NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 43
·期 22
·8613-8619
·
IF 3.069
Zizheng Ai,Bin Chang,Chengwei Xu,Baibiao Huang,Yongzhong Wu,Xiaopeng Hao,Yongliang Shao
Electrocatalysts with the advantages of stability, high efficiency, and noble-metal-free features are in urgent need for water splitting. Herein, for the first time, based on the interface engineering, a novel BNNS@Ti3C2 intercalation electrocatalyst was prepared via a controllable synthesis strategy. The rich active sites of Ti3C2 were better protected as well as were able to serve as a bridge to connect the different layers of BNNS. Furthermore, combining the first-principles calculations, the nature of the interface proved the transformation from semiconducting properties to metallicity in this unique intercalation structure. The as-obtained composite possessed improved conductivity and abundant catalytic active sites, exhibiting a low onset potential of 23 mV and overpotential of 52 mV (vs. RHE) at 10 mA cm−2 with outstanding stability. BNNS@Ti3C2 was used as an electrocatalyst for the first time without noble-metal assistance. This study demonstrates that the layered materials can serve as a promising electrocatalyst by interfacing with the intercalation structure.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 48
·e54722
·
IF 3
Jingxiang Wang,Min Li,Xunwei Liu,Jiangmin Yu,Dicheng Yang,Chunping Yuan,Xiaoying Yin,Yinan Yan
Magnetic hyperthermia generated by functionalized bone cement is a promising approach to treat postosteocarcinoma cancer regeneration. However, it is crucial to minimize the magnetic field intensity using localized high-caloric-generating nanoparticles to avoid the potential hazards of electromagnetic field exposure to living organisms. Herein, in situ hydrothermally synthesized CoFe 2 O 4 (CoFe) nanoparticles and boron nitride nanosheet (BNNS)–supported CoFe complexes (BNCoFe) are incorporated into polymethyl methacrylate (PMMA) cement to prepare a composite implant with high-intensity magnetic–thermal performance and safety. The results show that the CoFe nanoparticles (size = ~70 nm) anchored on BNNS surfaces exhibit a maximum magnetic–thermal ablation temperature of ~42°C within 50 s under an alternating magnetic field of 400 KHz (field frequency) and 30 Oe (field intensity) in vitro. Furthermore, the incorporation of BNNSs into the PMMA matrix notably increases the thermal conductivity of PMMA from 0.07 to 0.25 W mK −1 and improves its mechanical properties (compressive strength increases from 74.0 ± 1.6 to 81.0 ± 1.0 MPa), which is attributed to the crystalline structure of BNNSs in the PMMA matrix. Inductively coupled plasma analysis shows a considerably reduced Co 2+ ion release from PMMA/BNCoFe, indicating its potential as a safe implantation material for hyperthermia treatment.
研究领域:
生物医学工程
·
材料科学
·
肿瘤治疗
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Shan Wan,Huikai Chen,Xiaoze Ma,Lijuan Chen,Kang Lei,Bokai Liao,Zehua Dong,Xinpeng Guo
The 5-aminotetrazole@ZIF-7@zinc gluconate/boron nitride nanosheets (NZ/BNNS) nanocomposites were synthesized by a facile one-pot method for anticorrosive reinforcement of waterborne epoxy (WEP) coating. The electrochemical tests and scratch tests show that the incorporation of NZ/BNNS nanocomposite can significantly improve the corrosion protection performance of WEP coating by the synergetic effects of passive and active protection. The impedance modulus at 0.01 Hz of WEP NZ/BNNS coating is about 1–1.5 orders of magnitude higher than that of pure WEP coating during the 288 h immersion corrosion test. The enhanced passive protection mainly derives from the two-dimensional structure and impermeability of NZ/BNNS. NZ/BNNS nanocomposites can prolong the diffusion path of corrosive medium. UV–vis spectra indicate that 5-aminotetrazole inhibitor encapsulated in NZ is stimuli-responsively released under acidic conditions. After the intrusion of corrosive ions on Q235 carbon steel, the hydrolysis of iron ions induces local acidification. NZ nanocontainers dissociate under acidic condition and release the corrosion inhibitors . The adsorption of corrosion inhibitors on the substrate then provides the active protection. Relevant corrosion protection mechanism has been proposed.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Huakang Zhang,Qing Meng,Jiangtao Li
