CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2024
·
IF 3.7
Yumiao Lu,Weilu Ding,Kun Li,Yanlei Wang,Bobo Cao,Ruirui He,Hongyan He
Ionic liquids (ILs) are an emerging class of media of fundamental importance for chemical engineering, especially due to their interaction with solid surfaces. Here, we explore the growth phenomenon of surface-confined ILs and reveal a peculiar structural transition behavior from order to disorder above a threshold thickness. This behavior can be explained by the variation of interfacial forces with increasing distance from the solid surface. Direct structural observation of different ILs highlights the influence of the ionic structure on the growth process. Notably, the length of the alkyl chain in the cation is found to be a determining factor for the ordering trend. Also, the thermal stability of surface-confined ILs is investigated in depth by controlling annealing treatments. It is found that the ordered monolayer ILs exhibit high robustness against high temperatures. Our findings provide new perspectives on the properties of surface-confined ILs and open up potential avenues for manipulating the structures of nanometer-thick IL films for various applications.
研究领域:
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Shenyang Xu,Zhihai Gao,Hao Chen,Liang Chang,Nian Zhang,Dong Zhou,Tianyi Li,Tony Wang,Cong Lin,Haoyu Xue,Qinghao Lai,Weiyuan Huang,Luyi Yang,Jiajie Liu,Tongchao Liu,Lunhua He,Mingjian Zhang,Zhengyan Lun,Feng Pan
Li-rich Mn-based layered (LMR) cathodes with anionic redox chemistry show great potential for next-generation sustainable Li-ion battery (LIB) applications due to the low cost and high energy density. However, the asynchronous structural evolutions with cycling in the heterogeneous composite structure of LMR lead to serious lattice strain and thus fast electrochemical decay, which hinders the commercialization of LMR cathodes. Here, an order–disorder coherent LMR cathode is demonstrated that exhibits a higher average voltage (by 0.25 V), negligible voltage decay (97.6% voltage retention after 100 cycles at 100 mA g −1 ), and enhanced cycling stability (98% capacity retention after 200 cycles at 100 mA g −1 ) compared to its layered oxide counterparts. It is proposed that this order–disorder coherent structure design can promote a more synchronous and homogeneous structure evolution during charge and discharge, thus minimizing lattice strain, which significantly prevents layer collapse and collective degradation at high voltage, improving the electrochemical stability. The study displays the feasibility of optimizing the performance of Li-rich cathode materials through a dedicated order–disorder structure control for sustainable energy storage.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of the American Chemical Society
·
2023
·
IF 15
Jia-Hang Wu,Chun-Li Hu,Ting-Kun Jiang,Jiang-Gao Mao,Fang Kong
An unusual O/F ordered d0 transition metal fluoroantimonite, namely, K2SbMoO2F7, has been created by the cationic size effect of alkali metals. It features the largest birefringence of 0.220@550 nm among inorganic antimonites with a halogen element, which is an order of magnitude larger than the disordered A2SbMoO2F7 (A = Rb, Cs). These three new compounds exhibit two different structures, although all of the structures were made of [SbMoO2F7]2– chains formed by SbF5 square pyramids and MoO2F4 octahedrons. A transparent single crystal of K2SbMoO2F7 with dimensions of 7.0 × 5.0 × 1.0 mm3 has been successfully grown by the aqueous solution volatilization method. The UV–vis–MIR transmission spectrum showed that K2SbMoO2F7 can display excellent transmittance in the range of 0.5–5.0 μm and 6.0–9.8 μm, indicating its application potential as a birefringent material in the mid infrared band. This work offers a fresh approach to the design and synthesis of mid infrared birefringent materials.
