COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
·
IF 3.99
Yufei Wang,Haotian Zhang,Jun Xie,Yixuan Liu,Siling Wang,Qinfu Zhao
Recent years, photothermal therapy (PTT) as a noninvasive cancer treatment has attracted wide interests of researchers worldwide. Platforms which can transform near infrared (NIR) laser power into heat play vital roles in PTT. In this paper, mesoporous carbon nanospheres (MCN) and graphene oxide nanosheets (GO), two widely used platforms in cancer treatment were compared in photothermal effect induced by NIR as well as the drug loading and release behaviors of the model drug doxorubicin (DOX). MCN and GO were grafted with polyethylene glycol (PEG) to improve the biocompatibility and aqueous stability. The elevated temperature of MCN-PEG was obviously superior to GO-PEG both in vitro and cellular photothermal effect. MCN-PEG and GO-PEG showed photothermal stability under repeated NIR irradiation. Additionally, the photothermal conversion efficiency (η) of MCN-PEG was calculated to be 32.24 %, which was higher than that of GO-PEG (27.13 %). Both nanovehicles had the similar drug loading capacities, however, the accumulative release rate of DOX/MCN-PEG was 1.6 times higher than DOX/GO-PEG in the pH 5.0 phosphate buffer solutions (PBS) exposed to NIR laser. Moreover, the cell viability assays and cellular uptake experiments validated that DOX/MCN-PEG possessed more excellent synergetic effect in chemo-photothermal therapy with the combination index (CI) of 0.443 compared with DOX/GO-PEG (0.661).
研究领域:
生物医学工程
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肿瘤学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Xialan Zhang,Xin Wang,Ting Cheng,Qilang Lin
Nowadays, the reduction of dye contaminants in the aquatic environment has attracted widespread research attention. In this work, a novel mesoporous carbon nanospheres (MCNs)-based material as an adsorbent for dye removal was achieved by the carbonization of a composite of sucrose and aluminum sulfate without involving any hazardous activators. The as-obtained MCNs were analyzed by TG, XRD, FESEM, TEM, Raman, BET and XPS, meanwhile the batch experiments of Congo red (CR), Malachite green (MG) and Methylene blue (MB) on the MCNs were conducted to explore the impact of adsorption conditions on the adsorption process, respectively. Results show that the MCNs exhibit a uniform spherical morphology as well as partially graphitic structure with a large surface area of 449.25 m 2 /g, a relatively narrow pore size distribution and a high pore volume of 0.57 cm 3 g −1 . The unique porous structure of the MCNs endows it with high adsorption capabilities for dyes, including CR (1726.60 mg g −1 ), MG (980.55 mg g −1 ) and MB (708.82 mg g −1 ), suggesting its high adsorption capability for both anionic and cationic dyes. Meanwhile, the adsorption process is demonstrated to follow the Langmuir model and pseudo-second-order kinetic model, respectively, and the main adsorption mechanisms may involve pore filling, π-π conjugation, electrostatic attraction and hydrogen bonding. Furthermore, the as-synthesized adsorbent displays good recyclability performance for remaining relatively high sorption performance even after five regeneration cycles.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2015
·Vol. 20
·期 1
·153-161
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IF 2.446
Li Xiaogang,Rao Mumin,Li Weishan
We report a novel composite, sulfur (S) encapsulated in porous carbon nanospheres (PCNS) and coated with conductive polyaniline (PANI) (PCNS-S@PANI), as cathode of lithium–sulfur battery. PCNS is prepared by convenient and controllable hydrothermal synthetic route and loaded with S via chemical deposition and then coated with conductive polyaniline via in situ polymerization under the control of ascorbic acid. The physical and electrochemical performances of the resulting PCNS-S@PANI are investigated by scanning electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption–desorption isotherms, thermogravimetric analysis, electronic conductivity measurement, galvanostatic charge–discharge test, and electrochemical impedance spectroscopy. It is found that PCNS-S@PANI exhibits excellent charge–discharge performances as cathode of lithium–sulfur battery: delivering a discharge capacity of 881 mAh g −1 at 0.2 C (1 C = 1672 mA g −1 ) with a capacity retention of 72 % after 100 cycles and a rate capacity of 324 mAh g −1 at 2 C. These natures can be attributed to the co-contribution of PCNS and conductive PANI to the improvement in electronic conductivity and chemical stability of sulfur cathode.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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功能材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Youjing Shi,Lijie Wang,Wei Wei,Sheng Ding,Wen Zhang,Fan Li,Zhaoming Li,Xin Meng
