FUEL
·
2021
·
IF 6.609
Zhige Zhang,Guofeng Zhao,Wenyang Li,Jiawei Zhong,Jun Xie
The efficient conversion of renewable biogas has attracted ever-increasing interest in past decades. Ni-CeO 2 -Al 2 O 3 supported on monolithic SiC-foam (denoted as Ni/CeO 2 -Al 2 O 3 /SCF) is designed and applied in biogas reforming. The monolithic Ni/CeO 2 -Al 2 O 3 /SCF catalysts were deeply characterized by XRD, ICP-AES, SEM, HR-TEM, CO 2 -TPD, etc. The cycle between CeO 2 -Al 2 O 3 and CeAlO 3 was verified by in-situ CH 4 /CO 2 -TPSR, and the catalytic role of CeAlO 3 in coke elimination and CO 2 activation was further confirmed. Due to the uniform distribution of Ni nanoparticles (NP S ) and the activation of CO 2 by CeAlO 3 , Ni/CeAlO 3 -Al 2 O 3 /SCF shows excellent catalytic stability to inhibit sintering and eliminate carbon deposition. At 900 °C and a gas hourly space velocity (GSHV) of 24000 mL g Cat -1 h −1 , excellent CH 4 /CO 2 conversion of 86/99% are initially achieved over Ni/CeAlO 3 -Al 2 O 3 /SCF catalyst, followed by slight decrease after 140 h, and remain basically stable for the next 260 h.
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DOI
高影响因子
Advanced Membranes
·
2025
·
IF 9.5
Qilian Li,Bin Lin,Wei Wei,Zhaoxiang Zhong,Weihong Xing
Silicon carbide (SiC) ceramic membranes are promising for high-temperature gas filtration due to their excellent thermal and chemical stability. However, the industrial deployment of conventional SiC ceramic membranes is limited by their low bending strength and high fabrication cost. This study pioneers a sustainable strategy utilizing industrial waste activated coke fly ash (ACFA), as a dual-functional sintering aid and pore-forming agent for the fabrication of high-performance SiC supports. By systematically investigating the sintering kinetics and phase evolution mechanism of the ACFA-aided SiC supports, we established a composition-property relationship that reveals the critical role of ACFA-derived mineral phases in simultaneously enhancing mechanical integrity and filtration performance. With 12 wt.% ACFA sintered at 1400 °C the SiC support achieved optimal bending strength (28.6 MPa). This bending strength was approximately 25% higher than that of conventional SiC supports (22.8 MPa). Moreover, the ACFA-aided SiC support exhibited satisfactory thermal shock resistance and corrosion resistance during 20 cycles of thermal shocking and alkali metal corrosion tests. This work provides a sustainable route for fabricating cost-effective SiC supports with enhanced mechanical strength to broaden their applications in industrial hot gas filtration.
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高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
C. Liu,H.P. Zhou,H. Zhou,B. Yang,Z.K. Li,S. Zhang,T.T. Feng,Z.Q. Xu,Z.X. Fang,M.Q. Wu
The chemical vapor deposition (CVD) based Si C composite anode materials attract worldwide attention due to their potential to solve the notorious problems of volume expansion and electrode instability of Si-based anode materials. Herein, a high-strength, high-flexibility, and high-conductivity carbon skeleton composed of graphene and carbon nanotubes (CNTs) was constructed via spray-drying to load Si using the CVD process . The unique electrical, mechanical, and porous properties of the composite carbon skeleton jointly contribute to the excellent electrochemical performance of the composite anode. Even without the carbon coating, this composite possesses a high capacity of 1154 mAh g −1 and a capacity retention of 98.7 % after 150 cycles at 0.5 A g −1 . Plasma-enhanced chemical vapor deposition (PECVD) was used to deposit an ultrathin onion-like carbon layer on the composite, further enhancing its cyclic stability (802 mAh g −1 @1 A g −1 with a capacity retention of 90.7 % after 500 cycles). The composite anode's significant potential was further confirmed in a full cell paired with a commercial NCM811 cathode, achieving a high energy density of 430 Wh kg −1 and an outstanding capacity retention of 72.0 % after 150 cycles at 1C.
