Facile preparation of morph-genetic SiC/C porous ceramic at low temperature by processed bio-template

Liu, Hexing; Deng, Chengji; Wang, Xing; Yu, Chao; Ding, Jun; Zhu, Hao

doi:10.1016/j.ceramint.2019.10.158

Cited by 19 publications

(7 citation statements)

References 41 publications

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“…In the spectrum of Si 2p, the characteristic peaks belonging to SiC and SiO correspond to two characteristic peaks split at 101.40 and 103.20 eV, respectively (Figure 4c). 33 In the core level spectrum of O 1s, an absorption peak can be observed at 531.60 eV due to the presence of O‐Si bonds. The conformal coating of SiC on the surface of the graphite particles and the existence of a small amount of SiO 2 trace in the coating layer are confirmed from the XPS results.…”

Section: Resultsmentioning

confidence: 99%

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Huang

Tian

Kong

et al. 2023

J of Applied Polymer Sci

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As a potential thermal conductive filler, spherical graphite (SG) has high thermal conductivity, low density, and a good spherical shape structure.However, the poor electrical insulation of SG will seriously limit its application in highly integrated electronic device packaging. Herein, through a simple liquid-solid chemical reaction, the surface of the SG particle is firmly covered by a uniform silicon carbide (SiC) ceramic coating. Subsequently, a polycarbo-

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Section: Resultsmentioning

confidence: 99%

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Huang

Tian

Kong

et al. 2023

J of Applied Polymer Sci

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“…Liu et al prepared the β-SiC/C porous ceramic using pine wood-derived carbon, silicon powder, and Fe(NO 3 ) 3 ·9H 2 O as a catalyst at 1300 °C with pore sizes in the range of 0.3–3 μm. However, the prepared β-SiC/C porous ceramic had ∼37 wt % weight loss in the air at ∼737 °C . Carbon (965 m 2 /g) from CO 2 -activated plane tree seeds (850 °C for 1 h) and tetraethyl orthosilicate as a silicon source were used to prepare ultralong β-SiC nanowires at 1400 °C for 2 h, although the specific surface area of the prepared β-SiC was not reported.…”

Section: Introductionmentioning

confidence: 99%

“…However, the prepared β-SiC/C porous ceramic had ∼37 wt % weight loss in the air at ∼737 °C. 34 Carbon (965 m 2 /g) from CO 2 -activated plane tree seeds (850 °C for 1 h) and tetraethyl orthosilicate as a silicon source were used to prepare ultralong β-SiC nanowires at 1400 °C for 2 h, 35 although the specific surface area of the prepared β-SiC was not reported. Hence, the challenge in the fabrication of high porous β-SiC as catalyst supports structures is the complex carbon template process and the expensive silicon source.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis of Highly Nanoporous β-Silicon Carbide from Corn Stover and Sandstone

Wang

Gong

et al. 2020

ACS Sustainable Chem. Eng.

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Porous β-Silicon carbide (β-SiC) is an important ceramic material due to its superior properties, such as high surface area, excellent chemical and mechanical stability, and high resistance toward oxidation and corrosion. In this study, inexpensive and easily obtained corn stover and sandstone were used as the carbon and silicon sources, respectively, and porous β-SiC was effectively synthesized with a high yield. The synthesized β-SiC was characterized by XRD, Raman, SEM, TEM, and TGA, and the gaseous products were also analyzed with an integrated furnace-MS system. The results show that the produced β-SiC exhibited a nanostructure that followed the graphitic carbon template derived from the pyrolysis of the corn stover. The surface area as high as 397 m 2 /g, the pore volume of 0.4 cm 3 /g, as well as the majority pore diameters of 3−6 nm were achieved. CO and CO 2 were released during the reaction between vaporized SiO and graphite. The effect of temperature in the range of 1000 to 1700 °C was also studied, and the results point to a strong dependence between the process temperature and the yield and density of β-SiC. Also, the possible mechanism of synthesized β-SiC was proposed and confirmed with experimental results. This study provides a simple and an ecofriendly carbothermal reduction approach to produce nanoporous β-SiC with agriculture waste and sandstone, which could help establish the green economy in the US.

