INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Yingwu Zhou,Yujie Ban,Weishen Yang
Reversible phase transformations (RPTs) of metal–organic frameworks not only create material diversity but also promise a self-restoration of crystals in a controllable manner. However, there are only limited examples because seeking for a convenient and effective trigger for RPTs, especially for RPTs with respect to spatiotemporal harmony in cleavage and reconstruction of metal–linker chemical bonds, is challenging. In this work, we found that zeolitic imidazolate framework (ZIF)-108 with Zn–N coordination bonds showing moderate strength was an ideal platform. We reported three crystal phases of ZIF-108, namely, sodalite (SOD), diamondoid (DIA), and large pore_sodalite (lp_SOD) topologies, and identified RPTs between phases: (1) when exposed to water or water vapor, the SOD structure could transform to a compact DIA version as a result of the decomposition of four-membered rings and synchronous reorganization of six-membered rings. Then, the DIA structure could also return back to SOD when soaked in dimethylformamide (DMF) or DMF vapor. (2) High-temperature treatment of SOD gives rise to lp_SOD, which then reverts to SOD by DMF. (3) lp_SOD could also be compressed into the DIA phase by water or water vapor and can then be restored via a two-step treatment, namely, soaking in DMF (DIA → SOD) right before a high-temperature therapy (SOD → lp_SOD). From the perspective of the separation utility, we found that the lp_SOD version of ZIF-108, relative to SOD-structured ZIF-108, can produce mixed matrix membranes having an interesting interfacial structure with the polymer chains, though both share the same chemical composition. We verified that the large pore of lp_SOD can allow being penetrated by polymer chains, which contributed to not only reinforcing the bi-phase interface but also sharpening the molecule sieve properties of fillers toward CO2 and CH4.
研究领域:
材料科学
·
化学工程
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DOI
PubMed
高影响因子
Nanoscale
·
2015
·Vol. 7
·期 40
·16666-16670
·
IF 7.394
Xiaoli Zhang,Chunming Dong,Weiyun Huang,Huaimin Wang,Ling Wang,Dan Ding,Hao Zhou,Jiafu Long,Tingliang Wang,Zhimou Yang
Responsive hydrogels hold great potential in controllable drug delivery, regenerative medicine, sensing, etc. We introduced in this study the first example of a photo-responsive protein for hydrogel formation. Based on the first example of the crystal structure of a photo-responsive protein, Arabidopsis thaliana protein UVR8, we designed and expressed its derived protein UVR8-1 with a hexa-peptide WRESAI. We also prepared supramolecular nanofibers with a TIP-1 protein at their surface. The simple mixing of these two components resulted in rapid hydrogel formation through the specific interactions between the protein TIP-1 and the peptide WRESAI. Since the protein could show a reversible dimer–monomer transformation, the resulting gels also showed a reversible gel–sol phase transition which was controlled by photo-irradiation. The photo-controllable gel–sol phase transition could be applied for protein delivery and cell separation.
研究领域:
生物化学
·
材料科学
·
分子生物学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Qing Xu,Tianwei Zhang,Mengjia Liu,Min Wang,Kun Cao,Rong Chen
Luminescent perovskite nanocrystals (NCs), possessing the advantages of low cost, easy detection, and excellent luminescence, are becoming more and more significant in the fields of information encryption and decryption. Most hydrochromic perovskite NCs for information encryption have moderate reversibility and are easily passively decrypted by water in the moist air, limiting their practical applications. Herein, a lyochromic material is synthesized based on reversible phase transition between luminescent CsPbBr3–HBr (pretreating CsPbBr3 with HBr) and nonluminescent Cs4PbBr6, exhibiting excellent reversibility in 50 cycles triggered by CsBr solution. HBr treatment boosts the ion migration of NCs via diminishing surface ligands and passivating Br vacancy, assisting CsBr concentration acting as a crucial factor in dynamic ion exchange equilibrium between the trigger solution and CsPbBr3–HBr. By utilizing CsPbBr3–HBr as a safety ink, the CsBr-triggered photoluminescence switch has been demonstrated to be reproducible, stable, and reliable for information encryption and decryption.
