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光催化分解水可以将太阳能直接转化为氢能,是一种有效利用太阳能的途径。开发用于太阳能制氢的高效且稳定的光催化剂是光催化研究领域的重要目标之一。钽基氮氧化物具有窄的带隙宽度,并且光生电子和空穴的势能足够用来分解水,因此该类光催化剂最有可能实现太阳能制氢。到目前为止,全世界的研究小组对钽基氮氧化物光催化剂进行了系统而深入的研究,取得了大量的成果。然而,钽基氮氧化物的太阳能制氢效率还远远低于理论值。如何更好地设计这些材料进而提高其太阳能制氢效率这一命题是十分重要和有意义的。本文总结了钽基氮氧化物用于光催化制氢的研究和发展过程,着重分析了用于提高光催化分解水效率的各种方法。最后,探讨了窄带隙钽基氮氧化物光催化分解水研究领域的未来发展趋势。
Photocatalytic decomposition of water can be solar energy directly into hydrogen, is an effective way to use solar energy. The development of efficient and stable photocatalysts for solar hydrogen production is one of the important goals in the field of photocatalysis. Tantalum-based oxynitrides have a narrow bandgap width and the potential energy of photogenerated electrons and holes is sufficient to decompose water, so that such photocatalysts are most likely to generate hydrogen from the solar energy. So far, the world’s research team conducted a systematic and in-depth study of tantalum based nitroxide photocatalysts, and achieved a great deal of results. However, the hydrogen production efficiency of tantalum-based oxynitrides is far below the theoretical value. The proposition of how to better design these materials to improve their solar hydrogen production efficiency is very important and meaningful. This paper summarizes the research and development of tantalum-based oxynitride for photocatalytic hydrogen production, and focuses on various methods for improving the efficiency of photocatalytic decomposition of water. Finally, the future development trend of narrow bandgap tantalum nitroxide photocatalytic decomposition water is discussed.