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“…12 The hard template is mainly used to replicate the original structure and morphology of the biological templates. 13 For instance, by mixing the precursor solutions with the biomaterials, nucleation and growth in situ occur in the external/or internal surface of the templates because of the spatial restriction. 14 For instance, Zhao et al used pomelo peel as a biological template to prepare the LaFeO 3 perovskite with hierarchically porous structures, which showed a much enhanced catalytic activity in catalytic oxidation of NO than other LaFeO 3 prepared without a template.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Currently, the use of biomaterials for preparing catalysts usually follows template-driven growth including two types of strategies, that is, hard template and soft template . The hard template is mainly used to replicate the original structure and morphology of the biological templates . For instance, by mixing the precursor solutions with the biomaterials, nucleation and growth in situ occur in the external/or internal surface of the templates because of the spatial restriction .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Integrated CuO/ZnO/OS Nanocatalysts by Using Acid-Etched Oyster Shells as a Support for CO₂ Hydrogenation

Liu

Zhan

et al. 2020

ACS Sustainable Chem. Eng.

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The oyster shell (OS) is a typical biomineralized material from nature containing a large quantity of CaCO3 (approximately 96.23 wt %), which has been extensively used as a template/precursor for fabricating various functional nanomaterials. However, the matrix proteins in the uncalcified layer of the OS structure (approximately 3.75 wt %) are largely ignored during the utilization. In this regard, herein, we focused on the chemical pretreatment of the OS by hydrolysis of matrix proteins with different saturated fatty acids. The obtained acid-etched OS (a-OS) with rich coordination sites (−COOH and −NH2) was then used as a support to load Cu(Zn)-BTC nanoparticles. In particular, a rationally designed Cu(Zn)-BTC/a-OS was synthesized by mixing the a-OS with the precursor solutions under the complexation between the exposed functional groups and the transition-metal ions (Cu2+ and Zn2+). We also prepared CuO/ZnO/a-OS catalysts by calcining Cu(Zn)-BTC/a-OS in air, and their workability was examined in the catalytic CO2 hydrogenation reaction. Interestingly, the CO2 conversion over CuO/ZnO/a-OS increased from 1.9 to 6.6% as compared with CuO/ZnO/OS, and the methanol yield increased from 1.3 to 4.2%. We demonstrated that the acidity and chemical structure of the saturated fatty acids played a comprehensive role in determining the hydrolysis of matrix proteins of the OS (viz., etching degree), which significantly affected the catalytic activity. It was found that the activity of a-OS-supported catalysts increased in the following sequence: benzoic acid < dodecanoic acid < acetic acid < palmitic acid < stearic acid. Accordingly, we have developed an efficient and green route to prepare supported CuO/ZnO nanocatalysts by using the cheap and ecofriendly OS powder as a support.

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Facile preparation of morph-genetic SiC/C porous ceramic at low temperature by processed bio-template

Cited by 19 publications

References 41 publications

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Synthesis of Highly Nanoporous β-Silicon Carbide from Corn Stover and Sandstone

Preparation of Integrated CuO/ZnO/OS Nanocatalysts by Using Acid-Etched Oyster Shells as a Support for CO₂ Hydrogenation

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Facile preparation of morph-genetic SiC/C porous ceramic at low temperature by processed bio-template

Cited by 19 publications

References 41 publications

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Coating dense silicon carbide layer on artificial graphites to achieve synergistically enhanced thermal conductivity and electronic insulation of polymer composites

Synthesis of Highly Nanoporous β-Silicon Carbide from Corn Stover and Sandstone

Preparation of Integrated CuO/ZnO/OS Nanocatalysts by Using Acid-Etched Oyster Shells as a Support for CO2 Hydrogenation

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Preparation of Integrated CuO/ZnO/OS Nanocatalysts by Using Acid-Etched Oyster Shells as a Support for CO₂ Hydrogenation