TaCxOy: A photocatalytic promoter on g-C3N4 for visible-light Cr6 reduction
TaCxOy: A photocatalytic promoter on g-C3N4 for visible-light Cr6 reduction
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TaCxOy：g-C3N4 上用于可见光 Cr6 还原的光催化促进剂
DOI：
10.1016/j.catcom.2018.10.020
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发表时间：
2019
影响因子：
3.7
通讯作者：
Li Liping
中科院分区：
文献类型：
--
作者：
Zhang Nannan;Li Guangshe;Wang Shuo;Xu Xingliang;Li Liping
石墨碳氮化物（g-C3 N4）是一种很有前途的可见光光催化剂，但由于其高的电子-空穴对复合速率，活性较低。在这里，微量非晶Ta 2 O 5改性的TaC（TaCxOy）原位锚定在g-C3 N4（TaCxOy/g-C3 N4）作为一种有效的光催化剂，以提高电荷分离。TaCxOy的引入使TaCxOy/g-C3 N4具有良好的能带排列和更多的活性位暴露。具体而言，4.4wt%TaCxOy/g-C3 N4包含在35分钟内100%的最佳Cr 6+还原转化率，与裸TaCxOy和g-C3 N4相比，提高了49.3和2.4倍。本研究表明TaCxOy在水处理和光能转化方面具有良好的促进作用。
Graphitic carbon nitride (g-C3N4) is a promising visible light photocatalyst but bears low activity due to its high recombination rate of electron-hole pairs. Here, trace amorphous Ta2O5modified TaC (TaCxOy) is in situ anchored on g-C3N4(TaCxOy/g-C3N4) as an efficient photocatalyst to enhance charge separation. Introducing of TaCxOyendows TaCxOy/g-C3N4with favorable band alignment and more exposed active sites. Specifically, 4.4 wt% TaCxOy/g-C3N4embraces an optimal Cr6+reduction conversion of 100% in 35 min, 49.3 and 2.4-fold enhancement, compared with bare TaCxOyand g-C3N4. Our work indicates that TaCxOycould be a promoter in water treatment and photo-energy conversion.