研究目的
To design an anion exchange membrane electrode assembled photoelectrochemical cell for simultaneously degrading organics and generating electricity.
研究成果
The study demonstrates the feasibility of using an anion exchange membrane in photoelectrochemical cells for simultaneous wastewater treatment and electricity generation. The cell performance was improved with increased electrolyte concentration, ethanol concentration, and light intensity, although the maximum light utilization efficiency decreased with increased light intensity.
研究不足
The ability of wastewater treatment and electricity output are still relatively small. Integrating numerous PECs may be expected to be a possible approach to solve this issue and meet the requirement of real applications.
The experimental scheme involved the construction of a membrane electrode assembly (MEA) consisting of a photoanode, a cathode, and an anion exchange membrane. The photoanode was prepared by constructing a TiO2 film on carbon paper and sensitizing it with CdS-ZnS quantum dots. The cathode was prepared by depositing Pt black on carbon black coated carbon paper. The MEA was assembled by holding the cathode and photoanode with the anion exchange membrane in between. The performance of the cell was evaluated under various conditions including different electrolyte concentrations, ethanol concentrations, and light intensities.
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34972A data acquisition unit
34972A
Agilent
Used to record the open circuit voltage, short circuit current density, and polarization curves.
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D8 ADVANCE X-ray diffraction
D8 ADVANCE
Bruker
Used to characterize the crystalline phase of the prepared photoanode.
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S4800 field emission scanning electron microscope
S4800
Hitachi
Used to characterize the morphology of the prepared photoanode.
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7500ce inductively coupled plasma mass spectrometry
7500ce
Agilent
Used to measure the amount of cadmium and zinc species in the prepared photoanode.
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GC-2010 Plus gas chromatograph
GC-2010 Plus
Shimadzu
Used to test the variation of the ethanol concentration.
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Aeroxide P25 TiO2 nanoparticles
P25
Acros Organics
Used for the preparation of the TiO2 colloid.
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Polyethylene grafted polystyrene quaternary ammonium anion exchange membrane
HoAM G1204-05
Lvhe Technology Co., Ltd
Used as the anion exchange membrane in the photoelectrochemical cell.
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Toray 090 carbon paper
090
Hesen Electric Co., Ltd
Used as the substrate for the photoanode and cathode.
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Pt black
Hesen Electric Co., Ltd
Used as the electrocatalyst for the cathode.
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Nafion? perfluorinated resin
Hesen Electric Co., Ltd
Used in the preparation of the cathode.
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Nafion? 211 proton exchange membrane
211
Hesen Electric Co., Ltd
Used for comparison in the study.
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LSP04-1A syringe pump
LSP04-1A
Longer-Pump
Used to continuously supply the mixture solution into the cell.
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CT-3008 electronic load
CT-3008
Neware Technology Ltd.
Used to record the open circuit voltage, short circuit current density, and polarization curves.
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CEL-HXF300 300W Xe lamp
CEL-HXF300
Aulight
Used to simulate the solar illumination to the cell.
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FZ-Z visible radiometer
FZ-Z
Used to measure the light intensity on the photoanode.
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