Abstract: 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.

Key words: 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.