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首页> 外文期刊>Chemistry: A European journal >Overall Water Splitting on the Transition-Metal Oxynitride Photocatalyst LaMg1/3Ta2/3O2N over a Large Portion of the Visible-Light Spectrum
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Overall Water Splitting on the Transition-Metal Oxynitride Photocatalyst LaMg1/3Ta2/3O2N over a Large Portion of the Visible-Light Spectrum

机译：过渡金属氧氮化物光催化剂LaMg1 / 3Ta2 / 3O2N在可见光谱的大部分区域上的总水分解

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One of the main targets of studies on water splitting photocatalysts is to develop semiconductor materials with narrower bandgaps capable of overall water splitting for efficient harvesting of solar energy. A series of transitionmetal oxynitrides, LaMgxTa1-xO1+3xN2-3x (x >= 1/3), with a complex perovskite structure was reported as the first example of overall water splitting operable at up to 600 nm. The photocatalytic behavior of LaMg1/3Ta2/3O2N was investigated in detail in order to optimize photocatalyst preparation and water-splitting activity. Various attempts exploring photocatalyst preparation steps, that is, cocatalyst selection, coating material and method, and synthesis method for the oxide precursor, revealed photocatalyst structures necessary for achieving overall water splitting. Careful examination of photocatalyst preparation procedures likely enhanced the quality of the produced photocatalyst, leading to a more homogeneous coating quality and semiconductor particles with fewer defects. Thus, the photocatalytic activity for water splitting on LaMg1/3Ta2/3O2N was largely enhanced.
机译：水分解光催化剂研究的主要目标之一是开发具有窄带隙的半导体材料，该窄带隙能够整体分解水以有效地收集太阳能。据报道，一系列具有复杂钙钛矿结构的过渡金属氧氮化物LaMgxTa1-xO1 + 3xN2-3x（x> = 1/3）是可在高达600 nm的波长进行水分解的第一个实例。为了优化光催化剂的制备和水分解活性，详细研究了LaMg1 / 3Ta2 / 3O2N的光催化行为。探索光催化剂制备步骤的各种尝试，即助催化剂的选择，涂层材料和方法以及氧化物前体的合成方法，揭示了实现整体水分解所必需的光催化剂结构。仔细检查光催化剂的制备程序可能会提高生产的光催化剂的质量，从而导致涂层质量更加均匀，并且半导体颗粒的缺陷更少。因此，大大提高了水分解对LaMg1 / 3Ta2 / 3O2N的光催化活性。

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