Research On The Synthesis And Photocatalytic Properties Of Bismuth Oxide Nanostructures

With the continuous development of society and economy, the human damage to thenatural environment is more and more serious. Therefore, the environmental protection isbecoming one of the important issues which all humanity must face, and the governanceof water pollution cause for concern in particular. In recent years, using photocatalyst tocatalyze the degradation of organic pollutants in water is becoming one of the researchfocuses in the field of water pollution governance. As a new type of semiconductornanomaterial, bismuth oxide nanomaterial is receiving more and more attention because ofits excellent photocatalytic performance. In certain lighting conditions, bismuth oxidenanomaterial can create electron-hole pairs by optical excitation so as to have strongoxidation-reduction ability, thereby making the organic pollutant in water be degradedgradually to some environmental friendly innocuous substances such as CO2and H2Oafter a series of oxidation-reduction reactions. The application of this new nanomaterial tothe field of photocatalysis will present a new idea to solve the problem of water pollution.Firstly, this paper designs a simple way to synthesize bismuth oxide nanomaterial byhydrothermal method. By changing some experimental parameters such as the reactiontemperature, solution concentration and the reaction time, we synthesized a series ofbismuth oxide nanosheets samples. By testing the obtained samples through the method ofXRD and SEM, we analyzed the impact of the three experimental parameters on thecomposition and morphology of the samples.Secondly, this paper uses the obtained samples of bismuth oxide nanomaterialrespectively for the experiment of photocatalytic degradation of methyl orange solution.By comparing the degradation effect of the samples, we find that, if the quality of thebismuth oxide nanosheets is better, the degree of aggregation is lighter and the size ofnanosheets is smaller, the photocatalytic performance will be relatively better. So we believe that, achieving the nanomaterials with the better quality, the lighter degree ofaggregation and the smaller size by changing the experimental parameters will becomeone of the impotant ways to improve the catalytic performance of nanometer photocatalystin the future.