JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 30
·期 2
·1487-1495
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IF 2.324
Liu Yangwen,Gao Fengmei,Wang Lin,Yang Weiyou,He Xinbo,Hou Huilin
In the present work, we reported the fabrication of CdS decorated mesoporous SiC hollow nanofibers for efficient visible-light-driven photocatalytic hydrogen production. The mesoporous SiC hollow nanofibers were firstly fabricated by electrospinning, followed by hydrothermal treatment to introduce the CdS nanoparticles decorated on the preformed fiber matrix, The resultant CdS/SiC hybrid photocatalysts were systematically characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM) and N 2 adsorption. The as-fabricated CdS/SiC hybrids exhibited a robust stability with a release rate up to ~ 124.65 µmol h −1 g −1 for photocatalytic H 2 evolution driven by visible light, which was profoundly enhanced for more than 16 times to that of pristine SiC counterparts, and comparable to the state-of-the-art one of SiC-based photocatalysts.
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高影响因子
CERAMICS INTERNATIONAL
·
2015
·
IF 2.605
Konghao Chen,Yixin Hua,Cunying Xu,Qibo Zhang,Cancan Qi,Yafei Jie
TiC/SiC composites were successfully prepared from Ti-enriched slag via an electro-deoxidization process in molten CaCl 2 –NaCl eutectic melt at 700 °C in argon. Electrolysis was conducted at an applied voltage of 3.2 V using a graphite anode and a composite cathode composed of graphite powder and Ti-enriched slag. According to the results, a possible reaction pathway was suggested: firstly the complex Ti-compounds were decomposed into TiO 2 -based simple oxides; then a mass of CaTiO 3 and a spot of CaSiO 3 formed accompanied by the reduction of titanium dioxide to titanium sub-oxide such as TiO, Ti 2 O; finally the graphite powder involved in the formation of SiC, TiC 1− x O x , which were further converted into SiC and TiC by prolonging electrolysis.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2015
·
IF 3.071
Zhenchong Zhang,Yizhuo Gu,Shaokai Wang,Min Li,Jiayu Bi,Zuoguang Zhang
A polymer composite with high dielectric permittivity was prepared by embedding silicon carbide (SiC) whisker with an average diameter of 500 nm–1 μm in poly(vinylidene fluoride) (PVDF). However, the high dielectric loss and electrical conductivity of the two-phase composite prohibits its potential applications. Barium titanate (BT) particles with average diameter of 100 nm and 1 μm were incorporated as a third phase to fabricate a three-phase composite. The morphology structure, dielectric and electrical properties before and after the addition of BT particles were investigated. The three-phase composite exhibits largely suppressed dielectric loss and electrical conductivity without sacrificing the high dielectric permittivity, which was extremely hard to be realized for two-phase composite. It is also found that the nano-size BT is more favorable in achieving high dielectric permittivity than the micro-size BT, where their dielectric loss and electrical conductivity are similar. Furthermore, electric modulus analysis confirms the largely suppressed electron conduction process which results in the enhanced dielectric and electrical properties in three-phase composite.
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高影响因子
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
·
2024
·Vol. 31
·期 6
·1502-1513
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IF 3.1
Yang Bo-lin,Kuang Chang-liu,Liu Zheng-long,Yu Chao,Deng Cheng-ji,Ding Jun
ZrB 2 -based ceramic composites were prepared by spark plasma sintering using ZrB 2 powder prepared by molten salt method as raw material and SiC and nano-graphite as additives. The effects of nano-graphite addition on the physical properties and oxidation resistance of ZrB 2 -based ceramic samples were investigated. The results show that the addition of an appropriate amount of nano-graphite can effectively improve the density of ZrB 2 -based ceramic composites and improve the physical properties of the materials. The flexural strength of the ceramic sample with 8 vol.% nano-graphite reached 418.54 MPa, which was 53.14% higher than that of ZrB 2 –SiC ceramic material (273.31 MPa), and its oxidation resistance was also significantly improved. It demonstrats that the addition of an appropriate amount of nano-graphite can effectively improve the physical properties and oxidation resistance of ZrB 2 –SiC ceramic composites. Via prolonging its service life in application and promoting the development of ZrB 2 -based ceramic composites, it is of great significance for clean steel smelting.
