Results in Chemistry
·
2026
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IF 5.8
Yige Yan,Ming Fu,Jiaqi He,Dawei He,Yongsheng Wang
The practical application of aqueous supercapacitors is constrained by the balance between cycle life and power characteristics. This study develops a composite electrode based on hexagonal boron nitride/carbon nanotubes (h-BN/CNTs), featuring fabrication processes through thermal annealing and electrostatic assembly. The material ingeniously combines the chemical inertness and structural stability of h-BN with the conductive network of CNTs, successfully constructing an electrode with highly stable mechanical and electrochemical interfaces. The assembled symmetric supercapacitor demonstrates excellent long-term operational reliability, maintaining over 90% stability after 10,000 charge-discharge cycles while exhibiting outstanding rate performance. The core value of this work lies in its application to h-BN platforms for high-power, high-frequency optical devices, successfully transforming it into a high-performance electrochemical energy storage component. The material has a high power density of 600 W/kg and a fairly good energy density of 13.6 Wh/kg in the symmetric two-electrode test. This device construction strategy based on a unified core material system creates compatibility advantages for material substrate and process-level integration with high-power optical devices, providing a material foundation for developing next-generation optoelectronic integrated systems.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Huiying Ouyang,Weifeng Li,Yumei Long
Since dopamine (DA) is one of the central neurotransmitters and plays an important role in the human metabolism, its accurate detection is crucial for the diagnosis of DA-linked diseases. Herein, we demonstrated a novel electrochemical sensor for DA detection based on carbon-doped hexagonal boron nitrogen (C-hBN). C-hBN was prepared via a thermal polymerization process using melamine borate as a precursor. The successful C-doping was evidenced by fourier transform infrared (FTIR), photoluminescent (PL) and x-ray photoelectron spectroscopy (XPS). The carbon-doping can increase reactive sites and facilitate electrons transfer in h-BN, which was confirmed by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The C-hBN modified glassy carbon electrode (C-hBN/GCE) exhibited the enhanced electrocatalytic activity toward DA redox, whose CV peak current is 2.8 and 4.3 times higher than those of pure h-BN modified and bare GCEs, respectively. Based on CV method, the C-hBN/GCE presented a low detection limit of 5.8 nM (S/ N = 3) and a sensitivity of 2037 µA•mM•cm −2 . The linear response ranges were over the DA concentrations of 0.01–40 µM and 40–300 µM, respectively. In addition, the sensor was applied to detect DA in real samples including human serum and urine, and satisfactory results were achieved. The results suggested that the defect-engineered h-BN holds great potential for the development of electroanalytical devices with high-performance.
研究领域:
分析化学
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材料科学
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电化学
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生物传感器
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高影响因子
CERAMICS INTERNATIONAL
·
2014
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IF 2.086
Yin Xu,Tianyu Ma,Xinhua Wang,Yinzhu Jiang,Mi Yan
Influences of ZrO 2 additive on the microstructure and high temperature oxidation behavior of h-BN/ZrO 2 composites have been investigated. In addition to the enhanced strength , the oxidation reaction between boron and oxygen can be effectively hindered even at 1200 °C when adding 20 wt% ZrO 2 into the h-BN matrix. Besides the doped ZrO 2 particles, ZrB 2 and ZrB were also formed in the composites after sintering via the reaction between ZrO 2 and h-BN. The oxidation product ZrO 2 of these Zr–B compounds can act as protective layer during oxidation, which covers the sample surface and prevents further penetration of oxygen. Good oxidation resistance at 1200 °C and high strength make h-BN/ZrO 2 composites promising materials for high temperature applications.
