ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
FuYin Lan,HaiYan Zhang,Jinchen Fan,Qunjie Xu,Hexing Li,YuLin Min
Herein, we introduce polymer nanofibers of TiO2@NiCo-LDH as interlayers into Li–S batteries. From 0 to 60 °C, the interlayers can deliver high sulfur utilization, an outstanding rate capability, and excellent cycling life. High-temperature excitation makes it easier for the valence band electrons of TiO2 to transition to the conduction band. The electron–hole pairs formed on the surface combine with the ether group of 1,3-dioxolane in the electrolyte, which greatly reduces the decomposition and volatilization rates of the electrolyte, ensuring Li–S batteries with good cycle performance at high temperatures. The capacity can stabilize at 798.6 mAh g–1 after 100 cycles at 60 °C and 1C, and the battery can provide a capacity higher than 323.2 mAh g–1 at 0 °C. Simultaneously, the lithium metal symmetrical battery with a functional separator can be continuously cycled for 1800 and 750 h without a short circuit at the current densities of 0.65 and 1.63 mA cm–2, respectively.
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Yan Jia,Peng Li,Wei Song,Guangjiu Zhao,Daoyuan Zheng,Dongmei Li,Yanni Wang,Jiayue Wang,Chunyan Li,Keli Han
S-Adenosylhomocysteine hydrolase (SAHase) is a cellular enzyme that plays a key role in the methylation process, and a potential drug target in the discovery of antiviral and anticancer agents. There is increasing interest in determining its activity in the biological and clinical fields with chemosensors but with limited success so far. Herein, we designed and developed for the first time an off/on-type of fluorogenic substrate (NADE) that is directly responsive to SAHase activity. NADE used 1,8-naphthalimide as the signal reporter and adenosine (Ade) as the reaction center; removal of the Ade moiety enhanced the fluorescence by >10-fold. Kinetic study showed that NADE followed a non-Michaelis–Menten pattern that corresponded to the allosteric behavior of SAHase. NADE showed excellent selectivity and functioned efficiently in cells, allowing the microscopic imaging of SAHase activity. NADE can also be used to identify and measure the effectiveness of inhibitors in a markedly superior way. In a word, NADE would be broadly useful in clinical applications and academic studies.
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2020
·Vol. 39
·期 1
·51-59
·
IF 3.154
Song Bo,Qin An-Jun,Tang Ben Zhong
Green monomers, such as carbon dioxide (CO 2 ), are closely related to our daily life and highly desirable to be transferred to functional polymers with diverse structures and versatile properties because they are abundant, cheap, nontoxic, renewable, and sustainable. However, the polymerizations based on these green monomers are to be further developed. In this work, a facile CO 2 and alkyne-based one-pot, two-step, four-component tandem polymerization was successfully established. The polymerization of CO 2 , diynes, alkyl dihalides, and primary/secondary amines can proceed under mild reaction conditions and regio- and stereoregular poly(aminoacrylate)s with good solubility and thermal stability were obtained in high yields (up to 95%). Notably, distinctly different stereoregularity of resultant poly(aminoacrylate)s was realized via using primary or secondary amines. Using the former would readily generate polymers with 100% Z -isomers, whereas the latter furnished products with over 95% E -isomers. Through different monomer combination, the polymers with tunable structures and properties were obtained. Moreover, the tetraphenylethene units containing poly(aminoacrylate)s, showing the unique aggregation-induced emission characteristics, could function as a fluorescent probe for sensitive explosive detection. Thus, this work not only develops a facile CO 2 and alkyne-based multicomponent tandem polymerization but also provides a valuable strategy to fine-tune the polymer structures and properties, which could be potentially applied in diverse areas.
