Highly efficient visible light phenyl modified carbon nitride/TiO2 photocatalyst for environmental applications
Highly efficient visible light phenyl modified carbon nitride/TiO2 photocatalyst for environmental applications
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DOI：
10.1016/j.apsusc.2020.147394
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发表时间：
2020-11-30
影响因子：
6.7
通讯作者：
Ricci, Pier Carlo
中科院分区：
文献类型：
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作者：
Porcu, Stefania;Castellino, Micaela;Ricci, Pier Carlo
用于中和空气和水污染物的生态可持续解决方案越来越倾向于使用多相光催化剂。这种方法通过催化表面上的光驱动化学反应将污染物转化为无害物质，必须符合生态可持续性要求，并且易于应用。半导体光催化是一种很有前途的降解环境污染物的途径，而在众多半导体材料中，二氧化钛因其良好的光催化性能而成为环境修复的首选材料。然而，由于锐钛矿相的带隙相对较大，二氧化钛很难利用电磁光谱中的可见部分，因此，太阳光谱中的紫外线部分是其光催化活性的主要原因。在这里，我们展示了一种基于二氧化钛和苯基氮化碳(PHCN)的高效可见光复合催化剂。由于有机成分提供了高达600 nm的宽吸收和对二氧化钛导带的快速电荷交换，这种组合允许在可见光激发下高效地光催化降解罗丹明B。
Eco-sustainable solutions for the neutralization of air and water pollutants have increasingly gravitated toward the use of heterogeneous photocatalysts. This approach, which transforms pollutants into harmless substances through a light-driven chemical reaction on a catalytic surface, must comply with eco-sustainability requirements and be easily applicable. Semiconductor-based photocatalysis is a promising pathway for the degradation of environmental pollutants and, among all the various semiconductors used, titanium dioxide has proved itself to be the foremost material for environmental remediation due to its highly desirable photocatalytic properties. Titanium dioxide, however, poorly exploits the visible part of the electromagnetic spectrum due to the relatively large band-gap of its anatase phase, and as such, the UV portion of the solar spectrum is largely responsible for its photocatalytic activity. Herein, we demonstrate a highly efficient visible light hybrid catalyst based on titanium dioxide and phenyl carbon nitride (PhCN). With the organic component providing a broad absorption up to 600 nm and fast charge exchange to the conduction band of TiO2, the combination allows for the highly efficient photocatalytic degradation of Rhodamine B under visible excitation.