A construction strategy of ferroelectrics by the molten salt method and its application in the energy field

Abstract

<p>The critical issues and the recent progress of molten salt preparation of ferroelectrics and their application in the energy field.</p>

2D-C3N4 encapsulated perovskite nanocrystals for efficient photo-assisted thermocatalytic CO2 reduction

“…Two main peaks at 724.5 and 738.4 eV can be detected and come from the Cs 3d 5/2 and 3d 3/2 signals. 14,15 However, a slight shift to higher binding energy can be detected for m-CN@CsPbBr 3 , further confirming the above mutual interaction between m-CN and CsPbBr 3 . In the Pb 4f XPS result in Fig.…”

“…14 b It should be mentioned that most of the reported halide perovskite nanocrystals (NCs) were prepared by the solution method using organic solvents, which is troublesome for large-scale production. 15 a , b Besides, considering that thermocatalysis usually outperforms photocatalysis in CO 2 reduction, it would be intriguing to explore the catalytic activity of CsPbBr 3 under coupled thermal and irradiation effects. To the best of our knowledge, there are few reports of water-stable CsPbBr 3 -based thermal CRR with H 2 O as a reducing agent.…”

Recent Developments on Molten Salt Synthesis of Inorganic Nanomaterials: A Review

“…The increased chemical reactivity of precursors in molten salts is attributed to the enhanced ionic mobility (diffusion rate on the order of 10 –5 to 10 –8 cm 2 s –1 ) and contact area of reactants in the presence of molten salts . On the other hand, the TMSS method (Figure b) employs asymmetric reactants with weak solubility in chosen molten salts as template, and therefore, one can control the morphology of designated products via the recombination of local basic unit . Compared with the conventional MSS, the TMSS has the additional advantage for more easily controlling the size and shape of produced particles. ,, For example, the TMSS was found to be extremely efficient to synthesize low-dimension symmetrically oriented ferroelectrics which is otherwise difficult to obtain from general chemical synthesis methods. , …”

“…Reproduced with permission from Elsevier) and (b) the TMSS (Copyright 2020. Reproduced with permission from the Royal Society of Chemistry) …”

Crystal Structure and Ferroelectric Evidence of BaZnSi3O8, a Low‐Permittivity Microwave Dielectric Ceramic

“…[1,2,3] In the extremelyh igh-frequency millimeterwave band, dielectric materials should possess low permittivity, very low dielectric loss, andn ear zero-temperature coefficients of resonant frequency,s oa st oi mprove the information transmission rate of devices,e nhancet he frequency selection, reduce the energy consumption,a nd ensure the workings tability of resonanta nd transmissions ignals. [4,5] Ferroelectric ceramics are widely used in piezoelectricity, [6,7] electronic tunable devices, [8] energy storage, [9] ando ther fields because of their spontaneous polarization effect. However,t he existence of domains in ferroelectric materials reduces the quality factor (Q)o f microwaves ignal transmission,r esulting in large dielectric loss.…”