DALTON TRANSACTIONS
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2016
·Vol. 45
·期 26
·10681-10688
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IF 4.177
Ni Zhen,Kui Wu,Ying Wang,Qiang Li,Wenhui Gao,Dianwei Hou,Zhihua Yang,Huaidong Jiang,Yongjun Dong,Shilie Pan
Two non-centrosymmetric metal chalcogenides, BaCdSnS4 and Ba3CdSn2S8, were synthesized using a high temperature solid-state reaction in an evacuated silica tube. Although the two compounds have the same building units in their structures, namely CdS4, SnS4 and BaS8 units, both of them have different structures. BaCdSnS4 crystallizes in the orthorhombic space group Fdd2 and its structure can be characterized by the two-dimensional ∞[Cd–Sn–S] layers composed of corner- and edge-sharing CdS4 and SnS4 tetrahedra with Ba atoms located between the two adjacent ∞[Cd–Sn–S] layers. Ba3CdSn2S8 crystallizes in the space group I3d of the orthorhombic system and the CdS4 and SnS4 groups are connected with each other via corner-sharing to form a three-dimensional framework, which is different from the 2D ∞[Cd–Sn–S] layer structure in BaCdSnS4. The UV-vis-NIR diffuse-reflectance spectra show that the experimental band gaps are about 2.30 eV for BaCdSnS4 and 2.75 eV for Ba3CdSn2S8, respectively. IR and Raman measurement results indicate that their transparent ranges are up to 25 μm. Second-order NLO measurements show that BaCdSnS4 exhibits strong powder second-harmonic generation (SHG) intensities at 2.09 μm laser pumping that are ∼5 and 0.7 times that of AgGaS2 in the particle size 38–55 and 150–200 μm, respectively, whereas Ba3CdSn2S8 only exhibits SHG intensities of about 0.8 and 0.1 times that of AgGaS2 at the same particle sizes. The origin of the NLO response in BaCdSnS4 may originate from the macroscopic arrangement of the SnS4 and CdS4 tetrahedra. Furthermore, the photoluminescence properties of the two compounds have also been investigated and show obvious blue and green light emission.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Haomiao Li,Kangli Wang,Shijie Cheng,Kai Jiang
For the first time, Sb–Sn alloys are reported as environmentally friendly positive electrodes for high performance liquid metal batteries (LMBs). Meanwhile, the dominant role of Sb in setting the potential and the inert “solvent” role of Sn in lowering the melting point and decreasing the cell cost are clarified on the basis of electrochemical titration and ex situ analysis. The Li||Sb–Sn LMB exhibits superior rate performance (only 13% capacity loss from 100 mA cm–2 to 1 A cm–2 of current densities), low materials cost (73 $ kW h–1), and high energy density (200.4 W h kg–1) at reduced operating temperature. Most notably, after 3500 h of operation (more than 430 full charge–discharge cycles), a discharge capacity of 20.6 Ah is maintained with a capacity retention of 96.7%, corresponding to a fade rate of 0.0078% per cycle, which potentially meets the metrics of large-scale energy storage without environmental concerns.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
·
IF 2.714
Jian-Rong Li,Lei Xu,Ming-Lai Fu,Huachun Lan
The layered chalcogenide has been shown to efficiently absorb organic pollutant, as well as heavy metals and radioactive ions. Previous studied showed that the regeneration of spent layered chalcogenide was impossible because of the strong affinity between soft metal ions and sulfur ions. While can adsorbent of layered chalcogenide be regenerated for adsorption of organic pollutant? In this study a case study of norfloxacin (NOR) adsorbed by layered chalcogenide in water is illustrated. The typical layered chalcogenide, K 1.9 Mn 0.95 Sn 2.05 S 6 (KMS-1) was hydrothermally synthesized and then used to remove NOR in aqueous solution. The adsorption process was found strongly pH-dependent. The maximum adsorption capacities were obtained at pH of 4 at different temperatures. The shift of Bragg peaks indicated from XRD patterns at different pH accompanying SEM images and adsorption amount showed that cation exchange played an essential role to remove NOR. The intercalation of cationic NOR took titled orientations of di-molecular NOR in KMS-1 with the interlayer space of 1.38 nm and 0.97 nm, respectively. The KMS-1 intercalated with NOR can be successfully regenerated by cation exchange using high concentration (1.0 M) KCl solution, in which the decrease in adsorption capacity was found <10% after three adsorption – desorption cycles. The obtained results suggested layered chalcogenide could be a promising regenerated adsorbent to remove organic pollutant with potential application in the environmental remediation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2017
