作　　者： ; ; ;

机构地区： 邢台学院化学系

出　　处： 《河北师范大学学报（自然科学版）》 2004年第1期55-59,共5页

摘　　要： 在室温和EDTA存在的条件下,氧气氧化Fe(OH)2制备纯相的δFeOOH,只能选用碱比(R)小于0.500的NaOH为沉淀剂.实验以R均大于0.625的沉淀剂NH3·H2O,Na2CO3及NH4HCO3分别取代NaOH,得到了不同的pH值变化趋势及产物.结果表明,在一特定条件下,沉淀剂的R对制备纯相非晶态δFeOOH起关键的作用. On condition that EDTA was presented under room-temperature,only NaOH(whose value of alkali ratio R<0.500)can be used as precipitating agent in the course of preparation of purity-phase amorphous δ-FeOOH with Fe(OH)_2 oxidized by oxygen.The different pH variation trend and products from expected ones was attained by replacing NaOH with NH_3·H_2O,Na_2CO_3 and NH_4HCO_3 respectively(whose values of R0.625).As a result of our tests,under a certain conditions,the value of R of the precipitaing agent had decisive effect on the preparation of purity-phase amorphous δ-FeOOH.

关 键 词： 沉淀剂 碱比 非晶态 氧气氧化

领　　域： [理学] [理学]