标题:Highly-efficient photocatalytic degradation of methylene blue by PoPD-modified TiO2 nanocomposites due to photosensitization-synergetic effect of TiO2 with PoPD
作者:Yang C.; Dong W.; Cui G.; Zhao Y.; Shi X.; Xia X.; Tang B.; Wang W.
作者机构:[Yang, C] College of Geography and Environment, Shandong Normal University, Jinan, China, College of Resources and Environmental Sciences, China Agric 更多
通讯作者:Tang, B(tangb@sdnu.edu.cn)
通讯作者地址:Tang, B.; College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imag 更多
来源:Scientific Reports
出版年:2017
卷:7
期:1
DOI:10.1038/s41598-017-04398-x
摘要:Poly-o-phenylenediamine modified TiO2 nanocomposites were successfully synthesized via an 'in situ' oxidative polymerization method. The modified nanocomposites were characterized by BET, XRD, TEM, FT-IR, TGA, XPS, EA and UV-Vis DRS. The photocatalytic degradation of methylene blue was chosen as a model reaction to evaluate the photocatalytic activities of TiO2 and PoPD/TiO2. The results indicated that PoPD/TiO2 nanocomposites exhibited good photocatalytic activity and stability. The photocatalytic activity of PoPD/TiO2 increased as the initial pH increased because of electrostatic adsorption between the photocatalyst and MB as well as the generation of ·OH, whereas it exhibited an earlier increasing and later decreasing trend as the concentration of the photocatalyst increased owing to the absorption of visible light. The photocatalytic stability of the PoPD/TiO2 nanocomposite was dependent on the stability of its structure. Based on radical trapping experiments and ESR measurements, the origin of oxidizing ability of PoPD/TiO2 nanocomposites on photocatalytic degradation of MB was proposed, which taking into account of ·OH and ·O2 - were the first and second important ROS, respectively. The possible photocatalytic mechanism and photocatalytic activity enhanced mechanism has been proposed, taking into account the photosensitization effect and synergetic effect of TiO2 with PoPD. © 2017 The Author(s).
收录类别:SCOPUS;SCOPUS
Scopus被引频次:2
最新影响因子:4.259
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85021097081&doi=10.1038%2fs41598-017-04398-x&partnerID=40&md5=b6516cf7ae553b8df0875fd629017bb1
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