JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Xiao-Han Wang,Bingyou Jiang,Chunshan Zheng,Gaochao Pan,Shiju Wang,Yi Zhang,Ben Ji
The pore and wetting characteristics of bituminous coal and anthracite treated with different proportions of tetrasodium iminodisuccinate (IDS) and sodium dodecyl sulfate (SDS) were measured. The pore structure characteristics of the coal were studied via low-temperature nitrogen adsorption analysis and the Frenkel-Halsey-Hill fractal theory. Zeta potential measurements were conducted to quantitatively analyze the degree of aggregation or dispersion of coal particles dissolved in solution. Changes in the coal surface morphology were observed and analyzed by scanning electron microscopy (SEM). The results show that when the ratio of IDS:SDS is 1:3, the specific surface area (SSA) values of bituminous coal and anthracite are the lowest. The composite reagent has a greater effect on improving the pore structure of anthracite than bituminous coal. Compared with bituminous coal, anthracite has better pore connectivity and a wider pore network. The absolute zeta potentials of bituminous coal and anthracite reach the maximum at an IDS:SDS ratio of 1:3, with values of 91.08 mV and 91.35 mV, respectively. The electrostatic potential distributions of the molecules show that the advantages of the electrostatic potential difference with water molecules enable IDS and SDS molecules to effectively attract water molecules and form hydrogen bonds, thus revealing the optimization mechanism of coal wettability .
研究领域:
矿物学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2020
·
IF 7.888
Chenyuan Guo,Shuguang Shen,Meina Li,Ying Wang,Jing Li,Yuanquan Xing,Cui Wang,Huajie Pan
A rapid and efficient synthesis strategy of MgAl-LDH was proposed. MgAl-LDH with high specific surface area was synthesized in situ by using η -Al 2 O 3 as carrier, and the synthesis time was greatly shortened by both increasing temperature and introducing ethanol as co-solvent. Besides, the growth process of MgAl-LDH on the surface of η -Al 2 O 3 is also revealed. Under optimized conditions, the specific surface area of the MgAl-LDH is as high as 172.4 m 2 /g, the crystalline size is as small as 12.82 nm, and the basicity can reach 1.795 mmol/g. The urea wastewater was degraded from 8000 mg/L to 6.85 mg/L over the catalyst synthesized by the rapid method, and the catalyst still maintains high activity after four uses. Also, it was found that there is a good linear relationship between the urea removal rate and the basicity of MgAl-LDH.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2016
·
IF 1.835
Wei Su,Ai Zhang,Yan Sun,Meng Ran,Xiaojing Wang
Adsorption isotherms of pure C2H4 and C3H6 were measured on 11 adsorbents and at pressures up to 0.8 MPa using a volumetric method. The Brunauer–Emmett–Teller (BET) surface area of the adsorbents had a significant effect on adsorption capacities of both C2H4 and C3H6. The metal organic framework MIL-101 had the highest BET surface area and the highest adsorption capacity. For zeolite molecular sieves 5A, the C2H4 adsorption capacity was higher than that of C3H6, which is opposite to the results for most adsorbents. The isosteric heats of C3H6 on AC-1, 5A, MIL-101, ZIF-8, and SG-1 were higher than those of C2H4. The C3H6/C2H4 separation selectivities were calculated using the ideal solution theory, and the activated carbon AC-1 had the highest separation selectivity of 8.8.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2017
·
IF 2.002
Tian Zhao,Ling Yang,Peiyong Feng,Irina Gruber,Christoph Janiak,Yuejun Liu
MIL-101(Cr), one of the best investigated and widely used metal–organic frameworks, has been easily synthesized with particle diameters in the range from 387(28) nm to 90(10) nm by using acetic acid as a modulator . The particle size of MIL-101(Cr) decreased with increasing acetic acid concentration. The decrease of size in high concentration of acetic acid may be explained with the efficient suppression of the framework extension. In a selected condition, MIL-101(Cr) possessing an average diameter of about 90 nm can be prepared easily and reproducibly in gram-scale, with high BET-surface areas (3200–3500 m 2 /g) and fairly good yield (60–75%).