Rapid and effective hemostasis can immediately control blood loss and prevent fatal complications. Chitosan sponge loaded with carbon nanospheres PC-800 for rapid hemostasis was first reported here. Preparation process is simple, green and low-cost. Specifically, microporous carbon nanospheres (PC-800) were synthesized by hydrothermal method and followed by calcination in high yield. Afterwards, PC-800 was homogeneously dispersed in the chitosan solution and lyophilized to obtain the composite sponge. The aim of this study is to explore the synergistic hemostatic effect of chitosan and PC-800 and validate its feasibility in trauma therapy. The composite sponges exhibited porous structure, suitable mechanical properties, strong water absorption capacity (49.2 ± 0.8 g/g), good hemocompatibility (hemolysis rate<5 %) and low cytotoxicity. However, cytotoxicity occurs with excessive PC-800 loads. The blood coagulation index of CS-1.0 with 9.5 % was significantly lower than the commercially available Celox Rapid. Upon application to a wound, CS-1.0 sponge rapidly forms a wound seal, achieving effective hemostasis through the synergistic action of chitosan and PC-800. Compared to Celox Rapid, tail hemorrhage and hepatic hemorrhage time in rats decreased to 73 s and 34 s, respectively. The composite sponges were expected to be a safe and fast hemostatic dressing for uncontrolled bleeding during emergencies.
研究领域:
生物医学工程
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材料科学
·
止血材料研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ning Liu,Yanjian Wang,Xiangyi Zhang,Enhui He,Zhiming Zhang,Liangmin Yu
Porous carbon nanospheres are considered potential multifunctional material candidates for supercapacitors and electromagnetic wave absorption due to their special chemical and physical properties. In this article, N, O-doped litchi-like porous carbon nanospheres (LPCNs) were originally synthesized through temperature controllable engineering. The ultrahigh specific surface area reached 2666.7 m 2 g −1 due to their rich pore structure. The optimal electrode specific capacitance reached 448.5 F g −1 at a current density of 0.5 A g −1 and 220 F g −1 at a current density of 10 A g −1 . Notably, the electrode exhibited a remarkable cycling performance of 93 % retention rate after 10,000 cycles at 10 A g −1 . Furthermore, the LPCNs/zinc acrylate resin (ZAR) composite coating exhibited excellent electromagnetic wave absorption properties. The minimum reflection loss (RL min ) value reached −47.39 dB at 2.5 mm, and the effective bandwidth covered the entire band (18–40 GHz) at a thickness ≥ 3.0 mm. This material is expected to be an outstanding supercapacitor electrode material and electromagnetic absorption material due to its high specific capacitance, high reflection loss, and wide absorption, which can improve the utilization rate of materials and provide a new method for the development and application of multifunctional materials.
研究领域:
材料科学
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能源存储
·
电磁学
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 3
·1-7
·
IF 5.479
Zhao Qiming,Miao Xinyue,Yu Jianan,Zhu Yan
This work presents a method for covalent quaternization of porous carbon nanospheres (PCNSs) and their application as anion exchanging stationary phase for ion chromatography. The PCNSs were covalently quaternized via the dehydration condensation between surface carboxyl groups and polyethyleneimine. This was followed by a repeated epoxy-amine addition reaction with ethylene glycol diglycidyl ether. As a result, surface methylamino groups are formed. The electrostatic interaction between quaternized PCNSs and sulfonated poly(polystyrene-co-divinylbenzene) resulted in the formation of an agglomerated stationary phase. The capacities (41.5–90.2 μequiv) and pressures (540–1150 psi) of column packed with novel phases (100 × 4.0 mm i.d.) were further increased with grafted polymer layer counts (2–5). Common inorganic anions, small organic acids and saccharides were rapidly separated on the new phases. The column efficiencies for seven inorganic anions ranged from 38,400 to 13,200 plates m −1 . Through 8 days of flushing test, the RSD values for retention time and efficiencies varied from 0.56% to 1.32%, and from 0.34% to 0.74%, respectively.
