Photocatalytic Fuel Cell Based on Zinc Oxide Loaded Carbon Plate Photoanode for Simultaneous Photocatalytic Degradation of Azo Dyes and Electricity Generation

2020 ◽  
Vol 301 ◽  
pp. 175-182
Author(s):  
Yong Por Ong ◽  
Li Ngee Ho ◽  
Soon An Ong ◽  
Johar Banjuraizah ◽  
Abdul Haqi Ibrahim
Keyword(s):  
Zinc Oxide ◽  
Fuel Cell ◽  
Azo Dyes ◽  
Electricity Generation ◽  
Short Circuit ◽  
Reduction Process ◽  
Short Circuit Current ◽  
Acid Orange 7 ◽  
Carbon Plate ◽  
Photocatalytic Fuel Cell

Photocatalytic fuel cell (PFC) is promising to own its synchronous degradation of organic pollutants with electricity generation under illumination of light. The oxidation and reduction process promote the conversion of chemical energy in the pollutants into electrical energy. In this study, PFC is driven by the electrode reactions between the zinc oxide loaded carbon plate (ZnO/C) photoanode and carbon plate cathode under irradiation of UVA light. The ZnO/C photoanode was successfully fabricated by using simple ultrasonication-annealed method and investigated by XRD, SEM and EDX. To investigate the capability of the PFC, reactive red 120 (RR120), congo red (CR) and acid orange 7 (AO7) are employed well compared among themselves. The results indicated that the molecular structure of azo dyes with different adsorption of light by dye itself, number of azo bonds and sulfonic groups can be the crucial factors of decolorization in the PFC. The photocatalytic fuel cell with AO7 as sacrificial agent was able to perform 82.43% of decolorization efficiency, a maximum short circuit current (JSC) of 0.0017 mA cm-2 and maximum power density (Pmax) of 0.0886 µW cm-2.

scholarly journals Membraneless Photocatalytic Fuel Cell with Double Photoelectrodes for Simultaneous Electricity Generation and Pollutant Degradation

2022 ◽  
Author(s):  
Mingjuan Huang ◽  
Chunhong Zhou ◽  
Ruiting Wen ◽  
Jiuying Tian ◽  
Wenduo Huang ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Visible Light ◽  
Indium Tin Oxide ◽  
Electricity Generation ◽  
Short Circuit ◽  
Electric Energy ◽  
Short Circuit Current ◽  
Pollutant Degradation ◽  
Good Efficiency ◽  
Photocatalytic Fuel Cell

Abstract Environmental pollution and new energy development have become topics of increasing concern. Herein, a visible-light-driven photocatalytic fuel cell (PFC) with double photoelectrodes was constructed for simultaneous electricity generation and pollutant degradation, in which graphitic carbon nitride (g-C3N4) generated on W/WO3 nanorod arrays (W/WNR/g-C3N4) was used as the photoanode and Fe3+-doped CuBi2O4 thin film on indium tin oxide (ITO) conductive glass (ITO/CBFeO) was used as the photocathode. The experimental results showed that the WO3/g-C3N4 Z-scheme structure and one-dimensional WNR rod-like structure could effectively suppress the recombination of photogenerated charge carriers and enable W/WNR/g-C3N4 to present a good photocurrent response under visible light irradiation. The Fermi level mismatch between the W/WNR/g-C3N4 photoanode and ITO/CBFeO photocathode could improve the transfer of photogenerated electrons from the photoanode to the photocathode across the external circuit, enabling the constructed PFC to afford high electricity output and good efficiency for pollutant degradation. The short-circuit current density and maximum power density could reach 620 μA cm−2 and 110 μW cm−2, respectively, while the degradation ratio of oxytetracycline reached 97.6% in 90 min. Therefore, the proposed PFC system provides a new way to generate electric energy and degrade pollutants simultaneously.

Performance Enhancement of Actual Wastewater Treatment and Electricity Generation Through Surface Modified TiO2 Nanotube Arrays Based Photoanode Photocatalytic Fuel Cell

2021 ◽  
Vol 21 (10) ◽  
pp. 5188-5195
Author(s):  
Xicheng Li ◽  
Fengnan Yang ◽  
Tao Guo ◽  
Yang Zhang ◽  
Shaobin Yu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Ethylene Glycol ◽  
Electricity Generation ◽  
Noble Metals ◽  
Short Circuit ◽  
Actual Wastewater ◽  
Photocatalytic Fuel Cell ◽  
Surface Modified ◽  
Glycol Solution

Herein, we report a surface modified TiO2 nanowire arrays (NAs) photoanode based photocatalytic fuel cell (PFC) towards simultaneous enhancement of actual wastewater treatment and electricity generation under visible light irradiation. TiO2 NAs were facile fabricated via two-step anodization process in ethylene glycol and glycerin solution, respectively. Actual wastewater samples were directly applied to evaluate the PFC performance in terms of wastewater degradation and electricity generation through the as-prepared TiO2 NAs photoanode without loading noble-metals or semiconductors. TiO2 NAs photoanode prepared from ethylene glycol solution demonstrated a highly ordered surface network, exhibiting short-circuit current density and fill factor nearly 4.3 times and 1.4 times higher than pristine TiO2 NAs photoanode prepared according to previous reports. The experimental results revealed that the fabrication of TiO2 NAs by a facile surface modification in ethylene glycol solution can be considered a low-cost and scalable routine for enhancing performance of PFC photoanode towards efficient actual wastewater treatment and electricity generation.

Enhancement of simultaneous batik wastewater treatment and electricity generation in photocatalytic fuel cell

2018 ◽  
Vol 25 (35) ◽  
pp. 35164-35175 ◽  
Author(s):  
Wan Fadhilah Khalik ◽  
Li-Ngee Ho ◽  
Soon-An Ong ◽  
Chun-Hong Voon ◽  
Yee-Shian Wong ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Fuel Cell ◽  
Electricity Generation ◽  
Photocatalytic Fuel Cell

scholarly journals Prunus domestica dye extraction for fabrication of zinc oxide based dye-sensitized solar cells

BIBECHANA ◽  
2015 ◽  
Vol 13 ◽  
pp. 23-28
Author(s):  
Leela Pradhan Joshi
Keyword(s):  
Zinc Oxide ◽  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Zinc Nitrate ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Dye Extraction ◽  
Sensitized Solar Cells

Aluminium doped Zinc Oxide (AZO) seed layers were deposited on Fluorine doped Tin Oxide (FTO) substrates using a spin coating technique. These were then immersed in growth solutions of zinc nitrate, hexamethylenetetramine and distilled water to develop nanoplates of Zinc Oxide (ZnO). The nanostructures of ZnO grown on FTO were studied using x-ray diffraction techniques. Dye-sensitized solar cells (DSSC) were fabricated using two prepared electrodes, one of dye-loaded zinc oxide and another that was platinum coated. The electrolyte used was potassium iodide iodine solution. The performance of the assembled DSCCs was tested by drawing an IV curve. The results showed that the short circuit current and open circuit voltages were about 10 microamperes and 270 millivolts respectively.BIBECHANA 13 (2016) 23-28

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