CHI Zhixian 1, ZHANG Shiying 2, FANG Zhiwei3
(1.Quanzhou Arts and Crafts Vocational College, Quanzhou 362500, Fujian, China; 2. Hunan Key Laboractory of Applied Environmental Photocatalysis , Changsha University, Changsha 410003, Hunan, Chin
Abstract:With In(NO3)3 and NH4VO3 as the precursors, the InVO4 /TiO2 nanocomposites were synthesized by hydrothermal method. The structure and microcosmic morphology of the products were investigated by XRD, TEM and DRS, and the visible-light activity of the InVO4/TiO2 nanocomposites was also studied. The results demonstrate that the surface of the irregular-shaped orthorhombic InVO4 is loaded with tiny TiO2 particles, which are mostly anatase phase with the diameter of about 10 nm after calcination at 520 ℃. And InVO4 facilitates the anatase-to-rutile phase transformation of TiO2. So the diffraction peak of rutile phase TiO2 appears at this temperature. Under visible light, the degradation rate of formaldehyde for 2.5 h by InVO4 /TiO2 nanocomposites with the mass concentration of 0.06 g/L reaches up to 66.2%.
Key words:hydrothermal method; nanocomposites; formaldehyde; visible-light activitya)