Template-free microwave-assisted synthesis of FeTi coordination complex yolk-shell microspheres for superior catalytic removal of arsenic and chemical degradation of methylene blue from polluted water

Yolk-shell FeTi coordination complex microspheres were synthesized using a template-free microwave-assisted hydrothermal method. The influences of hydrothermal reaction time and temperature on the morphology and structure were investigated in details. The FeTi coordination complex microspheres with a yolk-shell structure were tested to be an excellent catalyst to transform As (III) to As (V) as well as an adsorbent to effectively remove As (V) ions from solution with an adsorption capacity as high as 2353 mg g(-1) according to Langmuir adsorption model. The FeTi yolk-shell microspheres presented a rapid chemical degradation towards organic materials such as methylene blue (MB) by Fenton reaction without any secondary pollution. The catalytic reaction mechanism of transformation of As (III) and degradation of MB was confirmed by fluorescence spectroscopy. (C) 2019 Published by Elsevier B.V.