CAJ | 학술논문

通过离子交换法将Ag纳米颗粒负载于玻璃微珠的表面及浅表层,并以钛酸四丁酯的乙醇溶液为前驱体,将TiO_2负载于包含银的玻璃微珠表面,制得一种玻璃微珠/Ag/TiO_2复合光催化剂.由于纳米银的表面等离子体吸收效应,该复合光催化剂具有一定的可见光响应特性.利用XRD、SEM对样品进行表征,可发现玻璃微珠表面形成一层均匀多孔的锐钛矿TiO_2,其粒径均在50 nm左右.由漫反射光谱可得出该催化剂具有较强的可见光吸收,并在降解甲基橙溶液的试验中表现出较好的可见光催化活性.
통과리자교환법장Ag납미과립부재우파리미주적표면급천표층,병이태산사정지적을순용액위전구체,장TiO_2부재우포함은적파리미주표면,제득일충파리미주/Ag/TiO_2복합광최화제.유우납미은적표면등리자체흡수효응,해복합광최화제구유일정적가견광향응특성.이용XRD、SEM대양품진행표정,가발현파리미주표면형성일층균균다공적예태광TiO_2,기립경균재50 nm좌우.유만반사광보가득출해최화제구유교강적가견광흡수,병재강해갑기등용액적시험중표현출교호적가견광최화활성.
The sliver nanoparticles were loaded on the surface of glass-microspheres (GMS) by ion-exchange method, and TiO_2 was loaded on the GMS with the solution of Ti(OBu)_4 and ethanol as precursor, then the GMS/Ag/TiO_2 composite photocatalyst was obtained. The as-prepared composite photocatalyst exhibits somewhat visible-response properties, owing to the plasmon resonance of Ag nanoparticles. The samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and UV/Vis diffuse-reflectance spectra. It was present that a uniform and porous film of anatase TiO_2 was formed on the surface of GMS and the diameter of TiO_2 particles was about 50 nm. In addition, the composite photocatalyst has efficient visible-light absorbance, and it shows efficient visible-light photocatalytic activity for the degradation of methyl orange (MO).