JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 33
·15919-15929
·
IF 3.553
Chen Yanping,Li Xiuting,Li Yaogang,Zhang Qinghong,Hou Chengyi,Wang Gang,Wang Hongzhi
The development of flexible dielectric polymers with robust temperature durability, excellent mechanical properties and high transparency will be of great significance for the soft electronics. In current work, a highly fluorinated polyimide (hF-PI) material was successfully synthesized. By using (3-Aminopropyl) triethoxysilane as “bridge” and controlling the humidity rigidly, transparent polyimide films with smooth surface and tight adhesion to a strong substrate was prepared. As well, the mechanism of non-transparent hF-PI film formation in an ambient atmosphere at a low concentration was clarified. Based on the high temperature resistance of the hF-PI, the indium–zinc oxide (IZO) semiconductor film was successfully prepared on hF-PI film by the simple eco-friendly aqueous route. The IZO thin-film transistor using hF-PI film as insulating layer exhibited highly transparent and excellent electrical performance in the carrier mobility and the on/off current ratio. In addition, the operating voltage was greatly reduced by physically doping with carbon nanotube, while the devices still maintained good transparency.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2021
·Vol. 22
·期 16
·8668
·
IF 5.924
Jie Li,Shiyi Wang,Huayin Li,Yuan Tan,Yunjie Ding
The synthesis of ester compounds is one of the most important chemical processes. In this work, Zn-Mg-Al mixed oxides with different Zn2+/Mg2+molar ratios were prepared via co-precipitation method and supported gold nanoclusters to study the direct oxidative esterification of aldehyde and alcohol in the presence of molecular oxygen. Various characterization techniques such as N2-physical adsorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and CO2temperature programmed desorption (TPD) were utilized to analyze the structural and electronic properties. Based on the results, the presence of small amounts of Zn2+ions (~5 wt.%) provoked a remarkable modification of the binary Mg-Al system, which enhanced the interaction between gold with the support and reduced the particle size of gold. For oxidative esterification reaction, the Au25/Zn0.05MgAl-400 catalyst showed the best performance, with the highest turnover frequency (TOF) of 1933 h−1. The active center was believed to be located at the interface between metallic gold with the support, where basic sites contribute a lot to transformation of the substrate.Keywords:gold catalyst;cluster;hydrotalcite;oxidative esterification;methyl isobutyrate
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Inorganic Chemistry Frontiers
·
2016
·Vol. 3
·期 11
·1363-1375
·
IF 4.532
Hong-Qing Li,Zhong-Yu Ding,Yao Pan,Chun-Hua Liu,Yuan-Yuan Zhu
In this study, we report the synthesis of five one-dimensional Zn(II)-based metallo-supramolecular polymers P0–4 through 1 : 1 complexation of Zn(SO3CF3)2 or Zn(ClO4)2 with ditopic ligands L0–4 which contain two pyridine-dioxazole (pybox) units connected by a rigid conjugated oligo(1,4-phenylene) linker. The new Zn(II)-based polymers displayed relatively high quantum yields in solution and the solid state and showed tunable luminescent colors from blue to yellow owing to the conjugation effect of the ligand and the intra-ligand charge transfer (ILCT) between the coordination site and the chromophore of the ligand. Moreover, the polymer solution could exhibit white light emission by simply regulating the metal/ligand ratio or mixing different polymers. The polymers have been further explored as fluorescent chemosensors (FCs) for detecting nitroaromatic explosives. Among others, P1 possessed the highest capability for detecting picric acid (PA).
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FUEL PROCESSING TECHNOLOGY
·
2019
·
IF 4.507
Xiaoping Wu,Qiao Zhang,Lungang Chen,Qiying Liu,Xinghua Zhang,Qi Zhang,Longlong Ma,Chenguang Wang
The development of thermally stable Pt-based catalysts with superior performance for propane dehydrogenation reactions remains a daunting challenge. In this study, a series of PtSn-Mg(Zn)AlO catalysts with different Zn and Pt contents were synthesized by the anion-exchange method for the propane dehydrogenation reaction. To investigate the influence of Zn on the reaction performance and the catalyst structure, the prepared catalysts were characterized with several analytical techniques, including XRD , TEM, HRTEM, H 2 -TPD and CO pulse chemisorption . A good propane conversion (initially higher than 55% and averaging 45.2% over a period of 2 h) and propene selectivity (higher than 99%) were obtained experimentally with PtSn-Mg(3Zn)AlO at 550 °C. The results demonstrated that Pt provided the active sites and that Zn was a promoter. The HRTEM and CO pulse chemisorption results indicated that the addition of Zn to the PtSn-MgAlO catalyst can stabilize the dispersion of metal particles and thus inhibit the sintering of Pt particles. Furthermore, the activities of the used catalysts were almost recovered through reaction-regeneration cycles with the burning-off of coke during five cycles.