研究领域:
材料科学
·
晶体学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 20
·1900234
·
IF 15.621
Weinan Yuan,Guangda Niu,Yeming Xian,Haodi Wu,Huamin Wang,Hang Yin,Peng Liu,Wenzhe Li,Jiandong Fan
The double perovskite Cs 2 AgBiBr 6 single crystal holds great potential for detecting applications because of its low minimum detectable dose rate and toxic-free merit. Nevertheless, the disordered arrangement of Ag + /Bi 3+ usually gives rise to unexpected structural distortion and thereafter heavily influences the photoelectric properties of the Cs 2 AgBiBr 6 single crystal. Herein, phenylethylamine bromide is demonstrated to be capable of in situ regulation of the order–disorder phase transition in the Cs 2 AgBiBr 6 single crystal. The improved ordering extent of alternatively arranged [AgX 6 ] 5− and [BiX 6 ] 3− octahedra is theoretically and experimentally proven to decrease the defect density and suppress self-trapped exciton formation, and thereby tune the band gap and enhance the carrier mobility, which consequently promotes its application in an X-ray detector. The performance of a corresponding detector based on PEA-Cs 2 AgBiBr 6 single crystal displays superior performances, e.g., longer carrier drift distance, higher photoconductive gain, and faster current response (13 vs 3190 µs). Prominently, the as-fabricated PEA-Cs 2 AgBiBr 6 single-crystal X-ray detector has an extremely high sensitivity with a value of 288.8 µC Gy air −1 cm −2 under a bias of 50 V (22.7 V mm −1 ), which largely outperforms those of their counterparts with lower ordering structure.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xiaolei Ren,Yujia Wang,Qing Ke,Ran Wang,Xingxing Gu
Iron difluoride (FeF 2 ) is one of the promising cathodes to achieve high energy-density lithium-ion batteries (LIBs). However, the sluggish ion transportation kinetics in the FeF 2 bulk phase may cause large voltage hysteresis and lower cell efficiency, which hinders its commercial adoption. Introducing a disordered phase into the ordered bulk FeF 2 is proposed to promote ion transportation and increase ion diffusion channels. Here, varying ratios of the disordered phase are incorporated into the ordered matrix of FeF 2 by adjusting the annealed temperatures. The ion transportation is improved due to the optimal ratio of the disordered to ordered (RDO) phase. Among four electrodes, the RDO25% electrode demonstrates the least electrochemical polarization of 1.22 V and the lowest voltage hysteresis of about 1.0 V, in addition to delivering a discharge capacity of 128 mAh g −1 after 100 cycles in the carbonate-type electrolyte. The introduction of the disordered phase enables FeF 2 to exhibit a distinct intercalation and conversion dual-mechanism cathode. Additionally, appropriate ratios of the disordered-ordered phase can mitigate nanoparticle agglomeration, establish a conformal cathode electrolyte interface (CEI), reduce interfacial resistance, and thereby enhance ion transport.
研究领域:
材料科学
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电化学
·
能源存储
·
纳米材料
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固态化学
·
电池技术
✓ 已验证
DOI
高影响因子
Biomaterials Advances
·
2022
·
IF 0
Pengpeng Li,Lina Cao,Feng Sang,Bingxu Zhang,Zhizhen Meng,Lingling Pan,Jiahui Hao,Xiao Yang,Zhaipu Ma,Changcan Shi
It is still a challenge to develop a sponge that can efficiently control noncompressible bleeding to meet the emergency treatment and clinical demand. Herein, we combined the 3D printing sacrificial template method and freeze-drying technology to prepare polyvinyl alcohol/sodium alginate (PVA/SA) composite sponges with ordered microchannels and disordered porous structure. Compared with conventional sponges, the prepared sponge showed ultra-rapid water/blood absorption capacity and satisfactory mechanical properties. Furthermore, when the sponge was stuffed into a noncompressible wound and contacted with blood, it could accurately guide and quickly absorb a large amount of blood through the microchannels. Moreover, the platelets, red blood cells and coagulation factors would be enriched in the microchannels and microporous structure. In the SD rat liver noncompressible hemorrhage and femoral artery puncture injury model, PVA-SA composite sponge with 3D ordered/disordered porous structure showed enhanced hemostatic performance compared with commercial MPVA sponges. Depend on the special ordered/disordered porous structure, PVA-SA composite sponge could accelerate the blood convergence and promote coagulation. This design of special porous structure opened up a new avenue to develop hemostatic sponges for rapidly controlling noncompressible hemorrhage.