Novel one-dimensional nano-hierarchical structured SiC@BNNS composite powders were successfully synthesized through a one-step in-situ combustion synthesis in the Si-PTFE(Polytetrafluoroethylene)-B 4 C-N 2 system. The influence of Si content on the morphological evolution of the products was systematically investigated. The results demonstrate that the one-dimensional nano-hierarchical structure, featuring SiC nanowires as the axial framework and radially distributed hBN nanosheets, was successfully obtained at a molar ratio of Si/PTFE/B 4 C=4/1/1. Wettability tests revealed that the as-prepared SiC@BNNS powders exhibit excellent intrinsic hydrophobicity without surface modification, with a water contact angle of 145.2°. Surface research indicated that the composite powders exhibit a specific surface area of 120.97 m 2 /g. Furthermore, the methylene blue adsorption tests showed that the composite powders maintained over 98% removal efficiency through 10 consecutive adsorption-desorption cycles.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Xinpeng Chen,Aijing Li,Ping Yao,Jiapeng Wang,Tieling Xing,Guoqiang Chen
In this work, sea urchin-like magnetic Fe3O4@CA/BNNS/AgNP composite microspheres were successfully prepared. The photocatalytic performance of composite microspheres for the organic dye rhodamine B (RhB) was systematically investigated under different conditions, and the catalytic degradation rate of RhB was as high as 95% within 60 min; after three cycles of recycling, the degradation rate of RhB was reduced by only 8%. The main active agents in the reaction are e– and •O2–. Fe3O4@CA/BNNS/AgNP microspheres prepared in this study exhibit photocatalytic and electrochemical properties, making them easy to separate. This work is not limited to the development of Fe3O4-based catalysts but also is expected to provide ideas for the research and progress of photocatalytic composite catalysts with electrochemical properties.
研究领域:
材料科学
·
环境科学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Jiangang Zhou,Congzhen Xie,Rui Wang,Huasong Xu,Bin Gou,Licheng Li
Thermally conductive polymeric materials have attracted great interest from academia and industry for several decades. Herein, we report a facile method to fabricate BNNS/PP composites with excellent properties, especially the in-plane thermal conductivity . SEM and XRD results show the orderly dispersion and high orientation of BNNS along the in-plane direction. Attractively, the in-plane thermal conductivity of BNNS/PP composites after 20 times of folding and hot pressing is dramatically improved to 4.08 W/mk at a BNNS content of only 19.1 vol%, which is 20 times higher than that of pure PP and 480% higher than that of single hot pressing composite at the same filler content. In addition, The Hashin-Shtrikman (HS) model and finite element simulations are introduced to interpret the improvement of in-plane thermal conductivity of BNNS/PP composites after repeated hot pressing. Meanwhile, the influence of parallel orientation and layered distribution of BNNS on the mechanical and dielectric properties of BNNS/PP composites has been investigated. This facile method presents a novel approach to design and fabricate polymer composites with excellent in-plane thermal conductivity.
研究领域:
材料科学
·
热传导工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Xinyu Li,Junjun Shi,Jiangang Wang,Lei Xi,Rui Sun,Fan Zhang,Xi Wu,Zhiyong Zhou,Zhongqi Ren
Removal of sulfur-containing compounds from fuel oil is one of the effective ways to reduce the emission of harmful substances and is of great environmental importance. In this work, a novel cerium-vanadium bimetallic catalyst supported by boron nitride nanosheets (CeVO 4 /BNNS) is reported for the efficient removal of sulfur-containing compounds from diesel fuel through catalyzing the molecular oxygen in the air. The successful preparation of the CeVO 4 /BNNS catalyst was demonstrated by SEM, XRD, and BET characterization, while its conformational relationship was also revealed. Synergistic effect of CeVO 4 bimetallic oxide together with the strong affinity of BNNS for sulfur-containing compounds achieved the efficient removal of of 4,6-DMDBT (100 %), DBT (99.62 %) and BT (71.29 %) within 3 h. The structure of CeVO 4 /BNNS catalyst remained basically unchanged after six times recycle, and the desulfurization rate maintained above 91 %, indicating a good stability. What’more, the free radical scavenging experiments and the analysis of oxidation products revealed the possible reaction mechanism, i.e., the activation of molecular oxygen by CeVO 4 /BNNS catalyst generated superoxide radicals, which oxidized DBT to DBTO 2 .
