MICROCHEMICAL JOURNAL
·
2023
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IF 4.8
Xiwen Li,Zuan Yang,Peiran Meng,Shipeng Jiang,Mingyang Sun,Xiaoyu Zhang,Yue Sun
An ultrasensitive electrochemical sensor for phospholipase C (PLC) was developed via dual signal amplification based on metal-free visible-light induced atom transfer radical polymerization (MVL ATRP) and Ag nanoparticles (AgNPs). The environment-friendly MVL ATRP method was used to form aldehyde based polymers on the electrode surface, providing more reaction sites for further silver mirror reaction. In addition, a large number of electrically active AgNPs were obtained through efficient and low-cost silver mirror reaction, which improved the detection signal. Under the optimal conditions, the proposed sensor showed a linear response from 1 mU/L to 10 6 mU/L for PLC with a detection limit of 0.1032 mU/L (S/N = 3). Most importantly, the sensor was successfully applied to detect PLC in non-tumor cells (MCF-10A) and tumor cells (MCF-7, MDA-MB-231). The obtained values had no obvious difference with that determined by commercial ELISA kit. When 0.5–10 U/L standard PLC were added into the above cells extracts, the recovery rate was between 96.1% and 102.9%, and the RSD was less than 4.02%. The results showed that the fabricated PLC sensor had acceptable potential in clinical applications.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Pengfei Wu,Zian Jia,Chao Liu,Changqing Guo,Binbin Xu,Anhua Liu,Ling Li
Silicon/carbon (Si/C) composites have emerged as promising anode materials for next-generation lithium-ion batteries (LIBs) due to their high power and energy density, but managing the stress resulting from the large volume change of Si during charging and discharging remains a major challenge. To address this issue, we present a novel microsized porous Si/C-based anode design (AC_Si/C) that incorporates Si@C core–shell nanoparticles and hollow carbon nanospheres as deformable cushions fabricated using a scalable microemulsion approach. Our hybrid anode material system offers high ion and electron conductivity and efficient stress mitigation via the deformable hollow carbon nanospheres, resulting in improved cycling and rate performance. Finite element simulations reveal the stress mitigation mechanisms of the hollow carbon nanospheres, and the AC_Si/C nanostructure exhibits a high reversible specific capacity (855.3 mA h g–1 at 2 A g–1 over 500 cycles) and good capacity reservation for rate performance tests under various current densities. The microemulsion-based synthesis method enables large-scale production of porous Si/C nanocomposites as high-performance commercial anode material systems, demonstrating the potential of this air cushion-inspired design for the development of next-generation high-performance LIBs.
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JOURNAL OF POWER SOURCES
·
2021
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IF 9.127
Qiannan Zhou,Wei Li,Mengyou Gao,Huizhong Xu,Yu Guo,Lei Sun,Dehua Zheng,Jianjian Lin
Metal-organic frameworks (MOFs), as 3D porous precursors, have demonstrated great potential as electrode materials for lithium storage on account of high specific area and tunable structure. To enhance the intrinsic performance and endow MOFs with versatility, constructing distinctive morphology of MOFs while maintaining their porous structure to satisfy various application is highly desirable. Herein, we successfully developed a facile strategy for rationally designing and synthesizing the morphology of MOFs from circular plate shape to truncated octahedron gem shape via regulating the ratio of Pluronic F127 to terephthalic acid . In addition, the as-prepared Pluronic F127-regulated Ti-based MOFs (F-MIL-125-Ti) sacrifice as precursor to derive 3D mesoporous titanium dioxide (TiO 2 ) and as template for in situ growth of molybdenum disulfide (MoS 2 ) nanosheets to prepare a truncated octahedron TiO 2 @C@MoS 2 hierarchical composite. As expected, the distinctive 3D hierarchical TiO 2 @C@MoS 2 electrode exhibits superb rate capability (775 mAh g −1 at 5 C) and outstanding cycling stability (822 mAh g −1 after 1000 cycles at 1 C), which is benefiting from the 3D mesoporous TiO 2 and synergies between TiO 2 and MoS 2 nanosheets. This work develops new insight to design novel and controllable morphology MOFs-derived materials for application of energy storage devices.
