Development of an automated SILAR method for the sustainable fabrication of BiOI/TiO2 photoanodes†

IF 3.2 Q2 CHEMISTRY, PHYSICAL
Energy advances Pub Date : 2024-09-05 DOI:10.1039/D4YA00405A
Roberto Altieri, Fabian Schmitz, Manuel Schenker, Felix Boll, Luca Rebecchi, Pascal Schweitzer, Matteo Crisci, Ilka Kriegel, Bernd Smarsly, Derck Schlettwein, Francesco Lamberti, Teresa Gatti and Mengjiao Wang
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引用次数: 0

Abstract

BiOI is a promising material for use in photoelectrocatalytic water oxidation, renowned for its chemical inertness and safety in aqueous media. For device integration, BiOI must be fabricated into films. Considering future industrial applications, automated production is essential. However, current BiOI film production methods lack automation and efficiency. To address this, a continuous automated process is introduced in this study, named AutoDrop, for producing BiOI films. Autodrop results to be a fast and facile method for producing BiOI photoelectrodes. Nanostructured thin films of this layered material are prepared using a syringe pump to dispense the precursor solution onto a continuously spinning substrate. These films are integrated into a multilayered photoelectrode, featuring mesoporous TiO2 as an electron-transporting layer on top of FTO glass. In testing the photoelectrochemical performance of the BiOI/TiO2 photoelectrodes, the highest photocurrent (44 μA cm−2) is found for a heterojunction with a BiOI thickness of 320 nm. Additionally, a further protective TiO2 ultrathin layer in contact with BiOI, grown by atomic layer deposition, enhances the durability and efficiency of the photoanode, resulting in a more than two-fold improvement in photocurrent after 2 hours of continuous operation. This study advances the automation in the sustainable production of photoelectrode films and provides inspiration for further developments in the field.

Abstract Image

Abstract Image

开发可持续制造生物氧化物/二氧化钛光阳极的自动化 SILAR 方法
BiOI 因其在水介质中的化学惰性和安全性而闻名,是一种有望用于光电催化水氧化的材料。为实现设备集成,必须将 BiOI 制成薄膜。考虑到未来的工业应用,自动化生产至关重要。然而,目前的 BiOI 薄膜生产方法缺乏自动化和效率。为解决这一问题,本研究引入了一种名为 AutoDrop 的连续自动流程,用于生产 BiOI 薄膜。结果表明,Autodrop 是一种快速、简便的生产 BiOI 光电电极的方法。使用注射泵将前驱体溶液分配到连续旋转的基底上,制备出这种层状材料的纳米结构薄膜。这些薄膜被集成到多层光电极中,其中介孔二氧化钛是 FTO 玻璃上的电子传输层。在测试 BiOI/TiO2 光电极的光电化学性能时,发现 BiOI 厚度为 320 纳米的异质结的光电流最高(44 μA cm-2)。此外,通过原子层沉积法在与 BiOI 接触处进一步生长的 TiO2 超薄保护层提高了光阳极的耐用性和效率,使其在连续工作 2 小时后的光电流提高了两倍多。这项研究推动了光电极薄膜可持续生产的自动化进程,并为该领域的进一步发展提供了灵感。
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CiteScore
1.80
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