2025年2月27日出版的《结构化学》杂志发表了Dong-Kwon Lim研究小组的最新成果，他们提出了可见光响应金纳米粒子和纳米Bi₂O_3-x片杂合子结构用于N₂到NH₃的高效光催化转化。

在本研究中，小组探索了二维纳米Bi₂O_3-x和金纳米颗粒在NH₃可见光光生成中的应用。HRTEM和XPS结果表明，AuNP/Bi₂O₃-x杂合子结构中AuNP和纳米级Bi₂O_3-x的形成促进了界面处的载流子迁移率和电荷输运，使得纳米级Bi₂O_3-x的光催化活性比含有AuNP的微级Bi₂O_3-x提高了2.6倍。光催化性能的提高可归因于等离子体纳米粒子对可见光的吸收、快速电荷传输和迁移率（由于片状形貌）的显著增强以及AuNP/Bi₂O_3-x杂合子中氧空位对N₂的活化。通过对催化剂、浓度、pH和清除剂的系统实验研究，在优化条件下，杂合子结构的AuNP/n-Bi₂O_3-x光催化性能最高，NH₃的产率为432.5μmol g_cat^-1 h^-1。

据了解，在可持续环境应用的催化技术的进步，特别是替代目前的Haber-Bosch法的NH₃，最近得到了广泛的关注。光催化将氮气转化为NH₃主题太阳能虽然是一种环保的方法，但它具有低量子产率的局限性。二维铋基光催化剂具有比TiO₂更高的可见光吸收率和比MXene更高的稳定性，是近年来研究的热点。通过加入等离子体金纳米粒子改善可见光吸收性能可以增强铋基光催化剂的性能，而通过氧空位过程可以增强氮的吸附。

附：英文原文

Title: Visible-light responsive gold nanoparticle and nano-sized Bi₂O_3-x sheet heterozygote structure for efficient photocatalytic conversion of N₂ to NH₃

Author: anonymous

Issue&Volume: 2025-02-27

Abstract: The advancement in catalysis techniques for sustainable environmental applications, particularly an alternative to the current Haber-Bosch process for NH₃, has recently gained widespread attention. Although photocatalytic conversion of N₂ to NH₃ using solar energy is an eco-friendly method, it has the limitation of low quantum yield. Recently, 2D Bi-based photocatalysts have been an active research topic which exhibit higher visible light absorption than TiO₂ and higher stability than MXene. The performance of Bi-based photocatalysts can be enhanced through improved visible light absorption properties by incorporating plasmonic gold nanoparticles while nitrogen adsorption could be enhanced through oxygen vacancy processes. In the present study, we explore the application of 2D nano-sized Bi₂O_3-x and gold nanoparticles for visible light photo generation of NH₃. HRTEM and XPS reveal that the formation of AuNP and nano-sized Bi₂O_3-x in AuNP/Bi₂O_3-x heterozygote structure which promotes the charge carrier mobility and charge transport at the interface resulting in a 2.6-fold increase in the photocatalytic activity compared to micro-sized Bi₂O_3-x with AuNP. The improved photocatalytic performance can be ascribed to significant enhancement of visible light absorption by plasmonic nanoparticles, fast charge transport and mobility (due to sheet morphology) and the N₂ activation by oxygen vacancy in AuNP/Bi₂O_3-x heterozygote. Through a systematic experimental investigation involving catalysts, concentration, pH, and scavengers, the highest photocatalytic performance was achieved with the heterozygote structures of AuNP/n-Bi₂O_3-x under optimized conditions, yielding 432.5 μmol g_cat^-1 h^-1 of NH₃.

DOI: 10.1016/j.cjsc.2025.100564

Source: http://cjsc.ac.cn/cms/issues/771