Scientific Reports
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2024
·Vol. 14
·期 1
·1-12
·
IF 3.8
Yin Jinpeng,Wang Guanqin,Kong Dongqing,Li Chuang,Zhang Qiang,Xie Dongbai,Yan Yangyang,Li Ning,Li Qiang
To enhance the volumetric energy density and initial coulombic efficiency (ICE) of titanium oxide (TiO 2 ) as anode electrode material for lithium-ion batteries (LIB), this study employed a surface-confined in-situ inter-growth mechanism to prepare a TiO 2 embedded carbon microsphere composite. The results revealed that the composite exhibited a highly integrated structure of TiO 2 with oxygen vacancies and carbon, along with an exceptionally small specific surface area of 11.52 m 2 /g. Due to its unique microstructure, the composite demonstrated remarkable lithium storage properties, including a high ICE of 75%, a notable capacity of 426.8 mAh/g after 200 cycles at 0.2 A/g, superior rate performance of 210.1 mAh/g at 5 A/g, and an outstanding cycle life, with a capacity decay rate of only 0.003% per cycle over 2000 cycles. Furthermore, electrochemical kinetic studies further validated the advantages of this microstructure.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 9.8
Fanqiushi Yue,Tongmin Li,Yanping He,Jiating Zhong,Xianmeng Du,Shangfeng Du,Yuanzhi Zhu
Iron‑nitrogen-doped carbon materials (Fe-N-C) have gained widespread attention due to their low cost and excellent catalytic activity toward the oxygen reduction reaction (ORR). However, nanoscale Fe-N-C tend to agglomerate, impairing their catalytic activity. Porous carbon materials, with their high specific surface area and good conductivity, are an ideal support framework for the preparation of these catalysts. In this study, we demonstrate a novel iron‑nitrogen-doped carbonized polystyrene eggshell-like microspheres encapsulating hollow nanoparticle catalyst (Fe-N-CMS) by an environmentally friendly and facile synthesis method using the suspension polymerization technology. The experimental results demonstrate that the hydrophobicity of the pore-forming agent plays a key role in controlling the catalyst structure and an optimal Fe content to form Fe N complex determines the ORR activity. With the unique structure, the optimized Fe-N-CMS catalyst exhibits a half-wave potential of 0.932 V, and the peak power density in the zinc-air battery (ZAB) test reaches 130.8 mW cm −2 , which is comparable to that of 20% Pt/C (128.6 mW cm −2 ), along with a specific capacity of 804.46 mAh g −1 at 10 mA cm −2 and excellent long-term stability, maintaining a discharge voltage of approximately 1.12 V and 2.01 V over 120 h (720 cycles) with negligible polarization growth. Thus, this work presents an effective strategy for fabricating Fe-N-C catalysts to strengthen catalytic activity toward the ORR in the energy storage and conversion field.
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ENERGY CONVERSION AND MANAGEMENT
·
2017
·
IF 5.589
Yaoyao Feng,Ling Li,Xin Wang,Jinbei Yang,Ting Qiu
Usually, traditional poly (ionic liquid)s are prepared to nanoparticles with high surface areas for achieving a quasi-homogeneous reaction system. In this work, a novel poly (ionic liquid) P(VB-VS)HSO 4 , synthesized by simply using ionic liquids immobilized on the 1-vinylimidazole-based crosslinked copolymer microsphere, was used as heterogeneous catalyst for transesterification of a novel non-edible feedstock soapberry oil to biodiesel. The structure, thermal stability and wetting property characteristics of the crosslinked copolymer microsphere particles and poly (ionic liquid) microspheres were investigated. The results indicated that ionic liquids were successfully functionalized on crosslinked copolymer microsphere, and P(VB-VS)HSO 4 possessed high surface areas (100.1 m 2 /g), abundant meso -macropores (with diameter of ∼18.9 nm), good mechanical strength (81 N) and superior thermal stability. Benefiting from the unique structure features, these poly (ionic liquid) microspheres manifested excellent catalytic performance for transesterification of soapberry oil with methanol. A maximum fatty acid methyl esters (FAMEs) yield of 95.2% could be obtained under the response surface methodology (RSM) optimized conditions of 8.0 h reaction time, 29.1 methanol to oil molar ratio, and 8.7 wt% catalyst amount. Impressively, it was also efficient for the esterification of oleic acid, giving methyl oleate yield of 97.5%. Catalytic tests exhibited that P(VB-VS)HSO 4 presented high catalytic activity and good reusability in comparison with traditional acid catalysts. The main physicochemical of the obtained soapberry biodiesel met the biodiesel standard ASTM D6751 . Therefore, this work provides a cheap and facile route to the synthesis of size-controlled poly (ionic liquid) microspheres (the diameter of the catalyst was about 500 μm) for catalyzing the production of clean biofuels.
