Preparation Of Non-noble Metal Bimetallic Oxide Photocatalytic Materials Based On Polyacrylic Acid As Template And Study On Photocatalytic Properties And Mechanism

In recent decades,people have been troubled by energy shortage and environmental pollution,but photocatalytic technology has found a breakthrough to solve these problems.Photocatalytic hydrogen production could provided a new idea to solve the problem of environmental pollution caused by the shortage of fossil fuels and the extraction and combustion process.Photocatalytic degradation technology could effectively degraded organic pollutants such as antibiotics and dyes,which was one of the promising methods to solve water pollution.Therefore,in recent years,there had been an upsurge of research in the field of photocatalysis,and researchers have carried out a deeper exploration of photocatalytic technology and photocatalytic materials.However,in order to achieve excellent photocatalytic performance,some photocatalytic materials used precious metals in the development process,which made the research cost was too high to bear,or the research steps were complicated.All these problems hindered the application of photocatalytic materials in practice.Therefore,this paper studied the preparation and photocatalytic properties of non-noble metal bimetallic oxide photocatalytic materials based on polyacrylic acid as template and explores the photocatalytic mechanism.In this paper,two kinds of inexpensive non-expensive bimetallic photocatalyst materials were synthesized by non-noble metal drugs and one-pot method.The morphology and structure of the photocatalyst were investigated by XRD,XPS,SEM,TEM,UV and BET,and the photocatalytic performance of the photocatalyst was tested.The mechanism of photocatalysis was explored by trapping experiment.In chapter 3 of this paper,Cd Mo O₄/Cd O microspheres were synthesized using polyacrylic acid as template.Under visible light irradiation,Cd Mo O₄/Cd O microspheres had excellent photocatalytic hydrogen production performance,and the hydrogen production efficiency was up to 7029μmol·g^-1·h^-1.Meanwhile,Cd Mo O₄/Cd O composite photocatalyst also had good degradation performance,and could degrade HTC,OTC,NFX,RR2 and LEV antibiotics with degradation rates of96.33%,95.38%,88.48%,95.93%and 77.30%,respectively.In order to explore the stability of Cd Mo O₄/Cd O composite photocatalyst,the cycle test was carried out,which proved that the photocatalyst had good stability.Finally,the photocatalytic mechanism was proposed.Because the composite photocatalytic material could effectively separated the photogenerated electron-hole,and inhibited the electron-hole recombination,it showed excellent photocatalytic performance.In chapter 4 of this paper,a hollow like photofenton Cu Fe₂O₄/C nanosphere（CFO/C-PNSs）photocatalyst was prepared by calcination under the protection of nitrogen.CFO/C-PNSs unique structure enabled it to have more active sites and participated in the reaction more efficiently,so the degradation performance of photocatalyst was also better.The degradation rates of OTC,NFX,TCH,Rh B,MO and Cr⁶⁺were 92.36%,97.13%,98.75%,99.1%,90.60%and 90.42%respectively.Moreover,CFO/C-PNSs had high magnetic properties and was easy to recycle.In this paper,an efficient non-expensive bimetallic photocatalyst with low cost,environmental friendliness,easy recovery and good stability was synthesized by a simple method,which provided a new idea for photocatalysis technology and had a good application prospect in the field of photocatalysis.