SrBi 4 Ti 4 O 15 was prepared by a Pechini sol-gel method, using strontium nitrate, bismuth nitrate penthydrate and tetrabutyl titanate as raw materials, citric acid as ligand, and ethylene glycol as solvent. The influences of the amount of citric acid, pH, ethylene glycol and calcining temperature on the phases of the product were researched. The morphology and photocatalytic properties of the as-synthesized powders were measured. The multiple comparison tests showed single phase of SrBi 4 Ti 4 O 15 was obtained under the conditions of pH = 7, metals:citric acid = 1:3, citric acid:glycol = 1:2, calcining the dry gel at 650˚C for 3 h. The as-synthesized SrBi 4 Ti 4 O 15 had a loose structure with a bandwidth of 3.01 eV. The degradation ratio of methyl orange reached up to 96.6% under the metal halide lamp irradiation for 3.5 h. Keywords

γ-Bi 2 MoO 6 was prepared by a mixed solvothermal method, using Bi(NO 3 ) 3 ·5H 2 O and (NH 4 ) 6 Mo 7 O 24 ·4H 2 O as raw materials. X-ray powder diffraction (XRD), infrared spectra (IR), and scanning electron microscopy (SEM) were used to characterize the as-prepared γ-Bi 2 MoO 6 . The as-prepared products showed a single phase and a microsphere structure. The photodegradation test showed that γ-Bi 2 MoO 6 had performance degradation of methyl orange. The cyclic voltammetry demonstrated that γ-Bi 2 MoO 6 accelerated the rate of electron transfer of K 4 Fe(CN) 6 /K 3 Fe(CN) 6 .