CO2 photoreduction using encapsulated potassium bismuth iodide (K3Bi2I9) perovskite in porous supports

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

Ceramics International Pub Date : 2024-10-01 DOI:10.1016/j.ceramint.2024.09.434

Edith Luévano-Hipólito , Oscar L. Quintero-Lizárraga , Leticia M. Torres-Martínez

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引用次数: 0

Abstract

Lead-free halide perovskites (LFHP) are one of the most promising materials for CO₂ photoreduction; however, their stability is an issue that must be solved to scale up the manufacturing. To overcome this limitation, this work proposes the encapsulation of LFHP of K₃Bi₂I₉ in three inorganic supports based on aluminosilicates such as (i) geopolymer, (ii) tobermorite, and other based on (iii) magnesium oxychloride. These supports provide a porous structure and active sites to host the perovskite particles, which favor enhanced light absorption, stability, and their activity for CO₂ reduction under visible light. The encapsulated perovskites exhibited activity to photoconvert CO₂ into formic acid (HCOOH) with efficiencies up to 2500 μmol h⁻¹ using the K₃Bi₂I₉ host in geopolymer. This support provides stable polysialate-diloxo chains to encapsulate the perovskite, delayed the degradation in aqueous medium, and its activity was demonstrated during 16 h of continuous visible light irradiation. The good stability and efficiency for CO₂ reduction was associated to the formation of K₃Bi₂I₉/BiOI heterojunction that prevent the degradation of the structure and enhance the charge transfer between both semiconductors.

查看原文本刊更多论文

利用多孔支撑物中的封装碘化铋钾 (K3Bi2I9) 包晶进行二氧化碳光致还原

无铅卤化物过氧化物（LFHP）是最有前途的二氧化碳光生化材料之一；然而，要扩大生产规模，必须解决其稳定性问题。为了克服这一局限性，本研究提出将 K3Bi2I9 的低氟磷酸盐封装在三种基于铝硅酸盐的无机支撑物中，如 (i) 土工聚合物、(ii) 托贝莫来石和其他基于 (iii) 氧氯化镁的无机支撑物。这些支撑物具有多孔结构和活性位点，可容纳包光体颗粒，有利于增强光吸收、稳定性及其在可见光下还原二氧化碳的活性。封装的包晶表现出了将 CO2 光转化为甲酸（HCOOH）的活性，使用土工聚合物中的 K3Bi2I9 宿主，光转化效率高达 2500 μmol h-1。这种支撑物提供了稳定的聚ialate-diloxo 链来封装包晶，延缓了包晶在水介质中的降解，并在连续 16 小时的可见光照射下证明了其活性。二氧化碳还原的良好稳定性和效率与 K3Bi2I9/BiOI 异质结的形成有关，这种异质结可以防止结构降解，并增强两种半导体之间的电荷转移。

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.