Graphene-supported biomimetic catalysts with synergistic effect of adsorption and degradation for efficient dye capture and removal

Publication date: Available online 18 April 2019Source: Chinese Chemical LettersAuthor(s): Qin Li, Xiaopei Wang, Xueqing Xiong, Shuihong Zhu, Zhaohui Meng, Yongying Hong, Changxu Lin, Xiang Yang Liu, Youhui LinAbstractDesign and development of iron porphyrin-based artificial enzymes system have been attracting a lot of attention. Herein, without any toxic reductant and harsh processing, we present a facile one-pot method to fabricate bifunctional catalytic nanocomposites consisting of graphene and hemin by using vitamin c as a mild reduction reagent. The presence of graphene helps the formation of a high degree of highly active and stable hemin on the graphene surface in a monomeric form through their π−π stacking interaction. As a result, such nanocomposites possess a superior adsorption capacity and intrinsic peroxidase-like catalytic activity. Moreover, by the combination of their dye adsorption ability, RGO-hemin nanocomposites can serve as a suitable candidate for efficient capture and removal of dyes via a synergistic effect. Our findings may pave the way to apply graphene-supported artificial enzymes in a variety of fields, such as environmental chemistry, bionics, medicine, and biotechnologyGraphical abstractA green and facile strategy for preparation of hemin-graphene nanocomposites was reported by utilizing vitamin C as a reductant. The as-synthesized nanocomposites can be applied in the removal of dyes via synergistic adsorption and degradation.
Source: Chinese Chemical Letters - Category: Chemistry Source Type: research