Photocatalytic Wastewater Treatment Using the Zeolite-Y Entrapped Ruthenium Tris-2,2'-bipyridine Complex

• Autorzy: Szulbiński W.
• Języki publikacji: EN

Abstrakty

EN

The zeolite-Y entrapped ruthenium tris-2,2_-bipyridine complex, in 1% wt. metallized with platinum (Z-[Ru(bpy)3]2+/Pt), has been examined as a new photocatalyst for wastewater treatment in flow reactors of the pilot plant at the Plataforma Solar de Almeria, in Spain. The catalyst generated by the template synthesis of [Ru(bpy)3]2+ within the zeolite-Y supercages (with the occupancy of one the [Ru(bpy)3]2+ molecule per five the zeolite supercages), and then platinized of the resulting Ru intrazeolitic complex. The catalytic activity of Z-[Ru(bpy)3]2+/Pt for wastewater treatment has been compared to that of TiO2, as the standard. For this, phenol (PhOH) and pirimicarb (a pesticide) have been used as models for water pollutants. By kinetic measurements it has been documented that Z-[Ru(bpy)3]2+/Pt decomposes PhOH with the relative photonic efficiency of r = 0.37, assuming that r = 1.0 for TiO2, under the same experimental conditions. To improve the Z-[Ru(bpy)3]2+/Pt photocatalytic activity, all the zeolite supercages have to be occupied by [Ru(bpy)3]2+ molecules, since this might increase the rate of the photoinduced electron transfer reaction. Moreover, it has been revealed that Z-[Ru(bpy)3]2+/ Pt is mostly active at the visible range of the solar radiation, at which TiO2 is inactive and unable to decompose organic pollutants. This has been supported by the diffuse reflectance spectroscopic measurement exhibiting the electronic absorption of Z-[Ru(bpy)3]2+/Pt at max = 454 nm.

Słowa kluczowe

EN

photocatalysis; zeolite entrapped complex; photonic efficiency; titanium dioxide

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2001
• Tom: Vol. 75, nr 10
• Strony: 1543--1551

Twórcy

autor

Szulbiński W.

• Department of Environmental Monitoring, Central Mining Institute,40-166 Katowice, pl. Gwarków 1, Poland