A template induced method to synthesize nanoporous graphitic carbon nitride with enhanced photocatalytic activity under visible light
作者:Qianjing Fan、Jianjun Liu、Yingchun Yu、Shengli Zuo
DOI:10.1039/c4ra12033g
日期:——
A template induced method was developed to synthesize nanoporous graphitic carbon nitride (npg-CN) by directly heating Triton X-100-modified-melamine sulfate. The effects of the added amount of Triton X-100 and heating temperature on the formation of npg-CN were investigated. The npg-CN samples were characterized by XRD, FT-IR, and elemental analysis; nitrogen adsorption isotherms, SEM and TEM images; and UV-vis DRS and photoluminescence spectra. The results showed that the npg-CN samples possessed a laver-like layered structure with a high surface area (50–135 m2 g−1). Meanwhile, compared to the bulk g-CN (synthesized by directly heating melamine), the npg-CN samples possessed stronger optical absorptions, narrower band gaps, and significantly reduced fluorescence intensity. The photocatalytic activity was investigated by degradation of Rhodamine B under visible light irradiation. As a result, the photodegradation rate of Rhodamine B dye on the npg-CN samples was greatly improved over that on bulk g-CN.
开发了一种模板诱导方法,通过直接加热 Triton X-100 改性三聚氰胺硫酸盐来合成纳米多孔石墨氮化碳(npg-CN)。研究了Triton X-100的添加量和加热温度对npg-CN形成的影响。通过 XRD、FT-IR 和元素分析对 npg-CN 样品进行了表征;氮气吸附等温线、SEM 和 TEM 图像;以及紫外可见 DRS 和光致发光光谱。结果表明,npg-CN样品具有紫菜状层状结构,具有高表面积(50-135 m2 g−1)。同时,与块状g-CN(直接加热三聚氰胺合成)相比,npg-CN样品具有更强的光学吸收、更窄的带隙和显着降低的荧光强度。通过可见光照射下罗丹明 B 的降解来研究其光催化活性。结果,罗丹明 B 染料在 npg-CN 样品上的光降解率比在块状 g-CN 上的光降解率大大提高。