Journal of Energy Chemistry
·
2020
·
IF 7.216
Zhongya Pang,Guangshi Li,Xingli Zou,Chenteng Sun,Conghui Hu,Wei Tang,Li Ji,Hsien-Yi Hsu,Qian Xu,Xionggang Lu
Porous active core-shell carbon material with excellent synergistic effect has been regarded as a prospective material for supercapacitors . Herein, we report an integrated method for the facile synthesis of carbide-derived carbon (CDC) encapsulated with porous N-doped carbon (CDC@NC) towards high-performance supercapacitors. Polydopamine (PDA) as nitrogen and carbon sources was simply coated on SiC nanospheres to form SiC@PDA, which was then directly transformed into CDC@NC via a one-step molten salt electro-etching/ in-situ doping process. The synthesized CDC@NC with hierarchically porous structure has a high specific surface area of 1191 m 2 g −1 . The CDC core and NC shell are typical amorphous carbon and more ordered N-doped carbon, respectively. Benefitting from its unique dual porous structures, the CDC@NC demonstrates high specific capacitances of 255 and 193 F g −1 at 0.5 and 20 A g −1 , respectively. The reaction mechanism of the electro-etching/ in-situ doping process has also been investigated through experimental characterizations and theoretical density functional theory calculations. It is suggested that the molten salt electro-etching/ in-situ doping strategy is promising for the synthesis of active core-shell porous carbon materials with synergistic properties for supercapacitors without the need for additional doping/activation processes.
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
·
2026
·
IF 4.7
Huimin Xie,Mengting She,Dan Zhang,Liping Chen,Dongjian Ding,Luoxin Wang,Hua Wang,Siwei Xiong
This work outlines a flexible skeleton-rigid enhancement strategy to meet the needs for low thermal conductivity, sound absorption, noise reduction, and electromagnetic wave transmission in aerospace, electronic communications, and energy vehicles. It involves creating high-aspect-ratio thermotropic liquid crystalline polyarylate (PAR) nanofibers via melt spinning and wet ball milling to form a customizable 3D network. Rod-shaped SiC particles are then interlocked with these nanofibers through high-speed shear, resulting in a uniform preform. Directional freeze-drying and heat treatment follow, inducing molecular chain relaxation and viscous flow on the PAR surface, forming an in situ diffusion bonding layer at the SiC-PAR interface for efficient coupling and structural reinforcement. The SiC/PAR nanocomposite aerogels feature 72% porosity and an ultralow density of 0.0428 g/cm3. Increasing the SiC content from 70 to 80 wt % boosts its maximum stress by 32.3%. It offers excellent thermal stability at 250 °C, a low thermal conductivity of 0.035 W m–1 K–1, and a sound absorption coefficient of 0.34 in the 0–5500 Hz range. It also maintains strong electromagnetic wave transmission from 9 to 12 GHz. This makes it suitable for multifunctional uses in thermal insulation, sound absorption, and electromagnetic wave transmission.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2026
·
IF 6.6
Chen Lin,Jiabin Lu,Qiyuan Wu,Xiaolan Xiao
Fabricated a broad-spectrum responsive AgCl@Ag photocatalyst with SPRE. • AgCl@Ag exhibits 2.4-fold higher MRR than TiO 2 under visible light. • Revealed SPRE-enhanced ·OH generation and synergistic removal mechanism. To overcome the ultraviolet (UV) light limitation of conventional TiO 2 -based photocatalysis-assisted polishing, AgCl@Ag composite particles with surface plasmon resonance effect (SPRE) were prepared via a precipitation-chemical reduction method. Their morphology, phase composition, surface chemistry, and optical absorption were characterized by SEM, XRD, XPS, and UV–Vis. Photocatalytic activity and polishing performance on single-crystal SiC were systematically compared with commercial TiO 2 under both UV and visible light. The AgCl@Ag particles showed uniform size, regular morphology, no surface impurities, and broad-spectrum absorption. Under