Salt-induced anisotropic SrTiO3 to boost piezo-photocatalytic processes

IF 5.1 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2024-09-30 DOI:10.1016/j.ceramint.2024.09.386
Yuying Jiang, Huijun Ma, Ke Yang, Guifang Zheng, Zhenhui Ma
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Abstract

Piezo-photocatalysis materials that can combine the piezoelectric effect in photocatalytic processes are very attractive for promising applications in water splitting and contaminant degradation. The perovskite oxides with adjustable exposed crystal facets are expected to optimize the catalysis activities by exposing the high-energy planes. In this work, we develop a salt-assisted strategy that controllably prepares anisotropic SrTiO3 particles with a large number of surface defects, which exhibit good piezo-photocatalytic features. The exposure of the crystal facets can be tuned by changing the assistants (NaCl or SrCl2). The SrCl2 can lead to the exposure of the (110) plane in one-dimensional SrTiO3 particles and NaCl can induce the cubic SrTiO3 particles with the exposure plane of (200). Attributed to the exposed high-energy facets and abundant oxygen vacancies, the latter show higher activities than the former in both water splitting and dye degradation under light irradiation and ultrasonic vibration. Our work provides an approach to optimize piezo-photocatalytic activities by tuning the exposed crystal facets.
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盐诱导的各向异性 SrTiO3 可促进压电光催化过程
压电光催化材料可将压电效应与光催化过程相结合,在水分离和污染物降解方面具有广阔的应用前景。具有可调节暴露晶面的包晶氧化物有望通过暴露高能平面来优化催化活性。在这项工作中,我们开发了一种盐辅助策略,可控地制备出具有大量表面缺陷的各向异性 SrTiO3 粒子,这些粒子表现出良好的压电光催化特性。通过改变辅助剂(NaCl 或 SrCl2)可以调整晶体面的暴露程度。SrCl2 可使一维 SrTiO3 颗粒的(110)面曝光,而 NaCl 则可诱导立方 SrTiO3 颗粒的(200)面曝光。由于暴露的高能面和丰富的氧空位,后者在光照射和超声振动下的水分离和染料降解活性均高于前者。我们的工作提供了一种通过调整暴露晶面来优化压电光催化活性的方法。
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来源期刊
Ceramics International
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.
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