研究领域:
催化
·
环境化学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Kaifeng Wang,Siyu Liu,Hua Li,Xinke Liu,Yingxia Liu,Hezhou Liu
Thermal interface materials (TIMs) with excellent thermal conductivity are urgently required to tackle serious heat accumulation issues within the miniaturized electronic devices in electronic packaging field. Constructing thermal conductive network can enhance the thermal conductivity of polymer-based TIMs, but significantly restricted by the filler content and the orientation, thereby limiting the directional heat transfer behavior. In this work, BNNS@PVA aerogel with anisotropic thermal conductive network is proposed by sequential synthesizing routines, including the construction of PVA aerogel template by directional freeze-drying, surface assembly of BNNS-OH on the skeleton by dip-coating, and the alignment of the interconnected thermal conductive network by salting-out treatment. The relationship between the thermal conductive network microstructure and the thermal conductivity performance of BNNS@PVA is investigated by physiochemical characterizations and finite element simulation. By optimizing the filler content and the salting-out conditions comprehensively, the resulting aerogel with well-aligned microstructure achieves thermal conductivity of 4.63 W m −1 K −1 and anisotropic thermal coefficient of 473. Besides, the heat dissipation, compressive, and dielectric properties of the aerogels are performed. This research provides a promising strategy to enhance thermal conductivity performance by controlling the anisotropic alignment of the thermal conductive networks effectively, presenting great potential in the advanced polymer-based TIMs.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Guangshun Dong,Zhuoqun Li,Jian Pan,Xinyu Chen,Xinyu Lou,Fulai Zhao,Yao Sun
With the development of industrialization, the discharge of oily wastewater has been increasing significantly. In this study, a novel bio-based oil–water separation membrane was developed using bio-based Polyamide 56 (PA56) as the matrix material, which was modified by incorporating hydroxylated boron nitride nanosheets (BNNS-OH) through a blending approach. The PA56/BNNS-OH composite nanofiber membrane was fabricated via electrospinning. The impact of adding BNNS-OH on the morphological structure, selective permeability, and oil–water separation performance of the composite nanofiber membrane was explored. The results showed that, the introduction of BNNS-OH increased the surface roughness of the nanofiber membrane, forming a micro-nano nodular structure. This not only significantly enhanced the membrane’s hydrophilicity but also endowed it with outstanding underwater superoleophobicity. The M−3 membrane, prepared with 5 wt% BNNS-OH relative to PA56 content, exhibited superhydrophilic/underwater superoleophobic properties. It demonstrated efficient separation performance for various types of surfactant-stabilized emulsions (SSEs), with a separation efficiency of 99.84% for n-hexane-based SSE, approaching complete separation. Moreover, the membrane exhibited excellent cycling and thermal stability, chemical resistance, and self-cleaning properties under complex conditions. This study provides new insights and methods for developing novel bio-based and environmentally friendly oil–water separation membranes, which hold significant potential for application in oily wastewater treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 8
·3687-3700
·
IF 4.5
Gu Siqi,Xie Ping,Hu Zuming,Yu Junrong,Wang Yan,Li Na
Because of excellent insulation properties and thermal stability, meta-aramid paper can be commonly applied to a vast number of fields, like power systems. But poriferous and relatively lax structure of meta-aramid paper would limit its applications in high-voltage environment. This paper proposes a sandwich structure design to combine PDA@BNNS/PMIA film and meta-aramid paper with high breakdown strength. After coating with 6 wt% PDA@BNNS/PMIA solution, this kind of paper became more compact, so there were few pores in the paper and it further enhanced the mechanical and dielectric performances of specimens. The tensile strength in the cross direction increased from 31.3 to 40.5 MPa, and the performance in the machine direction was from 75.5 to 78.9 MPa. Furthermore, the breakdown strength of compound-coated paper achieved 55 kV/mm, which is much higher than meta-aramid paper. Additionally, compound-coated paper still remained outstanding thermal stability. Overall, our fabricated PDA@BNNS/PMIA compound-coated paper has excellent comprehensive properties, which provides a broad prospect for the applications in high-temperature and high-voltage transformers.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Zhengyang Miao,Guangzheng Zhu,Lei Yang,Peng Ding,Fang Jiang