研究领域:
催化化学
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能源材料
·
绿色化学
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生物燃料
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高分子化学
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表面科学
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反应工程
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DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Shiyu Li,Kui He,Rong Liao,Chunyan Chen,Xiaoming Chen,Changqun Cai
An interference-free and label-free sensing platform was developed for the highly sensitive detection of microRNA-21 (miRNA-21) in vitro by magnetic silicon microsphere (MNP)-reduced graphene oxide (rGO)-based sandwich probe. In this method, DNA capture probes (P 1 ) were connected with MNPs at the 5′ end and hybridized with completely complementary target miRNA. Subsequently, rGO was retained and induced the fluorescence quenching in the supernatant. Through the magnetic separation, the supernatant environment was simplified and the interference to analytical signal was eliminated. When DNA capture probe-modified magnetic silicon microspheres (MNP-P 1 ) were adsorbed through rGO in the absence of a target and formed a sandwich structure, the formed nanostructure was easily removed from the solution by a magnetic field and the fluorescence intensity was maximally recovered. This proposed strategy, which both overcame the expensive and cumbersome fluorescent labeling , and eliminated interference to analytical signal for guaranteeing high signal-to-background ratio, exhibited high sensitivity with a detection limit as low as 0.098 nM and special selectivity toward miRNA-21. The method was potentially applicable for not only detection of miRNA-21 but also various biomarker analyses just by changing capture probes.
研究领域:
生物传感器
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纳米技术
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分子诊断
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2017
·
IF 3.133
Long Huang,Bingchuan Liu,Huijie Hou,Longsheng Wu,Xiaolei Zhu,Jingping Hu,Jiakuan Yang
NiMn layered double hydroxide (NiMn LDH) and NiMn LDH/reduced graphene oxide (rGO) with flower-like 3D composite were synthesized by a simple solvothermal process. The electrochemical properties of NiMn LDH/rGO composite with different contents of rGO were studied, resulting in enhanced capacitance due to the incorporation of rGO compared with pristine NiMn LDH. The NiMn LDH/rGO composite containing 4.46 wt% rGO (LDH/rGO-4) exhibited the highest specific capacitance of 1500 F g −1 at 1 A g −1 with an excellent cyclic stability of 90.5% over 5000 charging and discharging cycles at 20 A g −1 . The asymmetric supercapacitor assembled with LDH/rGO-4 and rGO electrodes exhibited a high specific capacitance of 82.5 F g −1 at 0.5 A g −1 and superior energy density of 29.3 Wh kg −1 . These results illustrate that the LDH/rGO-4 composite is a promising material for supercapacitor applications.
研究领域:
材料科学
·
能源存储
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DOI
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 8
·2340-2348
·
IF 5
Zhenzhen Yang,Yuhan He,Pengfei Tang,Chenhui Xu,Genlei Zhang,Jianbo He
It is challenging to effectively convert fructose to 2,5-diformylfuran (DFF) over a simple and low-cost bifunctional catalyst. In this study, an oxygen-incorporated 3D flower-like MoS2 microsphere is prepared by a simple hydrothermal procedure and serves as a highly active bifunctional catalyst exhibiting both acidity and oxidability, which contribute to the dehydration of fructose to HMF and the aerobic oxidation of HMF to DFF, respectively. A DFF yield of 98.1% with a HMF conversion of 100% is achieved in the aerobic oxidation of HMF to DFF catalyzed by MoS2 under the optimum reaction conditions. Based on the experimental and catalyst characterization results, a possible reaction mechanism that involved Mo6+/Mo4+ is proposed for MoS2-catalyzed oxidation of HMF to DFF. Then, MoS2 is used as a bifunctional catalyst for direct conversion of fructose to DFF, achieving a high DFF yield of 81.3% by a “one-pot, two-step” strategy. Importantly, the as-prepared MoS2 catalyst reveals no significant change in five consecutive reaction runs demonstrating the excellent stability of the catalyst.
