Structural Evolution And Photocatalytic Properties Of "114" Oxide Induced By Ion Doping

Because of the special structure of the "114" oxide, at present, its magnetic properties and oxygen storage properties are mainly studied. This paper selects t he non magnetic Ga3+/Zn2+, two new compounds of YBaZn3GaO7 and YSrZn3 Ga O7 were secleted to synthesized, and doping other ion in the octahedral. The str ucture evolution and the photocatalytic of the doping compound were studied. Th e innovation points and main research results of this paper are:1. Four new "114" compounds were successfully synthesized by high temper ature solid state method(YBaZn3GaO7?YSrZn3GaO7?ScBaZn3GaO7 ? ScSrZn3 Ga O7). New members are added to this class of compounds.2. The position of Y3+ in the YBaZn3GaO7 was successfully doped into sma ller ions Sc3+, and the whole solid fusion is realized. And the position of Y3+ i n YSrZn3GaO7 is doped into In3+. Although doped with trace impurities, it can b e seen from the XRD that the doping is successful. For Y1-xScxBa Zn3GaO7(x = 0 ~ 1) of structure refinement, we got full understanding of the structure inform ation of each doped compounds. From finishing data analysis of doping induced "114" compound structure evolution, the Sc3+ doping upward O1, cause octahedra l contraction, Ba-O bonding are more average. The position of Zn2+/Ga3+ was int egrated, the overall structure stress was reduced, the degree of distortion was gre atly reduced, and the structure of the compound was more stable.3. The photocatalytic decomposition of water was studied for the two dopin g systems. Y1-xScx BaZn3GaO7(x = 0 ~ 1) photocatalytic hydrogen production act ivity has greatly improved after loaded. Then it carried out a variety of precious metal load experiment, The success of photocatalytic hydrogen production activit y increased to ten times, and we analyzed the reasons. Comprehensive analysis o f its structure, UV Vis diffuse reflectance, band analysis and catalytic experiment results. The reason for the increase in the activity can be attributed to the redu ction of the structural defects, and the recombination probability of the electron and hole. That why it can increase the activity.