SYNTHESIS OF RGO/ZNO/FE2O3 COMPOSITE CATALYST FROM ZINC DROSS FOR SYNTHETIC DYE PHOTODEGRADATION APPLICATIONS UNDER VISIBLE LIGHT
Synthetic dye is classified as one of recalcitrant pollutants that are difficult to be removed through conventional waste treatment. One interesting alternative waste treatment is photocatalysis because of its capability to completely degrade organic waste by harnessing sunlight. However, photocatal...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/66162 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Synthetic dye is classified as one of recalcitrant pollutants that are difficult to be removed through conventional waste treatment. One interesting alternative waste treatment is photocatalysis because of its capability to completely degrade organic waste by harnessing sunlight. However, photocatalysis such as ZnO is constrained by low efficiency caused by high bandgap and fast recombination. To overcome this issue, in this research, ZnO composite with materials such as Fe2O3 and reduced graphene oxide (rGO) were synthesized by sol gel method with ZnO and Fe2O3 source from zinc dross (ZD) which is a steel galvanizing industry waste which would be an environmentally friendly synthesis with alternative raw material source.
Based on XRD, Raman, FESEM-EDS, and DR UV-Vis, and FTIR characterization, ZnO and Fe2O3 were successfully synthesized by using sol gel method. Based on XRD, Raman, FESEM-EDS, and DR UV-Vis characterization, ZD and rGO/ZD were successfully synthesized by using microwave irradiation method. Based on UV-Vis characterization during photocatalysis experiment, rGO/ZD were able to degrade more Rhodamine 6G (R6G) compared to ZnO, Fe2O3, and rGO with 37% R6G were degraded under visible light. Fe2O3 would reduce bandgap and form heterojunction with ZnO and rGO would play a role in electron transfer to prevent fast recombination, act as R6G adsorption site, ZnO/Fe2O3 nucleation site, and also photocatalytic reaction site between electron and oxygen.
It can be concluded that ZnO, Fe2O3, ZD and rGO/ZD were successfully synthesized. Photocatalytic performance of rGO/ZD were promising through the addition of Fe2O3 and rGO that improve the photocatalytic performance of ZnO.
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