| H6P2W18O62/SiO2：用模板剂制备及光催化降解二甲酚橙的性能 |
| H6P2W18O62/SiO2: Preparation by Templates and Performance for Photocatalytic Degradation of Xylenol Orange |
|
| 摘要: 分别采用非离子表面活性剂(C3H6OC2H4O)x(P123)，阴离子表面活性剂C12H25NaO4S(SDS)和C18H29NaO3S(SDBS)作为模板剂，通过溶胶-凝胶再结合程序升温溶剂热一步法制备了一系列固载杂多酸光催化材料-H6P2W18O62/SiO2。通过傅立叶-红外光谱(FTIR)、X-射线衍射(XRD)、电感耦合等离子体原子发射光谱(ICP-AES)、氮气吸附-脱附测定、透射电子显微镜(TEM)以及扫描电子显微镜配合X-射线能量色散谱仪(SEM-EDS)等测试手段对不同模板剂作用下合成产物进行了对比表征分析。结果表明，不同模板剂作用下的系列固载杂多酸-H6P2W18O62/SiO2产物中母体多酸的Dawson基本结构均未发生明显变化，但固载后比表面积显著不同，其中，经模板剂P123和SDS作用合成的H6P2W18O62/SiO2(P123)和H6P2W18O62/SiO2(SDS)的比表面积高达916和634 m2·g-1，且显示为有序介孔材料。以二甲酚橙为模型分子，在微波场作用下，该系列固载多酸光催化性能研究结果显示，它们的光催化活性可被微波显著增强，其中，采用P123作用合成产物的光催化活性最高，60 min内对二甲酚橙的降解率达99%以上。 |
| 关键词: 模板剂 杂多酸 微波 光催化 |
| 基金项目: |
| Abstract: A series of H6P2W18O62/SiO2 photocatalysts were prepared by a one-step sol-gel-hydrothermal technique in the presence of triblock-poly(ethylene oxide)-poly(propylene oxide)-(ethylene oxide)copolymer(P123), anion surfactant C12H25NaO4S(SDS) and C18H29NaO3S(SDBS). The phase structures, chemical composition, optical absorption properties and surface physicochemical properties were characterized via FTIR spectroscopy, X-ray diffraction(XRD), inductively coupled plasma atomic emission spectroscopy(ICP-AES), nitrogen adsorption/desorption, transmission electron microscopy(TEM) and scanning electron microscope with energy dispersive spectrometer(SEM-EDS). The results indicate that the basic structure of H6P2W18O62 in the H6P2W18O62/SiO2 has been basicly matained and the surface area is changed with the template used in the synthesis. The composites H6P2W18O62/SiO2(P123) and H6P2W18O62/SiO2(SDS) are mesoporous materials with surface area of 916 and 634 m2·g-1 respectively. The photocatalytic activities of the as-prepared materials were studied by the microwave enhanced photodegradation of xylenol orange. The results show that the photocatalytic activity of H6P2W18O62/SiO2(P123) is the best under the microwave irradiation, and the degradation rate of Xylenol orange is over 99% within 60 min. |
| Keywords: template heteropolyacid microwave photocatalysis |
| |
| 摘要点击次数: 1592 |
| 全文下载次数: 1911 |
| 李 莉,曹艳珍,陆 丹,陈世界.H6P2W18O62/SiO2：用模板剂制备及光催化降解二甲酚橙的性能[J].无机化学学报,2010,26(3):440-446. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
