aqueous solution containing ZnCl2 and Na2HPO4. A zinc oxide was also synthesized under the same conditions by precipitation from aqueous ZnCl2. Addition of Na2CO3 to the medium and heating at 323-343 K for 6 h gave rise to NaZnPO4 (solid NaZnP) and ZnO, respectively, both of which were found to exhibit excellent activity in the dehydrogenation of cyclohexanol. XRD and IR analyses revealed amorphous Na2CO3
在该工作中,通过从包含ZnCl 2和Na 2 HPO 4的
水溶液中沉淀来合成Zn 3(PO 4)2(固体ZnP)。在相同条件下,还通过从ZnCl 2
水溶液中沉淀来合成
氧化锌。向介质中添加Na 2 CO 3并在323-343 K下加热6 h ,分别生成NaZnPO 4(固体NaZnP)和ZnO,发现它们在
环己醇的脱氢中均表现出优异的活性。XRD和IR分析显示无定形Na 2 CO 3沉积在固体表面上,以及由于形成的ZnCO 3分解而可能残留的
氧化锌。固体表面上Na 2 CO 3的存在增加了其碱性,并抑制了
环己醇的脱
水。在773 K下,Zn 3(PO 4)2产生
环己烯和
环己酮,而在相同的反应条件下,NaZnPO 4选择性地产生酮。