研究领域:
材料科学
·
光学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Cong Chen,Minjie Shi,Yue Zhao,Cheng Yang,Liping Zhao,Chao Yan
Although manganese dioxide (MnO 2 ) is of great promise as the cathode material for aqueous Zn-ion batteries (ZIBs), its capacity decreases sharply during cycles due to the irreversible phase transition and Mn dissolution, consequently hindering the large-scale practical application. Herein, for the first time, a novel Al-intercalation engineering of MnO 2 cathode has been proposed for aqueous ZIBs, in which the structural regulation and Zn 2+ storage performance of Al-intercalated MnO 2 (denoted as AMO) cathode are deeply investigated. Electrochemical testing results indicate significant improvement in specific capacity (401.7 mAh g −1 ) and cycling retention (~94.5% over 2000 cycles) of the AMO cathode, which is owing to the effective Al-intercalation that result in the formation of strong Al-O bonds in tunnel-type MnO 2 framework. This reasonable configuration not only optimizes charge/ion state and electronic bandgap, but also ensures reversible phase transition and alleviates the Mn dissolution of AMO cathode, which are further demonstrated by the density functional theory (DFT) calculations and in-situ Raman investigation upon charging-discharging. As a proof of concept, coin-type and flexible aqueous ZIBs based on such AMO cathode are effectively fabricated, and they both achieve excellent electrochemical behaviors, revealing the great potential applications in energy technologies and portable/wearable electronics.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ChemSusChem
·
2023
·Vol. 16
·期 15
·e202300244
·
IF 8.4
Shuai Tong,Hui Pan,Hang Liu,Xiaoyu Zhang,Xiangyu Liu,Min Jia,Yahao Kang,Yong Yuan,Xinyi Du,Xiaohong Yan
Graphical The improvement of the energy density of Na 3 V 2 (PO 4 ) 2 F 3 (NVPF) is now related to the utilization of the third Na + , which was reported to be electrochemically inaccessible. Our research revealed that Ti-doped Na 3 V 2 (PO 4 ) 2 F 3 (NVTPF) could be overcharged at approximately 4.9 V without forming the irreversible metastable phase, which means the electrochemical inactive Na + could be effectively attracted without affecting the subsequent electrochemical behavior. Polyanionic material, specifically the NASICON-type material, is considered a promising cathode material for Na-ion batteries (SIBs) because of its stable structure and high operating voltage. Further, it improves the energy density correlated with the well utilization of all Na in the compound. For Na 3 V 2 (PO 4 ) 2 F 3 (NVPF), the extraction of the third Na, reported as the electrochemical inactivated, can be realized at a high voltage region while forming an irreversible tetragonal phase. In this study, we introduce Ti doping to the Na 2 VTi(PO 4 ) 2 F 3 (NVTPF) material; we reveal that the Ti-doped NVTPF could effectively suppress the irreversible phase transformation, thus successfully harnessing Na in a wide voltage range. Experimental study discloses that the Ti-substituted Na 2 VTi(PO 4 ) 2 F 3 could take up the Na + from Amam phase to Cmc21 phase between 1.0 V and 4.8 V reversibly accounting for the 2 Na + transportation that shows favorable Na + kinetics and structural stability. Our research provides the strategy to stabilize the polyanion structure upon charging at a high voltage range and inspires the utilization of full sodium in the polyanionic materials, which could be considered as a material design for future conventional applications.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Ketai Ren,Jinkai Qiu,Honglai Liu,Hongfang Song,Quan Li,Jingkun Li
Fluorophosphate Na3V2(PO4)2F3 (NVPF) is considered a promising cathode material for sodium-ion batteries, while its specific capacity is still insufficient compared to that of cathodes of lithium-ion batteries. Activating the third Na+ effectively increases the specific capacity of NVPF. However, the accompanied irreversible phase transition deteriorates the cycling stability. In this study, we synthesized sodium-rich Na3.5V1.5Mg0.5(PO4)2F3 (NVMPF) through doping low-valence Mg2+ with a high content, which introduces an extra 0.5 Na+ in the crystal lattice. The extra 0.5 Na+ remains in the lattice of NVMPF, acting as “pillars” to suppress the irreversible phase transition after the third Na+ is extracted by activating the V5+/4+ redox couple at a high voltage. Thus, NVMPF achieves a specific discharge capacity of 170 mAh g–1 between 1.0 and 4.7 V while maintaining the tetragonal structure of NVMPF. This work offers insightful guidelines to achieve the full utilization of three Na+ with enhanced cycling stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yongfei Li,Yujiao Wang,Qing Sun,Jiaoyi Ning,Liang Li,Jiakai Liu,Daliang Zhang,Ke Xin Yao