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jianhao Zhang,Quan Li,Yi Jia,Li Sun,Yang Wang,Sheng Cui,Jian Yang
Developing radar-infrared-compatible stealth materials is challenging because the material performance requirements between infrared and radar stealth are contradictory. At present, ceramic aerogel is one of the candidate materials that may solve this problem. Here, polymer derived SiC/SiOC aerogels were prepared and their microstructures were tailored by annealing temperature. It is found that the synergistic effects of the pore size distribution, the formation of nano-turbostratic carbons (NTCs) network and the content of SiC nanoparticles contribute to the excellent electromagnetic wave absorption and improved infrared stealth performance of SiC/SiOC aerogel. When the thickness of SiC/SiOC aerogel is 1.78 mm, the minimum reflection loss is -53.5 dB and the maximum effective absorption bandwidth is 6 GHz. In addition, SiC/SiOC aerogel exhibits excellent thermal insulation properties and improved low infrared emissivity. This study provides insights for the development of materials with radar-infrared-compatible stealth properties.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haonan Liu,Chijia Wang,Shuyi Liu,Shun Zhang,Yapeng Gao,Zihua Wang,Zhanjian Liu,Ruitao Wang,Huaiyuan Wang
Currently, the issue of inadequate interfacial performance between inorganic fillers and resins in epoxy coatings has garnered significant attention. Therefore, in this study, hyperbranched polymers functionalized with hydroxyl and carboxyl groups were synthesized via a one-step method. The terminal groups of these polymers can undergo dehydration condensation reactions with the silanol groups on the surface of silicon carbide, forming covalent bonds that firmly anchor the polymers to the filler surface. This enhances the interfacial properties between filler and epoxy resin coating. The hyperbranched modified filler coating retains a significantly high impedance modulus following high-temperature and high-pressure corrosion testing. Specifically, the |Z| 0.01 Hz value for the EP/HBP-SiC 30% coating reaches 1.15 × 10 10 Ω·cm 2 , which is two orders of magnitude greater than that of the pure epoxy coating. Simultaneously, the simulation results indicate that the EP/HBP-SiC 30% coating has a higher average calculated density, suggesting an improvement in the internal density of the modified coating. Further analysis of the model’s parameters related to the corrosive media reveals reduced diffusion coefficients for CO 2 , H 2 O, and Cl - , as well as a decreased free volume fraction. This implies that hyperbranched polymers significantly enhance the dispersion and compatibility of SiC in epoxy resin, thereby effectively improving the barrier performance of the epoxy composite coating against corrosive media. In conclusion, this study offers a theoretical basis for the practical application of hyperbranched modification of inorganic fillers to improve the protective properties of coatings.
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Journal of Materials Chemistry C
·
2024
·
IF 5.7
Qiuqi Zhang,Xiao You,Huiying Ouyang,Yuanhang Yang,Zhenzhong Xing,Haodong Gu,Li Tian,Qingliang Shan,Xiangyu Zhang,Jinshan Yang,Shaoming Dong
In this work, a high-performance electromagnetic wave (EMW) absorber is prepared by the in situ growth of BN and SiC into a self-assembled 3D graphene skeleton via chemical vapor infiltration (CVI). The porous conductive graphene network extends the transmission path of incident microwaves by multiple scattering, and the ceramic coating effectively improves the impedance matching degree. Notably, the EMW absorbing performance of 3D-rGO/BN/SiC can be regulated by the high-temperature oxidation in air. Compared to the original absorbers, after being oxidized at 600 °C for 4 h in air, the optimal RLmin of the composites drops to −47.1 dB and the broadest EAB reaches 11.96 GHz, which can be attributed to the enhanced impedance matching degree. The controllable fabrication of 3D-rGO/BN/SiC composites can provide a guideline for rational design and fabrication of high-performance EMW absorbing materials in practical applications under medium oxidizing temperature.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Huiying Ouyang,Xiao You,Yuanhang Yang,Meihan Ren,Qiuqi Zhang,Ruixiang Deng,Xiangyu Zhang,Jinshan Yang,Shaoming Dong
The research on high-performance electromagnetic wave absorption materials with high-temperature and oxidative stability in extreme environments is gaining popularity. Herein, the lightweight silicon carbide nanowires (SiC nws )/SiC composites are fabricated with in-situ SiC interface on one-dimensional oriented SiC nws skeleton, which collaborative configuration by 3D printing and freeze casting assembly. The constructed porous structure optimizes the impedance matching degree and scattering intensity, the maximum effective absorption bandwidth (EAB max ) of 5.9 GHz and the minimum reflection loss (RL min ) of −41.4 dB can be realized. Considering the inherent oxidation resistance of SiC, the composites present well-maintained absorption performance at 600 °C. Even at 1100 °C, the EAB max of 4.9 GHz and RL min of −30.4 dB also demonstrate the high-temperature absorption stability of the composites, indicating exceptional wave absorption properties and thermal stability. The slight attenuation can be attributed to the decrease in impedance matching capability accompanying the elevated dielectric constant. This work clarifies the impact of structure and component synergy on wave absorption behavior, and offers a novel approach to producing high-performance and high-temperature resistance ceramic-based electromagnetic wave absorption materials suitable for extreme environments.
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VACUUM
·
2024
·
IF 3.8
Bomin Feng,Jun Chen,Yifei Yang,Mao Yang,Hongbing Wang,Changyin Zhong,Yawei Hao,Jinhua Yang,Jian Jiao,Yunxi Yao
It is vital to understand the BN/SiC interface formation process. In this work, we choose 4H–SiC (0001) single crystalline surfaces as substrates to grow BN thin films by chemical vapor deposition with a borane-ammonia complex precursor. The chemical composition, surface morphology , and crystalline phase of the prepared BN/4H–SiC (0001) thin films were comprehensively characterized with XPS, Raman, AFM, SEM and TEM techniques. With the optimized preparation conditions, BN thin films with high crystallinity and low oxygen content (2.8 at%) can be fabricated. Three key factors of pretreatment of precursor, pyrolysis temperature, and post heat treatment have great effect on the growth of BN thin films. The successfully prepared BN/SiC (0001) thin films with the optimized growth conditions provide an ideal model system to study the influence of the various growth parameters on the quality of the BN thin films and the interface structures .
