APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Zhenglong Yang,Kangyu Fu,Jing Yu,Xujing Shi,Peiting Zhou,Zhihao Cheng
Polylactide-b-fullerene-b-poly(3-hexylthiophene) (PLA- b -C 60 - b -P3HT) triblock copolymer via a combination of 1,3-dipolar cycloaddition reaction and controlled ring-opening polymerization technique was successfully synthesized. The structure, morphology and crystallinity of PLA- b -C 60 - b -P3HT copolymer were characterized by 1 H NMR, GPC, DSC, TGA, XRD, UV–vis, PL and AFM measurements. Nanoporous C 60 /P3HT films were easily prepared from PLA- b -C 60 - b -P3HT triblock copolymer by casting the copolymer followed by thermal annealing and chemical etching of the PLA chains. Fullerene molecules could self-assembly between P3HT and PLA to form a continuous film. An ordered nanoporous C 60 /P3HT film was formed in AFM by chemically etching the PLA microphase with NaOH solution. Photoluminescence analysis showed that the photoinduced electron transfer of the ordered nanoporous C 60 /P3HT film was significantly improved compared to the physically blending sample due to the increased interface between the P3HT and the C 60 .
研究领域:
材料科学
·
有机光电材料
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 1
·380-391
·
IF 3.553
Hou Ying,Nie Bei
Abstract With an in situ synthesized AgNO 3 complex molecular cage, icosahedral C 60 can be selectively extracted from fullerene mixture by a facial liquid–liquid interfacial precipitation, resulting in exclusive C 60 organometallic microcrystal (C 60 /C 70 = 6/1). By exploiting its intrinsic insolubility against nonpolar solvent, the C 60 can be separated from the homologues, C 70 , which contrarily is assembled through merely hydrophobic interaction and π-π stacking. The AgNO 3 complex encaged C 60 crystal was morphologically and structurally characterized by SEM, Raman and XRD spectra to revealing the underlying separation mechanism. The selective extraction efficiency (89.7%) was semiquantitatively characterized by combined optical spectroscopy and mass spectrometry, indicating a decent specificity of spontaneously formed molecular cage toward C 60 extraction. Thus, this discovery of a template-specific molecular cavity would pave the way to advance molecular imprinting technology using supramolecular array for fullerene separation, prevailing over the conventional “design-synthesis-performance” strategy by substantially reducing the laborious work and economic cost. Graphic abstract
研究领域:
化学
·
材料科学
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DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 42
·16375-16385
·
IF 7.367
Shengju Zhou,Lin Wang,Mengjun Chen,Baoyong Liu,Xiaofeng Sun,Meirong Cai,Hongguang Li
Superstructures from fullerene C60-containing compounds, especially those tethered to rigid functional groups with defined shapes, remain largely unexplored. Being the smallest diamondoid, adamantane (Ad) can be viewed as a promising building block for the construction of well-defined superstructures. Here, we report the syntheses of 1 : 1 (4a) and 2 : 1 (4b) Ad-C60 hybrid molecules, which were then used to construct superstructures in binary solvent mixtures via a modified liquid/liquid interfacial precipitation (LLIP) method using CHCl3 as a good solvent. Typically in the combination of DMSO/CHCl3 with a final concentration (cf) of 1.0 mmol L−1, 4a successively forms spheres, plates, nanoflowers and plicated particles with increasing content of DMSO while 4b forms cuboid blocks and microparticles with hierarchically organized surfaces. Changing from DMSO to other poor solvents including acetone, MeOH and EtOAc leads to variations of the morphology of the superstructures for both 4a and 4b. At the nanometer length scale, 4a and 4b adopt different organizations within the superstructures. While 4a tends to self-organize into lamellae with highly ordered C60 layers, the hexagonal phase is dominant in the superstructures formed by 4b. Wettability tests indicate that films formed by the superstructures of 4a and 4b show anti-wetting properties. Besides the solvent effect, the morphology of the superstructures can be also tuned by concentration. For example, when cf is lowered to 0.5 mmol L−1, a new form of superstructure, i.e., fibers, was detected for 4a. Our results also indicate that besides the solvent-induced aggregate transition, gravity-induced sedimentation and subsequent structure ripening can have a significant influence on the final morphology of the superstructures and the aggregate transition pathways.
