Fig. 7From: Ag+ colorimetric sensor based on graphene oxide/nano-platinum compositeEffects of A pH value during the preparation of GO/PtNPs at 180 °C, 0.24 mM H2PtCl6, 8 h; B H2PtCl6 concentration at 180 °C, pH 9.5, 8 h; C Hydrothermal reaction time at 180 °C, 0.24 mM H2PtCl6, pH 9.5; and D Reaction temperature at 0.24 mM H2PtCl6, pH 9.5, 9 hBack to article page