·
IF 2.714
Yun-Xia Wang,Kiran Gupta,Jian-Rong Li,Baoling Yuan,Jia-Cheng E. Yang,Ming-Lai Fu
A novel easily separated magnetic chalcogenide composite, KMS-1/L-Cystein/Fe 3 O 4 (KCF), was successfully synthesized using bifunctional linker (L-Cystein) to connect KMS-1 and Fe 3 O 4 nanoparticles, and was examined to remove ciprofloxacin (CIP) from aqueous solution. The composite was thoroughly characterized by XRD, SEM, EDX, FTIR and magnetization measurements techniques. The adsorption experiments were carried out and investigated under different conditions, such as contact time and pH of solution. The CIP removal reaction was found to better follow a pseudo-second-order kinetic model than the pseudo-first-order. The Langmuir adsorption isotherm was employed to understand the removal process. The pH of solution is critical for the adsorption of CIP on KCF, and the maximum adsorption (181.32 mg/g) of CIP could be reached under pH 6. In addition, the KCF adsorbent showed magnetization and operational stability, and it could be readily separated from solution by applying an external magnetic field. The high stability, performance, inexpensive, and easily recyclable KCF composite may serve as a promising adsorbent for water treatment.
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RSC Advances
·
2016
·Vol. 6
·期 79
·75186-75193
·
IF 3.289
Jie Yang,Chun Fang,Chunxiong Bao,Weiwei Yang,Tao Yu,Weidong Zhu,Faming Li,Jianguo Liu,Zhigang Zou
A Ni3S2 coated indium tin oxide (ITO) core–shell structure on flexible carbon fabrics (CF@ITO@Ni3S2) was prepared by electrodepositing Ni3S2 nanosheets on ITO nanowire arrays grown on flexible carbon fabrics by chemical vapor deposition. The ITO nanowires on carbon fabrics formed a conductive support which offered a large contact surface with the electrolyte and hence was accessible for ion diffusion. Ni3S2 nanosheets were uniformly deposited on the ITO nanowire. The maximum mass loading of Ni3S2 on ITO nanowire array coated carbon fabrics could reach about a quadruple higher amount than that on the bare carbon fabrics. The prepared CF@ITO@Ni3S2 electrodes exhibited excellent capacitive performance compared with Ni3S2 coated bare carbon fabric electrodes (CF@Ni3S2). High areal capacitance of 3.85 F cm−2 and gravimetric capacitance of 1865 F g−1 were achieved when the mass loadings of Ni3S2 on the ITO nanowire arrays were around 4.12 mg cm−2 and 0.96 mg cm−2, respectively. The sample with 0.96 mg cm−2 of Ni3S2 could also deliver 1372 F g−1 when charge–discharge current density reached 50 mA cm−2, indicating the excellent rate capability of the structure. The assembled all-solid-state full cell based on symmetric electrodes obtained a relatively high areal capacitance of 736 mF cm−2 at 8 mA cm−2, which delivered a maximum energy density of 1.02 mW h cm−3 at a power density of 39.9 W cm−3. The outstanding capacitive performance suggests that the CF@ITO@Ni3S2 device was promising for application in an inexpensive energy storage system.
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Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 34
·13171-13175
·
IF 8.262
Zhiwei Zhou,Junyou Yang,Qinghui Jiang,Yubo Luo,Dan Zhang,Yangyang Ren,Xu He,Jiwu Xin
We studied the effect of doping with Bi on the thermoelectric properties of SnTe-based materials. Doping with Bi reduced the density of holes and increased the Seebeck coefficient over a wide temperature range as a result of modulation of the carrier concentration and an increase in the density of states effective mass. The lattice thermal conductivity was also greatly reduced as a result of the wide frequency range of phonon scattering by multiscale architectures derived from Bi doping. A maximum ZT value of c. 1.1 at 873 K was obtained in Sn0.94Bi0.06Te, an enhancement of 165% compared with the undoped sample.
