeV/ c(2) and a width of (66.0(- 8.3)(vertical bar 12.3) +/- 0.4) MeV for the Y(4220), and a mass of (4391.5(- 6.8)(+6.3) +/- 1.0) MeV/c(2) and a width of (139.5(- 20.6)(+16.2) +/- 0.6) MeV for the Y(4390), where the first uncertainties are statistical and the second ones systematic. The statistical significance of Y(4220) and Y(4390) is 10 sigma over one structure assumption.
TL;DR: Through a combination of quantum-chemical calculations and spectroscopic investigations, it is suggested that cooperative interactions between CO2 and multiple active sites in the preorganized anion are the driving force for the superior CO2 capacity and excellent reversibility.
Abstract: A novel strategy based on the concept of preorganization and cooperation has been designed for a superior capacity to capture low-concentration CO2 by imide-based ionic liquids. By using this strategy, for the first time, an extremely high gravimetric CO2 capacity of up to 22 wt % (1.65 mol mol−1) and excellent reversibility (16 cycles) have been achieved from 10 vol. % of CO2 in N2 when using an ionic liquid having a preorganized anion. Through a combination of quantum-chemical calculations and spectroscopic investigations, it is suggested that cooperative interactions between CO2 and multiple active sites in the preorganized anion are the driving force for the superior CO2 capacity and excellent reversibility.
TL;DR: Wei et al. as discussed by the authors used interconnected carbon nanoring electrochemical capacitors with high performance in both strongly acidic and alkaline electrolytes for both strongly and moderately acid and neutral electrolytes.
Abstract: Correction for ‘Biomass-derived interconnected carbon nanoring electrochemical capacitors with high performance in both strongly acidic and alkaline electrolytes’ by Xianjun Wei et al., J. Mater. Chem. A, 2017, 5, 181–188.
TL;DR: In this article, the toxic gaseous SO2 adsorption on O-terminated M2CO2 (M = Sc, Hf, Zr, and Ti) monolayers has been studied by means of first-principle calculations.
Abstract: Toxic gaseous SO2 adsorption on O-terminated M2CO2 (M = Sc, Hf, Zr, and Ti) monolayers has been studied by means of first-principle calculations. It is demonstrated that monolayer Sc2CO2 is most preferred for the SO2 molecule with suitable adsorption strength and apparent charge transfer. Moreover, the electronic conductivity of Sc2CO2 displays a sharp increase after the adsorption of SO2. In particular, the adsorption strength of SO2 on Sc2CO2 can be further enhanced or weakened by applying tensile strains or controlling external electronic fields, which is greatly desirable to realize the capture or reversible release of toxic SO2 gas. These distinctive features endow the Sc2CO2 monolayer with high selectivity and sensitivity as a potential candidate for SO2 gas sensor, as well as efficient control for gaseous SO2 capture.
TL;DR: To the authors' knowledge, this is the first example in which the NH unit of indole is used as a directing group for an intramolecular C(sp2)-H bond functionalization to give benzo[a]carbazole derivatives.
TL;DR: A new fundamental strategy for bio-converting Kraft lignin (KL) into useful products was presented, and Cupriavidus basilensis B-8 was able to use KL as the sole carbon source.
TL;DR: Inspired by the unique properties of CNNSs and their advantages in biological applications, it is expected that more attention will be drawn to this promising 2D material and extensive applications can be found in bioanalysis and diseases diagnosis.
TL;DR: In this article, a Stonehenge-like structure was formed by the interaction of CH3NH3PbIxCl3−x and PCDTBT, developing more ordered orientation crystallization and a high quality film morphology.
Abstract: Photovoltaic performance of planar perovskite hybrid solar cells (pero-HSCs) has been improved by mixing CH3NH3PbIxCl3−x and an electron donor polymer [N-9′′-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiaz-ole)] (PCDTBT). PCDTBT contains lone pairs of electrons due to the presence of S and N atoms, which could passivate the trap states of the perovskite layer and thus reduce the number of film defects. A Stonehenge-like structure could be formed by the interaction of CH3NH3PbIxCl3−x and PCDTBT, developing more ordered orientation crystallization and a high quality film morphology. The doped solar cells are characterized by their excellent photovoltaic properties and enhanced stability. When the doping concentration is 0.3 mg mL−1, the fabricated solar cell device exhibits an outstanding power conversion efficiency (PCE) of 15.76%, which represents a significant improvement with respect to the magnitude of 16% obtained for the reference device.
