CAJ | 학술논문

以NaOH与Bi(NO3)3·5H2O为原料，在乙醇溶剂中分别采用恒温搅拌、超声和溶剂热法合成了不同形貌和尺寸的α-Bi2 O3微晶。利用X射线衍射( XRD)、扫描电镜( SEM)、紫外-可见漫反射光谱( DRS)对α-Bi2 O3微晶进行了表征。并以罗丹明B作为模型污染物，研究了不同方法制备的α-Bi2 O3微晶在模拟太阳光照射下的光催化性能。结果表明，不同制备方法对α-Bi2 O3微晶的形貌尺寸、光吸收性质及光催化性能均有影响。其中溶剂热法制备的α-Bi2 O3微晶带隙最窄，可以吸收更大光谱范围内的可见光，加上它的粒子尺寸较小，因此它在模拟太阳光下光催化降解罗丹明B的光催化活性也最高。
이NaOH여Bi(NO3)3·5H2O위원료，재을순용제중분별채용항온교반、초성화용제열법합성료불동형모화척촌적α-Bi2 O3미정。이용X사선연사( XRD)、소묘전경( SEM)、자외-가견만반사광보( DRS)대α-Bi2 O3미정진행료표정。병이라단명B작위모형오염물，연구료불동방법제비적α-Bi2 O3미정재모의태양광조사하적광최화성능。결과표명，불동제비방법대α-Bi2 O3미정적형모척촌、광흡수성질급광최화성능균유영향。기중용제열법제비적α-Bi2 O3미정대극최착，가이흡수경대광보범위내적가견광，가상타적입자척촌교소，인차타재모의태양광하광최화강해라단명B적광최화활성야최고。
Using NaOH and Bi(NO3)3·5H2O as the precursors,α-Bi2O3 microcrystallines were prepared in the ethanol solvent via sonochemical,thermostatic stirring and solvothermal methods respectively. X-ray diffraction( XRD) ,Scanning electron microscopy ( SEM ) and diffuse reflectance spectroscopy ( DRS ) were used to characterize the samples. The photocatalytic performance of α-Bi2O3 was evaluated using Rhodamine B(RhB)as a model pollutant under simulated sunlight illumination. The result showed that the preparation method could affect the morphology, size, absorption properties and catalytic performance ofα-Bi2 O3 microcrystalline.α-Bi2 O3 microcrystalline prepared via the solvothermal method has low band gap energy and high absorbance in wider visible light region,in addition to the small particle size, and therefore showed the highest photocatalytic activity for photocatalytic degradation of RhB.