Gas-phase and liquid-phase purification of plastic waste derived carbon nanotubes: Effect of purification agent and operational parameters

碳纳米管 相(物质) 化学工程 液相 废物管理 材料科学 气相 色谱法 化学 有机化学 纳米技术 工程类 热力学 物理
作者
Chengxin Wang,Wenchao Zhang,Dingding Yao,Qiang Hu,Haiping Yang
出处
期刊:Chemical Engineering Journal [Elsevier]
卷期号:496: 153725-153725
标识
DOI:10.1016/j.cej.2024.153725
摘要

The preparation of carbon nanotubes (CNTs) by catalytic pyrolysis of waste plastics is one of the most promising technologies to realize the harmless and high-value recycling of waste plastics. However, there are limited studies on the purification of waste-derived carbons, which is of significance for downstream applications. In this paper, the effects of different gas-phase purification conditions (temperature, gas type), liquid-phase purification (hydrochloric and nitric acid reflux), and combined gas-liquid purification on the properties of CNTs prepared from waste plastics were investigated. The as-obtained and purified CNTs were characterized using SEM, TEM, TPO, XRD, XPS, Raman spectroscopy, and FTIR spectroscopy. Results showed that operational temperatures have distinct impacts on the properties of CNTs during gas-phase purification. An appropriate temperature range for gas-phase purification was determined, with temperatures around 450 °C for air, 650 °C for CO2, and 700 °C for steam respectively, so that the amorphous carbon could be removed and the graphitization of CNTs was retained. Approximately 93 wt% of the metal catalyst particles could be removed with acid treatment for 4 h. In addition, carboxyl and hydroxyl functional groups were introduced to CNTs after acidic treatment. Furthermore, it was found that the approach combining CO2 treatment and nitric acid washing yielded CNTs with relatively higher quantities and lower defect levels. Results showed the properties of CNTs varied from the purification methods, which could meet different needs based on the downstream specific application requirements.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
w6完成签到,获得积分10
1秒前
jack发布了新的文献求助30
1秒前
wuzhoumeng完成签到,获得积分10
2秒前
金文完成签到 ,获得积分10
2秒前
Re_move完成签到,获得积分10
2秒前
我是老大应助吴帆采纳,获得10
2秒前
GJ完成签到,获得积分10
3秒前
好好学习完成签到,获得积分10
3秒前
沛沛完成签到,获得积分10
3秒前
guangshuang完成签到 ,获得积分10
4秒前
AI完成签到,获得积分10
4秒前
yuzhi完成签到,获得积分10
4秒前
大个应助kobeho24采纳,获得10
4秒前
李半斤完成签到,获得积分10
5秒前
yk1314完成签到,获得积分10
5秒前
山水完成签到,获得积分10
6秒前
舒心雁风完成签到 ,获得积分10
6秒前
18746005898完成签到 ,获得积分10
6秒前
吹风完成签到,获得积分10
6秒前
往昔发布了新的文献求助10
6秒前
besatified发布了新的文献求助10
7秒前
Zero_榊啸号完成签到,获得积分10
7秒前
大月兔完成签到,获得积分10
9秒前
亦犹未进完成签到,获得积分10
9秒前
嗯哼应助吹风采纳,获得20
9秒前
大鲨鱼完成签到 ,获得积分10
11秒前
jack完成签到,获得积分10
11秒前
九月完成签到,获得积分10
11秒前
蕾蕾完成签到,获得积分20
11秒前
13秒前
马家辉完成签到,获得积分10
13秒前
青1995完成签到,获得积分10
13秒前
minino完成签到 ,获得积分10
13秒前
环球创新完成签到,获得积分10
16秒前
苗条的傲丝完成签到,获得积分10
16秒前
seu_liang发布了新的文献求助20
17秒前
华仔应助nasya采纳,获得10
17秒前
多吃一口芝士完成签到 ,获得积分10
17秒前
neoeyes发布了新的文献求助30
18秒前
Owen应助vickyyao采纳,获得10
19秒前
高分求助中
Sustainability in Tides Chemistry 2000
Microlepidoptera Palaearctica, Volumes 1 and 3 - 13 (12-Volume Set) [German] 1122
Дружба 友好报 (1957-1958) 1000
The Data Economy: Tools and Applications 1000
Mantiden - Faszinierende Lauerjäger – Buch gebraucht kaufen 700
PraxisRatgeber Mantiden., faszinierende Lauerjäger. – Buch gebraucht kaufe 700
A Dissection Guide & Atlas to the Rabbit 600
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3099877
求助须知:如何正确求助?哪些是违规求助? 2751333
关于积分的说明 7612942
捐赠科研通 2403282
什么是DOI,文献DOI怎么找? 1275217
科研通“疑难数据库(出版商)”最低求助积分说明 616310
版权声明 599053