Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides,Inorganic Chemistry

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Single-Source Precursors for the Controlled Aqueous Synthesis of Bismuth Oxyhalides
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-06-02 , DOI: 10.1021/acs.inorgchem.3c01114
Matthew N Gordon ₁ , Yanyao Liu ₁ , M Kevin Brown ₁ , Sara E Skrabalak ₁

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Bismuth oxyhalides are a promising class of photocatalysts for harvesting solar energy. These materials are often synthesized in aqueous media with poor synthetic control resulting from the extremely fast nucleation and growth rates of the particles. These fast rates are caused by the rapid precipitation of bismuth salts with free halide ions. We have developed water-soluble precursors combining bismuth with either chlorine or bromine atoms in the same metal–organic complex. With the application of heat, halide ions are released, which then precipitate with bismuth ions as BiOX (X = Cl, Br). By controlling the halide ion formation rate, the nucleation and growth rates of BiOX materials can be tuned to provide synthetic control. The diverse potential of these precursors is demonstrated by synthesizing BiOX in three ways: aqueous colloidal synthesis, solid-state decomposition, and fabrication of films of BiOX via spray pyrolysis of the aqueous precursor solutions. These broadly applicable single-source precursors will enhance the ability to synthesize future BiOX materials with controlled morphologies.

中文翻译：

用于可控水相合成卤氧化铋的单源前驱体

卤氧化铋是一类很有前途的用于收集太阳能的光催化剂。这些材料通常在水性介质中合成，由于颗粒的成核和生长速率极快，因此合成控制较差。这些快速速率是由铋盐与游离卤化物离子的快速沉淀引起的。我们开发了将铋与氯或溴原子结合在同一金属有机络合物中的水溶性前体。通过加热，卤化物离子被释放，然后与铋离子一起沉淀为 BiOX (X = Cl, Br)。通过控制卤化物离子的形成速率，可以调节 BiOX 材料的成核和生长速率以提供合成控制。通过三种方式合成 BiOX 证明了这些前体的不同潜力：水胶体合成、固态分解，以及通过前体水溶液的喷雾热解制备 BiOX 薄膜。这些广泛适用的单一来源前体将增强合成未来具有受控形貌的 BiOX 材料的能力。

更新日期：2023-06-02

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