Journal of Biomedical Nanotechnology
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2018
·Vol. 14
·期 6
·1117-1124
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IF 5.068
Hu Meixin,Qi Jianrong,Ruan Jing,Shen Guangxia
Carbon dots, as a potential substitute for semiconductor quantum dots, have drawn great interest in recent years. The preparation of fluorescent carbon dots has been made easy with many significant advances, but the complicated purifying processes, low quantum yield, and blue emission
wavelength still limit its wider application in biosensors, biomedicine, and photonic devices. Here we report a strategy to synthesis Gd-doped carbon dots (Gd-Cdots) of super-high quantum yield with a microwave assisted hydrothermal method. The Gd-Cdots, with a diameter of 47∼8 nm, can
be purified easily with conventional centrifugal techniques. Carbon microparticles (CMPs) have also been synthesized with a similar procedure. Meanwhile, we demonstrated a novel "turn-off-on" fluorescent biosensor, which has been developed for highly sensitive detection of glucose using Gd-doped
carbon dots as probes. The proposed biosensor has exhibited low-cost and non-toxic properties, with high sensitivity and good specificity. In addition, the results in real blood samples further confirmed it as a promising application in diabetes diagnosis.
研究领域:
生物传感
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医学诊断
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Jiang-Tao Liu,Yu-Chen Zheng,Xin Hou,Xue-Rong Feng,Ke Jiang,Ming Wang
The recycling of waste masks (melt-blown polypropylene nonwoven fabrics) generated during the COVID-19 outbreak has now become a social issue of high priority. Converting these waste masks into electromagnetic wave (EMW) absorbers is one of the most cost-effective and high-value-added methods. In this study, we successfully converted household masks into magnetic metal doping carbon micro-particles with columnar structure to achieve excellent microwave absorption properties through sulfuric acid modification and doping magnetic metal. Specifically, the cobalt-doped carbon columnar micro-particles have a minimum reflection loss (RL min ) of −52.8 dB at 7.0 GHz (d = 3 mm) and an effective absorption bandwidth (EAB) of 4.6 GHz (d = 1.4 mm). The nickel/carbon hybrid materials have an RL min of −26.2 dB at 8.8 GHz (d = 3 mm) and an EAB of 5.3 GHz (d = 2.4 mm). The multiple reflection or scattering of EMWs, conduction and magnetic losses, dipolar polarization, and interfacial polarization effects can be enhanced in those magnetic metal doping carbon micro-particles with columnar structure, which leads to the excellent microwave absorption performance.
研究领域:
材料科学
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环境科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2021
·Vol. 9
·期 9
·2100305
·
IF 3.631
Ying Liang,Yunhua Lu,Jianhua Zhang,Haijun Chi,Yan Dong,Guoyong Xiao
Novel porous carbon microparticles derived from self-assembled polyimides (PIs) were prepared via a facile solvothermal strategy, followed by thermally rearranged treatment and pyrolysis process. Without additional activation, the carbon microparticles exhibited large specific surface areas and abundant oxygen and nitrogen contents. Herein, the PIs microparticles derived from 3,3′,4,4′-benzophenonetetracarboxylic dianhydride and 3,3′-diamino-4,4′-dihydroxybiphenyl, are self-assembled by nanoscale layers. Due to thermally rearranged process, the as-prepared carbon microparticles contain a large number of micropores and mesopores, resulting in large specific surface area of 1070.7 m 2 g −1 . Due to the rich oxygen of 10.96%, HPI-90-2-900 offers higher specific capacitance of 263.7 F g −1 when the current density is 0.5 A g −1 . In addition, the specific capacitances are maintained by 67.5% when the current density is enhanced to 10 A g −1 . The long-term stability test shows that the retention rate of specific capacitance is close to 100% after 10 000 cycles of charge and discharge when the current density was 1 A g −1 , indicating a good cycle life. Moreover, a light-emitting diode is successfully lighted up by the coin cells. Therefore, a facile strategy to improve the electrochemical performance of carbon microparticles to meet the requirements of energy storage and conversion is provided.
研究领域:
材料科学
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能源存储与转换
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2013
·
IF 3.458
Yanzhuo Zhang,Zhizhuang Zhi,Xue Li,Jian Gao,Yaling Song
The main objective of this study was to develop carboxylated ordered mesoporous carbon microparticles (c-MCMs) loaded with a poorly water-soluble drug, intended to be orally administered, able to enhance the drug loading capacity and improve the oral bioavailability. A model drug, carvedilol (CAR), was loaded onto c-MCMs via a procedure involving a combination of adsorption equilibrium and solvent evaporation. The physicochemical properties of the drug-loaded composites were systematically studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption, powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC) and HPLC. It was found that c-MCM has a high drug loading level up to 41.6%, and higher than that of the mesoporous silica template. Incorporation of CAR in both drug carriers enhanced the solubility and dissolution rate of the drug, compared to the pure crystalline drug. After loading CAR into c-MCMs, its oral bioavailability was compared with the marketed product in dogs. The results showed that the bioavailability of CAR was improved 179.3% compared with that of the commercial product when c-MCM was used as the drug carrier. We believe that the present study will help in the design of oral drug delivery systems for enhanced oral bioavailability of poorly water-soluble drugs.