Recently, halide perovskites have been recognized for their thermochromic characteristics, showing significant potential in information encryption applications. However, the limited luminescence color gamut hinders the encryption of complex multicolor information. Herein, for the first time, multicolor thermochromic perovskites with luminescence covering the entire visible spectrum have been designed. Oleylammonium halide salts facilitate a reversible phase transformation between nonluminescent Cs4PbX6 nanocrystals (NCs) and luminescent CsPbX3 NCs upon heating or cooling. This process occurs without the need for external addition or removal of ligands or metal salts, enabling efficient and intelligent information encryption. A proof-of-concept demonstration successfully encrypts and decrypts multicolor digital information. This work not only advances the understanding of phase transformations in perovskites but also highlights their significant potential for information encryption applications.
研究领域:
材料科学
·
光学工程
·
信息加密技术
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产品关联
DOI
PubMed
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Jingjun Zhai,Haocheng Ji,Wenhai Ji,Rui Wang,Zhongyuan Huang,Tingting Yang,Chaoqi Wang,Taolve Zhang,Ziwei Chen,Wenguang Zhao,Akhil Tayal,Lei Jin,Jun Wang,Yinguo Xiao
Layered transition metal oxides have been broadly studied due to their great potential in application as cathodes for sodium-ion batteries. However, many single-phase layered transition metal oxides, especially those crystallized in P2- or O3-type structure, possess their individual characteristics incurring unsatisfactory overall performances with respect to the reversible capacity, rate capability, and cycling stability. Here, an effective strategy of constructing the P2/O3 biphasic structure is realized in layered cathode Na 0.7 Ni 0.4 Mn 0.4 Ti 0.2 O 2 through Ti substitution. Through high-resolution scanning transmission electron microscopy and X-ray diffraction, the formation of P2/O3 intergrowth structure was clarified and the proportion of the two phases was determined. Benefitting from the presence of intergrowth structure, the layered cathode provides a competitive rate capability of 100 mAh/g at a high rate of 5 C as well as a prominent cycling stability of 80.04% capacity retention after 300 cycles at 5 C. The improved performance is closely related to the highly reversible phase transition process from P2/O3 to OP4/P3 with less strain and enhanced Na + kinetics. These findings evidence that exploring novel multiphase cathodes is an effective approach to improve the electrochemical performances of cathode for sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Shutao Zhang,Liang Chen,Daojie Dong,Yulin Kong,Jun Zhang,Junru Liu,Zhaoping Liu
In this work, five vanadium oxide materials with a series of pre-intercalated cations A (AmV2O5), including Zn2+, Mg2+, NH4+, Li+, and Ag+, have been successfully prepared by a two-step method. All of them possess binary monoclinic and orthorhombic V2O5 phases with an open layered structure that allows the ionic storage and diffusion of hydrated cations. The interlayer space for the monoclinic V2O5 phase is strongly dependent on the radii of hydrated cations A, while the one for the orthorhombic V2O5 phase remains the same regardless of the radii of cations A. Among them, AmV2O5 with pre-intercalated Zn2+ (ZVO) has the best storage ability of Zn2+ with a reversible capacity close to 400 mAh g–1, and AmV2O5 with pre-intercalated Ag+ shows the highest rate capacity with a nearly 40% capacity retention at a current of 20 A g–1 (≈25 C). Kinetic studies have clearly shown that pseudocapacitive behavior dominates the electrochemical