Yao Xu, Haifeng Wang, Yixiao Qiu, Jiaming Zhang, Jifang Zhang, Ke Shi, Xiaowei Tao, Zihao Zhang, Meng Liu, Chao Xu* and Guijun Ma*,
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On-Site Growth of a TaON Nanoshell on ZrO2 Particles for Photocatalytic Water Splitting
Low-dimensional nanostructuring has emerged as a promising approach to enhance the photocatalytic performance of transition metal oxynitrides, a class of widely investigated visible-light-responsive photocatalysts. Despite their potential, the synthesis of nanostructured oxynitride materials remains a great challenge. In this study, we present a novel NH4Cl-assisted vacuum nitridation method for in situ growth of an ultrathin TaON layer on particulate ZrO2, resulting in the formation of TaON@ZrO2 core@shell nanostructures. By controlling the Ta metal content in the precursor, the thickness of the TaON shell can be adjusted within the range of 1–3 nm. Comprehensive Raman spectroscopy and EXAFS analyses confirm the successful synthesis of well-defined and phase-pure TaON nanocrystals. Compared to conventional bulk TaON particles, the nanostructured TaON@ZrO2 exhibits significantly enhanced photocatalytic activity for visible-light-driven water splitting. Surface photovoltage measurements further demonstrate improved charge separation efficiency, which is attributed to the unique nanostructure design. This work not only provides a robust strategy for the controlled synthesis of TaON@ZrO2 nanoparticles but also underscores the critical role of nanostructuring in optimizing the water splitting performance of oxynitride-based photocatalysts.
期刊介绍:
ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.