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Nanostructured zinc titanate (NZT) was synthesized in high yield via a one-step and template-free sol-gel route. The prepared nanocomposite exhibited good size uniformity and regularity. The enhanced photocatalytic activity of the NZT was evaluated in the degradation and mineralization of Indocorn Brilliant Red (M5B) under metal halide lamp irradiation. The effects of different parameters such as pH of the solution, and initial dye concentration on photodegradation of M5B were analyzed. The degradation of M5B follows pseudo-first order kinetics according to the Langmuir-Hinshelwood model. The experimental results showed that the initial concentration of azo dye in the dye mixture greatly affected the degradation efficiency. At M5B concentrations of 10 mg/L, the optimum conditions for the highest degradation efficiency (94%) of azo dye were a photocatalyst dosage of 0.01 g/L and an initial solution pH of 9. This study provided new insight into the design and preparation of nanomaterial demonstrated an excellent ability to remove organic pollutants in wastewater.

Key indicators: single-crystal X-ray study; T = 150 K; mean (C-C) = 0.007 Å; disorder in main residue; R factor = 0.054; wR factor = 0.158; data-to-parameter ratio = 14.0.The title complex [systematic name: bis(1,2-diaminopropane-2 2 N,N 0 )di--chlorido-1:2 2 Cl,2:3 2 Cl-dichlorido-1Cl,3Cltetrakis(triphenylphosphine)-1 2 P,3 2 P-tricopper(I,II,I) acetonitrile disolvate], [{(Ph 3 P) 2 Cl 2 Cu} 2 Cu(C 3 H 10 N 2 ) 2 ]Á2C 2 H 3 N, is a centrosymmetric linear trinuclear mixed-valence copper complex in which the central Cu II atom is bridged by Cl atoms to the two Cu I atoms. The coordination geometry is octahedral for Cu II , with Jahn-Teller elongation of the Cu-Cl bonds, and distorted tetrahedral for Cu I , with a wide P-Cu-P angle. The diamine ligands are twofold disordered, with occupancy factors of ca 0.6:0.4, and form one N-HÁ Á ÁCl hydrogen bond each with a terminal Cl atom.

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