COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Hui Li,Qian Zhang,Hean Zhang,Qianling Cui,Chuanming Liu,Lidong Li
Organic room-temperature phosphorescence (RTP) shows high potential in optical fields, and self-assembly method via various non-covalent interactions is one facile and efficient way to enhance RTP performance. Herein, we investigated the RTP behaviors of three imidazole-based polymer films containing imidazole, methyl imidazolium, and benzyl imidazolium moieties, respectively. Their RTP behaviors and chemical structures were compared and discussed to explore the underlying structure-properties relationships. Owing to plenty of hydrogen bonds of polyacrylamide matrix to lock phosphors, imidazolium-based films gave an obvious green RTP due to cations and iodine anions-enhanced intersystem crossing. The blue RTP signals of imidazole-containing film was aroused by coordination with Zn 2+ ions due to crosslinking and heavy atom effects. Moreover, the RTP performance of benzyl imidazolium-based film was remarkably improved by host-guest complexation with cucurbit[7]uril, showing a long lifetime up to 230.6 ms. By utilizing the difference in their RTP lifetimes, information encryption application was successfully achieved as a proof of concept.
研究领域:
光学材料
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材料科学
·
物理化学
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Mengjing Wu,Rongrong Li,Kai Yang,Lijiang Yin,Weikang Hu,Xiong Pu
Aqueous Zn-ion batteries (AZIBs) are recognized as a promising energy storage system with intrinsic safety and low cost, but its applications still rely on the design of high-capacity and stable-cycling cathode materials. In this work, we present an intercalation mechanism-based cathode materials for AZIB, i.e. the vanadium oxide with pre-intercalated manganese ions and lattice water (noted as MVOH). The synergistic effect between Mn 2+ and lattice H 2 O not only expands the interlayer spacing, but also significantly enhances the structural stability. Systematic in-situ and ex-situ characterizations clarify the Zn 2+ /H + co–(de)intercalation mechanism of MVOH in aqueous electrolyte. The demonstrated remarkable structure stability, excellent kinetic behaviors and ion-storage mechanism together enable the MVOH to demonstrate satisfactory specific capacity of 450 mA h g −1 at 0.2 A g −1 , excellent rate performance of 288.8 mA h g −1 at 10 A g −1 and long cycle life over 20,000 cycles at 5 A g −1 . This work provides a practical cathode material, and contributes to the understanding of the ion-intercalation mechanism and structural evolution of the vanadium-based cathode for AZIBs.
研究领域:
材料科学
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能源存储
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电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Qiujiang Dong,Qianqiu Tian,Shiyu Zhang,Wanxing Zhang,Zanyu Chen,Xiaopeng Han,Wenbin Hu
Since single energy storage system like thermal storage has low energy conversion efficiency and large energy losses , integrated energy storage technology holds great promise in future energy storage modes. In order to alleviate the shortage of energy conversion efficiency in thermal storage, the combination with electrochemical energy storage will bring great improvements. However, most batteries have the limitations of operating temperature and dangerous highly reactive metals, which are not conducive to practical large-scale energy storage. To this regard, safe novel zinc-based molten salt batteries are developed which can operate in medium temperature environments and are free of highly reactive metals. The batteries realize high cell voltages of over 1 V in 300 °C by utilizing zinc metal anodes and MnO 2 , V 2 O 5 cathodes in Zn–K–Cl melts and can operate at large currents more than 30 mA cm −2 . The results show that Zn 2+ will continuously intercalate into the cathodes during discharge processes and resulting in the transformation of the oxide cathodes and the reduction of the cathode transition metals , which indicates the discharge mechanisms based on Zn 2+ intercalation. Therefore, the batteries have certain cycling capabilities which have been experimentally verified, illustrating the promising prospects of these novel zinc-based molten salt batteries.
研究领域:
能量存储
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电化学
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材料科学
✓ 已验证
DOI
高影响因子
Small Methods
·
2024
·
IF 10.7
Yajuan Niu,Qinbo Liu,Xu Ou,Yingjie Zhou,Zhe Sun,Feng Yan
Large amounts of small molecule dyes leak into the ecosystems annually in harmful and unsustainable ways. Polymer dyes have attracted much attention because of their high migration resistance, excellent stability, and minimized leakage. However, the complex synthesis process, high cost, and poor degradability hinder their widespread application. Herein, green and sustainable polymer dyes are prepared using natural dye quercetin (Qc) and CO 2 through a one-step process. The CO 2 -sourced polymer dyes show strong migration resistance, high stability, and can be degraded on demand. Additionally, the CO 2 -sourced polymer dyes showed unique responses to Zn 2+ , leading to significantly enhanced fluorescence, highlighting their potential for information encryption/decryption. The CO 2 -sourced polymer dyes can solve the environmental hazards caused by small molecule dye leakage and promote the carbon cycle process. Meanwhile, the one-step synthesis process is expected to achieve sustainable and widespread utilization of CO 2 -sourced polymer dyes.
