Preparation and Properties of Supported SrTiO₃/HZSM-5 Photocatalyst

Abstract

HZSM-5 supported SrTiO3 was prepared using sol-gel method. The materials were characterized by XRD, SEM, BET, BJH and FT-IR measurements. The activity of photocatalytic degradation of reactive brilliant red X-3B was studied on SrTiO3/HZSM-5. The results show that SrTiO3 material is mainly composed of perovskite SrTiO3, as well as a small amount of SrCO3 phase. SrTiO3 is coated on the external surface of HZSM-5 in the χSrTiO3/HZSM-5. The specific surface area of the supported materials is mainly provided by the zeolite, while pore size in the materials is mainly in the range between 2-20nm. Photocatalytic activity of SrTiO3 is obviously enhanced after being supported, and the 30%SrTiO3/HZSM-5 has the maximum activity. 93.8% of reactive brilliant red X-3B can be degraded on 30%SrTiO3/HZSM-5 after 90 minites irradiation, while only 23.9% of the dye can be degraded on pure SrTiO3.

Keywords

• strontium titanate
• photocatalysis
• HZSM-5
• sol-gel