Study On Microwave Synthesis Of 1D/2D Composite Nanomaterials And Their Synergistic Catalytic Activity

In view of the current outstanding environmental problems,in this paper,the microwave method was adapted to systhesis the low-dimension meterials,making use of photocatalysis technology and other advanced oxidation process,to degradate the pollutions in water and the volatile organic contaminants air indoor.In microwave-synthesized low-dimensional composites,the main catalyst is a one-dimensional structure with high active sites exposed,and the co-catalyst is a two-dimensional material with a high dielectric constant.One-dimensional materials are grown in situ on a two-dimensional material substrate by liquid-phase microwaves to construct a one-dimensional/two-dimensional?1D/2D?interface.In addition,using the superheat effect of the two-dimensional substrate?graphene,Ti₃C₂?under microwave irradiation,the 1D/2D interface is thermally reduced and modified to enhance the interface bonding force of the composite material.In the catalytic process,it is beneficial to the efficient migration of electrons,and it can also promote the activation of molecular oxygen.The material synthesis method and the utilization of the properties of carbonaceous materials in this paper have certain significance for the design and application of low-dimensional composite materials.The main research contents and innovations of this paper are:1.Solid-state microwave construction of mixed valence WO_3-x-rGO for Photo-Fenton synergistic degradation of BPAUsing the microwave superheat effect of graphene,a one-dimensional WO₃nanowire/rGO composite structure was synthesized by microwave mellow method.Thermal reduction of WO₃/rGO by solid-phase microwave irradiation created a reduced W⁴⁺on the surface of WO₃.Combined with the effect of Fenton,the transition from W⁶⁺/W⁴⁺is used to achieve the conversion of Fe³⁺to Fe²⁺,which promotes the continuous production of reactive oxygen species in the Fenton reaction,and solves the problem of reagent consumption by the Fenton reaction.2.Study on Microwave Synthesis of MnO₂ Nanowires/MXene Composites and Their Photocatalytic Degradation of FormaldehydeMicrowave hydrothermal method was used to make MnO₂ nanowires grow on the surface of MXene?Ti₃C₂?by using the microwave superheat effect of MXene material.A thin layer of MXene was obtained by etching and stripping,and the relative content of the thin layer structure of MXene was adjusted,so that the MnO₂nanowires and MXene formed effective line-to-surface contact.Using it for photothermal catalytic degradation of formaldehyde,MXene photothermally activates molecular oxygen and assists MnO₂ to catalyze the degradation of formaldehyde.3.Microwave Synthesis of NH₂-MIL-53?Al?Nanoribbons/rGO Composites and Their Photocatalytic Degradation of Formaldehyde.In view of the slow removal of formaldehyde by inorganic semiconductor materials,consider the adsorption effect to quickly reduce the concentration of formaldehyde to achieve the integration of adsorption and photocatalysis.Utilizing the microwave superheat effect of GO to control the synthesis of NH₂-MIL-53?Al?nanoribbons/rGO composites,and applying it to the adsorption-photocatalytic degradation of formaldehyde,the adsorption and removal of formaldehyde in the absence of light was achieved.Catalytic degradation and conversion of formaldehyde.