研究领域:
材料科学
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环境科学
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化学
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可持续性
✓ 已验证
DOI
高影响因子
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
·
2023
·Vol. 39
·期 6
·1-13
·
IF 4.1
Zhu Di,Wu Caiyun,Niu Chenxin,Li Hong,Ge Fanglan,Li Wei
Corynebacterium glutamicum porphobilinogen synthase (PBGS) is a metal enzyme with a hybrid active site metal binding sequence. In this study, the porphobilinogen synthase gene of C. glutamicum was cloned and heterogeneously expressed in Escherichia coli. C. glutamicum PBGS was purified, and its enzymatic characteristics were analyzed. The results showed that C. glutamicum PBGS is a Zn 2+ -dependent enzyme, and Mg 2+ has allosteric regulation. The allosteric Mg 2+ plays a vital role in forming the quaternary structure of C. glutamicum PBGS. Based on the ab initio predictive structure modeling of the enzyme and the molecular docking model of 5-aminolevulinic acid (5-ALA), 11 sites were selected for site-directed mutagenesis. When the hybrid active site metal binding site of C. glutamicum PBGS is converted into a cysteine-rich motif (Zn 2+ -dependent) or an aspartic acid-rich motif (Mg 2+ /K + -dependent), the enzyme activity is basically lost. Four residues, D128, C130, D132, and C140, in the metal binding site, were the binding sites of Zn 2+ and the active center of the enzyme. The band migration, from the native PAGE, of five variants with mutations in the center of enzyme activity was the same as that of the variant enzymes as purified, individually adding two metal ion chelating agents. Their Zn 2+ active center structures were abnormal, and the quaternary structure equilibrium was altered. The destroyed active center affects the construction of its quaternary structure. The quaternary structural balance between octamer and hexamer through dimers was regulated by the allosteric regulation of C. glutamicum PBGS. The enzyme activity was also affected by the change of the active site lid structure and (α β) 8 -barrel structure caused by mutation. Structural changes in the variants were analyzed to understand C. glutamicum PBGS better.
研究领域:
生物化学
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分子生物学
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酶学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Peixian Huo,Xing Ming,Yueyang Wang,Qinglu Yu,Rui Liang,Guoxing Sun
Inherent dendrite growth and side reactions of zinc anode caused by its unstable interface in aqueous electrolytes severely limit the practical applications of zinc-ion batteries (ZIBs). To overcome these challenges, a protective layer for Zn anode inspired by cytomembrane structure is developed with PVA as framework and silk fibroin gel suspension (SFs) as modifier. This PVA/SFs gel-like layer exerts similar to the solid electrolyte interphase, optimizing the anode-electrolyte interface and Zn 2+ solvation structure. Through interface improvement, controlled Zn 2+ migration/diffusion, and desolvation, this buffer layer effectively inhibits dendrite growth and side reactions. The additional SFs provide functional improvement and better interaction with PVA by abundant functional groups, achieving a robust and durable Zn anode with high reversibility. Thus, the PVA/SFs@Zn symmetric cell exhibits an ultra-long lifespan of 3150 h compared to bare Zn (182 h) at 1.0 mAh cm −2 –1.0 mAh cm −2 , and excellent reversibility with an average Coulombic efficiency of 99.04% under a large plating capacity for 800 cycles. Moreover, the PVA/SFs@Zn||PANI/CC full cells maintain over 20 000 cycles with over 80% capacity retention under harsh conditions at 5 and 10 A g −1 . This SF-modified protective layer for Zn anode suggests a promising strategy for reliable and high-performance ZIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Nan Jiang,Jinlin Zhu,Chang Li,Xi Liu,Xinyu Guo,Chengcheng Zhu,Yan Chen,Yi Zhou,Wenjun Deng,Rui Li