UV light, both AgCl@Ag and TiO 2 achieved >90% methyl orange degradation within 30 min, with comparable polishing performance: AgCl@Ag yielded an MRR of 86.7 nm·h −1 and a surface roughness Sa of 3.25 nm, versus 77.0 nm·h −1 and 3.28 nm for TiO 2 . Under visible light, significant differences emerged. TiO 2 degraded only 13% of methyl orange in 30 min, with an MRR of 22.8 nm·h −1 and Sa of 6.78 nm. In contrast, AgCl@Ag achieved >55% degradation, an MRR of 55.0 nm·h −1 , and Sa of 4.93 nm under the same conditions. The SPRE of AgCl@Ag promotes photogenerated charge carrier separation, enabling ·OH radical generation that synergistically forms and mechanically removes the surface oxide layer on SiC. Download: Download high-res image (250KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2026
·
IF 8.6
Lulu Diao,Zhaobo Tian,Shaobo Zhang,Zhaorui Li,Jian Zhao,Zhanglin Chen,Jie Zhang,Lu Liu,Xiang Li
Engineering hierarchical mesopores in SiC/C microspheres via selective oxidative etching for tuned pore architecture. • Achieving near-electrical-insulation (2 wt% carbon) without sacrificing Ku-band absorption performance. • Realizing an exceptional RL min of −37.21 dB and ultrabroad EAB of 4.55 GHz at merely 2.4 mm thickness. • Demonstrating that mesopore architecture reconciles the impedance matching-attenuation trade-off in lightweight absorbers. Ku-band (12-18 GHz) satellite communications and high-resolution radar demand electromagnetic wave (EMW) absorbing materials that integrate strong absorption, broad bandwidth, light weight, and electrical insulation. Carbon and silicon carbide (SiC) are attractive candidates due to their low density and complementary loss mechanisms—conduction loss and dielectric loss, respectively. However, conductive carbon absorbers suffer from poor impedance mismatch, whereas insulating SiC lacks sufficient dielectric loss. Simply mixing the two phases does not fundamentally resolve this trade-off. Herein, we advance beyond composition tuning by engineering a porous architecture. SiC/C microspheres were fabricated via carbothermal reduction followed by selective oxidation etching, using porous carbon spheres as templates. This post-treatment reduced the carbon content from ∼40 wt% to ∼2 wt% and simultaneously transformed the microporous architecture into a highly interconnected mesoporous network (81.18% mesopore ratio). The resulting material exhibits near-insulating behavior while delivering exceptional Ku-band absorption: a minimum reflection loss of −37.21 dB and an effective absorption bandwidth of 4.55 GHz (covering 11.05–15.6 GHz, most of the Ku-band) at a thickness of 2.4 mm. This work demonstrates that mesopore engineering effectively reconciles the attenuation-impedance matching trade-off, offering a novel path toward lightweight, insulating, and high-performance EMW absorbers for Ku-band applications.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Xiaohan Wu,Yu Deng,Xiaoshan Zhang,Nana Xu,Tao Liu,Peiyuan Zhang,Tianqi You,Songhe Zhang,Cheng Han,Bing Wang,Yingde Wang
CNT/SiC UFs with uniformly dispersed CNTs and tunable multiple lossy phases were successfully prepared. • CNT/SiC UFs exhibit excellent high-temperature stability (1500 °C) and low thermal conductivity (∼197 mW m -1 K -1 at 1500 °C). • CNT/SiC UFs demonstrate outstanding EMW absorption performance ( RL min of -45.52 dB and EAB of 6.44 GHz at 2.7 mm thickness). Silicon carbide (SiC) fibers are promising lightweight and high-temperature-stable electromagnetic wave (EMW)-absorbing materials for aerospace applications. However, their EMW absorption performance severely degrades at high-temperature. Recently, incorporating carbon nanotubes (CNTs), which exhibit excellent high-temperature stability, large specific surface area, and electrical conductivity, into SiC fibers has been proved to be effective in optimizing the high-temperature stability and EMW absorption performance of SiC fibers. However, the non-uniform dispersion of CNTs and the