Preparation And Properties Of Bi-based Photocataltic Materials

Along with the increasingly serious environmental problems,environmental governance become a focus now,people gradually found in environmental governance environment function material excellent results in the governance environment,clean and no secondary pollution,make it become the research focus of academic circles.Bi system because of its unique structure and a variety of photocatalyst morphology,has the very good catalytic,stable performance,the dye Rhodamine B and Methyl Orange,Methylene Blue and Antibiotic Ciprofloxacin,sand magnitude has good degradation ability,therefore in the governance of environment gradually become hot topics in the study of people;Bi2O2CO3 and Bi2O3 can better use of ultraviolet and visible light are depth profiling,its constituent materials are ineffective in environmental governance,and composite materials can fully use their advantages,improve the quantum efficiency,so a single component of Bi2O2CO3 and Bi2O3 need to be modified to improve the photocatalytic performance of them.(1)Bi2O2CO3 was prepared by hydrothermal synthesis method,and then it was used as a template to prepare the Bi2O2CO3/BiPO4 heterostructure composite photocatalytic materials.By XRD,XPS and HRTEM,DRS,PL characterization methods such as the characterization of samples,explores the catalytic mechanism of material degradation and Rhodamine B as objects,research materials photocatalytic activity,examines the sodium dihydrogen phosphate dosage of Bi2O2CO3/BiPO4 photocatalytic performance impact.Results show that Bi2O2CO3/BiPO4 heterojunction photocatalytic materials remain the flower ball Bi2O2CO3 template structure,photocatalytic activity is superior to pure Bi2O2CO3 and BiPO4,after 30 min,under uv irradiation on the degradation of rhodamine B rate of 98.3%,compared with pure Bi2O2CO3 the performance of the catalyst increased 2.89 times.The results show that Bi2O2CO3 and BiPO4 are combined to form a heterostructure,which effectively reduces the composite of photogenic electrons and holes,thus improving the catalytic performance of the samples.(2)The honeycomb Bi2O2CO3 was prepared by hydrothermal synthesis method,By using it as a template,The honeycomb ?-Bi2O3/Bi2O2CO3 composite photocatalytic materials were prepared by in-situ transformation at high temperature.The photocatalytic materials were characterized by means of XRD?DRS?PL?XPS.The calcining temperature on the photocatalytic performance of honeycomb ?-Bi2O3/Bi2O2CO3 effect,get the calcination temperature is 400 ? when the composite materials in turn on the light after 150 min for the degradation of Rhodamine B rate reached 88%higher than that of pure Bi2O2CO3 nearly twice as much,at the same time,studied the honeycomb ?-Bi2O3/Bi2O2CO3 heterojunction photocatalytic materials of Rhodamine B and Methyl Orange,Methylene Mlue and Ciprofloxacin,sand magnitude of different organic pollutants degradation effect,get the degradation rate were 92.6%,79.5%,55.7%and 92.6%respectively;The degradation efficiency of Rhodamine B was the best when the dosage of catalyst was 50mg(1g/L).(3)The honeycomb Bi2O2CO3 was prepared by hydrothermal synthesis method,By using it as a template,The honeycomb ?-Bi2O3/?-Bi2O3 composite photocatalytic materials were prepared by in-situ transformation at high temperature.The photocatalytic materials were characterized by means of XRD?DRS?PL?XPS.Light catalyst was studied in dye Rhodamine B and Methyl Orange,Methylene Blue and Antibiotic Ciprofloxacin,sand magnitude of different organic pollutants degradation effect,their degradation rate was 96.4%,81%,57.1%and 81%;And get when calcining temperature is 550 ? experiment preparation heterojunction material performance is optimal,120 min,under the condition of visible light irradiation for RhB degradation rate reached 95%,and the dosage of the catalyst to 40 mg(0.9 g/L)when the optimal efficiency of the degradation of RhB.