Schematic presentation of the covalent modification of porous carbon nanospheres (PCNSs) with hyperbranched quaternized polymers via the amidation and epoxy-amine addition reaction was depicted. Functionalized PCNSs were further applied as agglomerated materials of polymeric stationary phase for ion chromatography (IC).
研究领域:
分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MODERN PHYSICS LETTERS B
·
2023
·
IF 1.9
Bin Wang,Miao Tang,Wanting Li,Wenjing Dong,Xiaowen Ge,Naibao Huang
In order to increase the activity and decrease the cost of oxygen reduction reaction (ORR) catalyst, S self-doped porous carbon nanospheres ORR catalyst was prepared by pyrolyzing the block copolymer F127 grafted with 3-mercapto-propanoicaci. The composition and microstructure were characterized and its electrochemical performance was also investigated in O 2 -saturated 0.1 M KOH solutions. The results showed that, among all the obtained samples, C-S-750 had a porous carbon nanosphere structure with the doped sulfur of 7.08 at % and a maximum specific surface area of 776.3 m 2 /g. The onset potential, half-wave potential and limiting current density of C-S-750 were 0.92 V (versus RHE) and 0.80 V (versus RHE) and 5.77 mA/cm 2 @0.45 V in O 2 -saturated 0.1 M KOH solution, respectively, which were close to that of commercial 20% Pt/C catalysts. This provides a new way to introduce and increase the doped heteroatom in metal-free ORR catalysts.
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 Energy Materials
·
2025
·
IF 5.5
Jiaxue Gao,Hua Lin,Tianwei Wang,Caicheng Song,Rongwen Lu,Shufen Zhang
Nowadays, supercapacitors as energy storage devices have gradually attracted more attention. In this paper, a tailored “staggered reaction” strategy was employed to synthesize the N/S codoped hollow porous carbon nanospheres as an electrode material for high-performance supercapacitors. This manner features the appropriate involvement of the solvent acetone in the reaction within the system, which enables the sequential reaction process to obtain the core–shell structure with different internal and external compositions. Furthermore, the core could be dissolved by soaking in a formic acid solution, thereby achieving a targeted hollow structure. In addition, in situ doping was achieved by selecting suitable precursors (m-phenylenediamine and 2,4-diaminobenzenesulfonic acid) containing N and S, and the effect of N and S content on performance was investigated in detail. The results reveal that with the increase of N and S content, the specific capacitance of carbon nanospheres first increases and then decreases. Ultimately, the maximum specific capacitances of 398 and 277 F·g–1 were obtained under the current density of 0.2 A·g–1 in a three-electrode system and a two-electrode system, respectively. After 10,000 cycles, the specific capacitance can be basically maintained at 100% with excellent cycling stability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jinlong Hu,Qingqing Chen,Qi Xia,Lingzhi Zhang
Heteroatom-doped hollow carbon nanostructures are one of the most promising sulfur hosts for high-performance lithium-sulfur (Li-S) batteries. However, finding a facile and controllable synthesis and enhancing their immobilization effect on polysulfides have been challenging. Herein, we propose a one-step in-situ reaction approach to synthesize N/F dual-doped hollow micro/mesoporous carbon nanospheres (NFHCs) as multifunctional sulfur host, which integrates the physical confinement of hollow porous structure and chemical adsorption/catalytic ability of N/F active sites to realize strong anchoring and accelerated conversion of polysulfides. This sulfur cathode based on NFHCs host with a high sulfur content of 80 wt% enables a superior high-rate capacity of 689 mAh g −1 at 3C, accompanied by outstanding cycle life over 500 cycles at 2C with a capacity decay of only 0.05% per cycle and nearly 100% Coulombic efficiency. This work opens up new horizons to design nanostructured functional hollow carbons for advanced Li-S batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 19
