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首页> 外文期刊>Catalysis science & technology >The synergistic role of double vacancies within AgGaS2 nanocrystals in carrier separation and transfer for efficient photocatalytic hydrogen evolution
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The synergistic role of double vacancies within AgGaS2 nanocrystals in carrier separation and transfer for efficient photocatalytic hydrogen evolution

机译：两个空缺的协同作用AgGaS2纳米晶体在分离和载体高效光催化氢转移进化

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Vacancy engineering, a commonly used strategy to tune photocatalytic performances, has received tremendous attention. While enormous endeavors have demonstrated novel single-vacancy dependent photocatalysis phenomena, the influence of co-existence of multiple vacancies on photocatalysis remains relatively unexplored. Herein, a series of AgGaS2 nanocrystals featuring double-vacancy (silver vacancies and sulfur vacancies) characteristics have been successfully synthesized, where vacancy concentration control can be realized via simply adjusting the molar ratio of Ag and Ga precursors. The photocatalytic results show that the variation in the concentrations of double vacancies within the nanocrystals exerts a remarkable influence on photocatalytic hydrogen evolution, with the best performance in terms of efficient photocatalytic hydrogen production (up to 5.93 mmol g(-1) h(-1)) coming from the sample with Ag-P/Ga-P = 0.507. We further demonstrate how the double vacancies synergistically contribute to photocatalytic activity by affecting the separation and transfer efficiency of photo-generated carriers.
机译：空置的工程,一个常用的策略优化光催化性能,已收到巨大的关注。展示了小说依赖单一空位光催化现象的影响共处的多个职位空缺光催化是相对未知的。在此,一系列的AgGaS2纳米晶体double-vacancy(银空缺和硫磺职位空缺)已经成功地特征合成,空位浓度控制可以实现通过简单地调整摩尔比率Ag)和Ga的前兆。结果表明,该变化浓度的空缺的两倍纳米晶体产生显著的影响光催化氢进化,最好的用高效的光催化性能制氢(5.93更易与g (1) h (1))来自样例与Ag-P / Ga-P = 0.507。进一步证明双空缺导致光催化协同活动影响分离和转移photo-generated运营商的效率。

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