Papers by Author: Tao Yin

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Authors: Li Dong, Tao Yin, Lin Su, De Gang Fu
Abstract: Anode surface plays important role for extracellular electron transfer (EET) of exoelectrogenic microbes in microbial fuel cell (MFC). In this report, the electrochemical performance of a TiO2 nanorod array modified carbon paper electrode (TiO2 NRs/CP) is greatly improved by controlled chemical etching process. The etching process keeps the array morphology but yields obvious hollows on tops of TiO2 nanorods. The etched electrode (TiO2 NRs-HOT/CP) exhibits better hydrophilicity than carbon paper (CP) and TiO2 NRs/CP electrode as seen from smaller contact angle (CA) and more attached microbes S.loihica PV-4. Meanwhile, the hollows allow higher local concentration of microbial self-secreted flavins that can act as electron mediators for interfacial electron transfer of PV-4 through in-direct pathway. Accordingly, PV-4 produces larger current density at TiO2 NRs-HOT/CP electrode with maximum current density of 0.038 mA cm –2, which was much higher than that at CP electrode, and almost five times higher than that at un-etched TiO2 NRs/CP electrode.
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Authors: Tao Yin, Xiao Min Cai, Lin Su, Ling Wang, Fei Rong, Chun Wei Yuan, De Gang Fu
Abstract: Sediment microbial fuel cells (SMFCs) can generate electricity without maintenance in the field. SMFC is considered as an alternative renewable and sustainable power source. Though the SMFC is very appealing energy source, it presents certain challenges for real applications. Its output voltage and current are very low and its output voltage cant be increased by stacking several SMFCs in series in an open water body such as the lake. In this research, we construct and simulate a field SMFC with sediment from Xuanwu Lake in Nanjing, China. Open-circuit voltage of the SMFC is 750 mV and the maximal power density is 7.8 mW/m2. A custom-designed power management system (PMS) is developed to harvest energy from SMFC and boost the output power that can drive a wireless sensor. With the PMS, wireless sensor can utilize the harvested energy from SMFC and transmit data to computer without additional power source.
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