unknown

Hydrothermal Synthesis and Characterization of Titanium, Bismuth and Rare−earth (Boro-) phosphates

Abstract

无机微孔材料在催化、分离吸附、离子交换等领域有着广泛的应用。金属–磷酸盐(MxOy–P2O5(–H2O),M=金属)体系是合成类沸石分子筛无机微孔材料的常见研究体系,但因磷氧基团(PO4)聚合度倾向较低,难以形成沸石分子筛所具有的复杂硅酸盐结构框架,限制了它的发展。在磷氧四面体(PO4)中,氧原子从磷原子处得到约1.25νμ(键价),它还需要从其它配位阳离子处得到0.75νμ以平衡其键价,而硼氧四面体(BO4)基团恰好可提供相应的键价。将B2O3引入金属–磷酸盐体系,形成既含硼氧基团又含磷氧基团的所谓硼磷酸盐化合物,极大地丰富了磷酸盐的结构类型,为寻找新型磷酸盐无机微孔材料提供新的途径。过去十...Inorganic microporous materials play an important role in the field of adsorption, separation, catalysis and ion-exchange. MxOy–P2O5–(H2O) (M = metal) systems have been shown to be a fruitful playground in search of new openframework inorganic materials. However, the low tendency of PO4 units to form polyphosphates in aqueous solutions limits the number of new compounds. By introducing bor...学位:工学博士院系专业:材料学院材料科学与工程系_材料物理与化学学号:2072007015346

    Similar works