Aqueous zinc-ion batteries (AZIBs) have recently been paid great attention due to their robust safety features, high theoretical capacity, and eco-friendliness, yet their practical application is hindered by the serious dendrite formation and side reactions of Zn metal anode during cycling. Herein, a low-cost small molecule, nicotinamide (NIC), is proposed as an electrolyte additive to effectively regulate the Zn interface, achieving a highly reversible and stable zinc anode without dendrites. NIC molecules not only modify the Zn 2+ solvation structure but also preferentially adsorb on the Zn surface than solvated H 2 O to protect the Zn anode and provide numerous nucleation sites for Zn 2+ to homogenize Zn deposition. Consequently, the addition of 1 wt% NIC enables Zn||Zn symmetric cells an ultra-long lifespan of over 9700 h at 1 mA cm −2 , which expands nearly 808 times compared to that without NIC. The advantages of NIC additives are further demonstrated in NaVO||Zn full cells, which exhibit exceptional capacity retention of 90.3 % after 1000 cycles with a high Coulombic efficiency of 99.9 % at 1 A/g, while the cell operates for only 42 cycles without NIC additive. This strategy presents a promising approach to solving the anode problem, fostering advancements in practical AZIBs.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shuang Chen,Jincheng Huang,Hui Wang,Xuming Liu,Guanghui Gao,Xin Liu,Qin Zhang
Hydrogel-based zinc ion hybrid supercapacitors (ZHSCs) with high flexibility and appealing energy/power densities have attracted increasing attention in energy storage fields. However, the Zn dendrite growth, water-related side reactions, and fast self-charge issues lead to severe performance degeneration of hydrogel-based ZHSCs. Herein, a zwitterion L-carnitine (CN) was integrated into hydrogel electrolyte to construct a dendrite-free and anti-corrosive hydrogel-based ZHSC with a slow self-discharge rate. CN can enter the Zn 2+ inner solvation sheath and isolate active water molecules from Zn anodes to induce homogeneous Zn 2+ deposition and inhibit undesired side reactions. The CN ionic complexes serving as ion transport channels enable the Zn 2+ to move along the migration channels, endowing the hydrogel electrolytes with a high Zn 2+ transference number of 0.847. Besides, CN with zwitterionic groups forms electrostatic interactions with cations and anions, which prevents the diffusion of moveable ions from the electrode surfaces to hydrogel electrolytes, thus effectively prolonging the self-discharge time of ZHSCs. Accordingly, the hydrogel-based ZHSCs exhibit dendrite-free and corrosive-free behaviors on Zn electrodes after long-time operation, presenting a capacitance retention of 75 % after 2000 charge and discharge cycles at 1 A/g. The hydrogel-based ZHSC also display a long self-discharge time of 3h, which is more than 9 times that of the one without CN. This work provides guidance on the design of dendrite-free and anti-self-discharge hydrogel-based zinc ion energy storage devices.
研究领域:
能量存储
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材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Yuanhao Chen,Xiaoshan Zhang,Yirong Liu,Haisheng Liu,Dechao Yu,Dawei Zhang
Gadolinium gallium garnet has been emerging as a starlet for preparing efficient luminescent materials, while via crystal field engineering the luminescence properties of rare-earth activator in its solid solution phosphors were scarcely explored. In this work, Er 3+ -doped Gd 3 Zn x Ga 5-2x Ge x O 12 (GZG 5- 2x G:Er 3+ ) solid solutions were prepared by high-temperature solid-state reaction, where a hetero-valent co-substitution strategy was implemented via introducing Zn 2+ /Ge 4+ pair to replace 2 Ga 3+ sites. X-ray diffraction Rietveld refinements confirm all samples crystallized into pure garnet phase. Upon 381 nm excitation, Er 3+ concentration was spectrally optimized to be about 10%, substituting the Gd 3+ sites, and via the Zn 2+ /Ge 4+ co-substitution, luminescence intensity of GZG 2 G:10%Er 3+ increases by more than 3 times in comparison with that of the baseline GZGG:10%Er 3+ sample. All the GZG 5-2x G:10%Er 3+ solid solution samples color in bright green under illumination using an ultraviolet ~ 365 nm lamp.Thermometric properties of Er 3+ 2 H 11/2 -4 S 3/2 thermally coupled levels of were systematically studied on basis of fluorescence intensity ratio principle. The GZG 5-2x G:10%Er 3+ all can perform temperature sensing over a wide temperature range of 298-573 K with a maximum relative sensitivity (S r ) above 1.20% K -1 and an applicable minimum temperature resolution (δT) around 0.4 K. Continuous exploration of solid solution-manipulating luminescent properties would develop novel thermometry probes (particularly for activator with spin-allowed transitions) with higher S r and smaller δT for practical optical temperature sensing.