研究领域:
材料化学
·
纳米科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 19
·11426-11435
·
IF 4.22
Yan Dong,Peng Zhen,Wang Wei,Zeng Peng,Huang Yiyin
Abstract Carbon-based metal-free catalysts exhibit great applications in electrochemical CO 2 reduction (ECR), while most studies merely focus on large-sized carbons with limited ratio of surface atoms for engineering to create surface active centers. Here, we report a joint treatment of C60 by heating and plasma to induce a dramatic performance promotion during ECR. The electrochemical measurements indicate the Faraday efficiency for ECR toward CO production kept at high level over 80% in a wide potential region from − 0.4 to − 0.7 V versus RHE, with the highest value reaching 96.8%. The physical characterization reveals that fragmentation of C60 occurs together with N/O doping, both of which could induce change in electron structure, causing the formation of *COOH intermediate and ultimately leading to the optimized activity and selectivity for CO production. This treatment route was further revealed to be applicative for other carbon materials, e.g., single-walled carbon nanotube, to promote its ECR activity and selectivity. Graphical Abstract
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
·
2022
·Vol. 30
·期 1
·230-237
·
IF 2.509
Bin Du,Yuxiang Mai,Nanqing Chen,Yushun Zhao
The interfacial effect of nanoparticles can effectively regulate electron migration in epoxy composites. In this article, hydroxylated C60 [C60(OH)] was prepared and added to epoxy resin (EP). The inhibition of electron motion in epoxy composites was realized, and the dielectric strength of the epoxy composites was improved. The results of dynamic mechanical analysis (DMA) showed that C60(OH) regulated the structure of the crosslinked EP network and increased the crosslink density by 16.5%. The results of a density functional theory (DFT) simulation showed that the doping of C60(OH) formed a potential energy barrier at the C60(OH)-EP interface, which was conducive to the directional migration and capture of electrons driven to C60(OH). Electrostatic force microscopy (EFM) and pulsed electroacoustic (PEA) experiments showed that C60(OH) had a strong ability to capture charge, and the charge migration rate of C60(OH)/EP was 43% lower than that of pure EP in the presence of 10 kV/mm when the EP was doped with 0.1wt% C60(OH). The breakdown strength and volume resistivity increased by 17.87% and 222%, respectively. Thus, this article provides a new method to improve the dielectric strength of epoxy composites.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
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2016
·
IF 3.471
Yukun Wang,Dezhi Yang,Xiaokang Zhou,Saad M. Alshehri,Tansir Ahamad,Agafonov Vadim,Dongge Ma
CH 3 NH 3 PbI 3 /C 60 heterojunction photodetectors were here fabricated. The peak EQE achieves ∼80% in the visible-light range from 400 to 760 nm. Benefitting from eliminating the leakage current (PEDOT:PSS-free), extremely low dark current density (0.6 nA/cm 2 ) and high specific detectivity (2.7 × 10 13 Jones) are acquired.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2017
·
IF 0
Yanping Zhu,Minwang Laipan,Runliang Zhu,Tianyuan Xu,Jing Liu,Jianxi Zhu,Yunfei Xi,Gangqiang Zhu,Hongping He
