Preparation of barium titanate hollow particle by two-step chemical solution deposition

Abstract

Barium titanate (BTO) hollow particles were prepared using two-step chemical solution deposition with a template particle. Polystyrene (PSt) was selected as the template particle, and N-(hydroxymethyl)acrylamide (HMAm) was polymerized as a comonomer to generate the hydrophilic group on the PSt template particle surface. The BTO monophase was attained at [Ba]/[TiO 2 ] = 1.0 using 350°C pre-annealed TiO 2 precursor hollow particles. The obtained BTO particle was a hollow structure with shell thickness of approximately 45 nm. The surface area of the obtained BTO hollow particle was 12 m 2 /g, which was approximately twice as large as that of alkoxide-derived BTO particles created with the same annealing temperature.

Suppressing Electrolyte Decomposition at Cathode/Electrolyte Interface by Mg-Fe Binary Oxide Coating towards Room-Temperature Magnesium Rechargeable Battery Operation

“…29 Herein, we develop a nano-spinel MMO cathode material coated with MFO. Due to the high reactivity between the MFO/MMO interface, a subsequent coating process is performed using alkoxides 30 (Fig. 1): i) Mg alkoxide reacts with MMO surface by dispersing MMO into Mg alkoxide solution, followed by hydrolysis to form Mg hydroxide-coated MMO; ii) Fe alkoxide reacts with the Mg-rich surface in a similar manner to form Mg-Fe bilayer coated MMO; iii) Low temperature calcination promoting the dehydration to obtain Mg-Fe binary oxide-coated MMO (MFO@MMO).…”

Probing the Interface Activation in Designing Defect-Free Multilayered Polymer Nanocomposites for Dielectric Capacitor Applications

“…The BT NPs were synthesized via a hydrothermal reaction, as reported earlier . Briefly, a uniform mixture of 2.7401 g of Ba­(OH) 2 ·8H 2 O and 0.3466 g of TiO 2 (molar ratio of Ba/Ti = 2) was prepared in a 40 mL solution of ethanol and deionized (DI) water (ethanol = 80 vol %) by stirring for 30 min (pH = 13.5) followed by hydrothermal treatment at 210 °C for 48 h. The obtained product after cooling was washed with 0.1 M HCl to remove excess Ba 2+ ions and any BaCO 3 formed during the reaction as an impurity and DI water each three times and dried in an oven at 60 °C for 24 h. , …”