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2016
·Vol. 23
·期 2
·1325-1334
·
IF 3.195
Chen Mingjie,Zhang Xueqin,Zhang Aiping,Liu Chuanfu,Sun Runcang
Lignocellulosic biomass aerogels with relatively high Brunauer–Emmett–Teller (BET) surface area and pore volume were prepared directly from bagasse solutions in the present study. Bagasse was dissolved in DMSO/LiCl, treated with cyclic freezing-thawing processes, and regenerated with water. The resulted bagasse hydrogels were solvent-exchanged to t-butanol and subjected to freeze-drying to obtain the lignocellulosic aerogels. The structure of the aerogels was studied with FTIR, nitrogen absorption, SEM, and XRD. The results showed that the aerogels had sheet-like skeletons interconnected with one another to form three-dimensional networks. The highest BET surface area and total pore volume of the aerogels were 185 m 2 /g and 0.46 cm 3 /g, respectively. By adjusting the concentration of bagasse solution in DMSO/LiCl, the structure of the aerogels could be controlled to some extent.
研究领域:
材料科学
·
生物质能
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 13
·2072
·
IF 4.329
Xiaoyan Liu,Ruidan Liu,Tianyu Li,Yanqi Liu,Li Liu,Kai Lyu,Surendra P. Shah
Graphene is a two-dimensional sheet of regular hexagonal honeycomb lattice formed by sp2hybrid orbital bonding, with only one layer thickness of a single atom, which is known as the “super king” of the 21st century. Previous studies have shown that cerium oxide-graphene oxide (CeO2-GO(4:1)) nanocomposites eliminated the agglomeration of graphene to some extent and the CeO2-GO(4:1) epoxy coating could be prepared with good anti-corrosion performance. In this paper, CeO2-GO(4:1) nanocomposites were prepared by the hydrothermal synthesis method, and the three-electrode method was used for electrochemical tests. The state evolution of CeO2-GO(4:1)/EP coating and the synergy between CeO2-GO(4:1)/EP and corrosion inhibitor in simulated seawater solution with different concentrations (20%, 40%, 60%) were analyzed and illustrated by Optical Microscope (OM) characterization, Open Circuit Potential (OCP), Electrochemical alternating current Impedance Spectroscopy (EIS), Mott–Schottky curve and Tafel curve. The results indicated that CeO2-GO(4:1) nanocomposites showed good corrosion resistance in a marine environment. This research lays a solid theoretical foundation for the application of cerium oxide-modified graphene oxide anticorrosive coating in marine engineering.Keywords:CeO2-GO;corrosion inhibitor;simulated seawater;corrosion area
研究领域:
材料科学
·
海洋工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Mide Luo,Yali Zhao,Yanying Wei,Haihui Wang
Construction of large-area two-dimensional (2D) nanosheet membranes for gas separation, particularly tubular membranes, is extremely challenging. Here, electrophoretic deposition technology was employed to construct large-area tubular 2D MXene membranes for H 2 /CO 2 gas separation, where the membrane with a single tube area of 25 cm 2 could be successfully manufactured in approximately 5 min under optimal process conditions. The membrane exhibited good H 2 /CO 2 separation performance with H 2 /CO 2 selectivity of 53.0 and hydrogen permeance of 133.8 GPU, exceeding the 2008 Robeson upper bound, and showed excellent stability in long-term test with water vapor evaluations for more than 350 h. Additionally, some engineering issues and operation parameters concerning the separation performance of H 2 /CO 2 in single-module and dual-module separators have been thoroughly investigated and analyzed. This work has taken an important step toward the industrialization of 2D MXene membranes and also provided significant guidance to other 2D material-based membranes in approaching practical applications.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANICA CHIMICA ACTA
·
2019
·
IF 2.433
Zhongbao Liu,Wenqi Gao,Xin Qi,Fengfei Lou,Huiwei Lang
