Building Monomolecular Layer Interface Of Heterogeneous Catalyst Nile Blue And Researching Its Catalytic Mechanism

LB technique can be used to order molecular structure, and it is a widly used technique to study the configuration of the catalyst. Nile blue (3-amino-7-(diethylamino)-1,2-benzophenoxazin sulfate) is a material that has chemical characteristics such as the reducibility, the assisted catalytic property and the strong flourscence properity. In this study, based on investigating the properties of Nile blue, we have synthesized a new type of Nile blue (Nb), which has derivative molecules terminated with long-chain alkyl (termed as Nb18). We construct the Langmuir hybrid membrane and deposited it on the inert electrode surface to form the membrane catalyst. The oxazole ring is located in the medial layer of single molecule film (Langmuir-Blodgett) and oxazole ring in the outer layer molecular membrane (Langmuir-Schaefer). We study the membrane in the catalytic behavior of dihydronicotinamide adenine dinucleotide(NADH) oxidation reduction reaction. We found that the LS technique based deposited film has a higher catalytic activity towards NADH than the LB technique based deposited film. This is because that the oxazole ring has higher degrees of freedom by using the LS technique. It indicates that the catalytic active center of Nb-18 molecular is formed due to the oxazole ring, rather than the alkyl chain. Further, The study proves that the interface design is of great significance for catalytic performance improvement.Moreover, the Nile blue has the reducibility and is stable towards noble metals. By utilizing these properties, we synthesize the dendritic Pt nanocrystalline(fPtNCs). The fPtNCs possesses more active centers compared to the granular Pt nanocrystals, and thus it shows better catalytic properties towards oxidation of methano. We also find when we combine the dendritic Pt with graphite oxide together, the electric catalytic performance will be improved. Further, surface chemistry and electrochemistry prove that the dendritic Pt has a synergistic effect when it composed with graphite oxide nanocrystals.The Nile is a phenazine based type of dye with strong fluorescent characteristics. In this research, by using the induction effect of anionic clay, we adsorb the cationic dye onto the cationic cetylamine (CA) membrane. This forms three-component hybrid film. The Nile is a kind of strong fluorescent dyes phenazine. The spectroscopy proves molecules of two different types of adsorption state are formed. Adsorbed state one is more possible to be achieved at a high concentration (1-10 ppm) of clay dispersions and a low surface pressure (-5 mN/m). In this state the oxazole ring are arranged in a head to head style, and stand in parallel to the clay sheets. On the contrary is more possible to be achieved at a low concentration＜ 1 ppm) of clay dispersion and a high surface pressure (-30 mN/m). In this state, the oxazole ring are arranged in a side-by-side style, and stand perpendicularly to the clay sheets.