用改进的液相沉淀法制备zns纳米晶.pdf

文档介绍：第 ll 卷第 l 期材料科学与工艺
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2 0 0 3 年 3 月 MATERIALS SCIENCE & TECHNOLOGY Mar. 2003
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用改进的液相沉淀法制备 ZnS 纳米晶
翟永清,姚子华,丁士文,安伟,翟建
(河北大学化学与环境科学学院,河北保定 07l000)
摘要:以(、) 为原料,通过加入分散剂对传统的液相沉淀法进行改进,制备出的纳米粉末,
ZnSO4 NH4 2S ZnS
并探讨了制备过程中沉淀、洗涤、干燥以及晶化等阶段的反应条件对产物的影响. 结果表明:以丙三醇为分散
剂、原料配比( ( ) (( ) )为、料液浓度比,( )、(( ) )均为时
! ZnSO4 / ! NH4 2S l1l " ZnSO4 " NH4 2 S mOI / L
为沉淀适宜工艺条件;干燥前对沉淀物用无水乙醇进行脱水处理,可有效地控制硬团聚体的产生;沉淀经
晶化,可得立方晶形纳米晶,产物为均匀球形,分散性较好; 晶化的产物晶粒尺
400 ~ 600 C l h !- ZnS 400 C
寸约为 40 nm;600 C晶化的产物晶粒尺寸约为 50 nm.
关键词:ZnS;纳米晶;液相沉淀;分散剂
中图分类号: 文献标识码:A 文章编号:l005 - 029(9 2003)0l - 0097 - 04
Preparing nanocrystalline ZnS by using on the improved precipitation method
ZHAI YOng-ging,YAO Zi-hua,DING Shi-wen,AN Wei,ZHAI Jian
(COIIege Of Chemistry and EnvirOnment Science,Hebei University,baOding 07l000,China)
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Abstract Using ZnSO4 and NH4 2S as the raw materiaIs nanOcrystaIIine ZnS was prepared by using an imprOved
precipitatiOn methOd with the additiOn anic dispertant. The effects Of reactive cOnditiOns On the prOducts were
discussed. The resuIts shOw that the prOper cOnditiOns are that gIycerOI is used as dispertant,
( ) (( ) ) , ( )
the mOIar ratiO Of ! ZnSO4 and ! NH4 2 S is l 1 0 . 9 the cOncentratiOn ratiO Of " ZnSO4 and
(( ) ) ,
" NH4 2S is . Washing and de