TL;DR: In this article, the authors studied the process e(+)e(-) -> p(+)p(-)psi(3686) using 5.1 fb(-1) of data collected at 16 center-of-mass energy (root s) points from 4.008 to 4.600 GeV by the BESIII detector operating at the BEPCII collider.
Abstract: We study the process e(+)e(-) -> p(+)p(-)psi(3686) using 5.1 fb(-1) of data collected at 16 center-of-mass energy (root s) points from 4.008 to 4.600 GeV by the BESIII detector operating at the BEPCII collider. The measured Born cross sections for e(+)e(-) -> p(+)p(-)psi(3686) are consistent with previous results, but with much improved precision. A fit to the cross section shows contributions from two structures: the first has M = 4209.5 +/- 7.4 +/- 1.4 MeV/c(2) and Gamma = 80.1 +/- 24.6 +/- 2.9 MeV, and the second has M = 4383.8 +/- 4.2 +/- 0.8 MeV/c(2) and Gamma = 84.2 +/- 12.5 +/- 2.1 MeV, where the first errors are statistical and the second systematic. The lower-mass resonance is observed in the process e(+)e(-) -> p(+)p(-)psi(3686) for the first time with a statistical significance of 5.8 sigma. A charged charmoniumlike structure is observed in the pi(+/-)psi(3686) invariant mass spectrum for data at root s = 4.416 GeV. A fit with an S-wave Breit-Wigner function yields a mass M = 4032.1 +/- 2.4 MeV/c(2), where the errors are statistical only. However, there are still unresolved discrepancies between the fit model and data. The width of the intermediate state varies in a wide range for different kinematic regions within the data set. Therefore, no simple interpretation of the data has been found, and a future data sample with larger statistics and more theoretical input will be required to better understand this issue.
TL;DR: The novel three-component BiVO4/Bi 2S3/MoS2 heterojunction was successfully fabricated through a facile in-situ hydrothermal method based on the formation of the intermediate Bi2S3 by coupling BiVO 4 and MoS2 precursor.
TL;DR: In this article, a facile and effective method to fabricate 3D porous structured carbon with N and S co-doping was proposed, which exhibits a high reversible capacity of 260 mAh−hg−1 after 1000 charge/discharge cycles at a current density of 0.5 mA−g −1.
TL;DR: With the aid of TiO 2 and Ag/TiO 2 composites with ultra-high specific surface areas (about 400m 2 ǫg −1 ), this paper demonstrated a facile controlled strategy to adjust the photooxidation activity of Ag/ TiO2 in the photocatalysis degradation process of Rhodamine B (RhB) and showed that the selective oxidation of RhB could be performed through changing irradiation light.
TL;DR: In this article, the sensing performances of Fe embedded graphene sheets (including monolayer Fe-MG and bilayer FeBG) toward toxic gases (NO, CO, HCN and SO2) are comparably investigated.
Abstract: Based on the first-principles calculations, the sensing performances of Fe embedded graphene sheets (including monolayer Fe-MG and bilayer Fe-BG) toward toxic gases (NO, CO, HCN and SO2) are comparably investigated. Compared with the Fe-MG, the stable configuration of Fe-BG sheet exhibits the stronger affinity toward the gas molecules. The adsorbed NO has the largest energy difference between Fe-MG and Fe-BG substrate as compared with the other gases, as well as inducing the change in electronic structure and magnetic property of Fe-graphene systems. In addition, the supported Pt(111) substrate can effectively regulate the strength of interaction between gas molecule and Fe-graphene substrates. As a result, the increased layer of graphene substrate can be utilizing as good sensor for toxic gas molecules, yet the metal Pt supported substrate can enhance the magnetic property of adsorbed gas on the Fe-graphene systems. These results could provide important information for controlling the adsorption sensoring of gas molecules, which opens up a new avenue for the design and fabrication of the graphene-based gas sensors or spintronic devices.