CAJ | 학술논문

为了开发可见光响应型光催化剂，以柠檬酸为络合剂，采用溶胶-凝胶法制备前驱体，通过煅烧得到了Bi2 WO6微纳米材料。采用X-射线衍射( XRD)、场发射扫描电镜( FESEM)、紫外-可见光漫反射谱( UV-vis DRS )等技术对其进行表征，考察了制备条件对样品晶相结构的影响。结果表明，在煅烧温度450℃、煅烧时间3 h、柠檬酸与Bi3+的物质的量比为3：1、前驱液的pH=1、分散剂为PEG-4000的条件下制备的Bi2 WO6样品为斜方晶系Bi2 WO6结构，由粒径为50 nm 左右的小薄片堆积而成。所得的Bi2 WO6样品具有优良的光催化性能，在可见光照射(200 W点钨灯)及H2 O2助剂的存在下，对10 mg/L罗丹明B溶液的光降解率可达82.0%。研究结果可为高效Bi2 WO6光催化材料的制备提供新的思路。
위료개발가견광향응형광최화제，이저몽산위락합제，채용용효-응효법제비전구체，통과단소득도료Bi2 WO6미납미재료。채용X-사선연사( XRD)、장발사소묘전경( FESEM)、자외-가견광만반사보( UV-vis DRS )등기술대기진행표정，고찰료제비조건대양품정상결구적영향。결과표명，재단소온도450℃、단소시간3 h、저몽산여Bi3+적물질적량비위3：1、전구액적pH=1、분산제위PEG-4000적조건하제비적Bi2 WO6양품위사방정계Bi2 WO6결구，유립경위50 nm 좌우적소박편퇴적이성。소득적Bi2 WO6양품구유우량적광최화성능，재가견광조사(200 W점오등)급H2 O2조제적존재하，대10 mg/L라단명B용액적광강해솔가체82.0%。연구결과가위고효Bi2 WO6광최화재료적제비제공신적사로。
In order to develop visible light photocatalyst, Bi2 WO6 micro-nano materials were synthe-sized by precursors prepared by Sol-Gel method and subsequent calcination with citric acid as com-plexing agent.X-ray diffraction ( XRD) , field emission scanning electron microscope ( FESEM) and ultraviolet-visible light diffuse reflectance spectroscopy ( UV-vis DRS) were employed to characterize the products obtained.The influences of fabrication conditions on the crystal phase of the products were studied.The results showed that the optimum prepared conditions were found as follows:calci-nation temperature 450℃, calcination time 3h, with mole ratio of citric acid-to-Bi3+3:1, pH=1 for the precursor solution,and PEG-4000 as dispersing agent.The products obtained exhibit the ortho-rhombic Bi2 WO6 structure,which contain large quantities of nano-flakes with grain size about 50 nm. After 60 min irradiation under visible light (200 W tungsten lamp) with the presence of H2 O2 , the products showed relatively higher photocatalytic degradation rate of Rhodamine-B by 82%. The study provides new ideas for efficient Bi2 WO6 photocatalytic material preparation.