Polymer Chemistry
·
2010
·Vol. 1
·期 10
·1638-1643
·
IF 0
Yin Wang,Guohua Jiang,Xinke Sun,Miaojun Ding,Hongyuan Hu,Wenxing Chen
Shell cross-linked polymeric nanoparticles were prepared through an interfacially confined copolymerization of styrene and disulfide cross-linker in a reversible addition-fragmentation chain transfer (RAFT) miniemulsion system using poly(2-(dimethylamino) ethyl methacrylate) (PDMAEMA) as stabilizer and macroinitiator. 1H NMR, FT-IR, and FE-SEM have been applied to investigate the structures and morphologies of the resultant nanoparticles. Fluorescent spectra results show that the as-prepared samples have fluorescent properties, which may be used as a fluorescent carrier for control release of guest molecules.
研究领域:
高分子化学
·
纳米医学
·
药物递送
·
生物材料
·
聚合物科学
✓ 已验证
DOI
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 6
·2302-2314
·
IF 3.5
Dou Yun-Qi,Zhang Qi,Deng Tian-Song,Cheng Zhiqun,Zhao Xiaoyu
Multimetallic plasmonic nanostructures, with appropriate morphology, elemental proportions and sizes, can be used to accelerate photocatalytic reactions. Here, we designed zigzag trimetallic nanostructures with the Au core and Pd–Pt alloy shell, whose catalytic ability was boosted by the synergistic effect of the plasmonic metal and catalytic metal. The catalytic rate of Au@PdPt nanoparticle (NP) with no light have a significant improvement, attributed to the larger contact area provided by the zigzag alloy shell. Furthermore, the enhanced catalytic activity in the presence of light is primarily due to the thermo-photo catalytic effect of plasmonic Au. The adding ratios of Pd:Pt were adjusted from 1:4 to 4:1, and we found that, when adding the Pd:Pt of 1:1, the zigzag Au@PdPt nanoparticle (NP) exhibited a superior reaction rate in the reduction methylene blue (MB) under light illumination. The rate is 8 times higher than that of Au@Pt, and the reduction conversion reached 100%. And it has a favorable plasmon enhancement factor with an appropriate shell thickness and get the balance between the catalytic performance and economic effects. This structure driven by capability-oriented design principles and holds the potential for applications in the field of catalysis. Graphical abstract
研究领域:
纳米技术
·
催化
·
材料科学
·
等离激元学
·
化学工程
✓ 已验证
DOI
高影响因子
KINETICS AND CATALYSIS
·
2013
·Vol. 54
·期 6
·716-723
·
IF 0.543
Zeng Minfeng,Sun Xudong,Qi Chenze,Zhang Xian-Man
A novel and environmentally friendly heterogeneous catalyst has been prepared through the wet impregnation of copper(I) species onto the highly porous chitosan microspheres (CuI/PCMS). This novel CuI/PCMS heterogeneous catalyst with no additional ligands is much better than CuI homogeneous catalysts when applied in Heck reactions. Moreover, the reaction conditions are much milder than those for the similar copper catalysts mediated cross-coupling reactions reported in the literature. PCMS has been demonstrated not only the excellent solid support, but also have many unique functional groups to chelate the copper (I) species to enhance its catalytic activity.
研究领域:
催化化学
·
有机合成
·
材料化学
·
环境友好化学
·
功能高分子材料
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 7
·1804974
·
IF 10.856
Na Li,Pingping Wei,Linan Yu,Junyi Ji,Jiupeng Zhao,Chuanbo Gao,Yao Li,Yadong Yin
The dynamic optical switch of plasmonic nanostructures is highly desirable due to its promising applications in many smart optical devices. To address the challenges in the reversibility and transmittance contrast of the plasmonic electrochromic devices, here, a strategy is reported to fabricate color switchable electrochromic films through electro-responsive dissolution and deposition of Ag on predefined hollow shells of Au/Ag alloy. Using the hollow Au/Ag alloy nanostructures as stable seeds for site-specific deposition of Ag, elimination of the random self-nucleation events is enabled and optimal reversibility in color switching is allowed. The hollow structure further enables excellent transmittance contrast between the bleached and colored states. With its additional advantages such as the convenience for preparation, high sensitivity, and field-tunable optical property, it is believed that this new electrochromic film represents a unique platform for designing novel smart optical devices.