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高影响因子
Nanoscale
·
2015
·Vol. 7
·期 19
·8955-8961
·
IF 7.394
Tao Yang,Xiwang Chang,Junhong Chen,Kuo-Chih Chou,Xinmei Hou
B-doped 3C-SiC nanowires have been synthesized via a facile and simple carbothermal reduction method at 1500 °C for 2 h in a flowing purified argon atmosphere. The obtained nanowires possess a single crystalline and finned microstructure with fins about 100–200 nm in diameter and 10–20 nm in thickness. The diameter of the inner core stem is about 80 nm on average. Due to the smaller band gap, the finned microstructure and the single crystalline nature, the B-doped 3C-SiC nanowires demonstrate efficient activity as high as 108.4 μmol h−1 g−1 for H2 production, which is about 20 times higher than that of 3C-SiC nanowhiskers and 2.6 times higher than the highest value reported in the literature for SiC materials.
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高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Ming-Hao Guan,Hao-Nan Xu,Jin Liu,Tao Wu,An-Hui Lu
Regulating the intermediates involved in the electrocatalytic nitrate reduction reaction (NO 3 RR) is crucial for the enhancement of reaction efficiency. However, it remains a great challenge to regulate the reaction intermediates through active site manipulation on the surface of the catalyst. Here, a family of n %-Co 3 O 4 /SiC ( n = 5, 8, 12, 20) catalysts with a delicate percentage of Co 2+ and Co 3+ were prepared for NO 3 RR. We found that Co 3+ primarily acts as the active site for NO 3 − reduction to NO 2 − , while Co 2+ is responsible for the conversion of NO 2 − to NH 3 . Moreover, the conversion of these intermediates over the active sites is autonomous and separately controllable. Both processes synergistically accomplish the reduction of nitrate ions to synthesize ammonia. Combining the experimental studies and density functional theory (DFT) calculations, it is discovered the pathway (*NHO→*NHOH→*NH 2 OH→*NH 2 →*NH 3 ) is more favorable due to the lower Δ G value (0.25 eV) for the rate-limiting step (*NO→*NHO). The NH 3 yield rate of 8%-Co 3 O 4 /SiC reached 1.08 mmol/(cm 2 h) with a Faradaic efficiency of 96.4% at −0.89 V versus the reversible hydrogen electrode (RHE), surpassing those of most reported non-noble NO 3 RR catalysts. This strategy not only provides an efficient catalyst for NO 3 RR but also serves as an illustrative model for the regulation of multi-step reaction intermediates through the design of distinct active sites, thereby presenting a new approach to enhance the efficiency of intricate reactions.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Hongrui Wang,Xiangyu Zhang,Huan Guo,Beibei Ma,Bingzhu Wang,Shaoming Dong,Jianjun Sha
SiC f /SiC composites serve as key candidate materials for hot-end parts in the aerospace domain. However, the damage behavior of SiC f /SiC composites under high-temperature water-oxygen environments and its impact on mechanical properties remain to be further clarified. In this work, the microstructural evolution and residual mechanical properties of mini-SiC f /SiC composites oxidized in a 90% O 2 + 10% H 2 O atmosphere at temperatures from 1000 to 1600 °C were investigated. The residual strength of mini-SiC f /SiC composites exhibits a non-monotonic temperature dependence, initially increasing at 1200 °C and subsequently decreasing at temperatures above 1400 °C. The primary mechanisms are as follows: at 1200 °C, the oxidation products of the BN interphase enhance the interfacial bonding strength, thereby improving the mechanical strength; whereas at temperatures ranging from 1400 °C to 1600 °C, SiC grain growth emerges as the dominant factor, leading to the deterioration of mechanical properties.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Wanqiu Chen,Ma Qin,Fei Cheng,Jinghong Qiu,Zongliang Du,Xu Cheng,Haibo Wang,Xiaosheng Du