·10976-10982
·
IF 3.049
Si Zheng,Yin Cui,Jianwei Zhang,Yuxing Gu,Xiaowen Shi,Chuang Peng,Dihua Wang
N-doped porous carbon nanospheres were fabricated directly by pyrolyzing chitin nanogels, which were facilely prepared by mechanical agitation induced sol–gel transition of chitin solution in NaOH/urea solvent. The resulting carbon nanospheres displayed ordered micropores (centered at ∼0.6 nm) and high BET surface area of up to 1363 m2 g−1, which is substantially larger than that of the carbons from raw chitin (600 m2 g−1). In addition, the carbon nanospheres retained a nitrogen content of 3.2% and excellent conductivity. Consequently, supercapacitor electrodes prepared from the carbon nanospheres pyrolyzed at 800 °C showed a specific capacitance as high as 192 F g−1 at a current density of 0.5 A g−1 and impressive rate capability (81% retention at 10 A g−1). When assembled in a symmetrical two-electrode cell, N-doped porous carbon nanospheres demonstrated excellent cycling stability both in aqueous and organic electrolytes (95% retention after 10 000 cycles at 10 A g−1), together with outstanding energy density of 5.1 W h kg−1 at the power density of 2364.9 W kg−1. This work introduces a novel and efficient method to prepared N-doped porous carbon nanospheres directly from chitin and demonstrates the great potential of utilization of abundant polymers from nature in power storage.
研究领域:
材料科学
·
能源存储
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2016
·
IF 4.803
Ying Liu,Lingyang Liu,Lingbin Kong,Long Kang,Fen Ran
Metal nitride-based supercapacitors can provide superb electrical conductivity, high capacitance, and wide operating potential window, but they do not have sufficient fabrication strategy to construct advanced nano-structure beneficial to electrochemical process. In this paper, we report an in-situ preparation approach of vanadium nitride nanoparticles on porous carbon nanospheres (PCNS@VNNP) by the ammonification process of ionic amphiphilic triblock copolymer micelles/vanadium-contained ions system in NH 3 /N 2 atmosphere. The prepared PCNS@VNNP material has a wide operating potential of 1.2 V, and a capacitance of 229.7 F/g (275.6C/g). A hybrid supercapacitor device of PCNS@VNNP//NiO exhibits a high energy density of 16 Wh/kg at the power density of 800 W/kg. The improvement mostly stems from the quantum dot size of vanadium nitride and the supporting of porous carbon, which would dramatically enhance the utilization of active material without affecting its electric conductivity.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 28
·14254-14264
·
IF 11.301
Qipeng Cai,Jie Mao,Yuntong Li,Jun Liu,Hong Zhang,Junwen Huang,Tong Wu,Yuxin Yang,Conghui Yuan,Lizong Dai
In this work, utilizing a dynamic imine exchange, we develop a selective etching strategy to construct porous polymer nanosphere precursors, which can be subsequently carbonized into hierarchical porous carbon nanospheres (PCNPs) co-doped with both N and P elements. Our strategy to construct polymer precursors is simple, suitable to various aldehyde and amino building blocks and easy to incorporate heteroatoms into the carbon matrix. Importantly, by simply adjusting the concentration of the etching agent, PCNPs with micro- and meso-pores or even hollow structures can be controllably fabricated. The as-prepared PCNPs exhibit excellent electrochemical performance with the highest specific capacitances of 359.5 F g−1 at 0.5 A g−1 and 224.0 F g−1 at 20 A g−1 under acidic conditions (1 M H2SO4). The cycling stability of the PCNPs is also attractive, with a capacitance retention of ∼95% after 5000 cycles. Semi-solid-state supercapacitors assembled using PCNPs as electrodes and H2SO4/PVA as a gel electrolyte exhibit specific capacitances up to 226.7 F g−1 at 0.2 A g−1 and 126.0 F g−1 at 20 A g−1.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）