Synthesis, Property Characterization and Photocatalytic Activity of the Novel Composite Polymer Polyaniline/Bi2SnTiO7

Molecules

Yunjun Yang¹ 

[1]State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China

关键词: polyaniline/Bi₂SnTiO₇;    photocatalytic activity;    methylene blue;    visible light irradiation;    photodegradation pathway;   

DOI  :  10.3390/molecules17032752

来源: mdpi

【 摘 要 】

A novel polyaniline/Bi₂SnTiO₇ composite polymer was synthesized by chemical oxidation in-situ polymerization method and sol-gel method for the first time. The structural properties of novel polyaniline/Bi₂SnTiO₇ have been characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and X-ray spectrometry. The lattice parameter of Bi₂SnTiO₇ was found to be a = 10.52582(8) Å. The photocatalytic degradation of methylene blue was realized under visible light irradiation with the novel polyaniline/Bi₂SnTiO₇ as catalyst. The results showed that novel polyaniline/Bi₂SnTiO₇ possessed higher catalytic activity compared with Bi₂InTaO₇ or pure TiO₂ or N-doped TiO₂ for photocatalytic degradation of methylene blue under visible light irradiation. The photocatalytic degradation of methylene blue with the novel polyaniline/Bi₂SnTiO₇ or N-doped TiO₂ as catalyst followed first-order reaction kinetics, and the first-order rate constant was 0.01504 or 0.00333 min⁻¹. After visible light irradiation for 220 minutes with novel polyaniline/Bi₂SnTiO₇ as catalyst, complete removal and mineralization of methylene blue was observed. The reduction of the total organic carbon, the formation of inorganic products, SO₄²⁻ and NO₃₋, and the evolution of CO₂ revealed the continuous mineralization of methylene blue during the photocatalytic process. The possible photocatalytic degradation pathway of methylene blue was obtained under visible light irradiation.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.