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ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jiaqi Huang,Xiaowei Chi,Jianhua Yang,Yu Liu
This work proposes a dual-cross-linked gel solid electrolyte (SE), here defined as Zn-re-inforced sodium alginate–polyacrylamide SE (Zn-reinforced SA–PAM SE), in which Na+ and Zn2+ coexist. The SE shows a high conductivity of 19.74 mS cm–1. Compared to the pure PAM gel, the tensile strength and compressive strength of Zn-reinforced SA–PAM SE are significantly enhanced to be 674.28 kPa and 16.29 MPa, respectively, because of the strengthening mechanism of Zn2+ cross-linked SA. Based on such a robust electrolyte, a novel hybrid cell is developed by involving Na0.5FeFe(CN)6–carbon nanotube composites (PB@CNT) as the Na+ intercalation-type cathode and metallic Zn as the plating anode. The hybrid cell shows an extremely high stability for 10,000 cycles with a record little capacity loss of 0.0027% per cycle, as Zn-reinforced SA–PAM SE successfully inhibits free water molecules from occupying low-spinning metallic sites (Fe–C) in Na0.5FeFe(CN)6. Ex situ X-ray photoelectron spectroscopy reveals that the dissolution of Na0.5FeFe(CN)6 is highly reduced by 79.5%. It is further noted that the corrosion and dendrites at the Zn2+/Zn plating anode are greatly hindered for the robust electrolyte. This work gives a pathway for the development of new aqueous ion batteries.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaosha Cui,Yaxiong Zhang,Situo Cheng,Yupeng Liu,Zhipeng Shao,Zhenheng Sun,Yin Wu,Hongzhou Guo,Jiecai Fu,Erqing Xie
The mild electrolyte working environment of rechargeable aqueous Zn-ion batteries (AZIBs) features its promising characteristic and potential application for large-scale energy storage system. However, the poor cycling stability significantly hinders the broad application of AZIBs due to the complex electrochemical conversion reactions during charge-discharge process. Herein, we propose a strategy to improve the electrochemical performance of AZIB by enhancing the successive electrochemical conversion reactions. With a rational design of electrode, an even homogeneous electric field can be achieved in the cathode side, resulting to significantly enhanced efficiency of successive electrochemical conversion reactions. Charge storage mechanism studies reveal that the reversibility behaviors of byproducts alkaline zinc sulfate (ZHS) can dramatically determine the H + /Zn 2+ de/intercalation process, and a high reversibility characteristic ensures the facilitated electrochemical kinetics. As expected, the resultant AZIB possesses outstanding electrochemical performance with a high specific capacity of 425.08 mAh⋅g −1 at 0.1 A⋅g −1 , an excellent rate capacity of about 60% (246.6 mAh⋅g −1 at 1 A⋅g −1 ) and superior cycling stability of 93.7% after 3000 cycles (at 3 A⋅g −1 ). This effective strategy and thinking proposed here may open a new avenue for the development of high-performing AZIBs.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chun Sun,Jiazhi Cui,Yiwei Zhao,Zhihui Deng,Yelin Ding,Kai Lian,Junhuan Zhao,Zhongjie Zhai,Jiachen Han,Zhengtong Wang,Xiaohui Liu,Wengang Bi
Environmentally friendly metal halides with reversible transformation of structure and luminescence properties have become a focal point of interest in the areas of anti-counterfeiting and sensors. Herein, Zn 2 + -doped DMAMnBr 3 and Mg 2+ -doped DMA 2 MnBr 4 were successfully synthesized using the evaporation-crystallization method. After doping Zn 2+ in DMAMnBr 3 , the photoluminescence quantum yield (PLQY) is enhanced from 18 % to 40 %. For DMAMnBr 3 , the introduction of Zn 2+ ions also accelerates the color-changing rate upon water absorption due to the tendency of Zn 2+ to form tetrahedral structures. Besides, the DMAMn 0.8 Zn 0.2 Br 3 exhibits excellent sensitivity. Hence, a temperature detection software is developed, which is capable of monitoring temperatures in the range of 323–403 K. For DMA 2 MnBr 4 , the incorporation of Mg 2+ ions not only leads to the enhancement of PLQY but also reduction of melting temperature. The theoretical calculation indicates that the decrease in the melting point is caused by the reduction in lattice energy. Utilizing this characteristic, we produced rewritable paper with excellent reusability. Finally, anti-counterfeiting labels were created using both DMAMn 0.8 Zn 0.2 Br 3 and DMA 2 Mn 0.95 Mg 0.05 Br 4 . The concealed information can be deciphered through straightforward heating. These results hold promise for extending the potential applications of manganese-based perovskite materials.