A novel and efficient photocatalyst was synthesized by surface hybridizing Zn/Ti-LDH (LDH) with C60 molecules. The structural characteristics of the resulting products (C60/LDH) were studied using a variety of characterization methods, and the photocatalytic activities of C60/LDH were tested using Orange II (OII) as a model contaminant under simulated solar irradiation. The FT-IR spectra showed that the characteristic mode of C60 at 1182 cm −1 split into two peaks at approximately 1240 and 1156 cm −1 ; in addition, the Raman spectra showed the band at 1422 cm −1 for C60 was upshifted to 1431 cm −1 with the increased doping amount of C60. In addition, the XPS spectra revealed that the peaks of O1s, Zn 2p, and Ti 2p were downshifted slightly. These results demonstrated that chemical interaction existed between C60 and LDH on C60/LDH. The UV–vis diffuse reflectance spectra confirmed that the absorbance of C60/LDH in visible-light region enhanced markedly, as compared with that of pristine LDH. The photoluminescence (PL) spectroscopic measurement revealed that the C60/LDH composites exhibited much weaker PL intensity than that of LDH sample, and the transient photocurrent ( I – V ) analysis showed that C60/LDH had higher photocurrent density than pristine LDH. The results of PL spectra and I–V analysis suggested that C60 molecule could effectively transfer the photoelectrons from the conduction band of LDH, leading to a lower recombination rate of the photo-induced electrons and holes. The photocatalytic experiments showed that C60/LDH had much higher photocatalytic activity in the decolorization of OII than that of pristine LDH, and 2%C60/LDH composite exhibited the highest photocatalytic activity. Furthermore, the stability test indicated that the decolorization efficiency of OII by 2%C60/LDH was still quite efficient after being used for 5 cycles.
研究领域:
材料科学
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环境科学
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产品关联
DOI
ENVIRONMENTAL POLLUTION
·
2020
·
IF 6.793
Jingwei Wang,Qiao Ma,Zhaojing Zhang,Catherine Sekyerebea Diko,Yuanyuan Qu
Buckminster fullerene (C 60 ), the most representative type among fullerenes, has attracted widely attentions because of its many potential applications. The increasing application of fullerene and limited knowledge of its environmental fate are required concerns. Herein, the biotransformation of C 60 by Labrys sp. WJW was investigated. Cell numbers reached 25.76 ± 1.85 folds within 8 days using 100 mg/L C 60 as sole carbon source. The biotransformation of C 60 by Labrys sp. WJW was analyzed by various characterization methods. Raman spectra indicated that strain WJW broke the soccer ball like structure of C 60 . After 12 days, over 60% of C 60 was degraded evidenced by UV–vis spectrophotometry and liquid chromatography-mass spectrometry. The underlying biotransformation mechanism of C 60 through an extracellular Fenton-like reaction was illustrated. In this reaction, the • OH production was mediated by reduction of H 2 O 2 involving a continuous cycle of Fe(II)/Fe(III). Bacterial transformation of C 60 will provide new insights into the understanding of C 60 bioremediation process.
研究领域:
环境科学
·
微生物学
✓ 已验证
DOI
PubMed
高影响因子
TALANTA
·
2013
·
IF 3.498
Hongjuan Wu,Caihong Zhang,Lifeng Li,Jianbin Chao,Yujie Han,Chuan Dong,Yujing Guo,Shaomin Shuang
A novel open-bowl pyramidal compound cyclotriveratrylene–carbazole (CTV–CZ) was designed and synthesized. Its absorption and emission spectroscopic properties in different organic solvents were characterized. Three absorption peaks of CTV–CZ around 235 nm, 260 nm and 290 nm were observed. The fluorescence emission peaks were at about 353 nm and 368 nm using a solution of ∼10 −7 M CTV–CZ. The intermolecular interaction between CTV–CZ and fullerene (C 60 ) was studied in detail by UV–vis absorption and fluorescence spectra . CTV–CZ could associate with C 60 to form supramolecular complex with 1:1 molar ratio and the binding constant was estimated to be 5.0(6)×10 4 M −1 by fluorimetry. The formation of inclusion complex for CTV–CZ and C 60 was further confirmed by 1 H NMR and cyclic voltammetry . The downfield shift of protons of CTV–CZ in its 1 H NMR spectrum and the decrease of redox currents on addition of C 60 showed that photo induced electron transfer (PET) occurred from the electron donor CTV and CZ units to the electron acceptor C 60 .
