Oxygen vacancy boosted microwave absorption in CeO2 hollow nanospheres

Variable-Temperature Regulation of NiCo2S4/Mn3O4 Nanostructured Composites for High-Performance Microwave Absorption

“…The electromagnetic attenuation mechanism of the NiCo 2 S 4 /Mn 3 O 4 nanostructured composite was revealed based on the measured electromagnetic parameters. − Generally, the real parts of the complex permittivity and complex permeability (ε′ and μ′) represent the capacity of electromagnetic energy storage and the imaginary parts (ε″ and μ″) represent the dissipative capacity. The electromagnetic parameters of pure NiCo 2 S 4 are shown in Figure S7.…”

Synchronously boosting microwave-absorbing and heat-conducting capabilities in CeO2/Ce(OH)3 core–shell nanorods/nanofibers via Fe-doping amount control

“…[1][2][3][4][5][6][7][8][9][10] In response, multi-functional materials integrated with heat conduction and EM wave (EMW) absorption are at the core of pertinent research. However, most of the research in this field centres on uni-functional materials, i.e., either EMW absorbing materials [4][5][6][7][8][9][10][11][12][13][14][15][16] or heat conducting materials. 1,3 Some heat conductance-microwave absorption integrated materials have now been successfully developed; 2 nevertheless, the synchronous improvement in heat conductance and EMW absorption is still challenging to achieve due to their incompatibility, as demonstrated in the following aspects.…”

“…Cerium-based compounds (containing Ce(OH) 3 , Ce 2 O 3 , and CeO 2 ) have promising applications as gas sensors, industrial catalysts, and solid oxide fuel cells due to their abundant defects, 4f electrons, and lanthanide contraction effect. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Besides, cerium-based compounds can function as microwave absorbers due to polarization loss induced by oxygen vacancy defects. But they still do not have a wide range of applications since they bear a narrow bandwidth (EABW/d = 0.06-3.85 GHz mm À1 ), a thick thickness (2.0-6.5 mm), and a high filling ratio (450%) owing to the lack of ferromagnetic resonances and/or polarizations.…”

“…But they still do not have a wide range of applications since they bear a narrow bandwidth (EABW/d = 0.06-3.85 GHz mm À1 ), a thick thickness (2.0-6.5 mm), and a high filling ratio (450%) owing to the lack of ferromagnetic resonances and/or polarizations. To improve the EMW absorbing capabilities (EMWACs), several methods such as morphology control, [14][15][16] doping with other atoms (Fe, 17 Zn, 18 Co 19 ), Ce-doped ferrites, [20][21][22] and combining with CNT, 23,24 rGO, 19 PANi, 25 MoS 2 , 26 Co 3 O 4 , 27 and Fe 28 have been adopted. However, the as-obtained EMWACs fail to fulfil the requirements of practical application.…”

CuCeO Bimetallic Oxide Rapidly Treats Staphylococcus aureus‐Infected Osteomyelitis through Microwave Strengthened Microwave Catalysis and Fenton‐Therapy

“…[36,37] Cerium-based compounds are dielectric microwave absorption materials with electromagnetic wave absorption mechanisms stemming from dielectric polarization, dielectric relaxation, and conductive losses. Currently, there are several approaches to improving the electromagnetic impedance matching capability of cerium-based compound composites including morphology and size control, [38] heteroatom doping, [39] defect engineering, [40] and heterostructure construction. [41] Adding additional components, such as noble or non-precious metal oxides, on top of CeO 2 , has become another strategy for achieving better catalytic performance.…”