研究领域:
材料科学
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高温材料
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·
IF 3.8
Jianning Zhang,Yanpei Dang,Tianhao Li,Yangzhong Zhao,Liantai Duan,Ke Chen,Xiao Zhang,Hengli Duan,Wensheng Yan,Sihua Feng,Gang Shao,Zhaoju Yu,Qing Huang,Yujie Song
Silicon boron carbonitride (SiBCN) ceramics have garnered significant attention due to their exceptional high-temperature stability, resistance to creep, and favorable electrical properties. However, the ceramicization mechanism of covalently bonded boron atoms in polyborosilazane (PBSN), which is crucial in determining the structural and crystalline phase evolution of silicon boron carbonitride (SiBCN) ceramics through the polymer-to-ceramic process, still needs further clarification for the design of advanced ceramics. Therefore, PBSN precursors constructed with B–C bonds were systematically investigated in the polymer-to-ceramic conversion process. B–C bonds were transformed into B-N bonds between 300°C and 600°C, ultimately resulting in the formation of h-BN at high temperatures. Meanwhile, higher levels (8.11–14.12%) of B facilitated the formation of SiC at equivalent temperatures but hindered the formation of Si 3 N 4 crystal nuclei. That is due to the formation of B–N and NB 3 units, which inhibited the formation of Si–N bonds and SiN 4 units, thereby interfering with the nucleation process of Si 3 N 4 and facilitating the crystallization of SiC. This study offers valuable insights for regulating the microphase evolution and properties of PDC nanocomposites.
研究领域:
材料科学
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陶瓷材料
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聚合物衍生陶瓷
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固态化学
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高温材料
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高影响因子
ACS Applied Materials & Interfaces
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2024
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IF 8.3
Xiaoxiao Wang,Yanmei Yang,Zhiqing Zhou,Yuling Zhong,Miaomiao Qin,Weiqing Wang,Weifeng Li,Bo Tang
5-hydroxymethylfurfural (HMF) is one of the most promising biomass-based chemicals that is used to produce many kinds of important compounds. Especially, the selective conversion of HMF to 5-hydroxymethyl-2-furancarboxylic acid (HMFCA), an important chemical feedstock, has high industrial significance but is technically challenging. In this study, we present a high-performance photocatalyst for selective oxidation of HMF to HMFCA. By integrating an ultrasmall amount of palladium (Pd) nanoclusters (1.12‰ in weight) on defective hexagonal boron nitride nanosheets (Pd/defective h-BN nanosheets (dh-BNs)), outstanding photocatalytic performance can be achieved, resulting in up to a 95% HMF conversion ratio with an 82% HMFCA selectivity. The performance is considerably higher than that of pristine dh-BNs and Pd on defect-free h-BNs. More importantly, this Pd/dh-BNs catalyst maintains a high catalytic activity after eight cycles, demonstrating robust catalytic stability. Density functional theory calculations indicate that Pd/dh-BNs can lower the energy barrier for HMF oxidation and facilitate the desorption of HMFCA, which contributes to the high selectivity catalytic performance. This study not only introduces a promising photocatalyst for sustainable chemical transformations but can also provide valuable insights into the design of advanced photocatalytic material for biorefinery applications.
研究领域:
材料科学
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化学工程
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环境科学
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PubMed
高影响因子
ACS Omega
·
2023
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IF 4.1
Weijun Xie,Yue Zhang,Lei Xu,Dan Xie,Li Jiang,Yanmao Dong,Yan Yuan
In this study, upconversion nanoparticles (UCNPs) with a flower-like morphology were prepared using a urea coprecipitation method. A ternary photocatalyst was first prepared using a solvothermal method involving the use of titanium oxide (TiO2), hexagonal boron nitride (h-BN), and UCNPs (Y2O3, Yb3+, and Tm3+) as raw materials. The surface morphology, crystal structure, and functional groups of these materials were then characterized and analyzed through scanning electron microscopy, transmission electron microscopy, X-ray diffraction analysis, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectrophotometry, and other techniques. Photocatalytic experiments were also conducted to investigate the effects of different catalyst types, raw material doping ratios, pH values, and catalyst quantities on the photocatalytic degradation of rhodamine B (RhB). The results indicated that doping with h-BN and UCNPs reduced the band gap width of RhB, increased its light absorption rate, and decreased the recombination rate of its photogenerated electrons and holes so that the photocatalytic degradation effect reached 100% within 2 h. After five experimental cycles, the 30% UC-BN-Ti photocatalyst remained highly durable and stable. To investigate the effects of different trapping agents on the degradation of RhB, benzoquinone, isopropanol, and ethylenediaminetetraacetic acid disodium salt were used as free-radical-capturing agents. The results indicated that •O2– was the primary active species in the degradation process. Finally, the pathway and mechanism of the degradation of RhB through ternary composite photocatalysis were identified.
