Mohamad Zahir, N. F., Setiabudi, H. D., Jusoh, R., & Kamarudin, N. H. N. (2020). Photocatalytic degradation of methylene blue using Zn/SBA-15 synthesized from palm oil fuel ash. Malaysian Journal of Catalysis, 4(1). https://doi.org/10.11113/mjcat.v4n1.142