不同填充溶剂对CaTi2O4(OH)2形貌及其光催化性能的影响

利用水热法通过改变填充溶剂的种类制备了不同形貌的CaTi2 O4(OH)2粉体.采用X射线衍射仪和扫描电子显微镜对粉体的相结构和微观形貌进行了分析,并结合粉体在紫外-可见吸收光下对罗丹明B的吸附率及光降解率进行了表征.研究了不同填充溶剂对CaTi2 O4 (OH)2的相结构、微观形貌、能带宽度以及光催化性能的影响.结果表明:乙醇和乙二醇作为填充溶剂时会抑制晶体的生长和发育,可获得纳米线状或团状CaTi2 O4 (OH)2粉体,对罗丹明B表现出较佳的吸附特性;无填充溶剂以及以水和环己烷分别作为填充溶剂可获得具有片状结构的CaTi2O4(OH)2粉体.填充环己烷能够促进CaTi2O4(OH)2相的生长和发育,结晶度最高达到了78.04;,在紫外可见光3h下对罗丹明B降解率达到91.6;.

Effect of Different Filling Solvents on Morphology and Photocatalytic Performance of CaTi2O4 (OH) 2

CaTi2O4 (OH)2 powders with different morphologies were prepared by hydrothermal method via changing the kinds of filling solvents.The phase structure and microstructure of the powders were characterized by X-ray diffraction and scanning electron microscopy.The adsorption and photo-degradation of Rhodamine B were characterized by UV-Vis absorption spectra.The influence of filling different solvents on the CaTi2O4 (OH)2 powders phase structure,morphology,optical energy gap and photocatalytic performance were investigated.The results show that ethanol and ethylene glycol could inhibit the growth and development of crystal,and could obtain nanowires or dendritic CaTi2O4 (OH)2 powders,which exhibited better adsorption properties for Rhodamine B.The CaTi2O4 (OH)2 powder with lamellar structure can be obtained when using solvent-free and filled with water or cyclohexane were used as filling solvent.Filling cyclohexane can promote the growth and development of CaTi2O4 (OH) 2 phase,which has the highest crystallinity of 78.04％,and the photocatalytic performance rate of Rhodamine B reached 91.6％ at 3 h of UV-visible light.