Department of Chemistry, School of Science, Tianjin University, Tianjin 300350, People's Republic of China.
Nanotechnology. 2017 Dec 8;28(49):495710. doi: 10.1088/1361-6528/aa929a.
A simple and convenient method was used to synthesize a graphitic carbon nitride (g-CN) nanoporous-tube by using SiO nanoparticles as pore formers. The structure of the g-CN nanoporous-tube was characterized by the SEM and TEM images. Taking photodegradation of RhB as an example, the photocatalytic activity of the as-prepared g-CN nanoporous-tube was investigated. It can photodegrade 90% RhB in 40 min under visible-light irradiation and obtain a k value of 0.04491 min, which is 8.16 times that of bulk g-CN, 3.09 times that of tubular g-CN and 1.48 times that of tubular g-CN-SiO. The significant enhancement in photocatalytic efficiency is due to the edge effect of the pores and the special structure of the tubes. In addition, the possible mechanism of photocatalytic degradation of RhB was also proposed based on the trapping experiment of active species, which indicated that the superoxide radicals ([Formula: see text]) and the holes (h ) were the main reactive species in this photocatalyst. This work may open up a new idea of innovation in g-CN structure and inspire its follow-up study.
一种简单便捷的方法被用来合成一种石墨相氮化碳（g-CN）纳米管，其方法是使用 SiO 纳米颗粒作为孔形成剂。g-CN 纳米管的结构通过 SEM 和 TEM 图像进行了表征。以 RhB 的光降解为例，研究了所制备的 g-CN 纳米管的光催化活性。在可见光照射下，它可以在 40 分钟内将 90%的 RhB 光降解，并获得 0.04491 min 的 k 值，这分别是体相 g-CN 的 8.16 倍、管状 g-CN 的 3.09 倍和管状 g-CN-SiO 的 1.48 倍。光催化效率的显著提高归因于孔的边缘效应和管的特殊结构。此外，还基于活性物种的捕获实验提出了 RhB 光催化降解的可能机制，表明超氧自由基 ([Formula: see text]) 和空穴 (h ) 是该光催化剂中的主要活性物种。这项工作可能为 g-CN 结构的创新开辟了新思路，并激发了其后续研究。