Developing multifunctional form-stable phase change materials (PCMs) with high energy density and robust environmental adaptability is pivotal for sustainable thermal management. Herein, a facile and scalable “biomass-to-ceramic” strategy is reported to engineer potato-derived silicon carbide (SiC) aerogels as robust scaffolds for n -octadecane-based composites (SiCPCMs). Through sequential hydrothermal gelatinization and in-situ carbothermal reduction, the natural cellular architecture of potato was transformed into a 3D interconnected SiC framework. This rigid ceramic network not only effectively prevents liquid leakage via strong capillary forces but also serves as a highly conductive and dielectric skeleton. Consequently, the optimal SiCPCMs exhibit a high latent heat storage capacity (up to 234.3 J/g) with an impressive encapsulation efficiency of 87.22%. Furthermore, the integration of the SiC aerogel significantly enhances thermal conductivity by 96.40% and achieves a superior solar thermal storage efficiency of 91.51%. The composites also demonstrate excellent electromagnetic interference (EMI) shielding effectiveness of 33.03 dB in the X-band. Building energy simulations further reveal that deploying these SiCPCMs can reduce cooling energy consumption by approximately 42% in representative cities. This work establishes a sustainable paradigm for upcycling agricultural biomass into high-value multifunctional ceramics for next-generation green buildings and electronic protection.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Haiyang Li,Leilei Zhang,Xuemin Yin,Mengjiao Li,Boshi Song,Houbu Li,Hejun Li
Hypersonic thermal protection requires materials with thermal shielding and electromagnetic wave absorption capabilities. While silicon carbide (SiC) aerogel is a promising candidate due to their dielectric properties, porosity, and thermal stability, the conventional forms face an intrinsic trade-off between microwave absorption and thermal insulating. Inspired by natural hollow structure of reeds, this work proposes a novel in-situ growth technique combined with a sacrificial-template process to fabricate a lightweight SiC-based composite aerogel featuring a unique hollow microtube-nanowire hybrid architecture (SCN-SCH). Impressively, the hollow microtubes, in synergy with the nanowire network and optimized SiC content, contribute to enhanced electromagnetic wave absorption through improved impedance matching and abundant heterogeneous interfaces. Crucially, this hollow architecture achieves substantially improved insulation performance while preserving the ultralow density (0.038 W/(m·K) thermal conductivity) and mechanical robustness (70% compressibility, resilience over 50 cycles) of the aerogel. Moreover, this multiscale structure of SCN-SCH aerogel delivers a broadband absorption band extending to 3.9 GHz at a thickness of 2.6 mm and a minimum reflection loss of −59.37 dB. This study not only provide a bioinspired multiscale engineering strategy of SiC aerogels to effectively improve the conflict between thermal insulation and microwave absorption, but also offers a new design paradigm for high-performance multi-functional materials in extreme environments.
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高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Xia Yang,Huihuang Ma,Yikun Liu,Qunfang Lin,Xiaodong Zhou
Silica (SiO 2 ) nanofiber membranes are promising shields for high-energy lasers due to strong multiple scattering; however, protective performance is often limited by heat accumulation when optical shielding and thermal management cannot be achieved simultaneously. Here, we report a photothermal co-design strategy based on a multilayer SiC/SiO 2 ceramic nanofiber membrane constructed by periodic stacking of a repeating SiO 2 scattering / SiC-SiO 2 thermal-spreading / SiO 2 scattering unit. The SiO 2 layers provide high reflectivity via multiscale scattering, whereas the interfacial-engineered SiC-SiO 2 layer is formed through molecular-scale crosslinking between SiC and SiO 2 , which establishes continuous in-plane thermal-spreading pathways while maintaining robust interlayer coupling. Consequently, the SiC/SiO 2 NFM-7L exhibits an overall reflectivity exceeding 90% at 1080 nm together with pronounced thermal anisotropy. Among the tested configurations, the membrane delivers the best performance: after 120 s of continuous irradiation at 21.9 kW/cm 2 , it remains structurally intact and limits the rear-surface temperature to below 400 °C, effectively protecting the underlying substrate. This work establishes a scalable photothermal architecture that can be extended to other ceramic nanofiber systems, providing a platform for designing multifunctional protective materials under extreme laser-thermal environments.
