【摘要】：采用液相還原法,以Na_2PdCl_4為鈀源,PVP為還原劑和分散劑,碘離子作為晶面選擇吸附劑和配位劑,硝酸根離子作為氧化蝕刻劑,水為溶劑,在n(Na_2PdCl_4)∶n(PVP)∶n(KI)∶n(NaNO_3)=1∶35∶10∶9和pH=11條件下,合成了形貌規(guī)整的純度大于99%的鈀三角雙錐單孿晶.碘離子在合成體系中主要通過改變鈀前驅(qū)體還原速率來影響鈀晶種的生長轉(zhuǎn)化和產(chǎn)物的形貌,對氧化蝕刻作用的影響在較高pH值下并不明顯.鉀離子和鈉離子比例的變化顯著影響了產(chǎn)物的形貌組成,此陽離子效應(yīng)可歸因于反應(yīng)體系在鈉離子存在時較鉀離子存在時表現(xiàn)出更快的鈀前驅(qū)體還原速率.
[Abstract]:Using Na_2PdCl_4 as palladium source, PVP as reductant and dispersing agent, iodine ion as crystal plane, nitrate ion as oxidation etch agent and water as solvent, palladium trihedral single twin with regular purity of more than 99% was synthesized by liquid phase reduction method under the condition of n (Na_2PdCl_4): n (PVP): n (KI): n (NaNO_3) = 1 鈮，

本文編號：2518595