Ma Yuli, Ouyang Tong, Chen Ou-Po, Chen Chih-Kuei, Chang Chang-Tang
J Nanosci Nanotechnol. 2014 Apr;14(4):2734-40. doi: 10.1166/jnn.2014.8632.
Polyaniline/titanium nanotube composite (PANI/TNT) photocatalysts were prepared by 'in situ'chemical oxidative polymerization of aniline. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform IR spectra (FTIR) and UV-Visible spectroscopy measurements were used to characterize the obtained photocatalysts, and their photocatalytic activities were investigated by degrading Reactive Green19 (RG19) under near visible light irradiation (lambda = 365 nm). The content of PANI, pH, dosage, and concentration of RG19 were also investigated. The results showed that the inner diameter of the PANI/TNT was 6 nm and that the PANI did not change the structure of the TNT. The PANI was coated on the surface of the TNT. The light response of the PANI/TNT was extended to the visible-light regions. Among the six different kinds of photocatalysts, the 1.17 wt% PANI/TNT had the best performance in treating 10 ppm RG19. The best pH is 3 for the largely protonated surface of the composite at low pH. The adsorption amount was increased as the dosage increased. The decolonization efficiency decreased with increasing initial RG19 concentration. The performance of the photocatalyst in decomposing RG19 was stable after 5 time cycles.
通过苯胺的“原位”化学氧化聚合制备了聚苯胺/钛纳米管复合材料（PANI/TNT）光催化剂。采用透射电子显微镜（TEM）、X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）和紫外-可见光谱测量对所得光催化剂进行了表征，并通过在近可见光照射（λ = 365 nm）下降解活性绿19（RG19）研究了它们的光催化活性。还研究了PANI的含量、pH值、用量以及RG19的浓度。结果表明，PANI/TNT的内径为6 nm，且PANI未改变TNT的结构。PANI包覆在TNT的表面。PANI/TNT的光响应扩展到了可见光区域。在六种不同的光催化剂中，1.17 wt%的PANI/TNT在处理10 ppm的RG19时表现最佳。对于低pH下复合材料大量质子化的表面，最佳pH值为3。吸附量随用量增加而增加。脱色效率随初始RG19浓度的增加而降低。经过5次循环后，光催化剂分解RG19的性能稳定。