研究领域:
材料科学
·
纳米科技
·
光学工程
·
功能材料
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2014
·Vol. 2
·期 34
·13859-13867
·
IF 0
Chengxin Peng,Huixin Chen,Qiongyu Li,Weiwei Cai,Qin Yao,Qingsheng Wu,Jinhu Yang,Yong Yang
The silicon material is the most promising candidate for developing new-generation lithium-ion batteries with high energy and power output. However, there remains a significant challenge due to poor electrical conductivity and pulverization of the silicon based anode during cycles. Aiming to solve these problems, in this work we fabricate a novel 3D composite architecture made of a Si@SiOx core–shell nanowire array grown on a 3D graphitic foam (Si CNW–3D GF) substrate by a well-designed multiple-step approach. The prepared Si CNW–3D GF composite shows the integrated advantages for high-performance lithium ion batteries, including its light weight, open macroporosity, high conductivity, high Si NW loading, excellent flexibility as well as SiOx buffer layers. As a result, the Si CNW–3D GF composite exhibits excellent performance such as high reversible lithium storage capacity (3603 mA h g−1 at a current density of 840 mA g−1), excellent cycling performance (up to 100 cycles) and superior rate capability (2299 mA h g−1 at 4200 mA g−1 and 1206 mA h g−1 at 8400 mA g−1), which is 2 times that of the Si CNW electrode where Si CNWs were grown directly on a stainless steel current collector without the presence of 3D GF.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
·
电池技术
✓ 已验证
DOI
Journal of Macromolecular Science Part B-Physics
·
2024
·
IF 1.2
Jie Jiang,Jianjun Fang,Wenjuan Liu,Meimei Guo,Zhongjia Lu,Heng Tang,Yi Lan,Zhihua Zhou
Composite porous microcarriers based on demineralized bone extracellular matrix (DBECM) and chitosan (Cs) were prepared using a combined emulsion and freeze-drying method. The effects of digestion by pepsin on the DBECM properties were investigated. The morphologies and porous structure of the DBECM/Cs porous microcarriers were observed by using a scanning electron microscope (SEM). The cytocompatibility of the DBECM/Cs porous microcarriers were studied by using cell counting kit-8 (CCK-8) and calcein acetoxymethyl ester/propidium iodide (CAM/PI). DBECM was digested into small pieces with a loose porous sponge structure and the digested DBECM showed an amorphous state. The resultant DBECM/Cs porous microcarriers showed a spherical shape and an interconnective porous structure. The CCK-8 and CAM/PI analyses indicated that the DBECM/Cs porous microcarriers were non-cytotoxic and showed good biocompatibility, providing a more favorable growth environment for cells.
研究领域:
生物医学工程
·
材料科学
·
组织工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 3
·2037-2048
·
IF 2.993
Wang Kelai,Liang Zheng,Li Jingling,Xu Xueqing,Cheng Xiaoling,Jin Hu,Xu Dehua,Xu Gang
Photoluminescent CuIn(Se x S 1 − x ) 2 (CISeS) nanocrystals (NCs) have been synthesized utilizing copper iodide (CuI) and indium acetate (In(Ac) 3 ) as metal cation precursors, Se powder and n -dodecanethiol (DDT) as selenide and sulfur source, combined with oleylamine and n -dodecanethiol as coordinate ligands at a moderate reaction temperature of 200 °C. The obtained CISeS NCs consisted of a gradient composition that the content of selenide increased from the nuclei to the surface. With the growth of NCs, they exhibited a tunable photoluminescent emission ranging from 722 to 830 nm which was size- and composition-dependent. The photoluminescent quantum yield of the NCs could be further enhanced from 1.2 to 40.7% after ZnS coating due to the formation of ZnCuIn(Se x S 1 − x ) 2 /ZnS (ZnCISeS/ZnS) core–shell structures with the alloyed core. The photoluminescence emission mechanisms of CISeS NCs indicated that the gradient composition structure of CISeS led to a gradient energy level of its conduction band (CB)/valence band (VB), resulting in the charge transfer from the nuclei to the surface through the quantized CB/VB. This transfer process has quenched fluorescence emission arising from the quantized CB/VB and defect states located in the nuclei, such as irradiation relaxation between quantized CB and \( V_{\text{Cu}}^{ \prime } \) . This mechanism could illuminate why the indium-rich CISeS NCs did not exhibit better photoluminescence properties.
