Hydrothermal Synthesis And Photocatalytic Activity Of Doped CeO₂ Nano-Materials

CeO2 is the most important, typical cerium oxide. Nano-CeO2 as a kind of excellent performance of new functional materials, has been used in catalytic, solid oxide fuel cell, Sunscreen cosmetics, water dispensers, and automotive glass products. It has Very broad application prospects. Commonly used method of doped CeO2 for further improvement in structure and performance. There are many synthetic methods, which are widely concerned about the hydrothermal. We using hydrothermal synthesis Ce0.9Gd0.1O1.95 and Ce0.9Zn0.1O1.9 Nanoparticles. The photocatalytic activity was investigated by the degradation of Methylene blue.discussed the Results by changing the Hydrothermal conditions. Investigating structure, morphology and photocatalytic properties by doping Gd and Zn, changing filling degree and adding the surfactant.1. The Ce0.9Gd0.1O1.95 nanoparticles was prepared by hydrothermal method, and changed the filling degree of hydrothermal.The samples were characterized by means of XRD, FE-SEM and IR. Growth mechanisms of the nanoparticles were discussed. The photocatalytic activity was investigated by the degradation of Methylene blue. The results showed that the Ce0.9Gd0.1O1.95 particles which prepared at 110℃using formic acid as the solvent were of fluorite structure by calcined at 800℃. It is the average grain size of 21.6nm, flower-like morphology. The photocatalytic activity of Ce0.9Gd0.1O1.95 is better than CeO2 by Gd3+ doping in UV light. The morphology, grain size and properties are changed by changing the fillinggdegree. The product can form flower-like morphology when the Filling quantity for 26ml,30ml and 32ml. When the filling quantity for 28ml,It was nanorob and the the grain size of 20.2nm. the photocatalytic activity of Ce0.9Gd0.1O1.95 was the best at this point.2. The Ce0.9Zn0.1O1.9 nanoparticles was prepared by hydrothermal method. Using Surfactant-assisted Hydrothermal Synthesis a series of special morphology of the nano-materials, The samples were characterized by means of XRD and FE-SEM. discussing the nanometer particle morphology and properties by Zn doping and surfactant dosage. The results show that the Zn doping make grain size of products 58.7 nm. The morphology is irregular. The Zn0.1Ce0.9O1.9 was cubic fluorite structure, and it enhance CeO2 photocatalytic performance. The Ce0.9Zn0.1O1.9nanopowders prepared In the CTAB assisted hydrothermal was cubic fluorite structure, The average grain size was 35.6 nm,29.7nm and 40.6 nm respectively with the increase of concentration of CTAB. The morphology into a sheet by the needle, and finally into a spherical approximation. The photocatalytic degradation rate of Ce0.9Zn0.1O1.9 was maximum when the concentration of CTAB was 0.02 mol·L-1. The Ce0.9Zn0.1O1.9 nanopowders prepared In the assisted hydrothermal was cubic fluorite structure. The average grain size was 36.3nm,30.4nmå'Œ42.1nm nm respectively with the increase of concentration of citric acid nm. The morphology into a rope-like by the strip-like, and finally into Granular. The photocatalytic degradation rate of Ce0.9Zn0.1O1.9 was maximum when the concentration of citric acid was 0.02 mol·L-1.