The NaBH4 Reduction and pH Effects on the Optical Property of Bismuth VanadateAnung Riapanitra, Michael Julian Haryanto, Tien Setyaningtyas, Kapti Riyani and Santi Nur HandayaniE3S Web Conf., 609 (2025) 02001DOI: https://doi.org/10.1051/e3sconf/202560902001