Doping nikel (Ni) metal in zeolitic imidazolate framework-8 using green synthesis methodRahmatul Fajri, Puji Wahyuningsih, Jofrishal Jofrishal and Ratna EdiatiE3S Web Conf., 339 (2022) 02003DOI: https://doi.org/10.1051/e3sconf/202233902003