Polymer-based thermally conductive composites have garnered significant attention in recent years due to their critical applications in areas of national strategic importance. Nevertheless, the inherently limited thermal conductivity and mechanical properties of polymers pose challenges to their practical application. Recent research indicates that employing exogenous methods and facilitating molecular-level interactions between fillers and cross-linkers are effective strategies to overcome these limitations. In this study, with the aid of the ionic effect during the sol-gel phase transition of aqueous sodium alginate molecules in the presence of divalent cations and biaxial stretching, combined with the hydrogen bonding between boron nitride nanosheets (BNNS) with excellent thermal conductivity and sodium alginate (SA) molecules, the BNNS-calcium alginate (BNNS/Ca-SA/D) films were constructed by the strategy of gel reconstruction, rehydration, evaporation-assisted self-assembly and biaxial stretching. By designing anisotropic structures with closely aligned interconnected BNNS (Herman orientation parameter as high as 0.865), the BNNS/Ca-SA/D films with a BNNS loading of 40 wt% were characterized by high in-plane thermal conductivity (45.50 W•m −1 •K −1 ) and good mechanical properties. Combined with finite element analysis to simulate the heat transfer process, the “thermo-mechanical” coupled multilevel oriented structure composite films were constructed due to the densification arrangement and the increase of interfacial adhesion during multiple cross-linking processes, and the orientation arrangement of BNNS during the tensile-induced process. The potential of the BNNS/Ca-SA/D films developed in this study for thermal management applications has been demonstrated by the practical application of thermal management devices and the human body. The polymer-based thermally conductive films developed in this paper offer promising applications for thermal management systems in modern power electronics.
研究领域:
材料科学
·
热管理
·
聚合物复合材料
·
纳米材料
·
先进制造
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 23
·1880
·
IF 4.4
Xiaonan Li,Tong Qin,Wenxu Zhang,Hong Wang,Yanhong Chen,Kangle Li,Qing Wang,Yibo Wang
When the power converter connects to the high-frequency transformer breaks through the bottleneck and reaches a frequency of 100 kHz or even higher, the high-frequency transformer’s inter-turn insulation faces more serious high-frequency discharge and high-temperature problems. In order to improve the service performance of oil-immersed high-frequency transformer insulation paper, composite K-BNNS particles are prepared by ultrasonic stripping, heat treatment, and thermomagnetic stirring. Then, K-BNNS particles are mixed with PMIA (polymeric m-phenylenediamine solution) slurry to produce composite aramid paper. And the effects of K-BNNS particles with different contents on the thermal conductivity, dielectric properties, partial discharge properties, and mechanical properties of aramid paper are explored. It can be found that, when the addition of composite particles (K-BNNS) is 10%, the comprehensive performance of composite aramid paper is the best. Compared with Nomex paper, the in-plane and through-plane thermal conductivity of composite insulating paper F-10 increased by 668.33% and 760.66%, respectively. Moreover, the high-frequency breakdown voltage increased by 48.73% and the tensile strength increased by 2.49%. The main reason is that the composite particles form a complete thermal conductive network in the aramid paper matrix and a large number of hydrogen bonds with the matrix, which enhances the internal interface bonding force of the material and changes the charge transport mechanism.
研究领域:
材料科学
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）