研究领域:
材料科学
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生物医学工程
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止血研究
✓ 已验证
DOI
PubMed
RSC Advances
·
2017
·Vol. 7
·期 82
·52024-52029
·
IF 3.108
Xiao-Fen Sun,Zhongxia Wang,Wei-Qiang Liao,Peng-Fei Li,Jixing Gao,Yi-Yang Huang,Hai-Peng Chen,Heng-Yun Ye,Yi Zhang
In this paper, three new hybrid phase transition compounds, [Hmpy]CdBr3 (1, Hmpy = N-methylpyrrolidinuium cation), [Hmpy]2CdBr4 (2) and [Hmpy]3CdBr3·CdBr4 (3), were synthetized by means of regulating the ratio of reactants. Systematic characterizations consisting of variable temperature X-ray single crystal diffraction, differential scanning calorimetry (DSC) and dielectric measurements reveal that 1 with infinite one-dimensional (1D) [CdBr3]n− chains undergoes a phase transition around 278 K; 2 with isolated [CdBr4]2− tetrahedrons exhibits a high-temperature phase transition close to 367 K, accompanied by prominent switchable dielectric behavior. Interestingly, 1D [CdBr3]n− chains and isolated [CdBr4]2− tetrahedrons both exist in 3, associated with a phase transition at 320 K. The phase transitions in the three compounds are originated from the order-disorder transitions of the Hmpy cation. It is expected that our finding would promote the development of hybrid dielectric transition materials with adjustable properties.
研究领域:
材料化学
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凝聚态物理
·
晶体工程
·
功能材料
·
介电材料
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2025
·
IF 4.6
Yonggang Chen,Ruihao Xue,Ze Gong,Hongyuan Jiang
Controlling the spatial arrangement of nanodots is pivotal for functional nanomaterials and biointerfaces, and the spontaneous self-assembly of block copolymer micelles has been widely used to fabricate ordered nanostructures. However, achieving tunable disorder remains a fundamental challenge. Here, we demonstrate how successive spin coating dynamically modulates both density and disorder in micellar arrays, revealing an unexpected non-monotonic evolution of structural order. By using the Voronoi tessellation and Alpha shapes filtering algorithm, we found that initial coatings produce hexagonal order (interparticle distance: 126 nm, σd/d̅ = 0.12) and intermediate cycles induce maximal disorder (interparticle distance: 95 nm, σd/d̅ = 0.26), while further deposition partially restores order driven by steric hindrance (interparticle distance: 73 nm, σd/d̅ = 0.20). Our successive spin-coating approach achieves tunable disorder equivalent to conventional polymer-blending methods but without additives, offering a versatile strategy for engineering nanoscale surface patterns with potential applications for biomaterials and optical device design.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Shan-Shan Hei,Yu Xu,Xue-Wei Pan,Lu Zhai,Zheng-Fang Tian,Xiao-Ming Ren
Multifunctional response materials exhibit potential applications in sensors and optoelectronic devices; however, successfully targeting such materials remains a significant challenge. In this study, we synthesized two zero-dimensional hybrids: (C6H16N)2MnBr1.53Cl2.47 (1, C6H16N = trimethyl propyl ammonium) and (C7H18N)2MnBr1.40Cl2.60 (2, C7H18N = trimethyl butyl ammonium). These compounds were formed by combining pseudoglobular organic ammonium cations with the highly emissive [MnX4]2– (X = Br or Cl) anion. Both compounds undergo order–disorder structural phase transitions, exhibiting thermal hysteresis: 1 at 331 K (heating)/326 K (cooling) and 2 at 383 K/373 K and 445 K/428 K (heating/cooling), respectively. These transitions result in a switchable dielectric behavior. At ambient conditions, both compounds emit the bright characteristic luminescence of the [MnX4]2– anion, with photoluminescence quantum yields (PLQY) of 88.71% for 1 and 94.59% for 2. However, they exhibit thermal quenching at elevated temperatures (∼420 K for 1 and ∼460 K for 2). Near their phase transition temperatures, both compounds also show switchable luminescent properties. Collectively, 1 and 2 represent rare examples of materials exhibiting dual-switchable dielectric and luminescence responses.