研究领域:
材料科学
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环境科学
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光催化技术
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PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Ligang Ma,Yihuan Ding,Chao Lin,Yuqing Yang,Le Xu,Hui Qiu,Huilin Jiang,Xiang Song,Xiaoqian Ai
The photo-corrosion issue inherent in metal sulfide semiconductors is quite pronounced, making the enhancement of electron-hole pair separation efficiency in these photocatalysts a pivotal strategy for boosting photocatalytic hydrogen production. This study introduces a novel approach where hexagonal boron nitride ( h -BN) acts as a substrate for the in situ growth of ZnIn 2 S 4 nanostructures, resulting in the formation of h -BN@ZnIn 2 S 4 (BN@ZIS) nanocomposites. The electronegativity of h -BN nanosheets is harnessed to facilitate the recombination or electrostatic attraction of photogenerated holes in the ZnIn 2 S 4 photocatalyst. This strategy effectively promotes the separation of photogenerated electron-hole pairs, which is crucial for enhancing photocatalytic performance. The microstructure, morphology and optical properties of BN@ZIS nanocomposites were meticulously investigated. The findings reveal that the incorporation of h -BN nanosheets loads to a more uniform dispersion of the ZnIn 2 S 4 nanostructure, which not only increases the specific surface area but also fosters a tight heterojunction interface between h -BN and ZnIn 2 S 4 . In conclusion, the photocatalytic hydrogen production capabilities of the BN@ZIS nanocomposites were rigorously evaluated. Pure h -BN lacks photocatalytic hydrogen production activity. Conversely, the optimized BN@ZIS composite demonstrated a remarkable enhancement, exhibiting a photocatalytic efficiency that is 9.65 times greater than that of pristine ZnIn 2 S 4 . Furthermore, a plausible mechanism by which BN@ZIS augments photocatalytic hydrogen production has been proposed. This strategy, leveraging the synergistic interaction between h -BN and ZnIn 2 S 4 , is anticipated to be applicable to other semiconductor systems, opening avenues for the advancement of photocatalytic technologies.
研究领域:
材料科学
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能源化学
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2023
·Vol. 38
·期 4
·803-806
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IF 1.6
Ma Liang,Hu Yucheng,Zhou Zeyi,Zhu Bo,Zheng Wenjie,Zhang Rui
We reported a low-cost and easy-to-make method to effectively generate quantum dot (QD) states in 2D hBN films for quantum emissions at room temperature by utilizing silica nanospheres, in comparison with the sophisticated nanofabrication method reported in previous studies. The QDs created in 2D hBN films using silica nanospheres exhibit pronounced photon emissions with a good photo-stability in air, a narrow distribution of the emission peaks within the range of 580–620 nm, and a directional emission pattern, behaving as a single electric dipole. Our work develops the method of controllable fabrication of quantum emitters in 2D materials by using nano materials and structures.