研究领域:
药剂学
·
药物递送系统
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产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2022
·Vol. 9
·期 25
·2202394
·
IF 17.521
Mian Wang,Xi Mao,Jingye Liu,Bite Deng,Shuai Deng,Shaohong Jin,Wang Li,Jiang Gong,Renhua Deng,Jintao Zhu
Mesoporous carbon microparticles (MCMPs) with anisotropic shapes and ordered structures are attractive materials that remain challenging to access. In this study, a facile yet versatile route is developed to prepare anisotropic MCMPs by combining neutral interface-guided 3D confined self-assembly (3D-CSA) of block copolymer (BCP) with a self-templated direct carbonization strategy. This route enables pre-engineering BCP into microparticles with oblate shape and hexagonal packing cylindrical mesostructures, followed by selective crosslinking and decorating of their continuous phase with functional species (such as platinum nanoparticles, Pt NPs) via in situ growth. To realize uniform in situ growth, a “guest exchange” strategy is proposed to make room for functional species and a pre-crosslinking strategy is developed to preserve the structural stability of preformed BCP microparticles during infiltration. Finally, Pt NP-loaded MCMPs are derived from the continuous phase of BCP microparticles through selective self-templated direct carbonization without using any external carbon source. This study introduces an effective concept to obtain functional species-loaded and N -doped MCMPs with oblate shape and almost hexagonal structure ( p6mm ), which would find important applications in fuel cells, separation, and heterogeneous catalysis.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Dan Lv,Lili Yang,Runfeng Song,Mingtao Ding,Jie Liu,Wenbin Hu,Cheng Zhong
Silicon (Si)-based anode materials have been regarded as a viable alternative to replace traditional graphite owing to its high theoretical capacity. Nevertheless, the industrial production of Si nanoparticles (Si NPs) is hindered by low tap density and inferior areal capacity. Here, the hard carbon supported Si NPs are encapsulated by soft carbon and Al 2 O 3 to fabricate HC@Si@SC@A sample for high performance lithium-ion batteries (LIBs). Micrometer-sized HC serves as size regulator for Si NPs and SC serves to improve electric conductivity and suppress volume changes. With the existence of Al 2 O 3 , a thin and inorganic components-rich solid electrolyte interphase (SEI) has formed, greatly maintaining the stability of electrode during cycling. Therefore, the HC@Si@SC@A anode delivers an ultrahigh discharge capacity of 14.5 mAh cm −2 at 0.2 A g −1 . It can show excellent performance as an anode of full cells with the NCM811 as the cathode material.
研究领域:
材料科学
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电化学
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纳米技术
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储能
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Run Li,Ying Yang,Zezhou Zhang,Shaohan Lian,Quan Zhao,Chunfeng Song
As a promising strategy to reduce greenhouse gas emissions, carbon dioxide capture from industrial and power plants has been proposed. Due to its advantages of low consumption and a modest environmental impact, membrane technology has been widely used in the gas separation process. Advanced porous fillers can be successfully added into the polymer matrix to create mixed matrix membranes (MMMs) with simple processing and applicable gas separation performance. The high porosity and stability of microporous carbon materials make them desirable for use in the gas separation process. Herein, N-doped microporous carbon microparticles (NMCP) were successfully synthesized and incorporated into UV crosslinked polyethylene oxide (XLPEO) matrix membranes. Fast CO 2 transport channels are created in MMMs by rationally constructing NMCP fillers with ultra-micropores (∼0.53 nm), high-content heteroatoms (N, 13.94%), and two-dimensional morphology. The relationship between the structure of the NMCP samples and the gas separation performance of MMMs was discussed. Additionally, tests were conducted on the effects of NMCP loading, operating conditions, and long-term stability of NMCP/XLPEO membranes. NMCP/XLPEO membranes with a 2.5 wt% NMCP loading displayed a CO 2 permeability of 606 Barrer and a CO 2 /N 2 selectivity of 56.4, approaching the 2019 upper bound. This work offers a novel perspective to build fast gas transport channels in porous carbon-based MMMs for carbon capture.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）