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高影响因子
Journal of Manufacturing Processes
·
2026
·
IF 7.8
Chenqian Yang,Ce Sun,Peng Chen,Xiaolong Gong,Song Zhang,Meijun Yang,Kai Liu
During laser powder bed fusion (LPBF) of complex structures, different inclined angles are unavoidable to form the curved surfaces or overhangs, which results in step textures and degraded surface performance. Therefore, this study proposes an innovative method based on laser chemical vapor deposition (LCVD) that achieves effective filling of the step gaps in the LPBF-fabricated silicon carbide (SiC) substrates. The effects of deposition temperature and substrate rotation angles on coating morphology, mechanical properties and bonding strength are studied in depth. With the increase of deposition temperature, grains in the step grooves grow faster and the grain size becomes more uniform. As the rotation angle increases, the step gaps decrease, which promotes grain merging to fill the gaps and the growth of (111)-oriented grains. The nanomechanical properties are significantly enhanced, with an elastic modulus of 404 GPa and a hardness of 48.7 GPa. In addition, the critical interfacial adhesion increases from 19.4 N for the 0° substrate to 27.4 N for the 90° substrate, indicating a 41% enhancement with increasing surface step orientation. This study provides a practical solution for improving surface quality in additively manufactured SiC components for high-end applications.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2026
·
IF 8.8
Ying Zhang,Yiqing Zeng,Dong Zou,Zhaoxiang Zhong,Weihong Xing
Silicon carbide (SiC) ceramic membranes offer indispensable advantages for environmental applications particularly at extreme conditions, owing to their unique physical and chemical properties. However, their widespread application has been hindered by complex multistep fabrication processes, such as repeated coating–drying–sintering process, which are time-intensive and costly. To overcome these challenges, this study employed a novel foam–gel casting technique for the single-step fabrication of asymmetric SiC foam ceramic membranes (SiFCMs), integrating the foam support layer and the functional membrane layer simultaneously. Furthermore, in situ -grown mullite whiskers were incorporated to enhance membrane performance. The growth behavior of the mullite whiskers and the formation mechanism of the bilayer structure were thoroughly investigated. By adjusting the foaming agent content and sintering temperature, synchronous control over the microstructure and properties was achieved, enabling precise tuning of porosity (52.35%–75.61%), membrane layer thickness (98–325 μm), and support layer pore size (171–626 μm). The optimized SiFCMs (solid loading: 65–71 wt%) exhibited a remarkable combination of properties: bending strength of 7.1–7.4 MPa, average pore size of 4.98–8.92 μm, and high gas permeance of 332.5–368.7 m 3 m −2 h −1 ·kPa −1 . The membranes also demonstrated excellent interfacial bonding strength and outstanding chemical corrosion resistance. The separation performance of the resulting membrane was characterized by separating submicron particles at 300 °C, achieving 99.99% rejection rate for PM 0.3 . This study establishes an economically viable technical pathway for fabricating high-performance SiC ceramic membranes, thereby laying a solid foundation for meeting the application demands at extreme conditions.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Qilin Gu,Han Zhang,Zheng Liang,Junyou Li,Ziyu Wang,Jian Zhou,Zhaoxiang Zhong,Yiqun Fan,Weihong Xing
Preparation of ceramic membranes with narrow pore size distribution are highly desired for the high accuracy separation, while it is rather challenging due to the randomly stacking of ceramic particles especially on macroporous supports. In this work, by screening the particle size and distribution of SiC powders to match with the pore characteristics of the SiC supports, asymmetric SiC membranes with narrow pore size distribution were successfully prepared on reaction-bonded SiC supports with multiple-peak distribution in the range of 0.1-1.5 μm. Three types of SiC powders (P1, P3 and P5) were selected and correspondingly well-dispersed ceramic slurry were formulated. Then, three types of SiC membranes (M1, M3 and M5) with tailored thickness of 20 μm were realized based on the capillary force dominated formation mechanism. Results showed that the M5 membranes showed excellent hydrophilicity (WCA<15°), narrow pore size distribution (distribution factor α<0.88) and the highest water permeance (1476±159 L m -2 h -1 bar -1 ). Besides, it was found that the pore size of SiC membranes became smaller and more uniform with the increasing sintering temperature, originating from the surface oxidation and volume expansion of SiC particles. Three membranes (M1, M3, M5) were used to separate 100 mg L -1 of (lubricated) oil-water emulsion, and the retention rates were all greater than 90% at a lower transmembrane pressure (TMP) of 0.5 bar, meeting the national emission standards of China. This work demonstrates the feasibility of preparing asymmetric membranes with tailored thickness and narrow pore size distribution based on the reaction-bonded SiC supports and their promising application in high-efficient oil-in-water emulsion separation.
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高影响因子
危险品化学品经营许可证（带存储）