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ChemCatChem
·
2021
·Vol. 14
·期 4
·e202101523
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IF 5.686
Yanping Liu,Bin Qiao,Nan Jia,Shufeng Shi,Xinbing Chen,Zhongwei An,Pei Chen
Graphical Rechargeable batteries : N-doped carbon nanoflower with embedded Fe 3 O 4 −Vo nanoparticles was successfully prepared by a facile and scalable method. This material which showed excellent ORR/OER activity and performance in zinc-air battery. Experiment and density functional theory results demonstrate that the high catalytic activity is primarily due to the surface oxygen vacancy of Fe 3 O 4 nanoparticles. The development of low-cost, high-activity bifunctional oxygen electrocatalysts for rechargeable zinc–air batteries is highly desired. Herein, N-doped carbon nanoflower embedded Fe 3 O 4 nanoparticles were prepared using a simple and scalable method. The obtained electrocatalyst exhibits excellent activity and stability toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), as well as a small potential gap of 0.72 V between the half-wave potential of ORR and the onset potential of OER potential, which is superior to the most previously reported bifunctional ORR/OER catalysts. The corresponding zinc–air battery exhibits good charged/discharge cycle performance as well as excellent discharge property, with a power density of 136.8 mW cm −2 at 200 mA cm −2 outperforming commercial Pt/C (96.5mW cm −2 ). Experiment results and density functional theory demonstrate that the high catalysis activity is mainly caused by the surface oxygen vacancy of Fe 3 O 4 nanoparticles. This study sheds new light on the ORR/OER bifunctional electrocatalyst design.
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Acta Metallurgica Sinica-English Letters
·
2021
·Vol. 35
·期 5
·790-800
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IF 2.755
Yang Wei,Qiu Xiulian,Wang Chengyun,Ye Jinhao,Zhu Jihua,Zou Hanbo,Chen Shengzhou
An environmentally friendly method for the synthesis of LiMnPO 4 /C anode material for lithium-ion batteries by solvothermal method is introduced. The modification of the morphology of this precursor is altered by changing the ratio of the conditioning solvent (water-ethylene glycol solution) and the order of material addition. Ethylene glycol (EG) exerts a considerable influence on synthesizing LiMnPO 4 /C flake-like nanocrystal, which benefits the extraction/insertion reaction of lithium ions and improves the electrochemical activity and electrochemical performance of LiMnPO 4 /C material. When the solvent composition is H 2 O:EG = 1:3, exhibiting exceptional charge/discharge performance and rate capability, the specific discharge capacities are 155.8, 153.7, 148.8, 141.4, 129.5, and 112.6 mAh g −1 at the 0.1, 0.2, 0.5, 1, 2, and 5 C rates, respectively. When the charge–discharge rate returns to 0.1 C, the LiMnPO 4 /C material shows a reversible discharge specific capacity of 153.7 mAh g −1 . Differential scanning calorimetry (DSC) tests verify that the thermodynamic stability of the prepared LiMnPO 4 /C(LMP) and commercial LiFePO 4 (LFP)materials is better than that of commercial nickel–cobalt-aluminum (NCA) ternary materials. These prepared LiMnPO 4 /C composites have high electrochemical capacity and cycle stability.
