Nano TiO 2 powders with pure anatase structure were prepared by the method of precipitation solution gelation, using H 2TiO 3, hydrogen peroxide and ammonia as reactants. Active red X 3B dye solution was select...Nano TiO 2 powders with pure anatase structure were prepared by the method of precipitation solution gelation, using H 2TiO 3, hydrogen peroxide and ammonia as reactants. Active red X 3B dye solution was selected as a model pollutant for the photocatalysis degradation experiments. The effects of grain sizes, dosage and microstructure of nano TiO 2 on its photocatalysis properties were studied. The results show that photo activity of the nano TiO 2 is enhanced with the grain sizes reducing or dosages increasing of nano TiO 2. However, excess increase in nano TiO 2 concentration is not advantageous to the enhancement of the photo activity. Anatase TiO 2 demonstrated a higher photo activity than rutile TiO 2. The dye solution hardly degraded without nano TiO 2 powders being added into it or under sunlight irradiation.展开更多
A novel chiral polyoxometalate（POM）, {[Na（Arg）2]NaH}[AIMo6（OH）6O18].6H2O（1,Arg=L-arginine）has been synthesized by the reaction between Na3[A1Mo6（OH）6O18].8H2O and Arg in aqueous solution and was structu- ral...A novel chiral polyoxometalate（POM）, {[Na（Arg）2]NaH}[AIMo6（OH）6O18].6H2O（1,Arg=L-arginine）has been synthesized by the reaction between Na3[A1Mo6（OH）6O18].8H2O and Arg in aqueous solution and was structu- rally characterized by single-crystal X-ray diffraction, elemental analyses and UV-Vis spectrometry. Compound 1 was an example of Arg based Anderson-type complex. Photocatalytic analysis indicates that compound 1 presents cata- lytic activity for photodegradation of rhodamine-B（RhB） under UV irradiation.展开更多
文摘Nano TiO 2 powders with pure anatase structure were prepared by the method of precipitation solution gelation, using H 2TiO 3, hydrogen peroxide and ammonia as reactants. Active red X 3B dye solution was selected as a model pollutant for the photocatalysis degradation experiments. The effects of grain sizes, dosage and microstructure of nano TiO 2 on its photocatalysis properties were studied. The results show that photo activity of the nano TiO 2 is enhanced with the grain sizes reducing or dosages increasing of nano TiO 2. However, excess increase in nano TiO 2 concentration is not advantageous to the enhancement of the photo activity. Anatase TiO 2 demonstrated a higher photo activity than rutile TiO 2. The dye solution hardly degraded without nano TiO 2 powders being added into it or under sunlight irradiation.
基金Supported by the National Natural Science Foundation of China(Nos.20701005,20701006)the Science and Technology Development Project Foundation of Jilin Province,China(No.20060420)+2 种基金the Postdoctoral Station Foundation of Ministry of Education of China(No.20060200002)the Testing Foundation of Northeast Normal University of Chinathe Natural Science Foundation of Changchun Normal University of China(No.2010006)
文摘A novel chiral polyoxometalate（POM）, {[Na（Arg）2]NaH}[AIMo6（OH）6O18].6H2O（1,Arg=L-arginine）has been synthesized by the reaction between Na3[A1Mo6（OH）6O18].8H2O and Arg in aqueous solution and was structu- rally characterized by single-crystal X-ray diffraction, elemental analyses and UV-Vis spectrometry. Compound 1 was an example of Arg based Anderson-type complex. Photocatalytic analysis indicates that compound 1 presents cata- lytic activity for photodegradation of rhodamine-B（RhB） under UV irradiation.
