Ultrahigh adsorption capacities of fluorescein sodium and Congo red achieved in mixed-halide [BiI3Cl2] and methylviologen dication

Publication date: 1 November 2019Source: Materials Letters, Volume 254Author(s): J. Wang, J. Zheng, S.T. Wang, J. Sun, Y.M. Guo, H. Wang, S.G. Huang, Y.D. Li, C.C. WangAbstractOrganic dye contaminants are becoming a worldwide challenge for water resources due to their non-natural degradation, highly toxic and carcinogenic. In this work, the molecular ferroelectric material (MV)[BiI3Cl2] synthesized by the solvothermal method was first applied to the adsorption of organic dye contaminants. Interestingly, the adsorption capacity of the (MV)[BiI3Cl2] powder was found to reach a high value of 793 and 10,476 mg g−1 for fluorescein sodium and Congo red, respectively. The adsorption process can be well described by the Langmuir model. It was argued that the electrostatic attraction, hydrogen bonding and π-π interaction might play a major role in the adsorption process.
Source: Materials Letters - Category: Materials Science Source Type: research