研究领域:
材料化学
·
纳米科学
·
半导体光学
·
光电子学
·
胶体化学
·
能源材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2015
·
IF 4.321
Peng Li,Jingyan Liu,Yuwei Wang,Yang Liu,Xiuna Wang,Kyung-Wan Nam,Yong-Mook Kang,Mingbo Wu,Jieshan Qiu
Petroleum asphalt based ultrathin hollow carbon shell (PACS) was prepared via a facile template-assisted method. As the anode material of lithium-ion batteries, PACS exhibits high reversible capacity, excellent cycling stability, and superior rate performance. A high reversible capacity of 334 mA h g −1 and 90% kept of the theoretical capacity can still be maintained in PACS at a current density of 1 A g −1 even after 1000 cycles, which is ascribed to the unique hollow structure, ultrathin porous shells (4.7 nm), the doped nitrogen atoms, and high level of disorder degree. Meanwhile, the present study paves a milestone for the high-valued utilization of petroleum asphalt and other kinds of heavy oil.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
碳材料
·
电池技术
✓ 已验证
DOI
高影响因子
ACS Nano
·
2019
·
IF 13.903
Fei Wang,Bo Wang,Tingting Ruan,Tiantian Gao,Rensheng Song,Fan Jin,Yu Zhou,Dianlong Wang,Huakun Liu,Shixue Dou
Silicon (Si), a promising candidate for next-generation lithium-ion battery anodes, is still hindered by its volume change issue for (de)lithiation, thus resulting in tremendous capacity fading. Designing carbon-modified Si materials with a void-preserving structure (Si@void@C) can effectively solve this issue. The preparation of Si@void@C, however, usually depended on template-based routes or chemical vapor deposition, which involve toxic reagents, tedious operation processes, and harsh conditions. Here, a facile templateless approach for preparing Si@void@C materials is reported through controlling the growth kinetics of resin, without the use of toxic hydrofluoric acid or harsh conditions. This approach allows great flexibility in tuning the crucial parameters of Si@void@C, such as the carbon shell thickness, the reserved void size, and the number of Si cores coated by a carbon shell. The optimized Si@void@C delivers a large specific capacity (1993.2 mAh g–1 at 0.1 A g–1), excellent rate performance (799.4 mAh g–1 at 10.0 A g–1), and long cycle life (73.5% capacity retention after 1000 cycles at 2.0 A g–1). In addition, a full cell fabricated with a Si@void@C anode and commercial LiFePO4 cathode also displays an impressive cycling performance.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Zhuoya Ren,Shuai Liu,Jianqiang Chen,Yang Yu,Qianqian Shang,Sandile Fakudze,Chengguo Liu,Peiguo Zhou,Qiulu Chu
As the world transitions towards an electric vehicle-driven future, demand for energy storage materials has continued to grow. Silicon-carbon composites are considered one of the most promising anode materials for lithium-ion batteries owing to their superior electrochemical performance. However, their commercialization is seriously limited due to the use of chemical reagents as carbon source, unstable coating structures and the complexity of the synthesis process. Herein, a facile one-step carbonization method at 800 °C was used to prepare Si@SiO X @C-800 composite by using rice husks, 1‑butyl‑3-methylimidazolium acetate (BMIMAcO) and silicon nanoparticles (Si-NPs). When the optimized Si@SiOx@C-800 was applied to the anode of lithium-ion batteries, it exhibited prominent reversible capacity (694 mAh g −1 at 0.1 A g −1 ), with remarkable rate performance (220 mAh g −1 at 2 A g −1 ), and excellent cyclic stability (460 mAh g −1 with a capacity retention of 105.7% at 1 A g −1 after 1000 cycles). The coupling of interfaces by Si-N bonds led to the formation of a double-layered structure which enhanced Li + diffusion coefficients and electrochemical kinetics, while tremendously limiting the volume variation of Si nanoparticles (Si NPs). The double-shell-structured Si@SiO X @C-800 composite material which was facilely synthesized using an eco-friendly approach presented superior electrochemical performance.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
