CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Rui Wang,Jing Li,Ying Zhang,Pengyu Li,Jidong Duan,Manqin Tang,Chun Yuan
Li–S battery is considered as one of the most competitive energy storage devices mainly due to the high theoretical specific capacity and high specific energy. However, when facing with the practical application, some issues, especially poor electro-conductivity of element sulfur and severe polysulfides (LiPSs) migration, are still needed to solve to further improve the performance of the Li–S batteries. Aiming at the above two disadvantages, in this work, multifunctional separators are designed as efficient LiPSs absorber via coating vapor grown carbon fiber/MoS 2 (VGCF/MoS 2 ) composites on the polypropylene separator (PP) near the cathode side. For the as-prepared VGCF/MoS 2 coated polypropylene separator (VM/PP), MoS 2 could provide strong chemical adsorption for the LiPSs, while the VGCF framework could act as an electronic transmission channel for the conversion of LiPSs, and also provide physical adsorption for LiPSs at the same time. Benefit from these characteristics, the batteries with VM/PP exhibits a high initial capacity of 1208.7 mAh g −1 at 0.2C and maintains at 862.4 mAh g −1 after 200 cycles. Impressively, the VM/PP shows the high specific capacity of 904.3 mAh g −1 and long-lasting cycling stability with 0.03% capacity attenuation per cycle over 600 cycles at 1.0C, demonstrating excellent electrochemical performance.
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高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 18
·2100971
·
IF 6.147
Saqib Nawaz Khan,Sijie Ge,Ening Gu,Santhosh Kumar Karunakaran,Wentao Yang,Ruijiang Hong,Yaohua Mai,Xianzhong Lin,Guowei Yang
The use of transparent conducting oxides (TCO) as a back contact for Cu 2 ZnSn(S,Se) 4 (CZTSSe) thin film solar cell enables light absorption from both front and rear sides and allows for the fabrication of semi-transparent photovoltaic devices. However, the CZTSSe solar cell based on TCO substrate suffers from high parasitic losses owing to the long post-annealing time at elevated temperature required for high-quality absorber. This work aims to overcome this issue by carefully tailoring the annealing conditions to obtain high-performance solar cell. Rapid thermal processing is used to instantaneously generate high Se vapor pressure at target temperature and shorten the annealing time. The crystalline quality, morphology, and particularly the photovoltaic performance of the resulting CZTSSe thin film are systematically investigated. It is found that the increase of annealing temperature and time improves the crystalline quality but unfortunately deteriorates the device performance owing to increasing parasitic losses. Increasing the amount of Se allows to get highly crystalline absorber within 7 min of annealing, yielding a total area 5.56% efficient CZTSSe solar cell with front illumination resulting from reducing parasitic losses. This work provides a simple approach to preserve the back contact without using a complex interfacial layer.
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高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 45
·16795-16802
·
IF 4.39
Su-Yun Zhang,Fangchao Long,Chenxu Kang,Zhengyuan Jin,Ailun Zhao,Huawei Liang,Shuangchen Ruan,Yu-Jia Zeng
γ-phase copper(I) iodide (abbreviated to CuI hereafter) with different morphologies is realized through a one-step redox process from I-containing ionic liquid (IL) or poly(ionic liquid)s (PILs) precursors at room temperature. The phase composition, morphology, and electronic states of the synthesized CuI samples are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). The resulting CuI products exhibit three different types of morphologies, namely nanocrystals, with an average size of 0.8 ± 0.2 μm, nanoplates, with a thickness of 35.8 ± 0.9 nm, and nanoflowers, with petals with a thickness of 12.2 ± 0.8 nm. Moreover, the as-synthesized CuI samples exhibit gradually diminishing bandgaps and improved photocatalysis performance for the photodegradation of rhodamine B (RhB) under visible light irradiation as the thickness decreases. XPS measurements confirm that IL/PILs coupled to the CuI surface, resulting in a further charge transfer between Cu and I. These results conclusively prove that IL/PILs serve as both the reducing agents and assemble as orientation templates in the formation of the CuI nanostructures, and also successfully mediate the functional properties of the samples by changing the surface electronic structures.
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PubMed
高影响因子
POLYMER JOURNAL
·
2021
·Vol. 54
·期 1
·47-55
·
IF 3.08
Jiao Danhua,Cai Xiaodong,Song Qun,Zhou Ruiqun,Peng Xiao,Bao Dongmei
A series of aliphatic poly(carbonate-co-ester)s (PBCFs) were successfully synthesized via melt polycondensation of 1,4-butanediol (BD) and dimethyl carbonate (DMC) in the presence of biobased fumaric acid (FA). The prepared unsaturated copolymers had weight-average molecular weights ( M w ) in the 4.98 × 10 4 to 8.82 × 10 4 g·mol −1 range and from 1.56 to 1.83 polydispersities. They all had random microstructures. The physical properties of the novel poly(carbonate-co-ester)s, such as melting temperature ( T m ) and melting enthalpy ( ∆H m ), varied widely depending on their composition. The stiff fumaric acid units in the poly(butylene carbonate) (PBC) chain caused an increase in the glass transition temperature ( T g ) and thermal stability. Furthermore, PBCF10 to PBCF20 (with fumaric acid unit content of <19%) contained PBC crystals, while the lattice structure of PBCF40 to PBCF80 (with fumaric acid unit content greater than 37%) was similar to that of the poly(butylene fumarate) (PBF) type. The mechanical properties and biodegradability of the copolymers were also studied.
