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

1
Faculty for Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Piata Victoriei No. 2, Timisoara 300006, Romania
2
Faculty of Mechanical Engineering, Politehnica University Timisoara, 1 Mihai Viteazu Blv., Timisoara 300222, Romania
3
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; https://doi.org/10.3390/catal8050210
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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Abstract

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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