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Wu Y.,South China University of Technology | Wu Y.,Key Laboratory Of Poll Control And Ecosystem Restoration In Industry Clusters Of Ministry Of Education | Luo H.,South China University of Technology | Luo H.,Key Laboratory Of Poll Control And Ecosystem Restoration In Industry Clusters Of Ministry Of Education | Wang H.,Hunan University
RSC Advances | Year: 2014

To improve the utilization efficiency of MOF catalysts, iron(iii)-based metal-organic framework/graphene oxide composites were prepared by a facile method. The composites afforded fast degradation performance and high catalytic efficiency for degradation of methylene blue and rhodamine B under exposure to natural sunlight. This journal is © the Partner Organisations 2014.


Zhu N.,South China University of Technology | Zhu N.,Key Laboratory Of Poll Control And Ecosystem Restoration In Industry Clusters Of Ministry Of Education | Chen X.,South China University of Technology | Tu L.,South China University of Technology | And 4 more authors.
Advanced Materials Research | Year: 2012

Stacking microbial fuel cells (MFCs) in series can provide higher voltage; however, voltage reversal (VR) adversely affects performance of the stacked MFCs. In this paper, diodes are introduced into three stacked MFCs so as to investigate the VR behavior and offer a diodes-based explanation of the VR. The results show that VR occurs in the different stacked MFCs systems. VR of the stacked MFCs connected with forward diodes (∼0.37 V) happens in a similar pattern as that without diodes (∼0.80 V). However, it only happens at the end of a cycle. This can be analyzed that the resistance of the diodes consume a part of the flowing electrons and the speed of potential changes of the electrodes slows down. Differently, in the stacked MFCs connected with reverse diodes, the voltages of each unit MFC approximately equal their open circuit voltages (∼0.75 V), and VR happens in the unit MFC with reverse diodes at the cathode end only. It implies that the imbalanced consumption of electrons in unit MFCs and the potential changes of specific electrode directly result in VR.

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