A novel and highly efficient photocatalyst based on P25-graphdiyne nanocomposite.
A novel and highly efficient photocatalyst based on P25-graphdiyne nanocomposite.
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DOI：
10.1002/smll.201101686
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发表时间：
2012-01
期刊：
影响因子：
13.3
通讯作者：
Shuo Wang;Luoxin Yi;J. E. Halpert;X. Lai;Yuanyuan Liu;Hongbin Cao;R. Yu;Dan Wang;Yuliang Li-Yuliang
中科院分区：
文献类型：
--
作者：
Shuo Wang;Luoxin Yi;J. E. Halpert;X. Lai;Yuanyuan Liu;Hongbin Cao;R. Yu;Dan Wang;Yuliang Li-Yuliang
采用水热方法成功地将纳米二氧化钛(P25)与石墨二炔(GD)纳米片化学键合，形成了一种新型的纳米复合光催化剂。所制备的P25-Gd纳米复合材料在紫外光照射下对亚甲基蓝的降解表现出比P25和P25-碳纳米管复合材料以及目前众所周知的P25-石墨烯复合光催化剂更高的光催化活性。此外，P25-Gd还表现出相当大的可见光驱动光催化活性，因为P25与Gd之间形成的化学键有效地减小了P25的带隙，扩大了其可吸收的光范围。通过改变复合材料中Gd的含量可以调节P25-Gd的光催化活性，其最佳值约为0.6wt%。这种纳米复合光催化剂在空气净化和废水处理等领域具有潜在的应用前景。
Titania nanoparticles (P25) are successfully chemically bonded with graphdiyne (GD) nanosheets by a facile hydrothermal treatment, to form a novel nanocomposite photocatalyst. The as-prepared P25-GD nanocomposite exhibits higher photocatalytic activity for degrading methylene blue under UV irradiation than not only P25 and P25-carbon nanotube composite but also the current well-known P25-graphene composite photocatalysts. Moreover, P25-GD also shows considerable visible-light-driven photocatalytic activity, since the formation of chemical bonds between P25 and GD effectively decreases the bandgap of P25 and extends its absorbable light range. The photocatalytic activity of P25-GD can be adjusted by changing the content of GD in composites and the optimized value is about 0.6 wt%. Such a nanocomposite photocatalyst might find potential application in a wide range of fields including air purification and waste water treatment.