✓ 已验证
DOI
高影响因子
MACROMOLECULES
·
2019
·
IF 5.997
Bingjie Zhao,Kun Wei,Lei Wang,Sixun Zheng
3,13-Di(cyclic carbonate) double decker silsesquioxane, a new difunctional polyhedral oligomeric silsesquioxane (POSS), was successfully synthesized. By using this POSS macromer, the organic–inorganic poly(hydroxyl urethanes) (PHUs) were synthesized with POSS cages in the main chains. Compared to the neat PHU, the organic–inorganic PHUs displayed improved thermomechanical properties. The organic–inorganic PHUs were microphase-separated, and the main-chain POSS cages were self-assembled into the nanodomains in the size of 10–30 nm. It was found that the POSS nanodomains acted as the nano-cross-linking points of physically cross-linked networks. Although the linear organic–inorganic PHUs were soluble in common organic solvents, they were capable of displaying the thermomechanical properties similar to cross-linked PHU elastomers. Owing to the physical cross-linking, the organic–inorganic PHUs were endowed with shape memory properties. In the meantime, the organic–inorganic PHUs can be reprocessed at elevated temperature; the tensile mechanical strength can be recovered up to 90%. The reprocessing properties resulted from the transcarbamoylation reaction of hydroxyurethane structural units other than the disintegration of POSS nanodomains at elevated temperature. The reprocessing properties can be utilized to program the original shapes of shape memory polymers.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 5
·050548
·
IF 4.316
Chengjun Zhang,Sha Chen,Guangying Zhou,Qiong Hou,Suilian Luo,Yuhai Wang,Guang Shi
Two poly(arylamine-imide)s, poly(N,N,N',N'-tetraphenyl-1,4-benzenediamine naphthalenediimide) (PDDP-NI) and poly(N,N,N',N'-tetraphenyl-1,4-benzenediamine perylenediimide) (PDDP-PI), were successfully prepared by condensation polymerization of an amine monomer N,N,N',N'-tetraphenyl-1,4-benzenediamine (DDP) with dianhydride monomer 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) or 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA). The DDP units in the polymer can reversibly dope/dedope the PF6− anion, while the naphthalenediimide (NI) unit or perylene diimide (PI) unit can reversibly insert/extract the lithium cation. The lithium ion half-cells based on the polymer cathode and the lithium anode are assembled and the electrochemical properties are tested. Due to the high voltage of the DDP unit in the polymer backbone, lithium-ion half-cells based on PDDP-NI and PDDP-PI cathodes provide a high average discharge voltage of about 3.2 V. Moreover, the as-prepared polymer materials exhibit long-cycle performance, PDDP-NI remains 89% capacity after 500 cycles at 10 C and PDDP-PI maintains 98% capacity after 1000 cycles at 10 C, furthermore, their coulombic efficiency close to 100% at all current rates tested, which shows that these organic cathode materials have potential applications in long-cycle lithium-ion batteries.
✓ 已验证
DOI
高影响因子
JOURNAL OF BIOMATERIALS APPLICATIONS
·
2024
·
IF 2.3
Yang Sheng,Danni Qing,Naijun Li,Peng Zhang,Yixin Sun,Rong Zhang
Zn-Ag-In-S (ZAIS) quantum dots (QDs) were synthesized with various Ag-to-In ratios and used as novel photosensitizers for photodynamic therapy (PDT) on cancer cell inhibition and bacterial sterilization, and their structural, optical, and photodynamic properties were investigated. The alloyed QDs displayed a photoluminescence quantum yield of 72% with a long fluorescence lifetime of 5.3 μs when the Ag-to-In ratio was 1:3, suggesting a good opportunity as a dual functional platform for fluorescence imaging and PDT. The ZAIS QDs were then coated with amphiphilic brush copolymer poly(maleic anhydride-alt-1-octadecene) (PMAO) before application. The 1O2 quantum yield of the ZAIS/PMAO was measured to be 8%, which was higher than previously reported CdSe QDs and comparable to some organic photosensitizers. Moreover, the ZAIS QDs showed excellent stability in aqueous and biological media, unlike organic photosensitizers that tend to degrade over time. The in vitro PDT against human melanoma cell line (A2058) and Staphylococcus aureus shows about 30% inhibition rate upon 20 min light irradiation. Cell staining images clearly demonstrated that co-treatment with ZAIS QDs and light irradiation effectively killed A2058 cells, demonstrating the potential of ZAIS QDs as novel and versatile photosensitizers for PDT in cancer and bacterial treatment, and provides useful information for future designing of QD-based photosensitizers.