instability of the impedance-matching phase (SiC x O y ) at high-temperature often result in the degradation of mechanical properties and EMW absorption performance. Here, these obstacles are overcome by preparing CNT/SiC ultrafine fibers (UFs) with uniformly distributed CNTs and multiple thermally stable phases (CNTs, SiC, and free carbon). The CNT/SiC UFs exhibit an effective absorption bandwidth (EAB) of 6.44 GHz (2.7 mm thickness) and a minimum reflection loss of −45.52 dB. Even after thermal treatment at 1500 °C, the fibers exhibit excellent EMW-absorbing performance, with an EAB of 4.43 GHz at a 2.7 mm thickness, significantly surpassing the performance of SiC UFs (2.47 GHz). The prepared CNT/SiC UFs also display excellent flexibility, high-temperature stability, and ultra-low thermal conductivity (∼28 mW·m −1 ·K −1 and 197 mW·m −1 ·K −1 at ambient temperature and 1500 °C, respectively). The outstanding integrated properties of CNT/SiC UFs make them ideal EMW-absorbing materials for aerospace applications under extreme conditions. Download: Download high-res image (231KB) Download: Download full-size image
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Qi Zeng,Xinyi Xie,Cuilian Zhu,Lili Hu,Bo Xiao,Shupeng Guo,Bo Hou,Lili Liu,Min Zhong
The SiC NP-modified high thermal conductivity Co/Al2O3@Al Fischer–Tropsch synthesis (FTS) catalyst has been proven to significantly enhance catalytic activity and selectivity toward long-chain hydrocarbons (C5+), but the underlying mechanism responsible for this promotional effect remains unclear. In this study, commercially available SiO2 NPs are used as a substitute for SiC NPs to prepare a cost-effective SiO2-modified Co/Al2O3@Al catalyst (Co/AS-O) for improved FTS performance, serving as a reference to elucidate the unique role of SiC NPs in enhancing FTS performance. Systematic characterizations demonstrate that SiC promotes the formation of the hexagonal close-packed (HCP) Co phase, yielding a higher intrinsic activity. In contrast, the face-centered cubic (FCC) Co phase predominates in the Co/AS-O and an unmodified reference catalyst (Co/A-Y). Although both modified catalysts exhibit enhanced CO conversion, the superior activity of the SiC NP-modified catalyst (Co/AS-C) stems from an increased density of active sites and its higher intrinsic activity, as evidenced by a higher turnover frequency (TOF). In contrast, the enhancement for Co/AS-O is solely due to a greater number of exposed Co0 sites. Moreover, the incorporation of NPs enhances *CO adsorption and restricts the activity of surface *H species, collectively establishing a *C-rich microenvironment that promotes chain growth and olefin formation. This study provides a fundamental understanding of how inert NPs modulate the FTS performance of the thermally conductive Co/Al2O3@Al catalyst.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124801
·
IF 7.5
Fei Liu,Gaopeng Wu,Lihao Chen,Guohao Shi,Liwen Tang,Bolun Ji,Jianwei Li,Xinhai He
Industrial oily wastewater and water-in-oil (W/O) emulsions are difficult to treat because of the high stability of dispersed water droplets, while conventional superhydrophobic membranes often suffer from poor durability and performance degradation under harsh operating conditions. Therefore, the development of robust superhydrophobic membranes with high separation efficiency and long-term stability remains a significant challenge. To address these issues, a high-adhesion superhydrophobic SiC/SiO 2 fibrous membrane was fabricated through covalent grafting of octyltriethoxysilane (OTES) onto a hierarchical ceramic framework. The abundant surface hydroxyl groups provided active anchoring sites for the formation of a crosslinked polysiloxane network, while the optimized grafting conditions promoted a high-adhesion superhydrophobic state with pronounced liquid pinning behavior, consistent with the Cassie-impregnating regime. The resulting membrane exhibited a water contact angle (WCA) of 153.3° and maintained