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ACS Photonics
·
2024
·
IF 6.5
Shulin Sha,Kai Tang,Maosheng Liu,Peng Wan,Zeng Liu,Da Ning Shi,Caixia Kan,Mingming Jiang
Ferroelectric materials, known for their superior spontaneous polarization and pyroelectric and photovoltaic effects, offer a promising avenue for fabricating high-performance optoelectronic devices. Herein, we report an ultraviolet (UV) photodetector (PDs) based on BaTiO3@MXene/4H-SiC heterostructure, with its photosensitive properties significantly boosted by the ferro-pyro-phototronic effect. In the detector, the incorporation of MXene nanosheets boosts the spontaneous ferroelectric polarization of BaTiO3 nanocrystals, thereby strengthening the built-in electric field at the BaTiO3/4H-SiC heterojunction. The resulted BaTiO3@MXene/4H-SiC heterostructure can work in a self-biasing manner, with robust performances, including responsivity (∼187.74 mA/W), specific detectivity (∼6.52 × 1013 Jones), external quantum efficiency (∼75.07%), response/recovery time (∼74.3/122.7 μs) upon 310 nm light irradiation. Particularly, the superlinear increase of the photocurrent, which results from the hot-carrier multiplication in MXene nanosheets, allows the device to produce additional photocurrent under ultraviolet illumination. Theoretical analysis confirms that the surface modification of MXene nanosheets can effectively alter the length of the Ti–O bonds on BaTiO3 nanocrystal surfaces, thus enhancing their spontaneous ferroelectric polarization. Being seamlessly integrated into an ultraviolet wireless communication system, the BaTiO3@MXene/4H-SiC self-powered photodetector demonstrates promising application prospects in optoelectronic interconnection circuits. This study provides an optimization strategy for advanced BaTiO3 nanocrystals toward future high-performance electronic and optoelectronic devices in existing applications.
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Membranes
·
2024
·Vol. 14
·期 5
·117
·
IF 3.3
Yuqi Song,Kai Miao,Jinxin Liu,Yutang Kang,Dong Zou,Zhaoxiang Zhong
Membrane distillation (MD) is considered a promising technology for desalination. In the MD process, membrane pores are easily contaminated and wetted, which will degrade the permeate flux and salt rejection of the membrane. In this work, SiC ceramic membranes were used as the supports, and an Al2O3micro-nano structure was constructed on its surface. The surface energy of Al2O3@SiC micro-nano composite membranes was reduced by organosilane grafting modification. The effective deposition of Al2O3nanoflowers on the membrane surface increased membrane roughness and enhanced the anti-fouling and anti-wetting properties of the membranes. Simultaneously, the presence of nanoflowers also regulated the pore structures and thus decreased the membrane pore size. In addition, the effects of Al2(SO4)3concentration and sintering temperature on the surface morphology and performance of the membranes were investigated in detail. It was demonstrated that the water contact angle of the resulting membrane was 152.4°, which was higher than that of the pristine membrane (138.8°). In the treatment of saline water containing 35 g/L of NaCl, the permeate flux was about 11.1 kg⋅m−2⋅h−1and the salt rejection was above 99.9%. Note that the pristine ceramic membrane cannot be employed for MD due to its larger membrane pore size. This work provides a new method for preparing superhydrophobic ceramic membranes for MD.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Jiangxiao Qiao,Jinxin Gan,Fei Gao,Xiangsen Xu,Jiesong Tan,Yiqing Zeng,Feng Zhang,Feng Han,Zhaoxiang Zhong,Weihong Xing
Synergistic removal of nitrogen oxides (NOx) and particulate matter (PM) can be achieved using multifunctional catalytic membranes. In this work, CePO4 nanorods were loaded on the pore surfaces of SiC membranes to construct the CePO4/SiC-X catalytic membranes. The stacked nanorod structure of the CePO4 catalyst layer facilitates the diffusion of gases to the catalyst surface during reactions. Owing to the high specific surface area, rich surface acidity, and strong redox capacity, the CePO4/SiC-400 catalytic membrane exhibits the best ammonia-selective catalytic reduction (NH3–SCR) denitration activity, achieving >90% NO conversion at a temperature of 250–380 °C and negligible N2O byproduct. In addition, the CePO4/SiC-400 catalytic membrane demonstrates excellent H2O and SO2 resistance. The performance of dust filtration and simultaneous dust filtration and denitration at 250–350 °C proposed that the dust rejection efficiency reached more than 99% at various conditions, and the dust filtration process did not affect the NH3–SCR performance of the CePO4/SiC-400 catalytic membrane. From the above results, the CePO4/SiC-400 catalytic membrane presents a broad application prospect in the simultaneous dust removal and denitration of high-temperature flue gas.
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