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Materials Today Communications
·
2024
·
IF 3.7
Qihao Tang,Ge Chu,Yishun Xie,Chengmi Yang,Fangzhou Tang,Ziwei Li,Shaorong Lu,Lin Qin,Zhewei Yang,Xin Fan
Lithium-ion capacitors (LICs) combine the advantages of lithium-ion batteries and supercapacitors, demonstrating great application prospects in the fields of large-scale renewable energy, and have been attracting increasing attention. Regrettably, the power capability of LICs is significantly hindered by the incongruent kinetics between battery-type anodes and capacitive cathodes. To address this challenge, in this study, a carbon anode derived from Zn/Co bimetallic metal-organic framework (MOF), specifically the Zn 80 Co 20 -PC, is synthesized through a direct carbonization process. Benefitting from the optimal degree of graphitization, substantial specific surface area, and comprehensive porous structure, the incongruent behaviour is effectively alleviated. As a result, the battery assembled with Zn 80 Co 20 -PC yielded an impressive capacity of 397.1 mAh g −1 at a current density of 0.1 A g −1 and a commendable rate capability of 109.6 mAh g −1 at 1.6 A g −1 . Moreover, the LICs crafted with a pre-lithiated Zn 80 Co 20 -PC anode and an activated carbon (AC) cathode (designated as Zn 80 Co 20 -PC//AC LICs) exhibit a notable energy density of 123 Wh kg −1 and an elevated power density of 7150.3 W kg −1 , maintaining exceptional durability through 5000 cycles. This study introduces innovative strategies for integrating advanced anode materials into lithium-ion capacitors.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Li Luo,Zhen Fan,Zhaobin Zhang,Danyang Liu,Guofa Li,Lishuang Wang,Bingsuo Zou
SnO2 nanoparticles (NPs) have been used as an electron transport layer (ETL) in quantum dot light-emitting diodes (QLEDs) to achieve stable and high-performance devices. However, SnO2 NPs with high electron mobility cause the problem of imbalanced charge injection and transport in QLEDs. Meanwhile, the SnO2 NPs synthesized at low temperature have hydroxyl (−OH) groups, which could damage the performance of QLEDs. Here, Zn doping was applied to modulate the properties of SnO2 NPs and achieve better carrier balance in green CdSe/ZnS QLED. The maximum current efficiency (CE) of QLED with 5 wt % Zn-doped SnO2 NPs is 2.3-fold higher than that of SnO2-based QLED. In addition, a small-molecule 4,4′-bis(carbazole-9-yl)-1,1′-biphenyl (CBP)-mixed poly(9-vinylcarbazole) (PVK) layer was used as a hole transport layer to facilitate the hole injection and charge balance. As a result, a maximum external quantum efficiency (EQE) of 5.03% is obtained for the best performance device. The T50 lifetime at a luminance of 100 cd/m2, for a device based on 5 wt % Zn-doped SnO2 ETL, is 9141 h, which is 2.29-fold longer than the reference one. This work provides a new strategy to obtain high-performance and stable display arrays.
