Development of photocatalytic active SiCN-Ti e-spun fibers based on a polysilazane-derived precursor for hydrogen generation by photoreforming

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-09-20 DOI:10.1016/j.jeurceramsoc.2025.117840

Bernardo Araldi da Silva , Eranezhuth Wasan Awin , Sergio Yesid Gómez González , Luiz Fernando Belchior Ribeiro , Regina de Fátima Peralta Muniz Moreira , Agenor De Noni Junior , Günter Motz

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引用次数: 0

Abstract

This study focuses on synthesizing novel photocatalytic active Ti-doped SiCN fibers using a TiO₂ precursor (titanium n-butoxide) and a commercially available silazane (Durazane 1800). The Ti-doped SiCN fibers were processed by combining the polymer-derived ceramic route and the electrospinning technique, which consists of controlling the polymerization of the precursors, electrospinning of the solutions, followed by thermal crosslinking and pyrolysis in a controlled atmosphere. Spectroscopic assessments revealed that the TiO₂ precursor reacts with N-H and Si-H groups from the polysilazane during cross-linking. In addition, thermogravimetric analysis (TGA) essays showed that adding TiO₂ increased ceramic yield upon pyrolysis. Free carbon (C_free) and TiO₂ enhanced the target photoactivated processes by increasing the fiber's light absorption range. The composites displayed a bandgap within the visible-light region and exhibited a 4-fold increment in hydrogen (H₂) generation through photoreforming. The composites developed herein are promising candidates for visible-light-driven hydrogen generation systems.

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基于聚硅氮烷衍生前驱体的光催化活性SiCN-Ti纤维的光重整制氢研究

本研究的重点是利用TiO2前驱体（n-丁氧化钛）和市售硅氮烷（Durazane 1800）合成新型光催化活性ti掺杂SiCN纤维。采用聚合物衍生陶瓷路线和静电纺丝技术相结合的方法制备了ti掺杂SiCN纤维，其中包括控制前驱体的聚合，静电纺丝溶液，然后在受控气氛下进行热交联和热解。光谱分析表明，TiO2前驱体在交联过程中与聚硅氮烷中的N-H和Si-H基团发生反应。此外，热重分析（TGA）论文表明，添加TiO2提高了热解后陶瓷的收率。游离碳（Cfree）和TiO2通过增加光纤的光吸收范围来增强目标光活化过程。复合材料在可见光区显示出一个带隙，通过光重整产生的氢（H2）增加了4倍。本文开发的复合材料是可见光驱动制氢系统的有希望的候选者。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.