The nanocomposite of polyaniline and nitrogen-doped layered HTiNbO5 with excellent visible-light photocatalytic performance.
The nanocomposite of polyaniline and nitrogen-doped layered HTiNbO5 with excellent visible-light photocatalytic performance.
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DOI：
10.1039/c4cp01423e
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发表时间：
2014-06
期刊：
影响因子：
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通讯作者：
Chao-Jun Liu;Liang Wu;J. Chen;Ji-yuan Liang;Changshun Li;Hong-mei Ji;W. Hou
中科院分区：
文献类型：
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作者：
Chao-Jun Liu;Liang Wu;J. Chen;Ji-yuan Liang;Changshun Li;Hong-mei Ji;W. Hou
采用一种有效的方法合成了具有良好插层性能的n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，原位聚合法制备聚苯胺(PANI) -N-HTiNbO5片层状纳米复合材料。由于氮掺杂会影响[TiNbO5]（-）层的表面电荷分布，因此得到的PANI-N-HTiNbO5纳米复合材料在N-HTiNbO5层间有单层聚苯胺，具有较好的结晶度。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n掺杂、酸交换和嵌入聚苯胺，增强了聚苯胺- n - htinbo5纳米复合材料的可见光响应。在可见光照射下，聚苯胺- n - htinbo5纳米复合材料的亚甲基蓝降解率最高，在170 min内降解率为97.8%。聚苯胺与N-HTiNbO5之间的协同作用导致了电荷分离效率的提高，从而显著提高了光催化性能。此外，PANI-N-HTiNbO5纳米复合材料由于在分子水平上的插层反应而具有较高的热稳定性和光降解稳定性。
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.