Jarvin Mariadhas, Rosaline Daniel Rani, Gopalakrishnan Thamizharasan, Kamalam Maniveldoss Beaula Ruby, Foletto Edson Luiz, Dotto Guilherme Luiz, Inbanathan Savariroyan Stephen Rajkumar
Post Graduate and Research Department of Physics, The American College, Madurai, 625002, Tamil Nadu, India.
Post Graduate and Research Department of Chemistry, Lady Doak College, Madurai, 625002, Tamil Nadu, India.
Environ Sci Pollut Res Int. 2023 May;30(22):62832-62846. doi: 10.1007/s11356-023-26486-4. Epub 2023 Mar 22.
In this work, TiO-based nanocomposites containing polyaniline (PANI), poly(1-naphthylamine) (PNA), and polyindole (PIN) were synthesized by effective and simple routes and posteriorly employed as photocatalysts and supercapacitors. Characterization techniques such as XRD, FTIR, FESEM, UV, and PL were employed to investigate the structural, morphological, and optical properties of materials. XRD analysis confirmed the successful formation of TiO and TiO/polymer nanocomposites. PANI, PNA, and PIN polymers were well distributed on the surface of TiO nanoparticles and were investigated/explored from the FESEM analysis. The visible light absorption and the recombination rate of photogenerated charge carriers were confirmed by the UV-Vis and PL analysis. The photocatalytic properties of the nanocomposites were investigated towards malachite green (MG) dye degradation under sunlight. The dye degradation efficiency followed the order TiO/PNA > TiO/PANI > TiO > TiO/PIN. The higher efficiency of TiO/PNA can be associated with its smaller bandgap energy compared to the other materials. Electrochemical properties of materials were also examined by cyclic voltammetry and galvanostatic charge-discharge measurements using a three-electrode experiment setup in an aqueous electrolyte. TiO/PNA nanocomposite showed higher supercapacitor behavior compared to the other materials due to higher electrical conductivity of PNA and redox potential of TiO (pseudocapacitance).
在本工作中，通过有效且简单的路线合成了包含聚苯胺（PANI）、聚（1-萘胺）（PNA）和聚吲哚（PIN）的TiO基纳米复合材料，并随后将其用作光催化剂和超级电容器。采用XRD、FTIR、FESEM、UV和PL等表征技术来研究材料的结构、形态和光学性质。XRD分析证实了TiO和TiO/聚合物纳米复合材料的成功形成。聚苯胺、聚（1-萘胺）和聚吲哚聚合物均匀分布在TiO纳米颗粒表面，并通过FESEM分析进行了研究。通过UV-Vis和PL分析证实了可见光吸收和光生载流子的复合率。研究了纳米复合材料在阳光下对孔雀石绿（MG）染料降解的光催化性能。染料降解效率遵循TiO/PNA＞TiO/PANI＞TiO＞TiO/PIN的顺序。TiO/PNA的较高效率可能与其相比其他材料较小的带隙能量有关。还使用三电极实验装置在水性电解质中通过循环伏安法和恒电流充放电测量来研究材料的电化学性质。由于PNA的较高电导率和TiO的氧化还原电位（赝电容），TiO/PNA纳米复合材料与其他材料相比表现出更高的超级电容器性能。
