Catalytic Activity of LDH-TiO2 and LDH-ZnO in Photodegradation of Procion Red

Nova Yuliasari (Doctoral Program, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Sriwijaya, Palembang, 30139, Indonesia)
Amri Amri (Magister Program Graduate School of Mathematics and Natural Sciences (FMIPA), Universitas Sriwijaya, Palembang, 30139, Indonesia)
Risfidian Mohadi (Research Center of Inorganic Materials & Coordination Complexes, Faculty of Mathematics and Natural Sciences (FMIPA), Sriwijaya University, Palembang, 30139, Indonesia)
Elfita Elfita (Doctoral Program, Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Sriwijaya, Palembang, 30139, Indonesia)
Aldes Lesbani (Research Center of Inorganic Materials & Coordination Complexes, Faculty of Mathematics and Natural Sciences (FMIPA), Sriwijaya University, Palembang, 30139, Indonesia)

Science and Technology Indonesia
Vol. 8 No. 2 (2023): April

Pristine layered double hydroxides (LDHs) which have been modified into LDHs-metal oxide composite were applied as procion red (PR) photodegradation catalysts. The preparation was performed using a low calcination temperature of 300°C. Optimization variations include pH, catalyst weight and catalysis time. The degradation percentages of Mg/Al LDH, Mg/Al-TiO2 and Mg/Al-ZnO were 51.8%, 72.0% and 89.5%, respectively. The percentage of degradation of Zn/Al LDH, Zn/Al-TiO2 and Zn/Al-ZnO were 44.0%, 61.2% and 58.4%, respectively. The study results showed that all composites produced a greater percentage of PR degradation and better reusability than pristine LDH. Mg/Al LDH-based catalysts tend to catalyze PR better than Zn/Al LDH-based catalysts. PR which is an anionic dye when photodegraded using Mg/Al-ZnO tends to be better than Mg/Al-TiO2 meanwhile Zn/Al-TiO2 and Zn/Al-ZnO have competitive performance.