Synthesis And Photocatalytic Properties Of Silver Vanadate Microplates

In the 21 st century, mankind is faced with energy shortages, environmental degradations, water pollutions and many other issues, forcing people to take effective measures and develop new energies to solve the issues of this series. Potential applications of semiconductor photocatalyst in the fields of energy and environment provide us with new train of thought to solve these problems.Currently, TiO2 is one of the commonly used mass producted photocatalysts, it has advantages such as low price, good chemical stability, high recycling rate, mature industrial production technology and so on. However, due to its band gap of about 3.2eV, it can only absorb ultraviolet(uv light accounts for only about 5% of sunlight), so how to take advantage of visible light in sunlights(about 43%) and indoor illumination has already attracted scientists’ wide attention. Since Professor Ye Jinhua discoverd silver phosphate has a high quantum yield and high visible light catalytic activity, study on silver-based photocatalysts bocomes more and more.So far, the general method for preparing silver-based photocatalyst is direct liquid-phase deposition method, the material prepared generally has no specific morphology. And by adding NH3 and other complexing agents can modulate the growth of specific crystal faces. In this paper, by hydrothermal method, we successfully prepared silver vanadate(Ag4V2O7) crystals with a specific morphology,and explores the catalytic activity of Ag4V2O7. This thesis, focusing on Ag4V2O7 crystal morphology, structure, chemical composition and the measurements of photocatalytic properties, has studied the following issues:Through hydrothermal reaction, we successfully synthesized hexagonal micron sheet single crystal Ag4V2O7. By decomposition of rhodamine B, methylene blue,methyl orange and other materials,we analyzed the catalytic properties of visible light catalyst we synthesized.