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高影响因子
Materials Today Bio
·
2023
·
IF 8.2
Chuan Xie,Qinqin Xiong,Yuanzhi Wei,Xin Li,Jiajun Hu,Min He,Shinan Wei,Jia Yu,Sha Cheng,Mashaal Ahmad,Yufei Liu,Sihai Luo,Xi Zeng,Jie Yu,Heng Luo
Sustained drug release has attracted increasing interest in targeted drug therapy. However, existing methods of drug therapy suffer drug action time, large fluctuations in the effective concentration of the drug, and the risk of side effects. Here, a biodegradable composite of polybutylene adipate co-terephthalate/polyvinylpyrrolidone (PBAT/PVP) consisting of electrospun hollow microspheres as sustained-released drug carriers is presented. The as-prepared PBAT/PVP composites show faster degradation rate and drug (Erlotinib) release than that of PBAT. Furthermore, PBAT/PVP composites loaded with Erlotinib provide sustained release effect, thus achieving a better efficacy than that after the direct injection of erlotinib due to the fact that the composites allow a high drug concentration in the tumor for a longer period. Hence, this work provides a potential effective solution for clinical drug therapy and tissue engineering using drug microspheres with a sustained release.
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Shuting Tian,Yang Bai,Shuangshuang Li,Zuoming Chen,Liyun Zhang,Hongjie Li,Peng Zhou,Yi He
Microsphere layers/nanofibrous membranes decorated with UiO-66-NH 2 as a metal-organic framework (MOF) were successfully obtained by one-step coaxial electrospinning. The coaxially spun dense microsphere/wire-like structure and UiO-66-NH 2 hydrophilic components with excellent hydration ability enabled the prepared membrane to have excellent static and dynamic adsorption capacity for dyes and oil-in-water emulsion separation performance (adsorption capacity >247 mg/g; separation efficiency >99%). What's more, the membrane can purify complex wastewater dynamically and efficiently (separation efficiency >99%). After the membrane was desorbed in ethanol and methanol, the reversible recovery rate was as high as 98%, indicating its excellent recyclability. In a word, the as-prepared membrane has broad prospects in the remediation of complex polluted water bodies containing dyes-oil.
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高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mengyi Zhang,Xiaohui Sun,Xudong Cai,Xiaolu Zhan,Yufei Wu,Xuyang Zhang,Guohua Wu,Xiangwei Wang
In the field of electromagnetic wave (EMW) absorption, carbon matrix materials based on metal–organic frameworks (MOFs) have drawn more interest as a result of their outstanding advantages, such as porous structure, lightweight, controlled morphology, etc. However, how to broaden the effective absorption bandwidth [EAB; reflection loss (RL) ≤ −10 dB] is still a challenge. In this paper, large microsphere structures of a Co/C composite composed of small particle clusters were successfully prepared by the solvothermal method and annealing treatment. At a filling ratio of 40 wt %, the Co/C composite shows attractive microwave absorption (MA) performance after being annealed at 600 °C in an atmosphere of argon. With an EAB of 6.32 GHz (9.92–16.24 GHz) and a thickness of just 2.57 mm, the minimum RL can be attained at −54.55 dB. Most importantly, the EAB can attain 7.12 GHz (10.88–18.0 GHz) when the thickness is 2.38 mm, which is larger than that of the majority of MOF-derived composites. The superior MA performance is strongly related to excellent impedance matching and a higher attenuation constant. This study provides a simple strategy for synthesizing a MOF-derived Co/C composite with a wide EAB.