stable superhydrophobicity after exposure to acidic, alkaline, and high-temperature environments. Benefiting from the synergistic effects of hierarchical pore architecture and interfacial wettability, the membrane achieved separation efficiencies above 98.5% for various W/O emulsions, together with a maximum permeation flux of 1305 L·m −2 ·h −1 at 3.0 bar. In addition, the membrane demonstrated excellent anti fouling performance and long-term operational stability during continuous filtration and cyclic separation tests. This work provides a feasible strategy for engineering high-adhesion Cassie-impregnating wetting interfaces on electrospun SiC/SiO 2 ceramic fibrous membrane and offers a promising route for efficient oil-water separation under harsh conditions.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124645
·
IF 7.5
Xingwang Xu,Jiayi Liu,Bin Lin,Tianyi Sui,Jinming Li,Bingrui Lv,Pengcheng Zhao,Hetian Hou,Cong Chen,Hualong Zhang,Yuhao Zhang,Jinhua Wei,Haoji Wang,Mingqiang Tang
Photocatalysis assisted chemical mechanical polishing is considered an effective method for achieving atomic-scale flatness on reaction-sintered silicon carbide (RS-SiC) surfaces. However, the recombination of photogenerated carriers severely limits its further development. Meanwhile, photoelectric and other multi-energy field catalysis assisted chemical mechanical polishing can solve the above problems, but it will significantly increase energy consumption and pollution, but it will significantly increase energy consumption and pollution. In this study, t-BaTiO 3 was regarded as catalyst, and a piezoelectric-photocatalysis assisted chemical mechanical cost-effective and efficient polishing technology was proposed. Polishing pressure and shear force induce a built-in electric field in t-BaTiO 3 , thereby inhibiting the recombination of photogenerated carriers. The experimental results showed that, compared with photocatalysis oxidation, pressure-induced piezoelectric-photocatalysis treatment increased the oxygen content of the RS-SiC surface by 11.77%, reduced the surface hardness by 10.45 GPa, and yielded a polished surface roughness as low as 0.18 nm. More importantly, compared with the other methods, this approach reduced both cost and energy consumption by 50%. These findings confirm that the proposed method is an efficient and environmentally friendly polishing technology with substantial potential to advance chemical mechanical polishing.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 47
·期 3
·118934
·
IF 6.3
Kai Ge,Xihai Jin,Zhenzhong Xing,Huiying Ouyang,Subo Zhang,Xiao You,Yusheng Ding,Shaoming Dong
This work explores SiC morphology regulation for structure-function integration in porous oxide/oxide ceramic matrix composites (CMCs). Alumina-mullite fiber reinforced Al 2 O 3 -based composites containing SiC particles were heat-treated at 1150 °C and modified by subsequent chemical vapor infiltration (CVI) at 1100 °C to introduce SiC nanowires (SiCnws) or spheroidal SiC deposits. The composite with a moderate nanowire content combined a flexural strength of 208.9 ± 6.3 MPa with the widest effective absorption bandwidth (EAB) of 6.19 GHz at 2.0 mm, while retaining non-brittle fracture behavior. The increased flexural strength is associated with SiCnw reinforcement and further matrix consolidation during CVI, and the wide EAB is attributed to a favorable balance between dielectric attenuation and impedance matching. Further SiCnw growth yielded a minimum reflection loss of −55.9 dB at 1.6 mm but was accompanied by lower flexural strength and a narrower EAB. By comparison, the particulate reference exhibited insufficient attenuation, whereas the composite containing compact aggregates of spheroidal deposits showed stronger attenuation but poorer impedance matching, limiting its bandwidth. Tailoring SiC morphology and content therefore offers a route to integrating broadband electromagnetic wave absorption with load-bearing performance in porous CMCs.
