Acid-regulated hydrolysis and condensation of titanium cation toward controllable synthesis of multiphase mesoporous TiO2 for effectively enhance photocatalytic H2 evolution

Sun, Mingxuan; Zhou, Hongru; Xiong, Hailong; Zhang, Rui; Liu, Zhilin; Li, Dongni; Gao, Bo; Qiao, Zhen‐An

doi:10.1016/j.cattod.2022.05.032

Cited by 4 publications

(1 citation statement)

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“…Meanwhile, owing to the extremely high activity of Ti alkoxides, their solutions cannot form a stable electric double layer. [32][33][34] Therefore, conventional electrospinning with Ti-series sols normally employs acetic acid (HAc) or acetylacetone coordination to reduce the activity of Ti alkoxides, whereas a nonaqueous system is used to reduce the hydrolysis degree and improve the stability of the Ti-series sols. [35][36][37] However, the sol stability is still poor, and white smoke will be formed when the sols are exposed to moisture.…”

Section: Synthesis Of Ti-series Oxide Nanofiber Spongesmentioning

confidence: 99%

Way to a Library of Ti‐Series Oxide Nanofiber Sponges that are Highly Stretchable, Compressible, and Bendable

Cheng,

Chang,

Zhang

et al. 2023

Advanced Materials

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Ti‐series oxide ceramics in the form of aerogels, such as TiO2, SrTiO3, BaTiO3, and CaCu3Ti4O12, hold tremendous potential as functional materials owing to their excellent optical, dielectric, and catalytic properties. Unfortunately, these inorganic aerogels are usually brittle and prone to pulverization owing to weak inter‐particulate interactions, resulting in restricted application performance and serious health risks. Herein, a novel strategy is reported to synthesize an elastic form of an aerogel‐like, highly porous structure, in which activity‐switchable Ti‐series oxide sols transform from the metastable state to the active state during electrospinning, resulting in condensation and solidification at the whipping stage to obtain curled nanofibers. These curled nanofibers are further entangled when flying in the air to form a physically interlocked, elastic network mimicking the microstructure of high‐elasticity hydrogels. This strategy provides a library of Ti‐series oxide nanofiber sponges with unprecedented stretchability, compressibility, and bendability, possessing extensive opportunities for greener, safer, and broader applications as integrated or wearable functional devices. As a proof‐of‐concept demonstration, a new, elastic form of TiO2, composed of both “white” and “black” TiO2 nanofiber sponges, is constructed as spontaneous air‐conditioning textiles in smart clothing, buildings, and vehicles, with unique bidirectional regulation of radiative cooling in summer and solar heating in winter.

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