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高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 40
·14139-14145
·
IF 7.393
Yuxuan Zhang,Xue Zhao,Jianhang Yuan,Xialei An,Xuefang Sun,Jie Yi,Xi-Ming Song
The research on the photomechanical effects of azobenzene-containing high performance polymer materials has received much attention due to their potential applications in high temperature environments. At present, there are few types of photoinduced deformable polymers based on azobenzene-containing high performance polymers, and their photoinduced deformation rates need to be improved. In this paper, a novel series of azobenzene-containing poly(arylene ether)s with various contents of binaphthalene groups were synthesized. Introducing binaphthalene groups into azobenzene-containing poly(arylene ether)s was a helpful strategy to increase the free volume, which could increase the photoinduced deformation rates of the polymers. Under 442 nm unpolarized laser irradiation, the photoinduced deformation rates increased with the contents of binaphthalene groups of the polymers. Under 442 nm polarized laser irradiation, the cantilevers of the azobenzene-containing poly(arylene ether)s have shown unusual photoinduced deformation behavior. When the polarization direction of the polarized laser was perpendicular to the long axis of the cantilevers of the polymers, the cantilevers bent away from the excitation laser at the beginning, then bent towards the excitation laser and could reach the initial position. The angles of the polymers bent away from the excitation laser increased with the contents of binaphthalene groups of the polymers. The photoinduced deformation behavior of the polymers could be adjusted by adjusting the polarization direction of the polarized laser, the laser power and the thickness of the cantilevers of the polymer. This interesting phenomenon has not been reported in previous research on the photoinduced deformation behavior of azobenzene-containing high performance polymers.
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CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 5
·937-944
·
IF 1.071
Liu Zhenchao,Wang Peng,Hu Wei,Liu Baijun
A series of novel organic-inorganic hybrid proton-conducting electrolyte membranes with silane-crosslinked sulfonated poly(aryl ether ketone)(SC-SPAEK) networks was prepared via a simple procedure that includes solution casting and acid treatment. The organosilicon pendants of the silane-grafted SPAEK, which were expected to serve as coupling and crosslinking agents, were found to play a key role in the homogenous dispersion of inorganic particles and improved the performance of hybrid membranes. The hybrid membranes exhibited enhanced proton conductivity, and SC-SPAEK/TiO 2 -4 showed an extremely high proton conductivity of 0.1472 S/cm at 100 °C. The crosslinked hybrid membranes also demonstrated good chemical resistance, oxidative stability, and mechanical properties. The crosslinked hybrid membranes with excellent comprehensive performance may be a promising material for proton exchange membrane fuel cells.
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SUPERLATTICES AND MICROSTRUCTURES
·
2019
·
IF 2.385
Yong Cui,Junye Tong,Hongmei Shao,Gang Wang,Daocheng Pan
Novel semiconductor Cu 2 BaSn(S,Se) 4 thin film with orthorhombic structure has been successfully fabricated via solution process. XRD、EDS、XPS and SEM were used to investigate the structure、elemental composition、valence states and morphology of the Cu 2 BaSn(S,Se) 4 thin film . Different selenization temperatures that affected CBTSSe thin film quality were investigated. The photoresponse property of Cu 2 BaSn(S,Se) 4 thin film indicated that it had potential application in low-cost thin film solar cells. The solution process to fabricate Cu 2 BaSn(S,Se) 4 /CdS heterojunction thin film solar cells demonstrated that Cu 2 BaSn(S,Se) 4 thin film could be applied as absorb layer in the thin film solar cells.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Juanli Liu,Baiqin Zhou,Hong Zhang,Juan Ma,Bin Mu,Wenbo Zhang
A novel wasted sludge-based Biochar modified by Chitosan and Fe/S (BCFe/S) was prepared for tetracycline (TC) removal from water. To investigate the similarities and differences in adsorption behaviors between Biochar and BCFe/S, characterization, kinetics, isotherms and thermodynamics were discussed. The studies on site energy distribution (SED) were also presented. The results showed that the maximum TC adsorption amount was 51.78 mg/g for Biochar, while it was 183.01 mg/g for BCFe/S-4. Meanwhile, electrostatic attraction, π-π stacking, pore filling, silicate bonding and hydrogen bonding were the main adsorption mechanisms for TC removal by Biochar. Besides above mechanisms, chelating and ion exchange were also accounted for adsorption mechanisms for TC uptake by BCFe/S-4. Moreover, SED results revealed that the surface of Biochar was more homogeneous while the surface of BCFe/S-4 was more heterogeneous at higher temperature. Findings of this work could offer valuable information in designing adsorbents and investigating adsorption mechanisms.