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Xiongri Gan,Chenran Zhang,Xiushen Ye,Long Qie,Kaiyuan Shi
Zinc-ion hybrid capacitors (ZICs) that combine the characteristics of metal-ion batteries and supercapacitors are emerging to fulfill high energy-power demands. The objective of this study is to address the challenges in the practical implementation of metallic zinc for ZICs. In this work, we explore redox molecules based on anthraquinone compounds as electrolyte additives for the interfacial engineering of Zn anodes. The results reveal that the additives enable favorable solvation of Zn 2+ through metal ion-ligand coordination. The redox additives improve the lifespan of Zn//Zn cells from 50 to 1600 cycles at 2 mA cm −2 and 1 mAh cm −2 due to the suppression of parasitic reactions and the mitigation of by-product formations. The redox properties of additives strengthen the pseudocapacitive behavior of the ZICs, enabling efficient interfacial charge and mass transfer. The redox-enhanced device manifests an increased capacity of 195.0 mAh g − 1 with improved cycling stability, compared to that of 149.6 mAh g − 1 for the additive-free electrolyte. The universal strategy, based on the synergistic effects of redox additives, is demonstrated by a collection of molecules with similar structures. This work unveils a conceptually new approach that utilizes redox additives to formulate advanced electrolytes for aqueous energy storage.
研究领域:
电化学
·
能源存储
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Weifeng Chen,Guo Lv,Xiang Liu,Jiaying Yan,Qichun Zhang,Dong-Sheng Li
Although a few “on–off” approaches such as the pH-adjusting, temperature-adjusting, and controlling by light upon photo-catalysts have been reported, the “on–off” control of the on-broad and on-demand hydrogen production still faces many challenges. Herein, we first report the usage of Zn 2+ /EDTA-2Na system as an unprecedented, universal, high-efficient, and reusable “on–off” switch for the on-demand H 2 evolution upon the hydrolysis of ammonia borane, sodium borohydride and dimethyl aminoborane. This “on–off” switch has been demonstrated to be efficient and reusable in various heterogeneous and homogeneous metal catalysts for on-demand H 2 evolution. The detailed characterizations have confirmed that Zn 2+ ions attached and located at the surface of catalyst, covered its active sites on the surface, and turned off the H 2 production. The H 2 generation was switched on by the addition of EDTA-2Na, due to its strong coordination ability with Zn 2+ ions. In addition, the Zn 2+ /EDTA-2Na switch has been successfully reused several times without any activity loss in the “on–off” control of H 2 evolution. This switch is of great importance in the practical application for highly efficient, on-site and on-demand H 2 evolution under ambient conditions.
研究领域:
氢能
·
催化
·
材料科学
·
化学工程
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Jianming Zhao,Ziyuan Fang,Bingxuan Wang,Jinming Li,Abudureheman Bahatibieke,Haoye Meng,Yajie Xie,Jiang Peng,Yudong Zheng
The distinctive composition and functions of osteochondral structures result in constrained regeneration. Insufficient healing processes may precipitate the emergence of tissue growth disorders or excessive subchondral bone formation, which can culminate in the deterioration and failure of osteochondral tissue repair. To overcome these limitations, materials designed for osteochondral repair must provide region-specific modulation of the microenvironment and mechanical compatibility. To address these challenges, we propose a method to create continuous hydrogels with distinct structural and functional properties by a precise cross-linking method. We have developed an innovative polyurethane enriched with dimethylglyoxime, facilitating the coordinated loading and precise release of Zn 2+ . This strategy enables the meticulous control of alginate cross-linking, resulting in an elastic gradient hydrogel that closely resembles the osteochondral interface. The Se Se within the hydrogel effectively modulates the inflammatory microenvironment and fosters the M2 polarization of macrophages. The hydrogel's lower layer is designed to rapidly release Zn 2+ , thereby enhancing bone regeneration. The upper layer is intended to prevent bone overgrowth and stimulate chondrogenic differentiation. This dual-layer strategy allows targeted stimuli to each region, promoting the seamless integration of neoosteochondral tissue. Our study demonstrates the potential of this stratified hydrogel in achieving uniform and smooth osteochondral tissue regeneration.
研究领域:
生物材料
·
组织工程
·
生物医学工程
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）