Doping Ce(OH)CO3 laminated dendrites with Fe, Co and Ni for defect steered wide-frequency microwave absorption

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

“…While in the centre of nanofibers, the distances are 3.12 Å and 1.91 Å, corresponding to the (111) and (220) planes of cubic CeO 2 . 14,17 Fig. 1b4 shows the monocrystal nanoparticles on the nanofiber surfaces with the same spacing of 3.25 Å between lattice stripes as those at nanofiber edges, also in relation to the (110) planes of hexagonal Ce(OH) 3 .…”

“…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

“…[28,29] Ceria-based compounds (i.e., CeO 2 , Ce 2 O 3 ) have a wide range of applications in catalysis, [30] oxygen sensors, [31] fuel cells, [32] biomedicine, [33][34][35] and microwave absorption due to lanthanide contraction, 4f electrons, high abundance, and abundant defects-properties that make them useful. [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. In general, the appearance of oxygen vacancies and free electrons, followed by a change of oxidation state from Ce 4+ to Ce 3+ , can balance the polarization and conductivity loss, [37,39,42] thus enhancing microwave aptitude performance. Therefore, cerium-based compounds are considered promising materials in the field of microwave absorption.…”