The sillenite compound Bi₁₂SiO₂₀ was synthesized via Pechini sol–gel method. Composition, crystallinity, microscopic appearance, and optical properties of samples were characterized by XRD, SEM, FTIR, and UV/Vis/NIR spectrophotometer. The photocatalytic property of pure Bi₁₂SiO₂₀ was also investigated by detecting the degradation rate of rhodamine B (RhB). The experimental conditions related to the preparation of pure phase bismuth silicate, such as the content of citric acid, calcination temperature schedule, and the molar ratio of Bi/Si were investigated. And when n_{(citric acid)} = 13 mmol, n_(Bi/Si) = 10, and heat preservation at 630 °C for 5 h, pure bismuth silicate powder can be successfully synthesized. And the degradation of RhB by Bi₁₂SiO₂₀ under visible light for 150 min can reach to 80%, which indicated that pure Bi₁₂SiO₂₀ is an excellent photocatalyst under the visible light. In addition, the capture experiments demonstrate that (V_o⁺) dominates in photocatalytic degradation.

通过Pechini溶胶-凝胶法合成了亚硅酸盐化合物Bi ₁₂ SiO ₂₀。用XRD，SEM，FTIR和UV / Vis / NIR分光光度计对样品的组成，结晶度，显微外观和光学性质进行了表征。通过检测罗丹明B（RhB）的降解速率，还研究了纯Bi ₁₂ SiO ₂₀的光催化性能。研究了柠檬酸铋含量，煅烧温度，Bi / Si摩尔比等与纯相硅酸铋制备有关的实验条件。当n _{（柠檬酸）}  = 13 mmol时，n _{（Bi / Si）} = 10，并在630°C下保温5小时，可以成功合成纯硅酸铋粉末。Bi ₁₂ SiO ₂₀在可见光下150 min对RhB的降解率达到80％，表明纯Bi ₁₂ SiO ₂₀在可见光下是优良的光催化剂。此外，捕获实验表明（V _o ⁺）在光催化降解中占主导地位。