研究领域:
量子光学
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纳米光子学
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材料科学
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二维材料
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应变工程
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高影响因子
WEAR
·
2026
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IF 6.1
Dapeng Gu,Hao Xu,Ke Liu,Chenxi Suo,Junqi Ge,Suwen Chen
To achieve the low-temperature combination of ceramics and polymers, the core-shell structure and cold sintering method are employed to prepare ceramic/polymer composites. An easy-bonding Silica (SiO 2 ) shell was introduced onto the surface of the hard-bonding Hexagonal boron nitride (h-BN) core by a sol-gel method to fabricate a core-shell structured h-BN@SiO 2 composite. Polyether ether ketone (PEEK) was subsequently filled into h-BN@SiO 2 to prepare h-BN@SiO 2 /PEEK ceramic composite by a cold sintering method. The effects of PEEK content (20 vol%, 35 vol%, and 50 vol%), sintering temperature (205 °C, 245 °C, 285 °C, and 325 °C), and molding pressure (350 MPa, 450 MPa, and 550 MPa) on the dry tribological properties of h-BN@SiO 2 /PEEK ceramic composites against GCr15 bearing steel were investigated using a ball-on-disc contact configuration. Field emission transmission electron microscopy (TEM), Energy dispersive spectrometer (EDS), Field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectrometer (FTIR) were used to characterize and analyze h-BN@SiO 2 or h-BN@SiO 2 /PEEK ceramic composites. The results indicate that h-BN@SiO 2 /PEEK composite exhibits better tribological performance when fabricated with a PEEK content of 35 vol%, a sintering temperature of 285 °C, and a molding pressure of 450 MPa under the investigated conditions. The formation of a stable and continuous mixed lubrication layer composed of h-BN, PEEK, and SiO 2 is identified as the primary factor contributing to the enhanced friction reduction and wear resistance. Under the investigated conditions, the main wear mechanisms observed in h-BN@SiO 2 /PEEK composites are adhesive wear, fatigue wear, and slight abrasive wear.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2021
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IF 3.315
Xiaoyu Zhang,Juan Yi,Yanan Yin,Yiheng Song,Chuanxi Xiong
In recent years, with the increasing demands of portable and high-speed electronic devices, highly integrated equipment attracts people's attention more and more. However, it is a great challenge to guarantee the long-term stability of electronic products at high temperatures. Hexagon boron nitride (h-BN), which owned excellent thermal conductivity and insulation properties , was preferred for electronics. For better compatibility of inorganic fillers and silicone rubber, a biological modification by coating polydopamine (DA) on h-BN was adopted. Herein, the composites based on h-BN@PDA and silicone rubber were fabricated. Compared with h-BN/silicone rubber composites , the thermal conductivity of h-BN@PDA/silicone rubber composites increased and volume resistance of materials had been decreasing. When the amount of h-BN@PDA fillers was 30 wt%, the thermal conductivity of h-BN@PDA/silicone rubber composite increased to 0.95 W m −1 K −1 . The volume resistivity of 30 wt% h-BN@PDA/silicone rubber composite reached 2.5 × 10 11 Ω·cm, which was the lowest one among others, which still exceeded requirements of electronic materials.
研究领域:
材料科学
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电子工程
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高影响因子
WEAR
·
2023
·
IF 5
Yuankai Zhou,Zhiyong Wang,Xue Zuo
Babbitt alloy, the common material of the main bearing of marine diesel engines , is prone to adhesive wear in the running-in process. It will shorten the service life and affect the stability of the bearing. To improve the running-in quality of Babbitt alloy, the hexagonal boron nitride (h-BN) was used as a lubricating oil additive. The running-in test was conducted by adding the h-BN with a particle size of 0.1 μm, 0.5 μm, 1 μm, and 5 μm into the base oil. The friction coefficient , wear topography, and recurrence parameters were used to assess the effect of h-BN on running-in quality. The results show that h-BN can reduce friction coefficient , enhance the stability of the friction system and improve surface quality after the running in. The h-BN with large particle size mainly plays the micro-bearing, interlayer sliding, and polishing effects. The h-BN with small particle size plays the micro-bearing, moderating impact, and surface mending effects. According to the actual conditions, one can select the appropriate particle sizes to improve running-in quality.
研究领域:
材料科学
·
机械工程
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高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Zhao Jun,Deng Nengmei
The thermal decomposition performance of an oxidizer directly determines the thrust and specific impulse properties of the solid propellant. Hexagonal boron nitride (h-BN) has the characteristics of high catalytic activity and good stability, which can improve the heat release and decomposition temperature of the oxidant, and then improve the energy performance of the propellant. In this study, a novel hybrid material TiO2 NPs/h-BN was successfully prepared by in situ growth, and it was found that when 5 wt.% TiO2 NPs/h-BN was added, the initial decomposition temperature of ammonium perchlorate (AP) decreased by 67.6°C. Due to the addition of TiO2, the gap between the h-BN layers as well as the specific surface increased, which optimized its thermocatalytic performance, and it also proposed a catalytic mechanism for the thermal decomposition process of AP.
研究领域:
材料科学
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催化化学
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PubMed
高影响因子
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