Artificial pigments of metalloporphyrin derivatives are effective catalysts for the degradation of toxic organic dyes, phenols, and other pollutants. We reported here an interfacial layer-by-layer (LBL) assembly of multiporphyrin arrays on the surface of multi-walled carbon nanotubes (MWNTs) with the use of Na₂PdCl₄ as a connector and manganese (III) meso-tetra(4-pyridyl)porphine acetate (MnTPyP) as a linker, respectively. Thermogravimetric analysis revealed that the relative content of organic species in the MWNT@(Pd-MnTPyP)_n nanocomposites increased gradually with more layers of Pd-MnTPyP assembled. The Soret absorption band of MnTPyP displayed approximately 20-nm redshift in the nanocomposites due to the increase of porphyrin-porphyrin interaction within the Pd-MnTPyP ultrathin films. The specific surface area was about 513.1 and 47.7 m²/g for the original MWNTs and MWNT@(Pd-MnTPyP)₃ nanocomposites, respectively. Finally, the nanocomposites were used as heterogeneous catalysts for catalytic degradation of toxic 1-naphthol, 1,5-dihydroxynaphthalene, 5-amino-1-naphthol, and 1-naphthol-5-sulphonic acid in phosphate buffer, using H₂O₂ as the oxidant. It was revealed that, when the nanocomposites were used, the catalytic efficiency could increase by 2 to 3 orders of magnitude. Higher catalytic efficiency was observed for the naphthols bearing the electron-donating group of hydroxyl or amino than those bearing an electron-withdrawing group of sulfonic acid.

金属卟啉衍生物的人工色素是有效降解有毒有机染料，酚和其他污染物的催化剂。我们在这里报告了使用Na ₂ PdCl ₄作为连接器和锰（III）介孔四（4）在多壁碳纳米管（MWNT）表面上的多卟啉阵列的界面逐层（LBL）组装。-吡啶基）乙酸吗啡酯（MnTPyP）分别作为接头。热重分析表明，MWNT @（Pd-MnTPyP）_n中有机物的相对含量随着组装的Pd-MnTPyP层的增加，纳米复合材料逐渐增加。由于Pd-MnTPyP超薄膜中卟啉-卟啉相互作用的增加，MnTPyP的Soret吸收带在纳米复合材料中显示出约20 nm的红移。原始的MWNTs和MWNT @（Pd-MnTPyP）₃纳米复合材料的比表面积分别约为513.1和47.7 m ² / g 。最后，使用H ₂ O ₂将该纳米复合材料用作多相催化剂，用于在磷酸盐缓冲液中催化降解有毒的1-萘酚，1,5-二羟基萘，5-氨基-1-萘酚和1-萘-5-磺酸。作为氧化剂。揭示了，当使用纳米复合材料时，催化效率可以提高2-3个数量级。观察到带有羟基或氨基的给电子基的萘比带有磺酸的吸电子基的萘具有更高的催化效率。