Liu Chao, Wu Liang, Chen Jing, Liang Ji-yuan, Li Chang-shun, Ji Hong-mei, Hou Wen-hua
Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
Phys Chem Chem Phys. 2014 Jul 14;16(26):13409-17. doi: 10.1039/c4cp01423e.
An effective approach has been used to synthesize N-doped HTiNbO5 (denoted as N-HTiNbO5) with a better intercalation property. The synthesis of polyaniline (PANI) with N-HTiNbO5 to form PANI-N-HTiNbO5 lamellar nanocomposites by in situ polymerization using the aniline (ANI) intercalation compound ANI/N-HTiNbO5 as the intermediate has been investigated. The resulting PANI-N-HTiNbO5 nanocomposite showed a better crystallinity with a monolayer of PANI within the interlayers of N-HTiNbO5, because nitrogen doping can affect the surface charge distribution of TiNbO5 layers. The cyclic voltammetry (CV) results indicated that the PANI-N-HTiNbO5 nanocomposite had good redox activity and electrochemical-cycling stability in acidic solution. The visible-light response of the PANI-N-HTiNbO5 nanocomposite was enhanced through N-doping, acid exchange, and the intercalation of PANI. The PANI-N-HTiNbO5 nanocomposite showed the highest activity with 97.8% methylene blue (MB) photodegraded in 170 min under visible light irradiation. The significant enhancement of photocatalytic performance can be attributed to the high efficiency of charge separation, induced by the synergistic effect between PANI and N-HTiNbO5. In addition, the PANI-N-HTiNbO5 nanocomposite had a high thermal and photodegradation stability due to the intercalation reaction at the molecular level.
一种有效的方法已被用于合成具有更好插层性能的氮掺杂 HTiNbO5（记为 N-HTiNbO5）。研究了以苯胺（ANI）插层化合物 ANI/N-HTiNbO5 为中间体，通过原位聚合使聚苯胺（PANI）与 N-HTiNbO5 反应形成 PANI-N-HTiNbO5 层状纳米复合材料。所得的 PANI-N-HTiNbO5 纳米复合材料表现出更好的结晶度，在 N-HTiNbO5 的层间有单层的 PANI，这是因为氮掺杂会影响TiNbO5层的表面电荷分布。循环伏安法（CV）结果表明，PANI-N-HTiNbO5 纳米复合材料在酸性溶液中具有良好的氧化还原活性和电化学循环稳定性。通过氮掺杂、酸交换以及 PANI 的插层，PANI-N-HTiNbO5 纳米复合材料的可见光响应得到增强。PANI-N-HTiNbO5 纳米复合材料表现出最高的活性，在可见光照射下 170 分钟内 97.8%的亚甲基蓝（MB）被光降解。光催化性能的显著增强可归因于 PANI 和 N-HTiNbO5 之间的协同效应所诱导的高效电荷分离。此外，由于分子水平上的插层反应，PANI-N-HTiNbO5 纳米复合材料具有高热稳定性和光降解稳定性。
