Synthesis, Characterization, and Photoluminescence Properties of 2-Amino 6-Nitrobenzothiazole-Melamine-Formaldehyde Copolymer-Charcoal Composite. Indian Journal of Engineering and Materials Sciences (IJEMS), [S. l.], v. 30, n. 6, p. 838, 2023. DOI: 10.56042/ijems.v30i6.4529. Disponível em: https://or.niscpr.res.in/index.php/IJEMS/article/view/4529. Acesso em: 13 may. 2026.