Ulya, Lulu'atul Hamidatu 
ORCID: https://orcid.org/0009-0009-8845-7948, Faiza, Aulia Nur, Maulani, Makhro Fitri, Kustomo, Kustomo and Kholidah, Kholidah
(2025)
Natural zeolite as a supporting material of TiO2 and ZnO photocatalysts for UV-induced Congo red photodegradation.
Presented at 15th International Conference on Green Technology (ICGT 2025), 29 Jul 2025 - 30 Jul 2025, Malang, Indonesia.
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Abstract
Congo red dye (CRD) is highly toxic and can harm aquatic organisms. Photodegradation is an alternative solution that can be used to treat dyes. TiO2 and ZnO are semiconductor materials commonly utilised in photocatalysts due to their photocatalytic activity. Yet, both TiO2 and ZnO have a small surface area; hence, their performance is inadequate when employed in their bare state. The photocatalytic activity of TiO2 and ZnO can be enhanced by depositing them on the zeolite. Both were attached to natural zeolite using the sonication method, and the photocatalytic activity was examined with variation in irradiation time, photocatalyst mass, and dye concentration. The XRD results show that TiO2-natural zeolite (TNZ) and ZnO-natural zeolite (ZNZ) contain an anatase phase of TiO2, a wurtzite phase of ZnO and mordenite zeolite. Then, the results of the FTIR spectra of TNZ and ZNZ showed that TiO2 and ZnO were successfully embedded on the surface of the natural zeolite (NZ). The optimum time obtained in the CRD photodegradation process was 100 minutes, and the optimum concentration of CRD degradation was 10 ppm for TNZ and 15 ppm for ZNZ photocatalysts. Interestingly, the optimum mass of TNZ and ZNZ photocatalyst was 30 and 200 mg, respectively.
| Item Type: | Conference (Paper) |
|---|---|
| Keywords: | TiO2, ZnO, photocatalyst, photodegradation, Congo red |
| Subjects: | 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030203 Inorganic Green Chemistry |
| Divisions: | Faculty of Mathematics and Sciences > Department of Chemistry |
| Depositing User: | M.Sc Lulu'atul Hamidatu Ulya |
| Date Deposited: | 27 Jul 2026 15:17 |
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