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APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Tao Ke,Shuyi Shen,Kun Yang,Daohui Lin
Developing visible-light-driven photocatalysts with high charge separation and transfer efficiency to degrade organic pollutants in wastewater remains a major issue. In this work, quaternary Bi 2 O 3 /C 3 N 4 /TiO 2 @C (BCTC) hybrids were successfully fabricated by hydrothermal and calcination two-step method using Bi(NO 3 ) 3 ·5H 2 O, C 3 N 4 , and Ti 3 C 2 as precursors. The optimized BCTC hybrids with the dosage of 1 g L −1 (BCTC-2%) exhibited high photocatalytic activity, degrading 100% sulfamethoxazole (SMZ, 5 mg L −1 ) within 100 min under visible light irradiation. Moreover, the photocatalytic degradation rate of SMZ by the quaternary junction was found to be 5.12-, 2.87-, and 1.35-fold higher as compared with Bi 2 O 3 /C 3 N 4 , C 3 N 4 /TiO 2 @C, and Bi 2 O 3 /TiO 2 @C junctions, respectively. The enhanced photocatalytic performance of BCTC hybrids could be attributed to the formation of a double Z-scheme photocatalytic system and the photosensitization of Bi 2 O 3 and C 3 N 4 . The photogenerated hole (h + ) was the primary reactive species that degraded SMZ. The plausible intermediates during the photocatalytic degradation of SMZ were identified by high-performance liquid chromatography quadrupole time-of-flight tandem mass spectrometry and the degradation pathway was postulated. Importantly, BCTC-2% had a good photocatalytic activity for degrading SMZ in natural water samples, indicating the high potential of BCTC hybrids for wastewater treatment applications.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Shaoxiong Liu,Xiao Li,Siwei Zhong,Wenjia Jiang,Ye Liu,Wenchong Ding,Hai Hu,Zhifeng Huang,Li Liu
NASICON-structured Ti-based polyanion compounds benefit from a stable structural framework, large ion channels, and fast ion mobility . However, the large radius of potassium and its poor electronic conductivity restrict its use in potassium-ion batteries. Herein, hierarchical mesoporous Mn 0.5 Ti 2 (PO 4 ) 3 @C microspheres have been successfully synthesized using a simple electrospraying method. These microspheres consist of Mn 0.5 Ti 2 (PO 4 ) 3 nanoparticles evenly embedded in three-dimensional mesoporous carbon microspheres. The hierarchical mesoporous micro/nanostructure facilitates the rapid insertion and extraction of K + , while the three-dimensional carbon microspheres matrix enhances electrical conductivity and prevents active materials from collapsing during cycling. So the hierarchical mesoporous Mn 0.5 Ti 2 (PO 4 ) 3 @C microspheres exhibit a high reversible discharge specific capacity (306 mA h g −1 at 20 mA g −1 ), a notable rate capability (123 mA h g −1 at 5000 mA g −1 ), and exceptional cycle performance (148 mA h g −1 at 500 mA g −1 after 1000 cycles). The results show that electrosprayed Mn 0.5 Ti 2 (PO 4 ) 3 @C microspheres are a promising anode for PIBs.
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PubMed
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
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IF 6.4
Bo Dong,Chengji Deng,Jun Ding,Hongxi Zhu,Qian Wang,Yong Zhang,Chao Yu
In this investigation, we have employed a novel approach to fabricate β–Sialon/Ti(C, N) composites through the nitridation treatment of Ti 3 SiC 2 powder. At temperatures ranging from 1373 to 1773 K, the reaction process was subjected to a comprehensive analysis to explore the transformation of phase and microstructure. The findings unequivocally highlight the influence of α–Al 2 O 3 presence and the high specific surface area of Ti 3 SiC 2 powder, resulting in distinctive phase and structural evolutions post nitridation, distinctly different from those observed in bulk Ti 3 SiC 2 . The β–Sialon/Ti(C, N) composites produced via this innovative method exhibit uniform local chemical composition and meticulous regulation of grain morphology. Moreover, the synthesis mechanism of β–Sialon/Ti(C, N) composites under nitrogen ambiance was thoroughly discussed. This straightforward approach has the potential for extensive–scale synthesis of β–Sialon/Ti(C, N) composites, offering promising avenues for their application in developing high–performance refractories or structural ceramics tailored to withstand severe high–temperature environments.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Hongju Lin,Fanhui Liao,Yanchang Chu,Mingyu Xie,Lun Pan,Yuanyuan Wang,Lijian Leng,Donghai Xu,Le Yang,Gangfeng Ouyang
Honeycomb NiCo/C-Na catalyst featured with a micro- meso -macroporous structure is fabricated and shows a significantly higher catalytic activity for decarboxylation of fatty acid compared to a series of other carbon-based catalysts. A 100 % conversion of stearic acid and a C15-18 alkane total yield of 70 % is achieved at 280 °C for 3 h under 1 MPa H 2 with heptadecane as the main product. NiCo/C-Na also achieves a complete conversion of monoglyceride into heptadecane when using edible oil as reactant. The catalyst is further evaluated for upgrading of sludge HTL bio-crude and proves to be highly efficient. The obtained upgraded biofuel exhibits a decreased viscosity and an increased density. Specifically, the higher heating value (HHV) increases to 47.32 MJ/kg. This result is attributed to the easier desorption of CO 2 , better H 2 activation capacity and the unique hierarchical pore structure of the catalyst, which allows faster mass transfer and reaction rate.
