The 21st Century technology for energy requirements presented new challenges, which is not only to achieve the sustainable use of energy but also to face the destruction of the environment by traditional energy consumption. Modern technology often leads to the huge energy consumption, followed by increasingly serious environmental problems as well. Modern industry also makes the global environment getting worse and worse, which seriously harms human health. With Fujishima and Honda discovered the photocatalytic decomposition of water to get hydrogen, photocatalytic technology has also gradually been applied to environmental governance because of it use solar energy and it’s clean. As a conventional photocatalyst, TiO2 can only use the ultraviolet part of sunlight due to its wide band gap. So, looking for the visible light response photocatalytic materials is particularly important. Based on this, we use molten salt method to prepare visible light response materials (Bi12TiO20, Bi4Ti3O12) and one-dimensional structure of calcium copper titanate material (CaCu3Ti4O12). The specific contents are as following: (1) X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize structure and morphology of the synthesized samples; UV-visible diffuse reflectance spectra was used to characterize the spectral absorption properties of the samples; Nitrogen adsorption (BET) was used to characterize the surface area of the samples; X-ray photoelectron spectroscopy (XPS) was used to characterize the electronic states of surface elements of CaCu3Ti4O12. The experiment of photocatalytic degradation of organic dye rhodamine B (RhB) was used to characterize photocatalytic performance of the samples; Atomic force microscopy (AFM) was used to measure the surface potential of Bi4Ti3O12, and the electrochemical impedance spectroscopy (EIS) was used to characterize the transport capability of carrier. (2) By controlling the mole ratio of Bi/Ti, we synthesized Bi12TiO20 perovskite titanates with different morphologies, and we studied their efficiencies of photocatalytic degradation organic dyes under visible light. (3) We have studied how the temperature and time affect morphology of the Bi4Ti3O12 materials, after optimizing the temperature and time of the molten salt method, we prepared size-controllable Bi4Ti3O12 materials via controlling the amount of molten salts, and studied how their morphologies affect their photocatalytic properties. And we have confirmed that the ferroelectric properties of Bi4Ti3O12 have a very important significance to their photocatalytic properties by the experiment data of kelvin probe force microscopy (KPFM). (4) Using different molten salt systems and controlling the amount of molten salts, we have prepared calcium copper titanate materials with different morphologies, including cubes, polyhedron, one-dimensional nanowires and one-dimensional nanoribbons. And we have studied the detection performances for gaseous H2O2 using the one-dimensional nanowires and nanoribbons structure of calcium copper titanate materials. Found that calcium copper titanate nanowire and nanoribbon structure materials have significant performance differences for the detection of gaseous H2O2 and we speculated that the different electronic states of surface elements of CaCu3Ti4O12 may be responsible for their different performances.