CAJ | 학술논문

以Bi(NO)3?5H2O、Na2WO4?2H2O为原料，采用水热合成法成功制备出纳米片组成的球形Bi2WO6，并采用X射线衍射(XRD)、扫描电子显微镜(SEM)和紫外-可见漫反射(UV-Vis)技术对其进行分析表征，研究水热温度和反应时间对催化剂合成的影响。通过在紫外及可见光(λ＞420 nm)照射下，降解罗丹明B(RhB、5 mg/L)溶液来评估其光催化活性，并且考察了催化剂投加量、RhB的初始浓度、光源对罗丹明B降解率的影响。结果表明，在180℃水热7 h为最佳制备工艺；催化剂的投加量为2 g/L时，以紫外光为光源，照射120 min对RhB的降解率可达到99.8%。
이Bi(NO)3?5H2O、Na2WO4?2H2O위원료，채용수열합성법성공제비출납미편조성적구형Bi2WO6，병채용X사선연사(XRD)、소묘전자현미경(SEM)화자외-가견만반사(UV-Vis)기술대기진행분석표정，연구수열온도화반응시간대최화제합성적영향。통과재자외급가견광(λ＞420 nm)조사하，강해라단명B(RhB、5 mg/L)용액래평고기광최화활성，병차고찰료최화제투가량、RhB적초시농도、광원대라단명B강해솔적영향。결과표명，재180℃수열7 h위최가제비공예；최화제적투가량위2 g/L시，이자외광위광원，조사120 min대RhB적강해솔가체도99.8%。
Spherical Bi2WO6 photocatalysts were synthesized by hydrothermal method with different hydrothermal temperature and reaction time using Bi(NO)3?5H2O and Na2WO4?2H2O as raw materials, which were further characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis diffusion reflectance spectra techniques. The photocatalytic activity of Bi2WO6 photocatalysts was evaluated by degrading Rhodamine B (RhB, 5 mg/L) under ultraviolet and visible light irradiation (λ>420 nm). The influence of dosage of catalyst, initial concentration of RhB and light source on degradation rate was also investigated. The results indicate that 180 ℃ and 7 h are the proper conditions for preparing Bi2WO6 powders. When the dosage of Bi2WO6 catalyst is 2 g/L and the ultraviolet irradiate time is 120 min, the degradation rate of RhB is up to 99.8%.