Or Yang Jai Xien, et al. “Ground Coffee Waste-Derived Activated Carbon: A Sustainable Adsorbent and Photocatalyst for Effective Methylene Blue Dye Degradation”. International Journal of Nanoelectronics and Materials (IJNeaM) , vol. 17, no. December, Dec. 2024, pp. 95-101, doi:10.58915/ijneam.v17iDecember.1612.