reaction on ZVO. During the Zn2+ (de)intercalation reaction, a highly reversible transformation of binary monoclinic or orthorhombic V2O5 phases into a single triclinic ZnxV2O5·nH2O phase is demonstrated on ZVO. Vanadium atoms are identified as the redox centers that undergo the mutual transition among the chemical states of V3+, V4+, and V5+. They together with oxygen atoms constitute reasonable V–O coordination polyhedra to generate a layered structure with a suitable interlayer space for the insertion or removal of zinc ions. Actually, the intrinsic coordination chemistry changes between VO5 square pyramids and VO6 octahedra account for the phase transformation during the Zn2+-(de)intercalation reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RARE METAL MATERIALS AND ENGINEERING
·
2018
·
IF 0.29
Ji Haining,Liu Dongqing,Cheng Haifeng,Zhang Chaoyang,Yang Lixiang,Zheng Wenwei
Vanadium dioxide (VO 2 ) undergoes a Mott metal-insulator transition (MIT) close to room temperature, and has been suggested as a candidate for use in smart window and adaptive infrared camouflage. Here we report the synthesis of uniform free-standing VO 2 nanowires using a novel hydrothermal method. The synthetic nanowires have typical diameters of 150±30 nm and lengths of tens of micrometer. These VO 2 nanowires exhibit high crystallinity and a pure monoclinic phase, which were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, high resolution transmission electron microscopy and selected area electron diffraction. Moreover, reversible phase transition properties of VO 2 nanowires are monitored via differential scanning calorimetry, variable temperature X-ray diffraction and temperature-dependent Raman spectroscopy. The results show VO 2 nanowires obtained exhibit a reversible phase transition with an endothermic phase transition at 65.2 °C and a narrow hysteresis width of 6.5 °C. These VO 2 nanowires should be promising materials for fundamental investigations of nanoscale metal-insulator transitions.
研究领域:
材料科学
·
纳米技术
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DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-16
·
IF 36.3
Yin Chaofan,Yang Jiaming,Feng Jiangyuan,Sun Yueyue,Liu Zhengrong,Wang Junkai,Cui Jiajia,Xue Zixuan,Zhang Liang,Zhou Yucun,Zhou Jun,Xu Liangfei,Wu Kai,Li Jianqiu
La 0.3 Sr 0.6 Ti 0.1 Co 0.2 Fe 0.7 O 3− δ (LSTCF) nanofibers showed high structural reversibility.
LSTCF fibers and CoFe nanoparticles were reconstructed through a reversible phase transition process.
The LSTCF fiber electrode demonstrated excellent activity and stability for power and fuel co-generation.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 23
·4628
·
IF 4.6
Yaru Qin,Tingfei Yang,Na Chen,Jiale Li,Anqi Li,Yu Miao,Chenglong Shi,Jianmin Ma,Xue Qin
Layered transition-metal oxides are among the most promising sodium-ion battery cathodes owing to their high specific capacities and structurally tunable frameworks. However, the prototypical P2-Na0.67Ni0.33Mn0.67O2(NM) undergoes an irreversible P2 → O2 phase transition at high voltages, accompanied by severe lattice strain and capacity fade, which hinders practical deployment. Here, we propose a cooperative regulation strategy that couples Zn/Al co-doping with Na enrichment, and successfully synthesize P2-Na0.80Ni0.14Zn0.14Mn0.58Al0.14O2(NMZA-N14). The optimized NMZA-N14 delivers an initial discharge capacity of 125 mAh g−1at 0.1C and demonstrates exceptional cycling and rate performance, retaining 98.6% of its capacity after 100 cycles at 0.2C and 93.6% after 200 cycles at 1C. Kinetic analyses indicate a higher Na+diffusion coefficient and a lower charge-transfer resistance in NMZA-N14, evidencing substantially accelerated ion transport. In situ X-ray diffraction further reveals a reversible P2 → OP4 phase transition in the high-voltage regime with a unit-cell volume change of only ~2.27%, thereby avoiding the irreversible structural degradation observed in NM. This synergistic modulation markedly enhances structural stability and electrochemical kinetics, providing a viable pathway for the rational design of high-performance sodium-ion battery cathodes.
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产品关联
DOI
PubMed
高影响因子
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