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高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Xiaoqing Liu,Guangshe Li,Xin Zhang,Jinjiang Wu,Chuang Yu,Linfeng Peng,Dan Zhang,Liping Li
Vanadium-based compounds have earned incremental attention as cathode for aqueous zinc ion batteries (AZIBs) due to their ideal electrical conductivity , rich valence states and flexible crystal structures. Unfortunately, their storage mechanisms are confusing and not well-established, especially for nitride . Herein, we have constructed a cubic vanadium nitride and nitrogen/sulfur doped carbon composite (VN@N/S–C) as a cathode for AZIBs. An in-depth examination of ex-situ XRD and XPS reveal that the electrochemical reduction during the first discharge process promotes a structural transformation of cubic VN to layered Zn 3+ x (OH) 2 V 2 O 7 ·2H 2 O, thus permitting subsequent insertion of Zn 2+ in such layered structure. Ex-situ SEM studies of electrodes further identify a morphology change of nanoparticles to nanosheets , corresponding to VN and Zn 3+ x (OH) 2 V 2 O 7 ·2H 2 O, respectively. New storage mechanism-the electrochemical reduction combined with the contributions from Zn 2+ (de)intercalation, furnishes the VN@N/S–C cathode a high discharge capacity of 232 mA h g −1 after 400 cycles at 4 A g −1 and good rate performance (252 mA h g −1 at 6 A g −1 ). Even at a low temperature of 0 °C, the cathode still delivers an excellent capacity of 361 mA h g −1 after 300 cycles at 1 A g −1 . This study offers a hint to improve the understanding on cubic structure for AZIBs.
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高影响因子
FOOD SCIENCE AND BIOTECHNOLOGY
·
2023
·
IF 2.9
Lee Jung-Soo,Ahn Jiwon,Han Jaejoon
Various edible polymers [sodium alginate, carboxyl methylcellulose, sodium oleate, liquid paraffin, pectin, pullulan, polyvinyl acetate, and shellac (SHE)] as potato-coating materials and their effect on extending the shelf life of potatoes when combined with an edible coating and UV-C irradiation treatments were evaluated. As a result of the characterization of the edible polymers, SHE was selected as the optimal coating material because it had the best moisture and light barrier properties. SHE coating successfully prevented the greening, respiration, and sprouting of potatoes caused by exposure to light and oxygen. Additionally, it reduced weight loss by inhibiting transpiration on the potato surface. While the SHE coating did not exhibit antimicrobial effects, a significant effect was observed when combined with UV-C irradiation. This study suggests the potential of combined treatment of SHE coating and UV-C irradiation in extending the postharvest quality of potatoes.
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PubMed
高影响因子
CARBON
·
2023
·
IF 10.9
Zhi Liu,Chenhui Liu,Yu Wang,Meiping Song,Jiancheng Guo,Wei Wang,Xueping Gao
Paper-based composite materials exhibit a marked tendency towards thinner and lighter profiles in the context of electromagnetic interference (EMI) shielding. Carbon fiber paper (CFP) has excellent electrical conductivity and Lightweight base characteristics. However, its single electrical loss characteristic and uncontrollable EMI shielding performance are limited in application. Therefore, we prepared CFP@ graphene oxide (GO)/ZIF-67 composites by chemical bonding and in-situ polymerization, and then prepared CFP@rGO/Co/C composites with integrated structure and function by heat treatment. Layer-by-layer assembly technology was employed to develop composite materials with tunable EMI shielding performance. The composite material has excellent high conductivity (2475.86 S/m) and excellent EMI shielding performance (average X-band EMI efficiency (SE)38.46 dB, absolute shielding effectiveness (SSE/t) = 14388.56 dB cm 2 g −1 ). Through the layer-by-layer assembly technology, the EMI SE performance of the 7-layer assembled material reached 85.83 dB, and the EMI SSE/t reached 32110.51 dB cm 2 g −1 . Through simulation verification, the EMI shielding performance of the materials is compared, and ideas for EMI material design are provided. In addition, the material also has excellent Joule heating performance, fast electrothermal response and good temperature controllability. The material exhibits remarkable resilience against harsh environmental conditions, including strong acids, bases, organic reagents, ultrasonic waves, combustive processes, and extremely low temperatures. Despite these severe treatments, its performance remains above 90 % intact. This study proposes a magnetic-dielectric synergistic, performance-adjustable CFP-based shielding material, which has great application potential in the future wearable, defense, and aerospace fields.
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