Mardiana M, Ratnawulan R. The Effect Of Composition Variation On The Functional Groups Of Coconut Husk Ash Silica Nanocomposites With Titanium Dioxide. Department of Physics, Universitas Negeri Padang [Internet]. 2024 Oct. 31 [cited 2024 Nov. 21];2(3). Available from: https://jeap.ppj.unp.ac.id/index.php/jeap/article/view/66