CeO2 fiber catalysts for diesel soot capture and highly efficient combustion

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-05-01 DOI:10.1016/j.ceramint.2025.01.512

Chenyu Mi , Zhenfeng Guo , Longfei Li , Xiaoqing Wang , Yunguang Yin , Benxue Liu , Guanghui Zhang , Luyi Zhu , Yongshuai Xie , Gang Yu , Xinqiang Wang

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引用次数: 0

Abstract

Diesel vehicle exhaust contains a lot of harmful substances, but the use of diesel engines is inevitable because of its high cost-effectiveness, good durability, low CO₂ emissions, and high efficiency. Thus, it is very important to capture and catalyze soot particles. In this study, CeO₂ fiber catalysts with one-dimensional structure were prepared by sol-gel method combined with electrospinning technology. Due to the fibrous morphology, CeO₂ fiber catalysts could well intercept soot particles and increase the contact sites between catalyst and soot. Those fiber catalysts had large specific surface areas, excellent aspect ratios, self-supporting ability and high porosity, which were beneficial for soot combustion. Among all the catalysts, CeO₂-500 showed the best catalytic performance which was 350 °C for T₁₀, 385 °C for T₅₀, 415 °C for T₉₀ and 98.64 % for S_CO2. The temperature T_m corresponding to the maximum combustion rate is 387 °C. The results indicate that the CeO₂ fiber catalyst has excellent catalytic performance and good development prospect, which provides a new idea for the further development of diesel vehicle exhaust gas treatment in the future.

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CeO2纤维催化剂用于柴油烟尘捕获和高效燃烧

柴油车尾气中含有大量有害物质，但由于其性价比高、耐久性好、CO2排放低、效率高，使用柴油发动机是不可避免的。因此，捕获和催化煤烟颗粒是非常重要的。本文采用溶胶-凝胶法结合静电纺丝技术制备了具有一维结构的CeO2纤维催化剂。CeO2纤维催化剂由于其纤维形态，可以很好地拦截烟尘颗粒，增加催化剂与烟尘的接触位点。这些纤维催化剂具有较大的比表面积、优良的长径比、自持能力和高孔隙率，有利于煤烟燃烧。其中CeO2-500对T10、T50、T90和SCO2的催化性能最佳，分别为350℃、385℃、415℃和98.64%。最大燃烧速率对应的温度Tm为387℃。结果表明，CeO2纤维催化剂具有优异的催化性能和良好的发展前景，为今后柴油车尾气处理的进一步发展提供了新的思路。

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

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.