CAJ | 학술논문

通过水热法以固体 AgNO3为 Ag 离子来源,成功制备出系列 Ag 离子改性修饰 Bi2 WO6复合光催化剂,并采用 X 射线衍射(XRD)、场发射扫描电子显微镜(FESEM)、X 射线光电子能谱仪(XPS)、能谱仪(EDS)和紫外-可见漫反射光谱(DRS)技术对其进行分析表征。研究表明,Ag 离子可能取代 Bi2 WO6中的Bi3+离子进入晶格,从而调节了禁带宽度。另一方面,纯Bi2 WO6与Ag离子改性修饰Bi2 WO6样品均为由纳米片自组装而成的球形结构,直径约为2~6μm。与纯Bi2 WO6相比,Ag离子改性修饰Bi2 WO6样品的结晶度较高且纳米片的排列也更致密,其光催化活性明显提高。在本文中形貌和能隙的优化是光催化性能提升的主要原因。当AgNO3的投加量为10%(摩尔分数)时,罗丹明B的降解率提高了近42%。
통과수열법이고체 AgNO3위 Ag 리자래원,성공제비출계렬 Ag 리자개성수식 Bi2 WO6복합광최화제,병채용 X 사선연사(XRD)、장발사소묘전자현미경(FESEM)、X 사선광전자능보의(XPS)、능보의(EDS)화자외-가견만반사광보(DRS)기술대기진행분석표정。연구표명,Ag 리자가능취대 Bi2 WO6중적Bi3+리자진입정격,종이조절료금대관도。령일방면,순Bi2 WO6여Ag리자개성수식Bi2 WO6양품균위유납미편자조장이성적구형결구,직경약위2~6μm。여순Bi2 WO6상비,Ag리자개성수식Bi2 WO6양품적결정도교고차납미편적배렬야경치밀,기광최화활성명현제고。재본문중형모화능극적우화시광최화성능제승적주요원인。당AgNO3적투가량위10%(마이분수)시,라단명B적강해솔제고료근42%。
A series of Ag ions modified Bi2 WO6 photocatalyst were synthesized successfully by hydrothermal method with solid silver nitrate and characterized by X-ray diffraction (XRD),field emission scanning electron microscope (FESEM),X-ray photoelectron spectrometer (XPS),energy dispersive X-ray detector (EDS)and UV-Vis diffusion reflectance spectra techniques (DRS).The result indicated that Ag ions may replace Bi3+ ions of bismuth tungstate into the crystal lattice,which regulates the forbidden band width.On the other hand, pure Bi2 WO6 and Ag ions modified Bi2 WO6 were both ball-like samples self-assembled with nanoplates.Com-pared with pure Bi2 WO6 ,Ag ions modified Bi2 WO6 samples have higher crystallinity and relatively closer ar-rangement in nanoplates,also more prominent photocatalytic activity.The optimization of morphology and en-ergy gap was the main reason to enhance the photocatalytic performance in this experiment.And the degrada-tion rate of RhB was increased by almost 42% while the quantity of AgNO3 adding content was 10 mol%.