研究领域:
材料科学
·
无机化学
·
物理化学
·
光电子学
·
固态化学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Wenzhuo Chen,Jian Yang,Jiazheng Hao,Feiran Shen,Lunhua He,Xia Deng,Jiasheng Lv,Jing Fang,Laijun Liu,Jungu Xu
The undoped K2ZnV2O7 material has a melilite-like structure, with the K+ ions distributed orderly on two distinguishable crystallographic sites, which is the main difference with the case in a typical A2B3O7 melilite material where the A site cations occupy only one crystallographic position. Herein, we report that substitution of Ga for Zn in K2ZnV2O7 would induce the K+ ions’ order-to-disorder transition and transform the K2ZnV2O7 from the melilite-like structure to a typical melilite phase, coupled with significantly enhanced oxide ion conductivity, e.g. ∼1.01 × 10–1 S/cm at 600 °C for the K2Zn0.7Ga0.3V2O7.15 sample, which is about 2 orders of magnitude higher than the parent material. The powder neutron diffraction data analysis results revealed two sites for the interstitial oxygen defects that are introduced by the donor-doping. The introduction of interstitial oxygen into the K layer strongly correlated with the K ions’ order-to-disorder transition, while the interstitial oxygens within the 5-fold (Zn/Ga/V)O4 tetrahedral rings are responsible for the enhanced oxide ion conductivity. These findings provided a comprehensive understanding of the melilite-like and typical melilite materials for the mechanism of the stabilization and migration of interstitial oxygen defects.
研究领域:
材料科学
·
固体化学
·
电化学
·
晶体学
·
无机化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Ning Sun,Yang Qin,Gongjin Xu,Yalei Fan,Bowen Zhang,Yu-Cheng Huang,Ying-Rui Lu,Xiangjiang Dong,Lei Lian,Zhichuan Zheng,Ruyue Wang,Qingyu Kong,Zhiwei Hu,Linjuan Zhang,Ming Lei,Kai Huang,Runze Yu
Atomic-scale modulation of crystalline ordering in heterogeneous catalysts offers a critical pathway to enhance reaction kinetics, yet fundamental understanding of how their dynamic structural evolution governs active-site stability remains elusive. Here, we decode these effects by precisely engineering crystallographic gradients from ordered to disordered states, within octahedral building blocks (isolated octahedra [MO 6 ] or dimer [M 2 O 9 ]) of perovskite oxides Ba 3 M x Ru 2-x O 9 (M = Fe, Co). This atomic-level control induces systematic shifts in d / p -band centers and optimizes charge distribution architectures within active regions. Crucially, the highly disordered Ba 3 FeRu 2 O 9 achieves exceptional stability via a self-sacrificial reduction of iron, which generates a built-in electric field (BEF). The BEF promotes optimal adsorption/desorption kinetics of OH*/H* intermediates for the hydrogen evolution reaction (HER). Consequently, Ba 3 FeRu 2 O 9 delivers benchmark alkaline HER performance, achieving an overpotential of just 24 mV at 10 mA cm −2 and demonstrating operational stability exceeding 600 h. Our results reveal that structural reorganization, enabled by atomic-level ordering modulation, is critical for establishing dynamic structure-performance frameworks to guide advanced catalyst design.
研究领域:
材料化学
·
电化学
·
催化化学
·
固态化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Peng Li,Zhongrui Gai,Jinrui Zhang,Qiong Rao,Yuanhui Shen,Sanli Tang,Ying Pan,Hongguang Jin
As a highly efficient and promising methane utilization technology, chemical looping dry reforming of methane (CLDRM) offers an environmentally friendly method for syngas production. The performance of the oxygen carriers (OCs) is determined by multiple properties such as thermal stability, oxygen-ion conductivity, oxygen capacity, and vacancies. In this study, a series of OCs were synthesized and characterized by adjusting the La3+/Ce3+ ratio at the A site of LaxCe2–xZr2O7−δ. Experiments were conducted in a fixed-bed reactor to study the thermal properties of the OCs. Results showed that the LaCeZr2O7−δ pyrochlore with a La3+/Ce3+ ratio of 1:1 exhibited the highest H2 production (1.01 mmol g–1), CO selectivity (58.4%), and optimal H2/CO ratio (1.97). As the La3+/Ce3+ ratio decreases, a phase transformation was observed from pyrochlore (La2Zr2O7−δ) to the defective fluorite (Ce2Zr2O7−δ), as characterized by XRD, BET, Raman, TEM/HRTEM, STEM-EDS, XPS, and H2-TPR/O2-TPO. The microstructural evolution driven by the cation antisite, anion Frenkel disorder, and defect clustering correlates well with the performance of the pyrochlore-fluorite OCs, demonstrating an optimal balance between the thermal stability and high selectivity of the pyrochlore and the oxygen capacity of the defective fluorite. This result can be viewed as an alternative method for enhancing the clean hydrogen production in chemical looping dry reforming application.
✓ 已验证
产品关联
DOI
高影响因子
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