24小时热门版块排行榜    

查看: 629  |  回复: 0

loneox

金虫 (小有名气)

[交流] 合成ZnO量子点的问题

第一次合成ZnO量子点,遇到不少问题,请教大家。

参考的文献是Chem. Mater. 2010, 22, 3383–3388。相关合成部分摘录如下:
Synthesis of ZnO Nanoparticles. ZnO nanoparticles were prepared through a precipitation method by using LiOH as the precipitation agent in ethanol. In general, 0.2 mmol of zinc acetate was dissolved in 20 mL of absolute ethanol. The mixture was dissolved completely by being stirred at room temperature for 30 min; 36 mg of LiOH was dissolved in 20 mL of absolute ethanol. The zinc acetate/ethanol solution was then added to
the LiOH/ethanol solution. The pH value of the solution was measured to be 12. After reaction for 2 h, the solution became turbid, indicating ZnO nanoparticles were formed. The pH values of the solutions were tuned to 10, 8, and 6 when 14, 10, and 5.5 mg of LiOH were added, respectively. The obtained ZnO nanoparticles that precipitated at different pH values were first washed using absolute ethanol to remove unreacted precursors, and the washing process was repeated three times. The purified nanoparticles were then dispersed in absolute ethanol for storage.

原料我用的是二水乙酸锌(实验室没有无水乙酸锌),碱用的是NaOH(把LiOH换算成等摩尔量的NaOH。该文献在讨论部分说用NaOH,KOH等也行),其他均按照文献的步骤来做的。
我按照文献上步骤做,NaOH在超声下溶解于乙醇。
问题:
搅拌2小时后没有得到文献所述的“the solution become turbid”的现象。
紫外灯照射下没有发光。
继续搅拌到18小时候,仍没有“the solution become turbid”的现象,紫外灯照射下也没有发光。
加入40ml的正己烷后,也没有沉淀。

请问,问题出在哪里呢?谢谢指点。
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

智能机器人

Robot (super robot)

我们都爱小木虫

找到一些相关的精华帖子,希望有用哦~

科研从小木虫开始,人人为我,我为人人
相关版块跳转 我要订阅楼主 loneox 的主题更新
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 354求调剂 +7 Tyoumou 2026-03-18 10/500 2026-03-22 11:11 by 人来盛
[考研] 269专硕求调剂 +5 金恩贝 2026-03-21 5/250 2026-03-21 22:37 by zhyzzh
[考研] 考研化学学硕调剂,一志愿985 +5 张vvvv 2026-03-15 7/350 2026-03-21 19:23 by ColorlessPI
[考研] 0805 316求调剂 +3 大雪深藏 2026-03-18 3/150 2026-03-21 18:55 by 学员8dgXkO
[考研] 336求调剂 +5 rmc8866 2026-03-21 5/250 2026-03-21 17:24 by 学员8dgXkO
[考研] 268求调剂 +9 简单点0 2026-03-17 9/450 2026-03-21 15:37 by lature00
[考研] 085601调剂 358分 +3 zzzzggh 2026-03-20 4/200 2026-03-21 10:21 by luoyongfeng
[考研] 求调剂 +6 Mqqqqqq 2026-03-19 6/300 2026-03-21 08:04 by JourneyLucky
[考研] 一志愿华中科技大学,080502,354分求调剂 +5 守候夕阳CF 2026-03-18 5/250 2026-03-21 01:06 by JourneyLucky
[考研] 一志愿华南师大 070300(化学)304分求调剂 +3 0703武芊慧雪304 2026-03-18 3/150 2026-03-21 00:48 by JourneyLucky
[考研] 296求调剂 +6 www_q 2026-03-18 10/500 2026-03-20 23:56 by JourneyLucky
[考研] 330求调剂 +4 小材化本科 2026-03-18 4/200 2026-03-20 23:13 by JourneyLucky
[考研] 323求调剂 +3 洼小桶 2026-03-18 3/150 2026-03-20 22:54 by JourneyLucky
[考研] 材料学硕297已过四六级求调剂推荐 +11 adaie 2026-03-19 11/550 2026-03-20 21:30 by laoshidan
[考研] 295材料求调剂,一志愿武汉理工085601专硕 +5 Charlieyq 2026-03-19 5/250 2026-03-20 20:35 by JourneyLucky
[考研] 求调剂 +3 @taotao 2026-03-20 3/150 2026-03-20 19:35 by JourneyLucky
[考研] 一志愿南理工085701环境302求调剂院校 +3 葵梓卫队 2026-03-20 3/150 2026-03-20 19:28 by zhukairuo
[考研] 085601材料工程专硕求调剂 +10 慕寒mio 2026-03-16 10/500 2026-03-19 15:26 by 丁丁*
[考研] 材料考研调剂 +3 xwt。 2026-03-19 3/150 2026-03-19 11:22 by w沐阳w
[考博] 26申博 +4 八6八68 2026-03-16 4/200 2026-03-17 13:00 by 轻松不少随
信息提示
请填处理意见