ABSTRACT

In this study, we design and synthesize double helix hollow nanotube polyaniline (DHPANI) using C₁₈-L glutamic acid as a template. Then, DHPANI is acted as the substrate, and Pt@DHPANI nanocomposites are well prepared by using potassium chloroplatinate as the Pt source and formaldehyde as the reducing agent through adsorption reduction. Characterization results indicate that Pt@DHPANI nanocomposites have excellent and stable double helix morphology, and the hollow diameter is about 20 nm, which greatly increases the specific surface area of the polyaniline. Moreover, Pt nanoparticles (NPs) with an average particle size of about 50 nm are distributed on the surface of nanocomposites. Furthermore, it is found that the interaction between Pt NPs and DHPANI greatly increases, which makes the electron delocalization enhanced, causing more difficult for Pt NPs to lose/release electrons. In the catalytic reduction process of 4-NP, the catalytic efficiency of Pt@DHPANI nanocomposites is twice as much as Pt@PANI nanocomposites, showing excellent and stable catalytic performance.

摘要

在这项研究中，我们使用C ₁₈设计和合成双螺旋中空纳米管聚苯胺（DHPANI）-L谷氨酸为模板。然后，以DHPANI为底物，通过氯铂酸钾为Pt源，甲醛为吸附剂，通过吸附还原法制备了Pt @ DH​​PANI纳米复合材料。表征结果表明，Pt @ DH​​PANI纳米复合材料具有优良而稳定的双螺旋形态，中空直径约为20 nm，大大增加了聚苯胺的比表面积。此外，具有约50nm的平均粒度的Pt纳米颗粒（NP）分布在纳米复合材料的表面上。此外，发现Pt NP与DHPANI之间的相互作用大大增加，这使得电子离域化增强，使得Pt NP更加难以失去/释放电子。在4-NP的催化还原过程中，