研究领域:
化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 38
·22084-22091
·
IF 10.733
Deng-Yue Zheng,En-Xuan Chen,Chun-Rong Ye,Xiao-Chun Huang
The selective oxidation of primary thioethers to sulfoxides is an important reaction in the production of pharmaceuticals, agrochemicals, and other valuable fine chemicals. However, the achievement of high conversion and selectivity towards sulfoxide during thioether oxidation under mild conditions still remains a great challenge. In this study, we found a new method to overcome the abovementioned challenge by applying the C60@PCN-222 composite as a catalyst in the photo-oxidation of thioethers. The C60@PCN-222 composite was obtained by the integration of guest C60 molecules and a porous porphyrin-based metal–organic framework (MOF), PCN-222; we proposed that the photogenerated electron–hole separation of PCN-222 could be significantly enhanced through the encapsulation of C60 molecules with a large, highly delocalized π-conjugation, which provided a great contribution to the high conversion and selectivity of this type of reaction. Under air and low optical power (50 mW cm−2) conditions at room temperature, the composite exhibited excellent catalytic performance; we further explored the underlying mechanism of action of this photocatalyst by investigating the reactive oxygen species via ESR spectral analysis and adjusting the experimental conditions. It has been revealed that superoxide radicals, generated by electron transfer from a photoexcited MOF to the C60 molecules, serve as the main active species for the oxidation.
研究领域:
材料科学
·
催化化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Haocheng Zhai,Baoshan Wu,Shoaib Muhammad,Qihui Sun,Hanrui Tian,Yifan Liu,Panfeng Zhao,Chunhong Mu,Nasir Mahmood,Xian Jian
An ideal microwave absorption material involves multilevel precise regulation and construction at multiple scales, which remains a great challenge. For the first time, we develop a host–guest self-assembling strategy via the entrapment of fullerene C60 molecule guest in a zeolitic imidazolate framework-67 (ZIF-67) host to design the hierarchical structure for a high-performance microwave absorber covering the molecular scale, nanoscale, and microscale synergistic effects. Typically, the two-dimensional orientation growth of microscale ZIF-67 precursors in solution is achieved by introducing C60 molecules. After the accurate pyrolysis process, Co nanoparticles derived from C60@ZIF-67 are embedded into ultrathin carbon flake (CF) substrates, favoring uniformity, size diminishment, and surface stability. These as-synthesized uniformly dispersed C60/Co/CF composites possess advantages of dual dielectric and magnetic loss functions, exhibiting the great microwave absorption properties with a minimum reflection loss of −58.03 dB and the effective absorption bandwidth of 5.94 GHz. This proposed host–guest self-assembling strategy has great potential for the synthesis of other metal–organic framework materials in the field of microwave absorption.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Fei Jin,Xingshun Wu,Feng Gao,Hong-Liang Ge,Song Wang,Ying Wang,Qiong Wu,Hua Yang
Unique electrical properties and chemical modifiability make fullerenes convenient for the fabrication of various measurement devices. In this paper, the fullerene derivative, C 60 -Lys, with abundant –OH,-NH 2 , and -COONa, has been creatively used to obtain a humidity sensor with high response (ΔI/I ≈ 2000) and low hysteresis (ΔH≈2.9% RH). The response time and recovery time of the C 60 -Lys sensor reach 24s and 29s respectively in the range of 11–97% relative humidity (RH). Hydrogen bonding and van der Waals forces between fullerene derivatives and water molecules play an important role in the adsorption and desorption of water molecules while the formation of ions causes rapid changes in the impedance of the C 60 -Lys sensor. It is worth noting that the device has excellent reproducibility and stability. These indicate it is a very good strategy to synthesize new humidity sensing materials by modifying groups on fullerenes to change the hydrophilicity of the surface.
研究领域:
材料科学
·
电子工程
✓ 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）