✓ 已验证
DOI
PubMed
高影响因子
Advanced Powder Materials
·
2021
·
IF 0
Mengqin Gao,Wan-Ying Zhou,Yu-Xue Mo,Tian Sheng,Yanhong Deng,Liezun Chen,Kai Wang,Yanliang Tan,Haiqing Zhou
Here we proposed a novel approach to greatly enhance the electrochemical performance of Li–S batteries by designing a composite electrode material composed of a core-shell structure of S@Pt composite (sulfur content, 85%) grown on the S surface. The platinum (Pt) nanosheets provide physical barrier and strong chemical binding to anchor LiPSs and improve the electronic conductivity of S. Significantly, by introducing carbon nanofibers (CNFs) as the interlayer, we achieved outstanding Li–S battery with a high initial discharge capacity of 1040 mAh g −1 at 1.0 C and a reversible capacity of 742 mAh g −1 after 350 cycles, demonstrating its excellent long-term cycling stability with a low capacity decay rate of 0.08% per cycle. According to the density functional theory (DFT) calculations, we proposed that the superior performance is attributed to the cooperative effects of the strong interfacial interaction between Pt (111) surface and the S 8 molecule, and very low reaction energy of decomposition, −6.4 eV.
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhenyuan Ji,Guanxiang Tang,Lizhi Chen,Jiali Zhong,Yao Chen,Guoxing Zhu,Xinghang Chuan,Jingchuang Zhang,Xiaoping Shen
Defect engineering, such as introducing heteroatoms and vacancies into the electrode materials, provides a feasible strategy for boosting the electrochemical characteristics of hybrid supercapacitors. In this work, hollow N, S co-doped carbon (HNSC) spheres with high specific surface area are fabricated through the carbonization-etching process. Thanks to the unique porous architecture and multiple heteroatoms doping, the obtained HNSC electrode achieves an excellent capacitance of 330.4 F g −1 at 1 A g −1 and superior capacitance retention of 97 % after 10,000 cycles in 6 M KOH. Subsequently, the Co 3 S 4 nanoparticles with controllable sulfur vacancies (Vs-Co 3 S 4 ) are homogeneously deposited on the HNSC skeleton by a facile chemical reduction strategy. The fabricated Vs-Co 3 S 4 /HNSC cathode exhibits a compelling electrochemical capacity of 497.2 C g −1 at 1 A g −1 and a prominent cycle life of 98.1 % after 10,000 cycles in 6 M KOH. Noticeably, benefiting from the defects regulation and unique structures of HNSC and Vs-Co 3 S 4 /HNSC, the constructed hybrid supercapacitor of V S -Co 3 S 4 /HNSC//HNSC reaches a marvelous energy density of 71.4 Wh kg −1 at 925.3 W kg −1 with only 8.1 % capacity loss within 15,000 cycles at 10 A g −1 . Such eminent electrochemical features inspire the rational design of advanced defect-modulated electrode materials for energy storage applications.
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 10
·2562
·
IF 5.076
Shuang Lian,Yu Wang,Haifeng Ji,Xiaojie Zhang,Jingjing Shi,Yi Feng,Xiongwei Qu
The development of solid-state polymer electrolytes is an effective way to overcome the notorious shuttle effect of polysulfides in traditional liquid lithium sulfur batteries. In this paper, cationic cyclopropenium based cross-linked polymer was firstly prepared with the one pot method, and then the counter ion was replaced by TFSI−anion using simple ion replacement. Cationic cyclopropenium hyper-crosslinked polymer (HP) was introduced into a polyethylene oxide (PEO) matrix with the solution casting method to prepare a composite polymer electrolyte membrane. By adding HP@TFSI to the PEO-based electrolyte, the mechanical and electrochemical properties of the solid-state lithium-sulfur batteries were significantly improved. The PEO-20%HP@TFSI electrolyte shows the highest Li+ionic conductivity at 60 °C (4.0 × 10−4S·cm−1) and the highest mechanical strength. In the PEO matrix, uniform distribution of HP@TFSI inhibits crystallization and weakens the interaction between each PEO chain. Compared with pure PEO/LiTFSI electrolyte, the PEO-20%HP@TFSI electrolyte shows lower interface resistance and higher interface stability with lithium anode. The lithium sulfur battery based on the PEO-20%HP@TFSI electrolyte shows excellent electrochemical performance, high Coulombic efficiency and high cycle stability. After 500 cycles, the capacity of the lithium-sulfur battery based on PEO-20%HP@TFSI electrolytes keeps approximately 410 mAh·g−1at 1 C, the Coulomb efficiency is close to 100%, and the cycle capacity decay rate is 0.082%.
