Comparison of the microwave absorption performance of core–shell SiO₂@C and hollow carbon nanospheres with different sizes

Abstract

Microwave absorption performance and mechanisms of core–shell SiO2@C and hollow carbon nanospheres with different sizes.

Platinum Cluster Decoration on Hollow Carbon Spheres for High-Efficiency Hydrogen Evolution Reaction

“…As shown in Figure S5, the broad peak at 21.5° confirms the successful synthesis of SiO 2 (JCPDS card no. 27-0605) . The peak at 16° for the Pt y /HCSs-4 patterns (Figure S5) is associated with the facet of typical hard carbon, while the peaks at 30 and 43° are ascribed to the (002) and (111) facets of carbon, respectively.…”

“…27-0605). 38 The peak at 16°for the Pt y /HCSs-4 patterns (Figure S5) is associated with the facet of typical hard carbon, while the peaks at 30 and 43°are ascribed to the (002) and (111) facets of carbon, respectively. This demonstrates that the PDA layer is completely converted into carbon after annealing in Ar and coupled with the etching process.…”

Fabrication of iron manganese metal–organic framework derived magnetic MnFe2O4/C composites for broadband and highly efficient electromagnetic wave absorption

“…Polarization relaxation is a key factor affecting the dielectric properties of materials. Based on the following formula, the Cole–Cole curve can be plotted: 29,47 According to Debye's principle, the phenomenon of polarization relaxation can be demonstrated when a Cole–Cole semicircle occurs. 48,49 As presented in Fig.…”

Enhancing the microwave absorption performance of graphite/Al2O3 composites through manipulating sheet resistance

“…The other type of dielectric loss absorbing material is usually composed of a certain proportion of a matrix mixed with dielectric absorbents, such as silicon carbide, titanium silicon carbon, graphene, and zinc oxide. [17][18][19][20][21][22] Its density is small and its weight is relatively light, but its absorption performance is often affected by factors, such as frequency, thickness, and processing technology. At the same time, some absorbing materials can only exhibit excellent absorption performance within a narrow band range, making it difficult to meet the requirements of practical applications.…”