The Preparation And Catalytic Performance Study Of Novel Ultra-thin 2D Amorphous FeOOH Nanosheets

A novel ultra-thin two-dimensional oxyhydroxide nanosheet was prepared by controlling the conditions of the reducing agent and metal salt solution dropping reaction.The nanosheet thickness was only 1.5 nm at the smallest layer,and had a large specific surface area.Kong Rong.We have used its structural advantages to perform adsorption and degradation tests on azo dye Congo red,and found that it has very excellent properties.It not only has strong adsorption capacity for Congo red but also can be used as a catalyst for the photo-Fenton reaction to thoroughly perform Congo red.degradation.The large specific surface area and pore volume can increase the adsorption efficiency of the catalyst to the dye and H₂O₂,accelerate the degradation reaction on the catalyst surface,and improve the utilization of H₂O₂,while the structural characteristics of the two-dimensional nanoplatelet make it possible to expose more active sites.Accelerate the redox cycle of Fe³⁺and Fe²⁺,and finally improve the photocatalytic Fenton reaction performance.In the second part of this paper,we successfully embedded ultra-fine copper nano-particles in two-dimensional iron nano-sheets,using the structural characteristics of nano-sheets to play a role in limiting the protection of copper nanoparticles,and the use of copper and iron.The synergistic effect promotes the direct hydrogenation of LA to 1,4-PDO.The yield of 1,4-PDO can reach up to about 85%in our catalytic system.In the reaction process,the iron-based nanosheets play a role of limited protection,prevent the copper nanoparticles from agglomerating,and convert the copper nanoparticles into spherical nanoparticles with uniform appearance and small particle size.In addition,our iron oxyhydroxide nanosheets form in-situ metal oxide species with negative states during the reaction,which promotes the synergy between iron and copper and accelerates the lactone ring opening of GVL molecules,which is advantageous to add Hydrogen reduction converts it into 1,4-PDO.