✓ 已验证
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 5
·1120-1131
·
IF 3.85
Yan Wenjing,Zhang Jintao,Lü Aijing,Lu Songle,Zhong Yiwei,Wang Mingyong
Stable non-noble metal bifunctional electrocatalysts are one of the challenges to the fluctuating overall water splitting driven by renewable energy. Herein, a novel self-supporting hierarchically porous Ni x Fe—S/NiFe 2 O 4 heterostructure as bifunctional electrocatalyst was constructed based on porous Ni—Fe electrodeposition on three-dimensional (3D) carbon fiber cloth, in situ oxidation, and chemical sulfuration. Results showed that the Ni x Fe—S/NiFe 2 O 4 heterostructure with a large specific surface area exhibits good bifunctional activity and stability for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) because of the abundance of active sites, synergistic effect of the heterostructure, superhydrophilic surface, and stable, self-supporting structure. The results further confirmed that the Ni x Fe—S phase in the heterostructure is transformed into metal oxides/hydroxides and Ni 3 S 2 during OER. Compared with the commercial 20wt% Pt/C∥IrO 2 —Ta 2 O 5 electrolyzer, the self-supporting Ni 1/5 Fe—S/NiFe 2 O 4 ∥Ni 1/2 Fe—S/NiFe 2 O 4 electrolyzer exhibits better stability and lower cell voltage in the fluctuating current density range of 10–500 mA/cm 2 . Particularly, the cell voltage of Ni 1/5 Fe—S/NiFe 2 O 4 ∥Ni 1/2 Fe—S/NiFe 2 O 4 is only approximately 3.91 V at an industrial current density of 500 mA/cm 2 , which is lower than that of the 20wt% Pt/C∥IrO 2 —Ta 2 O 5 electrolyzer (i.e., approximately 4.79 V). This work provides a promising strategy to develop excellent bifunctional electrocatalysts for fluctuating overall water splitting.
✓ 已验证
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 24
·2300838
·
IF 7.9
Ding Ma,Mengge Li,Bin Yao,Yongfeng Li,Zhanhui Ding,Jiayong Zhang,Chunkai Wang,Yuting Sun,Yue Liu,Xiaofei Sun,Yan Zhu
It is known that high carrier recombination at the p–n junction interface and low carrier separation ability (CSA) are two main problems resulting in low power conversion efficiency (PCE) of the Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cell. To resolve these problems, one CZTSSe solar cell is prepared through substituting B-doped CdS for CdS in a solar cell with the conventional structure of Ag/ITO/ZnO/CdS/CZTSSe/Mo/SLG and annealing B-doped CdS/CZTSSe/Mo/SLG prior to deposition of ZnO, ITO, and Ag electrode. By optimizing the B doping content in the CdS and annealing temperature and time of the B-doped CdS/CZTSSe, lattice mismatch between CdS and CZTSSe is decreased and width of depletion region is increased, leading to reduction in interfacial recombination, enhancement in CSA and intensity of incident light passing through the B-doped CdS, and so increase in PCE from 7.89% of CZTSSe solar cell using CdS as buffer layer to 10.62%. A mechanism of the increment of the PCE induced by B doping and annealing is suggested. This work proposes a method of increasing PCE of CZTSSe solar cell and advances a deeper understanding of the mechanisms behind various parameters in CZTSSe solar cells through theoretical analysis and calculations.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2021
·
IF 5.706
Qingrui Peng,Haijun Wang,Yongmei Xia,Xiang Liu
A multifunctional Zr-containing catalyst (FM-Zr-ARS) was successfully synthesized by a modulated hydrothermal synthesis route. Systematic characterization results supported the presence of robust porous inorganic-organic frameworks stabilized by the strong coordination interaction of Zr 4+ with oxygen-rich functional groups in Alizarin red S (ARS). Moreover, the -O-Zr-O- network in the FM-Zr-ARS structure formed a rich content of acid-base sites. In addition, the inherent sulfonic groups in ARS made the FM-Zr-ARS hybrids possess Brønsted acid sites. Therefore, under the synergistic catalysis of the multiple functional sites, FM-Zr-ARS showed remarkably high catalytic activity for γ-valerolactone (GVL) production from levulinate esters and furfural. Finally, 72.4 % and 97.7 % yields of GVL were obtained in the conversion of furfural and ethyl levulinate, respectively, after 8 h of reaction at 433 K. On the basis of the role of different functional sites, a plausible catalytic mechanism was presented for the conversion of biomass-derived furfural to GVL.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）