Synthesis and characterization of the interpenetrated MOF-5

热重分析 金属有机骨架 扫描电子显微镜 吸附 材料科学 粉末衍射 比表面积 分解 化学工程 核化学 化学 结晶学 物理化学 有机化学 复合材料 催化作用 工程类
作者
Bi Chen,Xiu‐Jian Wang,Qian‐Feng Zhang,Xiaoyong Xi,Jingjing Cai,Qi Huang,Si Shi,Jie Wang,Dan Yuan,Min Fang
出处
期刊:Journal of Materials Chemistry [Royal Society of Chemistry]
卷期号:20 (18): 3758-3758 被引量:176
标识
DOI:10.1039/b922528e
摘要

MOF-5 is an important metal–organic framework and has been intensely studied, especially in its hydrogen storage properties. In this study, we obtained the interpenetrated MOF-5 materials (MOF-5-int) using N,N′-dimethylformamide (DMF) or N,N′-diethylformamide (DEF) as solvents. The Langmuir surface area of MOF-5-int determined by N2 adsorption is 950–1100 m2 g−1, much lower than the non-penetrated MOF-5 (3000 m2 g−1). However, it can store 1.54–1.82 wt% by volumetric method hydrogen at 77 K and 1 atm, which is higher than the amount stored by the non-penetrated MOF-5. The MOF-5-int was also characterized by XRD-powder diffraction, thermogravimetric analysis (TGA), nitrogen adsorption/desorption analysis, scanning electron microscope (SEM) and X-ray single-crystal structure diffraction. In addition, we found grinding greatly facilitates the decomposition of the MOF-5-int material by H2O to a nonporous phase ZnBDC·xH2O (within 2–5 min, BDC = 1,4-benzenedicarboxylate), even under low humidity (30%), which calls for careful handling of the MOF-5 material. The effects of the water content, reaction time, reaction temperature, molar ratio of Zn(NO3)2 to H2BDC, addition of H2O2, rapid stirring and dilution on the synthesis of MOF-5-int were studied and the synthetic conditions were optimized. Moreover, Hafizovic et al. (J. Am. Chem. Soc., 2007, 129, 3612) found the intensity ratio of the powder XRD peak at 9.7° to that at 6.8° (referred to as the R1 value) of MOF-5 can be used to predict its porosity. The lower the intensity ratio, the more porous it is. In this study, we showed that MOF-5-int can have a very low R1 value but also a low porosity. The low specific surface area (SSA) is mainly due to its interpenetrated structure instead of the entrapped zinc species or the mesopores in the material, as previously proposed in the literature, and associated with the characteristic, very strong peak at 13.8° in its XRD-powder diffraction pattern. A high R2 value (the ratio of the intensity of the peak at 13.8° to that at 6.8°) suggests an interpenetrated structure, especially when the R1 value is low. In addition, we found that although entrapped ZnO or solvent molecules can increase the R1 value, and a low R1 value implies no zinc species or solvent molecules entrapped in the MOF-5 framework, a high R1 value does not necessarily suggest the presence of entrapped molecules.
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
PDF的下载单位、IP信息已删除 (2025-6-4)

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
jjjjchou完成签到,获得积分10
1秒前
虚心的不二完成签到 ,获得积分10
3秒前
xuzj应助科研通管家采纳,获得10
4秒前
小马甲应助科研通管家采纳,获得10
4秒前
4秒前
思源应助科研通管家采纳,获得10
4秒前
4秒前
研友_VZG7GZ应助科研通管家采纳,获得10
4秒前
fang应助科研通管家采纳,获得10
4秒前
隐形曼青应助科研通管家采纳,获得10
4秒前
科研通AI5应助科研通管家采纳,获得10
4秒前
FashionBoy应助科研通管家采纳,获得10
4秒前
shiizii应助科研通管家采纳,获得10
4秒前
6秒前
火星上的雨莲完成签到,获得积分10
10秒前
开朗的绮山发布了新的文献求助150
10秒前
平淡远山发布了新的文献求助10
11秒前
热心市民小红花应助Roman采纳,获得10
12秒前
艺术家完成签到 ,获得积分10
13秒前
研友_ngqjz8完成签到,获得积分10
14秒前
LT完成签到 ,获得积分0
15秒前
优秀的dd完成签到 ,获得积分10
16秒前
JamesPei应助八月宁静采纳,获得10
16秒前
www完成签到 ,获得积分10
18秒前
自由如天完成签到,获得积分10
18秒前
轻松白桃给轻松白桃的求助进行了留言
19秒前
热心市民小红花应助Roman采纳,获得10
20秒前
简单的元珊完成签到,获得积分10
21秒前
wanci应助饮汽水采纳,获得10
22秒前
量子星尘发布了新的文献求助10
22秒前
成就映秋完成签到,获得积分10
22秒前
cherrychou完成签到,获得积分10
24秒前
不要引力完成签到,获得积分10
25秒前
26秒前
邵初蓝完成签到,获得积分10
26秒前
沙耶发布了新的文献求助200
27秒前
JOKER完成签到 ,获得积分10
29秒前
泥過完成签到 ,获得积分10
30秒前
张姣姣完成签到,获得积分10
30秒前
OLDBLOW发布了新的文献求助10
30秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 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 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038235
求助须知:如何正确求助?哪些是违规求助? 3575992
关于积分的说明 11374009
捐赠科研通 3305760
什么是DOI,文献DOI怎么找? 1819276
邀请新用户注册赠送积分活动 892662
科研通“疑难数据库(出版商)”最低求助积分说明 815022