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RSC Advances
·
2016
·Vol. 6
·期 107
·105723-105728
·
IF 3.289
Cheng Chen,Yan Li,Lijian Liu
Oligomers as fluorescent macromolecules are of significant importance and are fairly attractive for high quantum yield two-way conversion luminescence. We report a high conversion rate (ΦF = 0.5184) for a fluorescent oligomer, 1,4-butanediol-bis(5-carbonyl-3-carbethoxy-2-pyrazoline). It was prepared by the novel cyclopolycondensation of 1,4-butanediol-bis(5-carbonyl-3-carbethoxy-2-pyrazoline), a chromophore with good fluorescence (ΦF = 0.0573). After polymerization, a green fluorescent protein (GFP)-mimetic structure was formed, in which a methylene chain (–CH2–CH2–CH2–CH2–) as a flexible group is beneficial due to its folding, and an azo group sits in the rigid pyrazoline ring because of a resonance effect. These factors collectively contribute to the excellent efficiency of the fluorescence performance of the oligomer. Additionally, the oligomer exhibited a weak red shift and a significant fluorescence enhancement compared with the monomer, and we achieved good quality live-cell imaging. The oligomer also allowed for the enhancement of fluorescence intensity through the two-wavelength excitation of a cell rather than increasing the dosage of the dye or the power of the laser.
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MOLECULAR DIVERSITY
·
2024
·
IF 3.9
Xie Tianyu,Hu Wenbo,You Lin,Wang Xin
With cabozantinib as the precursor, a novel small molecule inhibitors of c-Met kinase with thieno [2,3- b ] pyridine as the scaffold were designed, synthesized and evaluated for their biological activity against A549, Hela and MCF-7 cell lines. The in vitro activities of 16 compounds were tested by MTT method with cabozantinib as control drug. Most compounds had moderate to strong inhibitory activities on cells. Among them, compound 10 had the strongest inhibitory activity, which was superior to the lead compound cabozantinib. Its IC 50 values for A549, Hela and MCF-7 cells were 0.005, 2.833 and 13.581 μM, respectively. The colony formation assay demonstrated that compound 10 significantly inhibited the colony formation of A549 cells and suppressed their growth in a concentration-dependent manner. The wound healing assay showed that compound 10 could effectively inhibit the migration of cancer cells compared to a blank control group. The AO/EB assay demonstrated that compound 10 possesses the capability to effectively trigger apoptosis in a concentration-dependent manner. The elementary structure–activity relationship, molecular docking and pharmacokinetics studies revealed the significance of thieno [2,3- b ] pyridine derivatives in anti-tumor activity. Graphical abstract
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SOLID STATE SCIENCES
·
2025
·
IF 3.3
Zhiwei Jiao,Aolong Sun,Xufang Zhang,Mulan Mu,Haoran Dong
Black phosphorus (BP) has attracted much attention for its excellent electrical and optical properties and its potential in field-effect transistors (FETs). In this work, BP doped with oxygen group elements (sulfur, selenium, and tellurium) was successfully synthesized using the chemical vapor transport method (CVT), and their optoelectronic properties were studied systematically. It is confirmed by X-ray diffraction (XRD) that BP crystals doped with the oxygen group elements exhibited high crystalline quality and yield. Changes in the absorption spectra and surface morphology indicated that doped BP demonstrated significantly enhanced environmental stability compared to undoped BP under prolonged air exposure. Among the doped samples, tellurium (Te)-doped BP showed the highest stability, with a degradation rate of only 9.91 % after 10 days. FETs based on doped BP were successfully fabricated, and their electrical performances were thoroughly evaluated. We found that the hole mobility of BP was dramatically improved by doping, and the selenium (Se)-doped BP possessed the highest hole mobility of 1684.24 cm 2 /V·s.
