کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4480873 1623066 2016 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hybridization of photoanode and bioanode to enhance the current production of bioelectrochemical systems
ترجمه فارسی عنوان
هیبریداسیون آند تصویری و آند زیستی به منظور افزایش تولید فعلی سیستم های الکتروشیمیایی زیستی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی


• High current density and short start-up time were achieved by PBEC.
• The photo-bio-anode accelerated biofilm formation and Geobacter enrichment.
• The photo-bio-anode reduced the charge-transfer resistance of the anode/biofilm.
• The photo-bio-anode kept long-term stability under visible light illumination.

Bacterial extracellular electron transfer is one of the main bottlenecks in determining the efficiency of bioelectrochemical systems. Here, we report a photobioanode that combines carbon material with a photocatalyst (α-Fe2O3), utilizing visible light to accelerate biofilm formation and extracellular electron transfer in bioelectrochemical systems. Cyclic voltammetric studies of this photobioanode revealed active electron transfer at the anode/biofilm interface. The charge-transfer resistance of the anode/biofilm was ca. 46.6 Ω, which is half that of the unmodified anode. In addition, the results of confocal laser scanning microscopy and bacterial community analysis indicate that the photobioanode and light can accelerate biofilm formation and enrich exoelectrogens. When equipped in photo-bioelectrochemical systems, the start-up time was shortened from about 2.5 days to 1.1 days. The maximum current density of photo-bioelectrochemical systems was almost twice that of a control bioelectrochemical system. In addition, the current density of the photo-bio-electrochemical cell (PBEC) showed almost no decrease after being subjected to 40 d of illumination. This photobioanode is therefore a cost-effective, energy-clean, environment-friendly anode with high electrocatalytic activity and long-term stability, which has broad prospects in various processes, including wastewater treatment, bioelectricity generation, bioelectricity synthesis, and hydrogen production.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 102, 1 October 2016, Pages 428–435
نویسندگان
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