Organic pollutants are the largest kind of pollutants released into waters and wastewater from the some industry and industrial processes. Photocatalytic degradation is one of the significant and effective methods to remove the dyes and other organic pollutant from water and wastewater. This mini-review presents the application of zinc ferrites and ZnFe2O4-based composites in the photocatalytic degradation of organic dye. The zinc ferrite nanomaterials are obtained mainly by thermal methods, sol-gel, co-precipitation, and solid-state or hydrothermal route. Zinc Ferrites have good photocatalytic activity, but when exploited as composite photocatalysts, their photocatalytic efficiency were increased. AS a critical magnetic material, the ZnFe2O4 spinel structure has been proven to be useful in removal dye, ZnFe2O4 have photocatalytic activity under visible light irradiation. However, it is possible to improve the efficiency of photocatalysis activity of ZnFe2O4 by coupling it with another semiconductor or coupling it with carbon nanotubes and graphene, resulting in enhanced photocatalytic performance. Abstract: Biography:Fatemeh Ajormal has completed BS in chemistry in Shahid Chamran University from ahwaz in 2010. She has Master's degree in organic chemistry from University of Zanjan, at the moment she is a PhD student in organic chemistry. Her area of research interest is synthesis of heterocyclic Compounds, Synthesis of complexes and Application of Catalytic them.

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Three Cu(II) coordination compounds, [Cu(L1)(Cl2)] (1), [Cu(L1)(Br2)] (2), and [Cu(L2)(Cl)]Cl∙(C2H4O3)0.5(H2O)0.5 (3), were synthesized and characterized by various spectroscopic methods and single crystal X-ray analysis where L1 and L2 are oxazolo[3,4-c]...

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A new 1D azido bridged Cu(II) coordination polymer with 1,3‐oxazolidine based ligand, [Cu(H3L)(μ1,3‐N3)(N3)]n (1), was synthesized and characterized by elemental analysis and spectroscopic methods. The structure of 1 was also determined by single crystal X‐ray analysis which indicated the 1D polymeric chain is generated by end‐to‐end (EE) azide bridge. The obtained compound was employed as catalyst in green click synthesis of β‐hydroxy‐1,2,3‐triazoles from one‐pot three‐component cycloaddition reaction of epoxide‐azide‐alkyne. The catalytic reactions were carried out in water as a safe, cheap and green solvent. The catalytic studies indicated that the obtained 1D azido bridged Cu(II) coordination polymer is an active catalyst for preparing β‐hydroxy‐1,2,3‐triazoles. The effect of temperature on the selectivity of the catalytic system was studied and the results indicated this catalytic system has high selectivity at low temperatures. The structure the product obtained from the reaction of 2,3‐epoxypropylphenylether, azide and 1‐ethynyl‐1‐cyclohexanol (T4) was determined by single crystal X‐ray analysis. The results indicate Cu(II) coordination polymers can be a new class of catalytic systems for green click synthesis of 1,2,3‐triazoles.