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Zhuoming Xu,Mohammad Nisar,Junze Zhang,Fu Li,Shuo Chen,Guangxing Liang,Jingting Luo,Zhuanghao Zheng,Yue-Xing Chen
SnSe, known for its low thermal conductivity and eco-friendly nature, is a potential medium-temperature thermoelectric (TE) material. However, its low carrier concentration has hindered achieving a high ZT value in n-type SnSe. This study reports the successful preparation of n-type polycrystalline SnSe 0.95-x (CuI) x samples via mechanical alloying and spark plasma sintering, which significantly increased carrier concentration and introduced point defects, enhancing phonon scattering and reducing lattice thermal conductivity. Density functional theory (DFT) calculations reveals that CuI doping altered the bandgap and band degeneracy, enhancing the density-of-states effective mass and benefiting the Seebeck coefficient. The ZT value for the x = 0.03 sample reached a peak of 0.74 at 773 K, marking a significant improvement over the undoped sample. This study presents an effective approach to optimize TE properties through CuI doping, offering a stable and effective method to enhance the thermoelectric performance of n-type polycrystalline SnSe.
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ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Xiaoquan Han,Tianqi Li,Jianxun Zhao,Shang Gao,Jing Zhao,Wanqiang Liu
Despite the recent resurgence of rechargeable aqueous zinc batteries (RAZBs), challenges persist for Zn metal anodes, including dendrite growth and corrosion in mild aqueous electrolytes during cycling. Developing a simple and effective solution is crucial. This study introduces a one-step strategy to create a protective layer at room temperature comprising the superconductor Nb3Sn and embedded Zn foil. The Nb3Sn–Zn composite, with a high Zn2+ transfer number and uniform nucleation sites, exhibits excellent zinc affinity and synergistic effects. This composite effectively inhibits dendrite growth by controlling Zn nucleation and prevents Zn corrosion and hydrogen evolution by shielding the Zn metal surface from electrolyte attack. The Nb3Sn–Zn composite shows remarkable electrochemical properties, including a low voltage hysteresis, high Coulombic efficiency, and prolonged cycling stability. Furthermore, a full cell utilizing the Nb3Sn–Zn anode and MnO2 cathode demonstrates superior rate capability and cycle life stability. The present research introduces an innovative methodology for the design of dendrite-free Zn anodes suitable for practical applications.
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CATALYSIS TODAY
·
2017
·
IF 4.636
Tao Lei,Xia Zhang,Joey Jung,Yixiao Cai,Xiaofan Hou,Qi Zhang,Jinli Qiao
Using electrochemical reduction to convert CO 2 into useful small molecule fuels represents a value-added approach to the simultaneous generation of alternative fuels and environmental remediation of carbon emissions from the continued use of conventional fuels. Here, we report a novel flow cell design for CO 2 electroreduction. The alkaline ion-exchange membranes are used to separate anolyte from aqueous catholyte, and the commercial Sn particles are deposited over a carbon support, which serves as the cathode. Various influence factors on the electrochemical reduction of gaseous CO 2 into fuel are investigated, including a selection of different alkaline-exchange membranes, time duration of the electrolysis, current density and flow rate of electrolyte on the produced formate as a target fuel. Three alkaline membranes (A901, FAD and Yichen) and an acidic membrane (Naffion 117) are used. The maximum Faradaic Efficiencies (FE) of formate formation are 82.8% (Yichen), 79.2% (A901) and 90.1% (FAD), which are comparable to and even higher than that of Nafion 117 membrane (89.2%). In particular, the FAD alkaline membrane showed an applicable prospect with cell voltage of 2.85 V, lower than when using Nafion 117 membrane. We also successfully achieve the formate production rate over 1.47 mmol m −2 s −1 at a working current density of 50 mA cm −2 over 60 min continuous’ operation, allowing the formate concentration up to 1.9 g L −1 . These encouraging results reveal that different ion-exchange membranes have obvious impact on the electrochemical reduction of carbon dioxide (ERC).
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