24小时热门版块排行榜    

查看: 1866  |  回复: 5

07231210

金虫 (小有名气)

[求助] Improved Synthesis of Graphene Oxide制备氧化石墨烯,急求 已有1人参与

Sample Text
有没有人用Improved Synthesis of Graphene Oxide做过实验啊,需不需要用冰浴加料啊,急急急!万分感谢!
For the improved method, a 9:1 mixture of concentrated H2SO4/H3PO4 (360:40 mL) was added to a mixture of graphite flakes (3.0 g, 1 wt equiv) and KMnO4 (18.0 g, 6 wt equiv), producing a slight exotherm to 35_40 °C. The reaction was then heated
to 50 °C and stirred for 12 h. The reaction was cooled to rt and poured onto ice (_400 mL) with 30% H2O2 (3 mL). For workup, the mixture was sifted through a metal U.S. Standard testing sieve (W.S. Tyler, 300 _m) and then filtered through polyester fiber (Carpenter Co.) The filtrate was centrifuged (4000 rpm for 4 h), and the supernatant was decanted away. The remaining solid material was then washed in succession with 200 mL of water, 200 mL of 30% HCl, and 200 mL of ethanol (2_); for each wash, the mixture was sifted through the U.S. Standard testing sieve and then filtered through polyester fiber with the filtrate being centrifuged (4000 rpm for 4 h) and the supernatant decanted away. The material remaining after this extended,
multiple-wash process was coagulated with 200 mL of ether, and the resulting suspension was filtered over a PTFE membrane with a 0.45 _m pore size. The solid obtained on the filter was vacuum-dried overnight at room temperature, obtaining 5.8 g of product.
回复此楼

» 猜你喜欢

» 本主题相关商家推荐: (我也要在这里推广)

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xiejf

专家顾问 (文学泰斗)

麦麦爸爸爱小牛

【答案】应助回帖

★ ★
感谢参与,应助指数 +1
07231210: 金币+2, 有帮助 2012-09-19 09:30:14
不需要用冰浴,加双氧水前可以加入适量的冰水稀释浓酸。
麦麦爸爸爱小牛
2楼2012-09-18 20:42:56
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

07231210

金虫 (小有名气)

引用回帖:
2楼: Originally posted by xiejf at 2012-09-18 20:42:56
不需要用冰浴,加双氧水前可以加入适量的冰水稀释浓酸。

用这种方法做出来的效果好吗
3楼2012-09-19 08:23:33
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xiejf

专家顾问 (文学泰斗)

麦麦爸爸爱小牛

引用回帖:
3楼: Originally posted by 07231210 at 2012-09-19 08:23:33
用这种方法做出来的效果好吗...

反正我是这么做的
麦麦爸爸爱小牛
4楼2012-09-19 09:03:07
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

mjj1215

金虫 (初入文坛)

楼主加完双氧水之后你是怎么处理的,下面的处理感觉很麻烦,能直接酸洗在水洗处理吗
5楼2012-10-16 16:06:58
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

华莎

新虫 (初入文坛)

【答案】应助回帖

用的这种方法做的,得到了亮黄色的溶液,5000转离心就能差不多,真空干燥后,测XRD,在10左右的衍射峰不强,比硅片的峰高不了多少,是没烘干吗?
6楼2018-11-14 12:51:43
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 07231210 的主题更新
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 323求调剂 +6 洼小桶 2026-03-18 6/300 2026-03-23 00:29 by king123!
[考研] 石河子大学(211、双一流)硕博研究生长期招生公告 +3 李子目 2026-03-22 3/150 2026-03-22 21:01 by 怎么释怀
[考研] 287求调剂 +8 晨昏线与星海 2026-03-19 9/450 2026-03-22 17:01 by i_cooler
[考研] 308求调剂 +3 墨墨漠 2026-03-21 3/150 2026-03-22 16:54 by i_cooler
[考研] 环境学硕288求调剂 +6 皮皮皮123456 2026-03-22 6/300 2026-03-22 16:52 by i_cooler
[考研] 311求调剂 +3 26研0 2026-03-20 3/150 2026-03-22 14:46 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] 材料工程专硕 348分求调剂 +3 冬辞. 2026-03-17 5/250 2026-03-21 18:47 by 学员8dgXkO
[考研] 材料学硕333求调剂 +3 北道巷 2026-03-18 3/150 2026-03-21 18:17 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] 求调剂 +3 .m.. 2026-03-21 4/200 2026-03-21 16:25 by barlinike
[考研] 一志愿南京理工大学085701资源与环境302分求调剂 +4 葵梓卫队 2026-03-18 6/300 2026-03-20 23:02 by JourneyLucky
[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] 081700化工学硕调剂 +3 【1】 2026-03-16 3/150 2026-03-19 23:40 by edmund7
[考研] 085600材料与化工求调剂 +6 绪幸与子 2026-03-17 6/300 2026-03-19 13:27 by houyaoxu
[考研] 344求调剂 +6 knight344 2026-03-16 7/350 2026-03-18 20:13 by walc
[考研] 085601专硕,总分342求调剂,地区不限 +5 share_joy 2026-03-16 5/250 2026-03-18 14:48 by haxia
[考研] 考研求调剂 +3 橘颂. 2026-03-17 4/200 2026-03-17 21:43 by 有只狸奴
[论文投稿] 有没有大佬发小论文能带我个二作 +3 增锐漏人 2026-03-17 4/200 2026-03-17 09:26 by xs74101122
[考研] 070300化学学硕求调剂 +6 太想进步了0608 2026-03-16 6/300 2026-03-16 16:13 by kykm678
信息提示
请填处理意见