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yiting Feng,Xiuli Wang,Yinghao Chang,Jia Guo,Changchun Wang
Hypothesis: Surface-enhanced Raman spectroscopy (SERS) has become an emerging and reliable tool for detecting pesticide residues due to its high sensitivity, fast testing speed and easy sample handling. SERS active substrates are the key to achieve efficient and sensitive detection. However, for the most widely used noble metal nanoparticles, there are problems of high noble metal nanoparticle usage and random aggregation. The micron-scale Raman spot is focused on multiple randomly aggregated nanoparticles during the test, resulting in poor reproducibility. Therefore, the development of micron-scale cost-effective SERS substrates with good reproducibility and simple detecting method is of great significance in practical detection. Experiments: Through deposition of silver nanoparticles (Ag-NPs) by chemical reduction on the surface of monodisperse sulfonated polystyrene (SPS) microspheres, micron-sized PS@Ag-NPs core–shell microspheres were prepared with excellent SERS activity. After that, two simple protocols (Method I and Method II) were explored for the determination of thiram on apple epidermis. Findings: Based on our developed strategy of the single microsphere SERS technique, we successfully fabricated uniform PS@Ag-NPs substrate with high SERS activity and excellent detection sensitivity. The single microsphere SERS technique possesses the capability of anti-dilutability and the utilization of ultra-low PS@Ag-NPs microsphere dosage, realizing qualitative and quantitative detection of thiram on apple with detection limits far below the standard stipulated by China and the European Union.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yan Zhang,Qiang Liu,Wei Ma,Hanxiao Liu,Jingwen Zhu,Likai Wang,Hongchang Pei,Qinze Liu,Jinshui Yao
Facile fabrication of the ultra-high-performance adsorbent can effectively ameliorate the Cr(VI)-pollution elimination in sewage control. Herein, a simple synthesis strategy is proposed to tap a versatile chelating resin poly(pyrogallol-tetraethylene pentamine) (PPTA) with respect to Cr(VI) removal from solution. Multiple changing factors which affect the adsorption behavior of PPTA are explored sequentially, such as initial pH, adsorbate concentration, adsorbent dosage, temperature, foreign ions, etc . The microstructure and functional mechanism of synthetic adsorbent are investigated systematically by means of various characterizations including TEM, EDS, FT-IR, XPS, etc . Consequently, the as-prepared PPTA-3 microsphere by reactant ratio of 1: 1 represents a brilliant synergistic adsorption and reduction result for Cr(VI) by the drastic electrostatic interaction of –NH 3 + and –OH 2 + groups, including satisfactory removal efficiency which closes to 100 % in low concentration, favorable specificity for the influence from coexistent ions (Mo(VI), Mn(VII), Cl - , Cr(III), etc ), and passable recyclability. Following the surpassingly fitting with Langmuir isotherm model, its maximum capacity reaches 714.29 mg g −1 at 30 °C. The removal performance is essentially in agreement with the pseudo-second-order kinetics, simultaneously, suffers the rate-limiting impact depending on intra-particle diffusion process. In brief, this newly developed chelating resin presents an effective means with regard to the Cr(VI)-wastewater treatment or other uses in the future.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Saisai Jiao,Jie Liu,Jialong Sun,Yunwei Chang,Siwei Wang,Shijie Dai,Ruimin Xu,Menghua Dou,Qianjin Li,Jing Wang,Jianlin Li
A highly sensitive and reproducible multiplex mycotoxin SERS array has been established based on gold nanoparticles (AuNPs)-loaded inverse opal silica photonic crystal microsphere (SIPCM). Three types of Raman nanotags were synthesized by covalently grafting different antibodies and non-covalently loading different organic dyes onto the AuNPs for coding corresponding mycotoxins. To enhance Raman signal, AuNPs were loaded on the surface of SIPCM to create hot-spots once the Raman nanotags came closely. The maximal electric field enhancing effect in SIPCM with AuNP dimer could reach to 8 times. The assay principle was based on the competition immunoassay between the mycotoxins in sample and the artificial antigens immobilized on the surface of SIPCM. The three Raman nanotags could be integrated into an array to qualitatively and quantitatively detect multiplex mycotoxins in a sample. Such SERS-based assay displayed wide linear detection ranges of 0.001–10 ng/mL for ochratoxin A (OTA), 0.001–10 ng/mL for fumonisin B 1 (FB 1 ), and 0.1–1000 ng/mL for deoxynivalenol (DON), and low limits of detection (LOD) of 2.46 pg/mL for OTA, 0.20 pg/mL for FB 1 , and 68.98 pg/mL for DON. The recovery rates of the new method were measured to be 77.68–104.69% for OTA, 76.39–117.73% for FB 1 , and 70.95–113.16% for DON, in agreement with that of the classical ELISA method. The SERS-based method shows obvious advantages over fluorescence label or enzyme catalytic chemiluminescence methods , having a great application potential in rapidly screening multiplex mycotoxins in real samples.
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高影响因子
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