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961.
Zhicong Lin Donghao Fan Guojiao Li Liming He Xianyan Qin Bin Zhao Qin Wang Wenlang Liang 《Macromolecular bioscience》2023,23(2):2200349
Diabetic mellitus is one of the leading causes of chronic wounds and remains a challenging issue to be resolved. Herein, a hydrogel with conformal tissue adhesivity, skin-like conductivity, robust mechanical characteristics, as well as active antibacterial function is developed. In this hydrogel, silver nanoparticles decorated polypyrrole nanotubes (AgPPy) and cobalt ions (Co2+) are introduced into an in situ polymerized poly(acrylic acid) (PAA) and branched poly(ethylenimine) (PEI) network (PPCA hydrogel). The PPCA hydrogel provides active antibacterial function through synergic effects from protonated PEI and AgPPy nanotubes, with a tissue-like mechanical property (≈16.8 ± 4.5 kPa) and skin-like electrical conductivity (≈0.048 S m−1). The tensile and shear adhesive strength (≈15.88 and ≈12.76 kPa, respectively) of the PPCA hydrogel is about two- to threefold better than that of fibrin glue. In vitro studies show the PPCA hydrogel is highly effective against both gram-positive and gram-negative bacteria. In vivo results demonstrate that the PPCA hydrogel promotes diabetic wounds with accelerated healing, with notable inflammatory reduction and prominent angiogenesis regeneration. These results suggest the PPCA hydrogel provide a promising approach to promote diabetic wound healing. 相似文献
962.
Minghao Xu Shuzhang Liang Wenqiang Zhang Lin Feng Kehan Chen Xue Deng Deyuan Zhang Jun Cai 《Journal of polymer science. Part A, Polymer chemistry》2023,61(1):100-107
The responsive color-changing bionic skin imitation of certain organisms such as chameleons has potential applications in the fields of chemical sensing and information transfer. Inspired by the cellular structure of the chameleon iridophores, a flexible and scalable fabrication strategy was proposed in the present study, which centers on the modular assembly of miniature color-changing pixel dots. The color-changing pixel dots were formed by self-assembling charged silica particles inside hydrogels and fabricated in bulk using microfluidic methods. The pixel dots were immobilized in hydrogels to encapsulate in a membrane structure similar to biological skin. With thermal stimulation, the bionic color-changing skin can change color from green to red and has an angle-independent color display with good environmental adaptability. 相似文献
963.
Jing Li Lijun Liang Hanxing Zhou Pengzhen Zhang Zhe Kong Xing Duan 《无机化学与普通化学杂志》2023,649(1):e202200261
Metal-organic frameworks (MOFs) are novel porous materials that have been extensively used in sensors, catalysis, gas storage and separation, and drug deliver owing to their adjustable pore size, large surface area and high porosity. Among diverse MOFs, UiO-66 can be a promising carrier for drug delivery due to high porosity and chemical stability. However, the adsorption mechanism of drugs in UiO-66 has not been identified and need a further investigation. Hence, we utilized molecular dynamic (MD) simulation to investigate the adsorption mechanism of UiO-66 as drug carriers. The MD simulation of UiO-66 exhibits the busulfan loading of 80 %, ibuprofen of 20 % and 5-fluorouracil of 30 %, respectively. We also demonstrated that the host-guest interaction between UiO-66 and drugs is dominated by the Van der Waals force. UiO-66 shows the highest affinity for busulfan compared with ibuprofen and 5-fluorouracil. In addition, it is certified the linear relation between the adsorption atoms and the interaction energy, which could help us to predict the interaction energy between drugs and UiO-66 by the contact atoms. 相似文献
964.
Prof. Qinghao Li Qi Liang Dr. Hui Zhang Sichen Jiao Dr. Zengqing Zhuo Dr. Junyang Wang Prof. Qiang Li Prof. Jie-Nan Zhang Prof. Xiqian Yu 《Angewandte Chemie (International ed. in English)》2023,62(5):e202215131
Charge compensation on anionic redox reaction (ARR) has been promising to realize extra capacity beyond transition metal redox in battery cathodes. The practical development of ARR capacity has been hindered by high-valence oxygen instability, particularly at cathode surfaces. However, the direct probe of surface oxygen behavior has been challenging. Here, the electronic states of surface oxygen are investigated by combining mapping of resonant Auger electronic spectroscopy (mRAS) and ambient pressure X-ray photoelectron spectroscopy (APXPS) on a model LiCoO2 cathode. The mRAS verified that no high-valence oxygen can sustain at cathode surfaces, while APXPS proves that cathode electrolyte interphase (CEI) layer evolves and oxidizes upon oxygen gas contact. This work provides valuable insights into the high-valence oxygen degradation mode across the interface. Oxygen stabilization from surface architecture is proven a prerequisite to the practical development of ARR active cathodes. 相似文献
965.