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Journal of Physical Chemistry C
·
2024
·
IF 3.3
Hai Wang,Gaiqing Zhao,Weimin Li,Yue Wang,Tao Yang,Shun Watanabe,Xiaobo Wang
In this study, an artificial interfacial layer (PANI-C) for Zn anode consisting of hydrophilic cellulose nanocrystals and polyaniline was designed to address the dendrite growth problem at the electrode/electrolyte interface in aqueous Zn-ion batteries. Benefiting from the synergistic effect of high electronegativity and abundant surface functional groups, PANI-C accelerates the ordered migration of Zn2+, homogenizes the cosolvent of Zn2+ and effectively improves the reversibility of the zinc plating process, with strong zincophilicity and inhibition of dendrites. In addition, the PANI-C layer has abundant carbonyl adsorption sites uniformly distributed at the molecular level, and exhibits good ionic modulation ability during the Zn2+ plating/stripping process. The Zn||Cu asymmetric cell exhibited excellent reversibility with an average Coulombic efficiency of 99.3% after 1000 cycles at 1 mA cm–2. The assembled PANI-C@Zn//V2O5 full cell maintains 94.6% of its original capacity at 1 A g–1 after 2500 h, with an ultralong cycling time of 1500 h instantly even at a high current density of 5 A g–1. This strategy provides insight into the design of dendrite-free zinc anodes and highlights their applicability for practical zinc-based energy storage in the future.
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Advanced Healthcare Materials
·
2025
·
IF 9.6
Haibo Liu,Zhongyi Sun,Mengting Yin,Jing Ru,Xiaohao Liu,Ziyan Chen,Yating Liu,Wang Sun,Longpo Zheng,Xinyu Zhao,Feng Chen
Diabetic oral ulcers pose a significant challenge in healing due to persistent inflammation. Despite local therapeutic interventions remaining the primary mode of treatment, the dynamic nature of the oral cavity, characterized by continuous muscular activity and salivary secretion, poses barriers to sustained drug retention and thereby limits therapeutic efficacy. To address this issue, an approach has been devised that aims to facilitate transdermal delivery of bioactive components to promote the healing of diabetic oral ulcers. A multifunctional soluble microneedle (MN) patch is prepared using γ-polyglutamic acid (γ-PGA), which is loaded with quercetin (Qu)-modified Mg−Zn layered hydroxide salt (LHS) nanosheets (LHSQ) with anti-inflammatory, antimicrobial and pro-angiogenic bioactivities to combat the diabetic oral ulcers. These findings demonstrate that the LHSQ-loaded MN (LHSQ-MN) patches are capable of effectively penetrating the oral mucosa. In a rat model of diabetic oral ulcers, the application of LHSQ-MN patches is found to facilitate the establishment of regeneration sites, regulate the inflammatory microenvironment of damaged tissues, exhibit potent antibacterial effects, expedite the reconstitution of the mucosal epithelium, and accelerate ulcer healing through the promotion of angiogenesis. These outcomes highlight the potential of LHSQ-MN patches as a promising therapeutic strategy for the management of oral ulcers in diabetic patients.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Yu Han,Kai Zhang,Ning Xin,Xintao Gao,Guohua Ma,Jingtong An,Yantao Li
Despite recent advancements in lipid nanoparticles (LNPs)-based messenger RNA (mRNA) delivery, significant challenges persist in the structural optimization and functional modulation of their components for cancer immunotherapy, particularly regarding inadequate organ-specific targeting, and insufficient immune activation. Notably, metal ions have demonstrated emerging immunomodulatory potential, yet their coordinated self-assembly within LNPs as adjuvants to enhance the immunotherapeutic efficacy remains largely unexplored. To address these limitations, we combine newly designed imidazole-based LNPs with functional metal ions (Zn 2+ ) to develop novel Zn-coordinated LNP-based mRNA vaccines. A total of 48 imidazole-based ionizable lipids were designed and synthesized, among which C2–13 LNPs emerged as the top-performing formulation in terms of transfection efficiency. By innovatively incorporating Zn 2+ into C2–13 LNPs via coordination interaction, we further developed the novel metal-coordinated mRNA delivery systems, referred to as Zn-C2–13 LNPs. Compared to their non-metal counterparts, Zn-C2–13 LNPs exhibited markedly improved transfection efficiency and antigen presentation in vitro . Impressively, the synergistic effect of the optimized LNP formulation and Zn 2+ in the Zn-C2–13/mOVA systems (Zn-C2–13 LNPs loading ovalbumin mRNA) resulted in superior spleen-selective expression and immune response, significantly boosting the efficacy of cancer immunotherapy in the B16F10 ovalbumin-expressing (B16F10-OVA) melanoma tumor model. Collectively, this novel metal-coordinated LNPs improve specific organ targeting and immune responses, presenting a promising strategy to advance mRNA vaccine-based cancer immunotherapy.
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