✓ 已验证
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2022
·
IF 4.632
Tingting Bao,Hui zhou,Yi Zhang,Chenxu Guo,Wenming Guo,Hang Qin,Pengzhao Gao,Hanning Xiao,Weixiong Liu
Ni/CeO 2 catalysts ( n CeO2 : n Ni = 0, 1, 4, 7, 10) supported on SiC porous ceramics for ethanol steam reforming (ESR) were investigated with respect to hydrogen production performance and growth of carbon deposition. The oxygen released from CeO 2 enables the oxidation of CH x species to serve as carbon precursors, thus providing Ni/CeO 2 catalysts with stronger resistance to carbon deposition compared with Ni catalysts. The Ni/CeO 2 catalysts prepared by inverse microemulsion and impregnation methods exhibit regular semicircular spherical shape on SiC porous ceramics. Under 500 °C for 25 h of ESR reaction, the ethanol conversion rate over Ni/CeO 2 catalysts ( n CeO2 : n Ni = 7) is sustained up to 100% and H 2 selectivity is essentially kept at 74%. The by-product selectivity declines stepwise with increasing content of CeO 2 , which is attributed to the adsorption and oxidation of CO and of CH x species as CH 4 precursor from CeO 2 . The scanning electron microscopy (SEM) and transform electron microscopy (TEM) results reveal that further loading of CeO 2 on the surface of Ni catalysts can alleviate both migration and sintering of Ni particles. Furthermore, carbon deposition on Ni/CeO 2 catalysts preferentially outgrow filamentous rather than amorphous carbon , with a tendency for the latter to be more deactivated.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Huanhuan Li,Xiaoyan Yuan,Penghuan Zhao,Zhuoying Ping,Yi Liu,Shouwu Guo
A ingenious approach of synergistic strategy between MXene and one-dimensional (1D) materials have been proved for enhancing the performance of composites. However, the problem of MXene aggregation in compounding processes usually reduces their superiority. Herein, few-layered Ti 3 C 2 T x wrapped SiC/C nanofibers (SiC/C@MXene NFs) with a core-sheath microstructure were synthesized via a method of electrostatic self-assembly. Strong electrostatic adsorption bonding anchored the Ti 3 C 2 T x sheets on surface of the SiC/C NFs, which effectively inhibited the self-restacking and thus efficiently enhanced their electromagnetic (EM) wave absorption and photothermal conversion performances. As a result, 8.0 wt% SiC/C@MXene NFs dispersed in paraffin simultaneously exhibited a minimum reflection loss (RL, dB) and effective absorption bandwidth (EAB, RL < -10 dB) of −70.9 dB and 6.32 GHz at 2.63 mm. Besides, 0.4 wt% SiC/C@MXene NFs dispersed in waterborne polyurethane (PU) achieved strong photothermal conversion abilities, with the maximum temperatures rising to 95, 145, 183, and 201 °C at light intensities of 0.1, 0.2, 0.3, and 0.4 W cm −2 , respectively. Therefore, the synergistic strategy effectively utilizes the structural advantages of the 2D Ti 3 C 2 T x and 1D SiC/C NFs, endowing SiC/C@MXene NFs with core-sheath microstructure, and effectively improving their EM wave absorption and photothermal conversion performances.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Yang Li,Maolin Chen,Qinzhao Zhang,Yanzi Gou,Peng Xiao,Pengju Chen,Wei Zhou,Xiaobing Zhou
Y 3 Si 2 C 2 ternary ceramics were in-situ grown on the third-generation Chinese commercial SiC fiber (KD-SA SiC fiber) surface via molten salt method. Microstructures and oxidation/corrosion behavior of in-situ grown Y 3 Si 2 C 2 coated SiC fibers exposed to air and wet-oxygen at 1400 ℃ were investigated. Results indicated that the layered Y 3 Si 2 C 2 slices with thickness of approximately 15 nm can be successfully in-situ grown on SiC fibers. The product on the fibers surface after oxidation/corrosion at 1400 ℃ for 1 h in both ambient air and wet-oxygen are Y 2 Si 2 O 7 and SiO 2 . Moreover, microstructural characterization indicates that the immigration and expansion of gaseous bubbles induced by oxidation product, mainly CO, result in microstructural differences of SiC fiber specimens, and finally oxidation mechanism based on the microstructural difference were proposed.
✓ 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）