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Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Faculty for Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Piata Victoriei No. 2, Timisoara 300006, Romania
Faculty of Mechanical Engineering, Politehnica University Timisoara, 1 Mihai Viteazu Blv., Timisoara 300222, Romania
Department of Oxide Materials Science and Engineering, Faculty of Applied Chemistry and Materials Science, Polytehnic University of Bucharest, Gh. Polizu Street No.1-7, Bucharest 011061, Romania
Authors to whom correspondence should be addressed.
Catalysts 2018, 8(5), 210;
Received: 31 March 2018 / Revised: 10 May 2018 / Accepted: 12 May 2018 / Published: 15 May 2018
(This article belongs to the Special Issue Nanomaterials for Environmental Purification and Energy Conversion)
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Zinc chromite (ZnCr2O4) has been synthesized by the thermolysis of a new Zn(II)-Cr(III) oxalate coordination compound, namely [Cr2Zn(C2O4)4(OH2)6]·4H2O. The coordination compound has been characterized by chemical analysis, infrared spectroscopy (IR), and thermal analysis. The zinc chromite obtained after a heating treatment of the coordination compound at 450 °C for 1 h has been investigated by XRD, FE-SEM, TEM/HR-TEM coupled with selected area electron diffraction (SAED) measurements. The photocatalytic performance of nanosized zinc chromite was assessed for the degradation and mineralization of humic acid (HA) from a drinking water source, envisaging the development of the advanced oxidation process for drinking water treatment technology. A mineralization efficiency of 60% was achieved after 180 min of 50 mg L−1 HA photocatalysis using zinc chromite under UV irradiation, in comparison with 7% efficiency reached by photolysis. View Full-Text
Keywords: zinc chromite; photocatalysis activity; oxalate; humic acid zinc chromite; photocatalysis activity; oxalate; humic acid

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Dumitru, R.; Manea, F.; Păcurariu, C.; Lupa, L.; Pop, A.; Cioablă, A.; Surdu, A.; Ianculescu, A. Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water. Catalysts 2018, 8, 210.

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