CAJ | 학술논문

以钛酸四正丁酯为起始原料,采用溶胶-微波法合成出TiO_2纳米粒子,借助XRD、UV-Vis吸收光谱等测试手段对其进行了表征,并以罗丹明B为模型污染物考察了酸水比、微波反应温度和微波反应时间等因素对样品光催化性能的影响.结果表明,溶胶-微波法制备TiO_2的最佳工艺条件为:酸水比7:1,微波反应温度150℃,反应时间8min.以最佳工艺条件下制备的TiO_2为原料,采用光还原法成功制备出载Ag纳米TiO_2(摩尔比为1:1),将该光催化剂置于自然光下用于采油厂工业废水的处理,太阳光下照射10h,COD去除率达到92.35%.
이태산사정정지위기시원료,채용용효-미파법합성출TiO_2납미입자,차조XRD、UV-Vis흡수광보등측시수단대기진행료표정,병이라단명B위모형오염물고찰료산수비、미파반응온도화미파반응시간등인소대양품광최화성능적영향.결과표명,용효-미파법제비TiO_2적최가공예조건위:산수비7:1,미파반응온도150℃,반응시간8min.이최가공예조건하제비적TiO_2위원료,채용광환원법성공제비출재Ag납미TiO_2(마이비위1:1),장해광최화제치우자연광하용우채유엄공업폐수적처리,태양광하조사10h,COD거제솔체도92.35%.
The silicotungstic acid sensitized nano-TiO_2 (TiO_2-SiW) photocatalysts were synthesized using silicotungstic acid as sensitizer via a hydrothermal method. As-synthesized samples were characterized by XRD and UV-vis techniques and Rhodamine B was chosen as the model pollutant to evaluate photocatalytic activity of As-synthesized samples. UV-Vis absorption spectrum indicated that TiO_2-SiW photocatalysts were extended significantly into visible region comparing to pure TiO_2. Photocatalytic experiment results indicated that TiO_2-SiW photocatalysts exhibited much greater photocatalytic activity than pure TiO_2. Photocatalytic degradation of model pollutant was treated under UV light and sunlight. Results revealed that silicotungstic acid had a great influence on the photocatalytic activity of TiO_2.