Shuangxi Jing Ren Sheng Dr. Xinxin Liang Prof. Dong Gu Dr. Yuhao Peng Prof. Juanxiu Xiao Prof. Yijun Shen Prof. Di Hu Prof. Wei Xiao 《Angewandte Chemie (International ed. in English)》2023,62(6):e202216315
An overall carbon-neutral CO2 electroreduction requires enhanced conversion efficiency and intensified functionality of CO2-derived products to balance the carbon footprint from CO2 electroreduction against fixed CO2. A liquid Sn cathode is herein introduced into electrochemical reduction of CO2 in molten salts to fabricate core–shell Sn−C spheres (Sn@C). An in situ generated Li2SnO3/C directs a self-template formation of Sn@C. Benefitting from the accelerated reaction kinetics from the liquid Sn cathode and the core–shell structure of Sn@C, a CO2-fixation current efficiency higher than 84 % and a high reversible lithium-storage capacity of Sn@C are achieved. The versatility of this strategy is demonstrated by other low melting point metals, such as Zn and Bi. This process integrates energy-efficient CO2 conversion and template-free fabrication of value-added metal-carbon, achieving an overall carbon-neutral electrochemical reduction of CO2. 相似文献
966.
Dr. Pengwei Li Linfang Yan Qingli Cao Prof. Chao Liang He Zhu Sihui Peng Yongpeng Yang Yuncai Liang Rudai Zhao Prof. Shuangquan Zang Prof. Yiqiang Zhang Prof. Yanlin Song 《Angewandte Chemie (International ed. in English)》2023,62(13):e202217910
Low-dimensional Ruddlesden-Popper (LDRP) perovskites still suffer from inferior carrier transport properties. Here, we demonstrate that efficient exciton dissociation and charge transfer can be achieved in LDRP perovskite by introducing γ-aminobutyric acid (GABA) as a spacer. The hydrogen bonding links adjacent spacing sheets in (GABA)2MA3Pb4I13 (MA=CH3NH3+), leading to the charges localized in the van der Waals gap, thereby constructing “charged-bridge” for charge transfer through the spacing region. Additionally, the polarized GABA weakens dielectric confinement, decreasing the (GABA)2MA3Pb4I13 exciton binding energy as low as ≈73 meV. Benefiting from these merits, the resultant GABA-based solar cell yields a champion power conversion efficiency (PCE) of 18.73 % with enhanced carrier transport properties. Furthermore, the unencapsulated device maintains 92.8 % of its initial PCE under continuous illumination after 1000 h and only lost 3 % of its initial PCE under 65 °C for 500 h. 相似文献
967.
Xiaoyu Liu Haolin Lu Prof. Shengli Zhu Prof. Zhenduo Cui Prof. Zhaoyang Li Prof. Shuilin Wu Prof. Wence Xu Prof. Yanqin Liang Prof. Guankui Long Prof. Hui Jiang 《Angewandte Chemie (International ed. in English)》2023,62(13):e202300800
It is challenging to design one non-noble material with balanced bifunctional performance for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) for commercial sustainability at a low cost since the different electrocatalytic mechanisms are not easily matchable for each other. Herein, a self-standing hybrid system Ni18Fe12Al70, consisting of Ni2Al3 and Ni3Fe phases, was constructed by laser-assisted aluminum (Al) incorporation towards full water splitting. It was found that the incorporation of Al could effectively tune the morphologies, compositions and phases. The results indicate that Ni18Fe12Al70 delivers an extremely low overpotential to trigger both HER (η100=188 mV) and OER (η100=345 mV) processes and maintains a stable overpotential for 100 h, comparable to state-of-the-art electrocatalysts. The synergistic effect of Ni2Al3 and Ni3Fe alloys on the HER process is confirmed based on theoretical calculation. 相似文献
968.
