Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique

Yang, Chen; Zhang, Chang; Wang, Ning; Jensen, Michael; Li, Xianfeng; Zhang, Xingxiang

doi:10.1016/j.ceramint.2019.06.265

Cited by 17 publications

(8 citation statements)

References 39 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 4b shows the deconvolution of the Si 2p spectrum into sub-peaks that indicate binding energies of 101.8 and 102.9 eV, which are attributed to Si-C and Si-N, respectively. This finding is consistent with the coexistence of SiC and Si 3 N 4 evinced by XRD (Figure 3) [25,26]. The peaks at 284.7 and 285.7 eV in the high-resolution spectra of Figure 4c are assigned to C 1s, and the peak at 285.7 eV confirms the presence of SiC.…”

Section: Characterisation Of Sic and Sic/si3n4 Coatingssupporting

confidence: 88%

“…The peaks at 284.7 and 285.7 eV in the high-resolution spectra of Figure 4c are assigned to C 1s, and the peak at 285.7 eV confirms the presence of SiC. The other deconvolved sub-peak at 284.7 eV corresponds to C=C, which is attributed to graphite in the coatings [25][26][27]. In Figure 4d, the peak at 397.3 eV confirms the presence of Si3N4 [26,28].…”

Section: Characterisation Of Sic and Sic/si3n4 Coatingsmentioning

confidence: 87%

See 1 more Smart Citation

Addition of Si3N4 Strengthens SiC Coatings via Heat Treatment with Nitrogen Gas onto Carbon/Carbon Composites

Mao

Yang

2020

Coatings

View full text Add to dashboard Cite

We report the synthesis of SiC/Si3N4 coatings on carbon/carbon composites via pack cementation and heat treatment with nitrogen gas, the latter of which improves the coating wear resistance. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) are used to analyse the microstructure, surface morphology, chemical states and elemental distribution, respectively, of SiC and SiC/Si3N4 coatings. In addition, we analyse the tribological behaviour of the SiC and SiC/Si3N4 coatings and the related microstructure and wear mechanisms. The results show that SiC/Si3N4 coatings are compact and contain the three phases: Si3N4, SiC and C. Additionally, specimens with the SiC/Si3N4 coating have smaller, more stable friction coefficients and less weight loss than specimens with only the SiC coating. Adhesive wear and abrasive wear are the main wear mechanisms contributing to the higher friction coefficient of the SiC coating. Furthermore, with the SiC/Si3N4 coating, adhesive wear is the main wear mechanism causing a high friction coefficient at the initial stage of frictional wear. In the subsequent stages of frictional wear, the graphite in the SiC/Si3N4 coating generates a thin lubricating film that decreases the friction coefficient.

show abstract

Section: Characterisation Of Sic and Sic/si3n4 Coatingssupporting

confidence: 88%

Section: Characterisation Of Sic and Sic/si3n4 Coatingsmentioning

confidence: 87%

Addition of Si3N4 Strengthens SiC Coatings via Heat Treatment with Nitrogen Gas onto Carbon/Carbon Composites

Mao

Yang

2020

Coatings

View full text Add to dashboard Cite

show abstract

“…9(b). In comparison, the Si 2p XPS spectrum is split into two single-peaks corresponding to SiC (103.6 eV) and Si 3 N 4 (102 eV) existed in the sample from cross-section [20,[27][28][29]. Meanwhile, comparison of cross-section and surface of the EDS spectra in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…It is demonstrated that both of surface and cross-sections of porous Si 3 N 4 ceramics only contain C, O, Si, Y, and N, no characteristic peak of other elements. High resolution XPS spectra of Si 2p taking from the surface position, only have one peak at binding energy of 102 eV representing Si 3 N 4 [20,27], as shown in Fig. 9(b).…”

Section: Resultsmentioning

confidence: 99%

Microstructure and properties of porous Si3N4 ceramics by gelcasting-self-propagating high-temperature synthesis (SHS)

Chen

Wang

et al. 2021

J Adv Ceram

View full text Add to dashboard Cite

Porous silicon nitride ceramics have attracted a considerable attention due to their excellent overall performance, but poor porosity homogeneity and structural shrinkage induced by prolonged high temperature sintering limit its further application. Herein, as a three-in-one solution for the above issues, for the first time we develop a novel approach that integrates the merits of gelcasting-SHS (self-propagating high-temperature synthesis) to prepare porous Si3N4 ceramics to simultaneously achieve high porosity, high strength, high toughness, and low thermal conductivity across a wide temperature range. By regulating the solid content, porous Si3N4 ceramics with homogeneous pore structure are obtained, where the pore size falls inbetween 1.61 and 4.41 µm, and the elongated grains are interlaced and interlocked to form micron-sized coherent interconnected pores. At the same time, porous Si3N4 ceramics with porosity of 67.83% to 78.03% are obtained, where the compressive strength reaches 11.79 to 47.75 MPa and fracture toughness reaches 1.20 to 6.71 MPa·m1/2.

show abstract

“…In order to explore the compositional change of the hybrid nanofiber mats with different ZnO NPs content, FTIR is carried out (Figure 4(d)). The peaks at 3433 and 1643 cm −1 are related to the stretching vibration peak of OH, which is caused by moisture absorption 61,62 . The characteristic peak of CO at 1735 cm −1 is ascribed to methyl acrylate or methyl methacrylate that have been used in the synthesis of the PAN.…”

Section: Resultsmentioning

confidence: 99%

Preparation of 3D crimped ZnO/PAN hybrid nanofiber mats with photocatalytic activity and antibacterial properties by blow‐spinning

Chen

Jensen

et al. 2020

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Zinc oxide (ZnO) nanostructures have received widespread attention due to their unique structure and broad application possibilities, but high preparation costs and agglomeration limit their usage. In this article, low-cost and environmentally friendly cellulose and ZnCl 2 are used to synthesize ZnO nanoparticles (ZnO NPs). Subsequently, multifunctional ZnO/polyacrylonitrile hybrid nanofiber mats (ZnO/PAN@NFMs) with mechanical stability suitable for large-scale application are prepared via solution blow-spinning. The synthesized ZnO/PAN@NFMs exhibit higher photodegradation of organic dyes than earlier reported semiconductors and good recycling performance with an organic dye degradation above 94%-98% after five cycles, which is ascribed to fixation of the ZnO NPs in the nanofibers. In addition, the inhibition rate for Escherichia coli and Staphylococcus aureus is above 99.9% and the bacteriostatic rate against E. coli remains as high as 99% after 10 cycles. From these properties, the synthesized composite ZnO/PAN@NFMs are promising for wastewater cleaning and antibacterial fabrics.

show abstract

Synthesis and properties of self-assembled ultralong core-shell Si3N4/SiO2 nanowires by catalyst-free technique

Cited by 17 publications

References 39 publications

Addition of Si3N4 Strengthens SiC Coatings via Heat Treatment with Nitrogen Gas onto Carbon/Carbon Composites

Addition of Si3N4 Strengthens SiC Coatings via Heat Treatment with Nitrogen Gas onto Carbon/Carbon Composites

Microstructure and properties of porous Si3N4 ceramics by gelcasting-self-propagating high-temperature synthesis (SHS)

Preparation of 3D crimped ZnO/PAN hybrid nanofiber mats with photocatalytic activity and antibacterial properties by blow‐spinning

Contact Info

Product

Resources

About