MATERIALS & DESIGN
·
2017
·
IF 4.364
Puhong Wen,Lili Ai,Taotao Liu,Dengwei Hu,Fangyi Yao
The regular orthorhombic Nb 2 O 5 (O-Nb 2 O 5 ) rectangle nanosheets dominantly exposed (010) facet are synthesized by a hydrothermal topological reaction with a precursor of K 4 Nb 6 O 17 ·4.5H 2 O (KNbO). The structure and morphology of the samples obtained at different temperatures and pH values of reacting solution are investigated. The results suggest that there are two topological reactions in this process. One is the acid-exchanging reaction transforming into H 4 Nb 6 O 17 ·3H 2 O (HNbO) nanosheets from KNbO rectangle nanosheets , and the other is dehydration reaction transforming into O-Nb 2 O 5 rectangle nanosheets from HNbO nanosheets. And the {010} facets of O-Nb 2 O 5 crystal are transformed from the {010} facets of HNbO crystal in the ingenious topological reaction. The photoelectric performance of the obtained O-Nb 2 O 5 nanosheets is evaluated by decomposing water to H 2 under 370 nm UV light illumination and measuring the accompanying photocurrent . The photocurrent density is 680 nA·cm − 2 generated by splitting water with O-Nb 2 O 5 nanosheets as photocatalyst , and it is 4.3 times of the contrast sample. The result indicates that the (010) facet of O-Nb 2 O 5 is one of the highest photocatalytic active surfaces and shows high photoelectric conversion efficiency. Thus, the O-Nb 2 O 5 nanosheets dominantly exposed (010) facet have potential applications in photocatalyst and photoelectric nanodevices .
研究领域:
材料科学
·
光催化
·
纳米材料
·
无机化学
·
能源材料
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Jimin Li,Hongjie Wang,Tian Liu,Usama Shakeel,Jiaqi Guo,Wenyuan Zhu,Igor S. Makarov,Mohammad Rizwan Khan,Huining Xiao,Junlong Song
Cellulose nanocrystals (CNCs) have garnered attention for their renewable and reactive nature, yet CNC allomorph II (CNC-II) remains underexplored compared to the extensively studied CNC-I. This study bridges this gap by introducing a two-step carboxylamine condensation strategy to conjugate poly(ethylene glycol) (PEG) onto CNC-II via ethylenediamine, leveraging the high topochemical reactivity of CNC-II. Utilizing bicarboxylate-capped PEG as a probe, quartz crystal microbalance with energy dissipation (QCM-D) assays revealed a significant reactivity increase of 16.99 % in PEG grafting for CNC-II compared to CNC-I. Furthermore, a temperature-responsive CNC-II conjugate (CF4-II) was synthesized by grafting the thermosensitive polymer F124 (a block copolymer composed of PEO and PPO segments), demonstrating its utility in stabilizing Pickering emulsions for the temperature-controlled release of ibuprofen. The results of the in vitro release of ibuprofen encapsulated in CF4-II emulsions show that the release rate is more than quadrupled as the temperature increased from 37 °C to 40 °C, indicating that it is a promising smart drug carrier for fever management. These findings not only underscore the potential of CNC-II as a superior substrate for topological chemical reactions but also pave the way for the development of advanced materials and nanodevices with enhanced functionality and responsiveness.
研究领域:
纳米技术
·
高分子科学
·
药剂学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 19
·2312415
·
IF 18.5
Chuanzhong Lai,Keyi Chen,Meng Lei,Jiulin Hu,Shuangqiang Chen,Chilin Li
Conversion-reaction metal fluoride cathodes have the advantages of low cost, environmental friendliness, and high energy density. However, their tailored synthesis and structure design under safe, facile, and scalable conditions have always been a puzzle, which limits the popularization of conversion-type cathodes in lithium metal batteries. To address these challenges, here an iron fluoride heterostructure with FeF 2 and FeF 3 binary phases is proposed and prepared by deep eutectic solvent method under the assistance of cobalt cation as an oxidization promoter. The compact heterogeneous contact between tetragonal FeF 2 and hexagonal tungsten bronze FeF 3 phases enables the promotion and stabilization of interface charge transfer and topotactic conversion reaction. The narrower band gap of FeF 2 , higher theoretical capacity and thermodynamic potential of FeF 3 synergistically contribute to the balance between cycling reversibility and capacity. The heterostructure cathode with an optimized molar ratio of FeF 2 /FeF 3 can realize a highly reversible capacity of ≈520 mAh g −1 in the first tens of cycles and 305 mAh g −1 after 200 cycles. The typical two-stage reaction plateaus are well preserved even under the high current density of 1000 mA g −1 . The green synthesis strategy and heterostructure fluoride design open a new horizon for the development of high-energy-density metal fluoride batteries.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jiamin Shi,Gaozhan Liu,Wei Weng,Liangting Cai,Qiang Zhang,Jinghua Wu,Xiaoxiong Xu,Xiayin Yao
Poor solid–solid contact between an electrode and solid electrolyte is a great challenge for all-solid-state lithium batteries (ASSLBs) which results in limited ion transport and eventually leads to rapid capacity fading. Two-dimensional (2D) materials have incomparable advantage in the construction of the desired interface because of their flat surface and large specific surface area. In order to realize intimate interfacial contact and superior ion transport, monodisperse 2D Co3S4 hexagonal platelets as cathodes for all ASSLBs are synthesized through a series of topological reactions followed with in situ coating of tiny Li7P3S11 using a liquid-phase method. The unique 2D hexagonal platelets are favorable for in situ solid electrolyte coating. Moreover, the well-designed interfacial structure can make the electrode materials contact with solid electrolytes more closely, contributing to a remarkable improvement on electrochemical performance. ASSLBs employing the Co3S4@Li7P3S11 composite platelets as a cathode deliver a large reversible capacity of 685.9 mA h g–1 at 0.5 A g–1 for 50 cycles. Even at a high current density of 1 A g–1, the Co3S4@Li7P3S11 composite cathode still exhibits a high capacity of 457.3 mA h g–1 after 100 cycles. This work provides a simple strategy to design the composite electrode with intimate contact and superior ion transport via morphology controlling.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）