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Photocatalytic degradation of MB as an organic dye over a novel MOF/BiFeO3 composite
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1  Department of Chemistry, Iran University of Science and Technology, Tehran, Iran



Organic Pigments are one of the most common pollutants in waste water of many industries such as textiles, chemicals, etc [1]. One of these hazardous pigments is methylene blue, a cationic pigment being a mutagen, carcinogen and resistant to biological decomposition [2]. There are various techniques to eliminate this pollutant, for example, chemical oxidation [3], floatation and coagulation [4], electrochemical treatment [5], liquid-liquid extraction [6], membrane filtration [7], ozonation [8] and surface adsorption [9]. Another way of eliminating this pollutant is photocatalytic analysis. Among these treatment methods, photocatalysis is a green and suitable technology to decrease organic pollutants in wastewater which has considered as a promising approach for pollution abatement and recovering of wastewaters [10]. Many studies have been reported that numerous organic pollutants can be decomposed completely through photocatalysis using metal oxide semiconductor nanostructure under UV irradiation [11]. Due to this reason that only about 4% of the solar spectrum is in the UV region, various high performance visible light photocatalysts have been developed [12]. However to the best of our knowledge, MOFs and their composites have not been widely studied for the photocatalytic degradation of organic dyes from wastewater pollutions. In this work, for the first time, we have synthesized a novel MOF/BiFeO3 composite as a catalyst with a high efficient photocatalytic capability for the degradation of methylene blue (MB) in visible light range in the presence of LED 5W lamp. The nanoscale pores in addition to the photocatalytic degradation process, causing part of the contaminants to be removed from the environment by adsorption. 


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Keywords: Key words: Organic dye, MOF/BiFeO3, Photocatalyst