A highly efficient immobilized ZnO/Zn photoanode for degradation of azo dye Reactive Green 19 in a photocatalytic fuel cell.
Photocatalytic fuel cell (PFC) is a potential wastewater treatment technology that can generate electricity from the conversion of chemical energy of organic pollutants. An immobilized ZnO/Zn fabricated by sonication and heat attachment method was applied as the photoanode and Pt/C plate was used as the cathode of the PFC in this study. Factors that affect the decolorization efficiency and electricity generation of the PFC such as different initial dye concentrations and pH were investigated. Results revealed that the degradation of Reactive Green 19 (RG19) was enhanced in a closed circuit PFC compared with that of a opened circuit PFC. Almost 100% decolorization could be achieved in 8 h when 250 mL of 30 mg L-1of RG19 was treated in a PFC without any supporting electrolyte. The highest short circuit current of 0.0427 mA cm-2and maximum power density of 0.0102 mW cm-2was obtained by PFC using 30 mg L-1of RG19. The correlation between dye degradation, conductivity and voltage output were also investigated and discussed.
School of Materials Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
Sin-Li
SL
Lee
School of Materials Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia. Electronic address: holingee@yahoo.com.
Li-Ngee
LN
Ho
Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
Soon-An
SA
Ong
Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
Yee-Shian
YS
Wong
Institute of Nano Electronic Engineering, Universiti Malaysia Perlis, 01000 Kangar, Perlis, Malaysia.
Chun-Hong
CH
Voon
Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
Wan Fadhilah
WF
Khalik
Water Research Group (WAREG), School of Environmental Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
Nik Athirah
NA
Yusoff
School of Materials Engineering, Universiti Malaysia Perlis, 02600 Arau, Perlis, Malaysia.
Noradiba
N
Nordin
D001391:Azo Compounds / Q000737:chemistry* / Q000302:isolation & purification; D004396:Coloring Agents / Q000737:chemistry* / Q000302:isolation & purification; D011211:Electric Power Supplies; D004566:Electrodes; D055668:Photochemical Processes; D062065:Wastewater / Q000737:chemistry; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*; D015032:Zinc / Q000737:chemistry*; D015034:Zinc Oxide / Q000737:chemistry*
D001391:Azo Compounds; D004396:Coloring Agents; D062065:Wastewater; D015032:Zinc; D015034:Zinc Oxide; C000614522:reactive green 19
Azo dye Reactive Green 19; Conductivity; Degradation; Electricity generation; Immobilized ZnO/Zn; Photocatalytic fuel cell