Novel Ag3PO4/TiO2 composites for efficient decomposition of gaseous 2-propanol under visible-light irradiation

作者：Rawal Sher Bahadur; Sung Sang Do; Lee Wan In^*

来源：Catalysis Communications, 2012, 17: 131-135.

DOI：10.1016/j.catcom.2011.10.034

• Heterojunction
• Photocatalyst
• Visible light
• Ag3PO4
• Ag3PO4/TiO2
• 2-propanol

Ag3PO4 nanoparticle of similar to 100 nm size was synthesized by an ion-exchange reaction between AgNO3 and Na3PO4 at ambient condition. The dark yellowish Ag3PO4 with a bandgap of 2.44 eV revealed significant visible-light absorption. Novel heterojunction structures of Ag3PO4/TiO2 were then fabricated by covering the surface of Ag3PO4 with polycrystalline TiO2 by sol-gel process. Under visible-light irradiation (lambda %26gt;= 420 nm). 3/97 Ag3PO4/TiO2 (in wt.% ratio) showed remarkably high photocatalytic activity in removal of gaseous 2-propanol (IP) and in evolution of CO2. Its photocatalytic behavior seemed to be caused by the inter-semiconductor hole-transfer between the valence band (VB) of Ag3PO4 and TiO2.

• 出版日期2012-1-5