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高影响因子
FUEL
·
2019
·
IF 5.128
Chen Li,Yuefei Song,Xudong Wang,Quan Zhang
Sulfonated titanium dioxide (S-TiO 2 ) was prepared by the grafting of sulfonic groups onto TiO 2 , and doped into the PVDF-g-PSSA as a highly efficient inorganic additive, thus achieving simultaneous improvement of the proton conductivity and anti-fouling property of the synthesized S-TiO 2 /PPSSA proton exchange membrane (PEM). The S-TiO 2 /PPSSA membrane was implemented in microbial fuel cell (MFC) for the first time, and its physicochemical properties and performance in MFC were studied. A new technique of combining Quartz crystal microbalance with dissipation with membrane spin-coated sensors made by a spin coating method was utilized to provide an insight into the anti-fouling property of the prepared membranes. The implementation of Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy demonstrated TiO 2 was successfully introduced into the sulphonic groups. The S-TiO 2 /PPSSA-5.0 membrane has a significant increase in the water uptake (40.9%) and proton conductivity (0.067 S/cm) compared with the PVDF-g-PSSA membrane. QCM-D results indicated that it has better anti-fouling property than pristine membrane and Nafion 117. Moreover, the MFC with the S-TiO 2 /PPSSA-5.0 membrane exhibited a maximum power density of 130.54 mW/m 2 , very close to that of Nafion 117 (132.02 mW/m 2 ), but had the highest COD removal of 91% and least bio-fouling adsorption. These results demonstrate that the blending of sulfonated organic polymers and sulfonated inorganic additives can improve the electrochemical and anti-fouling properties of the composite membranes, which is a new concept for the preparation of PEM suitable for MFC. The S-TiO 2 /PPSSA-5.0 composite PEM is an appropriate candidate separator for the large-scale application of MFCs.
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高影响因子
INORGANIC CHEMISTRY
·
2019
·
IF 4.85
Ailijiang Abudurusuli,Kui Wu,Junjie Li,Alimujiang Yalikun,Zhihua Yang,Shilie Pan
A series of metal chalcogenides, LiBa2MIIIQ4 (MIII = Al, Ga, In; Q = S, Se), have been successfully obtained by the sealed-tube method. LiBa2MIIIQ4 undergoes a special structural transformation from the P21/m (LiBa2AlQ4 and LiBa2GaS4) to the P21/n (LiBa2InQ4) space group, which leads to disparities in electronic states, birefringence, and band gaps. Their structures feature the same zigzag [LiMIIIQ4]4– layers consisting of corner-shared LiQ4 and MIIIQ4 tetrahedra. The Ba atoms serve to bridge the [LiMIIIQ4]4– layers. The structural comparisons show that the radii of MIII and the coordination environments of the Ba atoms (BaQ7 vs BaQ8) cooperatively affect the structural transition from simple mirror m to diagonal glide n in LiBa2MIIIQ4. In addition, a statistical analysis uncovers that the MIII/Ba atomic ratio also plays an important role in regulating the structural transition in Ba- and MIII-based chalcogenides.
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高影响因子
JOURNAL OF ORGANOMETALLIC CHEMISTRY
·
2019
·
IF 2.066
Amin Khan,Haojie Yu,Yang Wang,Li Wang,Raja Summe Ullah,Fazal Haq,Tarig Elshaarani,Muhammad Usman,Ahsan Nazir,Kaleem-ur-Rehman Naveed
Different copolymers (poly(2-(methacryloyloxy) ethyl ferrocene carboxylate- co -methacrylo-4-aminoazobenzene- co -methacrylic acid)s) (P(FHEMA- co -MAZO- co -MAA)s) were synthesized and their different properties were analyzed in this work. Methacrylic acid was introduced as a side group to possibly affect the photostability. The synthesized copolymers were characterized by nuclear magnetic resonance ( 1 H NMR) spectroscopy and gel permeation chromatography (GPC). Thermal studies were performed by thermogravimetric (TG), differential thermogravimetric (DTG) and differential scanning calorimetry (DSC) analysis, which showed that the copolymers were thermally stable under the operating conditions of the information storage devices. Redox studies and photoresponsive studies were performed by CV technique and UV/vis spectroscopy which showed that these copolymers contained good redox and photoresponsive properties. The obtained results paved the way towards the four states information storage of the materials.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Songlin Liu,Hao Ma,Jinyu Zhu,Xiao Xia Han,Bing Zhao
Protein S-nitrosylation is an important post-translational modification, which has important effect on protein functions and is relevant to various diseases. For quantification of the S-nitrosated proteins, it is still challenging to establish a detection method in combination of fast and one-step determination, highly sensitivity and accuracy. Here, we develop a label-free, direct detection method for S-nitrosated proteins based on resonance Raman scattering of ferrous cytochrome c. The laser source of the Raman spectrometer is utilized both for inducing NO leakage and for Raman scattering excitation. The heme ligation alteration and oxidation enable fast quantification of the released NO by the resonance Raman spectroscopy of the cytochrome c. All the results shown in this study demonstrate the great potential of the proposed method for fast, sensitive and reliable assessment of total S-nitrosated proteins in the clinical applications.
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危险品化学品经营许可证（带存储）