Preparation method of novel Au/Fe2O3-TiO2 nanotube catalyst

Abstract

The invention relates to a preparation method of a titanium-iron composite supporter nanotube supported gold catalyst with high gold dispersity and controllable particle size. The TiO2 nanotubes synthesized by a hydrothermal process are used as a supporter and impregnated in a ferric hydroxide colloid, a sol perfusion process is utilized to prepare the titanium-iron composite supporter nanotubes, and lysine is used as a protective agent for noble metal nanoparticles and a linking agent between the noble metal particles and supporter, so that the small-size noble metal nanoparticles are uniformly supported onto the supporter in the formation process, thereby avoiding the step of previous functional treatment on the supporter, further synthesizing the supported noble metal catalyst material by one step, and greatly simplifying the synthesis steps. The composite supporter supported high-gold-dispersity catalyst can overcome the defects of low catalytic activity, small specific area, low dispersity of the active component gold, high accumulation tendency, high tendency to activity loss and the like, and has important practical application value. By reasonably selecting the composite supporter, regulating the structure and reasonably supporting the gold particles, the supported gold catalyst with smaller size and higher gold dispersity has higher catalytic activity.

Description

technical field [0001] The present invention relates to a novel Fe 2 o 3 -TiO 2 Composite nanotube supported gold catalyst, the invention also relates to the specific method and characteristics of preparing the catalyst. Background technique [0002] In recent years, air pollution has become increasingly serious and directly threatens the survival and development of human beings. As a new type of environmentally friendly catalyst material, supported gold catalysts have shown broad application prospects in the fields of air purification and environmental protection. A large number of studies have shown that the catalytic activity of gold is obtained or improved because it is highly dispersed on the carrier. The size of gold particles is one of the key factors affecting the activity of the catalyst. In addition, the nature of the carrier and the preparation method of the catalyst have a great impact on Catalyst activity also plays an important role. Therefore, choosing a ...

AI Technical Summary

Problems solved by technology

Based on the above analysis, designing a new type of titanium-iron composite metal oxide carrier with nanotube structure and morphology, which has the structural advantages of high specific surface area of ​​nanotubes and the high catalytic activity of composite metal oxides, will be able to overcome the current Catalysts have defects such as low activity of a single support and small specific surface area of ​​the support