title: CR@BaSO4: an acid rain-indicating material.
abstract: The CR@BaSO(4) hybrid was synthesized, characterized and used as an acid rain-indicating (ARI) material. A painted ARI umbrella was discolored after exposure to simulated acid rain of pH 5 or less and returned to the initial color after the rain stopped. Such a functionalized material may make acid rain visual to remind people in real-time.
authors: State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China. hwgao@tongji.edu.cn
authors: Hong-Wen
authors: HW
authors: Gao
authors: Xin-Hui
authors: XH
authors: Xu
mesh_terms: D015258:Acid Rain / Q000032:analysis*; D001466:Barium Sulfate / Q000737:chemistry*; D003224:Congo Red / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D049329:Nanostructures / Q000737:chemistry
chemical_list: D015258:Acid Rain; D001466:Barium Sulfate; D003224:Congo Red