Reversible Li Plating on Graphite Anodes through Electrolyte Engineering for Fast-Charging Batteries
Xinyang Yue Jing Zhang Yongteng Dong Yuanmao Chen Zhangqin Shi Xuejiao Xu Xunlu Li Prof. Zheng Liang 《Angewandte Chemie (International ed. in English)》2023,62(19):e202302285
The difficulties to identify the rate-limiting step cause the lithium (Li) plating hard to be completely avoided on graphite anodes during fast charging. Therefore, Li plating regulation and morphology control are proposed to address this issue. Specifically, a Li plating-reversible graphite anode is achieved via a localized high-concentration electrolyte (LHCE) to successfully regulate the Li plating with high reversibility over high-rate cycling. The evolution of solid electrolyte interphase (SEI) before and after Li plating is deeply investigated to explore the interaction between the lithiation behavior and electrochemical interface polarization. Under the fact that Li plating contributes 40 % of total lithiation capacity, the stable LiF-rich SEI renders the anode a higher average Coulombic efficiency (99.9 %) throughout 240 cycles and a 99.95 % reversibility of Li plating. Consequently, a self-made 1.2-Ah LiNi0.5Mn0.3Co0.2O2 | graphite pouch cell delivers a competitive retention of 84.4 % even at 7.2 A (6 C) after 150 cycles. This work creates an ingenious bridge between the graphite anode and Li plating, for realizing the high-performance fast-charging batteries. 相似文献
969.
Yu Wang Bochun Liang Jiaxiong Zhu Geng Li Qing Li Ruquan Ye Jun Fan Chunyi Zhi 《Angewandte Chemie (International ed. in English)》2023,62(23):e202302583
Constructing a reliable solid-electrolyte interphase (SEI) is imperative for enabling highly reversible zinc metal (Zn0) electrodes. Contrary to conventional “bulk solvation” mechanism, we found the SEI structure is dominated by electric double layer (EDL) adsorption. We manipulate the EDL adsorption and Zn2+ solvation with ether additives (i.e. 15-crown-5, 12-crown-4, and triglyme). The 12-crown-4 with medium adsorption on EDL leads to a layer-structured SEI with inner inorganic ZnFx/ZnSx and outer organic C−O−C components. This structure endows SEI with high rigidness and strong toughness enabling the 100 cm2 Zn||Zn pouch cell to exhibit a cumulative capacity of 4250 mAh cm−2 at areal-capacity of 10 mAh cm−2. More importantly, a 2.3 Ah Zn||Zn0.25V2O5⋅n H2O pouch cell delivers a recorded energy density of 104 Wh Lcell−1 and runs for >70 days under the harsh conditions of low negative/positive electrode ratio (2.2 : 1), lean electrolyte (8 g Ah−1), and high-areal-capacity (≈13 mAh cm−2). 相似文献
970.
Lei Lv Ruihu Lu Jiexin Zhu Ruohan Yu Dr. Wei Zhang Enhui Cui Xingbao Chen Yuhang Dai Lianmeng Cui Dr. Jiong Li Prof. Liang Zhou Prof. Wei Chen Dr. Ziyun Wang Prof. Liqiang Mai 《Angewandte Chemie (International ed. in English)》2023,62(25):e202303117
Bismuth-based materials have been recognized as promising catalysts for the electrocatalytic CO2 reduction reaction (ECO2RR). However, they show poor selectivity due to competing hydrogen evolution reaction (HER). In this study, we have developed an edge defect modulation strategy for Bi by coordinating the edge defects of bismuth (Bi) with sulfur, to promote ECO2RR selectivity and inhibit the competing HER. The prepared catalysts demonstrate excellent product selectivity, with a high HCOO− Faraday efficiency of ≈95 % and an HCOO− partial current of ≈250 mA cm−2 under alkaline electrolytes. Density function theory calculations reveal that sulfur tends to bind to the Bi edge defects, reducing the coordination-unsaturated Bi sites (*H adsorption sites), and regulating the charge states of neighboring Bi sites to improve *OCHO adsorption. This work deepens our understanding of ECO2RR mechanism on bismuth-based catalysts, guiding for the design of advanced ECO2RR catalysts. 相似文献