可持续材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 11
·6342-6350
·
IF 3.119
Meili Qi,Dongliang Chao,Weifeng Sun,Jinghua Yin,Minghua Chen
The control of structure and morphology in an electrode design for the development of large-power lithium ion batteries is crucial to create efficient transport pathways for ions and electrons. Herein, we report a powerful combinational strategy to build omnibearing conductive networks composed of titanium niobium oxide nanorods and carbon nanofibers (TNO/CNFs) via an electrostatic spinning method and a hydrothermal method into free-standing arrays with a three-dimensional heterostructure core/shell structure. TNO/CNF electrode exhibits significantly superior electrochemical performance and high-rate capability (241 mA h g−1 at 10C, and 208 mA h g−1 at 20C). The capacity of the TNO/CNF electrode is 257 mA h g−1 after 2000 cycles at 20C, which is much higher than that of the TNO electrode. In particular, the TNO/CNF electrode delivers a reversible capacity of 153.6 mA h g−1 with a capacity retention of 95% after 5000 cycles at ultrahigh current density. Superior electrochemical performances of the TNO/CNF electrode are attributed to the unique composite structure.
研究领域:
材料科学
·
电化学
·
纳米能源
·
储能技术
·
无机功能材料
✓ 已验证
DOI
高影响因子
ANALYST
·
2019
·Vol. 144
·期 16
·4925-4934
·
IF 4.019
Palanisamy Kannan,Fangshuai Chen,Huasheng Jiang,Hui Wang,Rongfang Wang,Palaniappan Subramanian,Shan Ji
Designing highly active electrode is important for the fabrication of electrochemical sensing platforms, and core–shell nanostructures with large specific surface areas and ease of accessibility are effective probes for the detection of biomolecules. In this work, we report the development of hierarchical core–shell Ni3S2/NiMoO4 nanowires on a nickel foam substrate (Ni–Ni3S2/NiMoO4) as a non-noble metal catalyst electrode for the electrochemical oxidation of glucose in alkaline electrolyte. As an electrochemical sensor for glucose detection, the fabricated hierarchical Ni–Ni3S2/NiMoO4 core–shell nanowires display an enhanced catalytic response, a fast response time of 1 s with a limit of detection (LOD) of 0.055 μM (S/N = 3), and a higher sensitivity of 10.49 μA μM−1 cm−2. Unlike Ni3S2 or NiMoO4 electrodes, the observed superior catalytic activity towards glucose is mainly due to the promotional effect of NiMoO4 nanosheets on the Ni3S2 nanowires, which can increase the large active surface area and generate numerous active sites within and on the surface walls of the nanowire structures. The developed Ni–Ni3S2/NiMoO4 nanowire electrode can selectively detect glucose in the presence of other carbohydrates, such as fructose, sucrose, lactose, maltose, galactose, mannose, and xylose, indicating potential anti-interference properties. The Ni–Ni3S2/NiMoO4 nanowire electrode is highly stable for reuse and its practical application is demonstrated using real blood serum samples. These results demonstrate that hierarchical core–shell Ni3S2/NiMoO4 nanowires show potential for application in the development of low-cost applied glucose sensors.
研究领域:
生物医学工程
·
电化学传感
·
纳米材料科学
·
临床检验学
·
糖尿病监测
·
转化医学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）