In this article, MIL-101(Cr) powder material was successfully prepared by hydrothermal synthesis and combined with different mass fractions of CaCl 2 by immersion method to obtain MIL-101(Cr)/CaCl 2 composite materials. The physical properties of the adsorbent were determined by X-ray powder diffraction, N 2 adsorption/desorption isotherm, TGA and FTIR. The water vapor adsorption performance of MOFs was tested by a gravimetric instrument to analyze the underlying mechanism. Results indicated that the specific surface area, total pore volume, and pore size distribution of micropores and mesopores of MIL-101(Cr)/CaCl 2 composites decreased with increasing CaCl 2 content. When P/P 0 = 0.9, the water vapor equilibrium adsorption capacities of MIL-101(Cr), MIL-101(Cr)/CaCl 2 -10%, MIL-101(Cr)/CaCl 2 -20%, and MIL-101(Cr)/CaCl 2 -30% were 1.05, 0.88, 1.13, and 1.35 g/g, respectively. MIL-101(Cr)/CaCl 2 -30% agglomerated after water absorption, so MIL-101(Cr)/CaCl 2 -20% was selected as the final experimental material. The water vapor adsorption heat of MIL-101(Cr)/CaCl 2 -20% was 42–58 kJ/mol, which is close to the evaporation enthalpy of water (44 kJ/mol at 25 °C). The analysis of the adsorption kinetics showed the relatively uniform adsorption rate of MIL-101(Cr)/CaCl 2 -20%. Overall, MIL-101(Cr)/CaCl 2 -20% exhibited superior water vapor adsorption performance and have great potential for application to adsorption heat pumps.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lu Cheng,Yabin Sun,Chenhui Ma,Jianshun Feng,Jie Liu,Anhua Liu,Huijuan Yue,Fei Du,Dong Zhang
Selenium is a considerable energy storage material, with presenting a one-step electrochemical reaction in a cheap carbonate-based electrolyte and providing a considerable capacity as a cathode. However, capacity loss and safety issues caused by volume changes during charge and discharge processes, as well as low mass loading, still hinder the practical development of selenium cathodes. Binder is one of the indispensable constitutions of the electrode and crucial for improving the electrochemical performance of the battery. Herein, we design an aqueous robust network binder by doping a trace amount of Fe 3+ ions into sodium alginate for durable lithium/sodium-selenium batteries for the first time. With the modified binder, the capacity of the battery is increased by more than 17% at a current of 0.2C. Furthermore, it can achieve the highest Se loading made by blade coating of up to 12 mg cm −2 , which brings ultra-high reversible areal capacity of 4.9 mAh cm −2 for lithium-selenium battery, and currently the highest reported reversible areal capacity currently of up to 5.6 mAh cm −2 for sodium-selenium battery. Such a well-designed binder can improve the electrochemical performance and areal capacity of selenium cathodes, thereby boosting the practical application of selenium cathodes for energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Changhai Fan,Zhengwang Xia,Haiqian Lian,Luogang Wu,Eryue Song,Jingxian Hua,Li Shen,Rujing Hou,Yichang Pan,Weihong Xing
The ZIF-8 membrane has emerged as a promising candidate for C 3 H 6 /C 3 H 8 separation. However, the feasibility of ZIF-8 membranes for applications has rarely been investigated with gas provided directly by the industry sector. Herein, the C 3 H 6 /C 3 H 8 mixture collected from the backend of the Hydrogen Peroxide to Propylene Oxide (HPPO) process was applied as feed gas to examine the separation performance of tubular ZIF-8 membranes. The membranes exhibited excellent separation performance and long-term stability under 9 bar and 50 °C. Noticeably, upon scaling up to a membrane area of 452.16 cm 2 by connecting six three-channel modules in series (multi-step membrane), its separation performance satisfied the C 3 H 6 circulation requirements during the HPPO process (purity ≥97.5 % and recovery rate ≥85 %). Furthermore, a simulation of membrane operation under industrial working conditions (22 bar and 56.3 °C) was performed. By fixing the separation factor at 15, a minimum membrane area of 800 m 2 met the requirements at the cost of membrane permeance with 120 GPU. The corresponding economic calculation indicated a maximum of 91.8 % annual capital cost saving compared with the distillation process, paving the way for the practical application of membranes.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2020
·Vol. 231
·期 10
·1-18
·
IF 1.9
Liu Huan,Xu Chao,Wei Xueling,Ren Yiming,Tang Dingxing,Zhang Cuige,Zhang Rongli,Li Fang,Huo Chaofei
In this study, activated carbons were prepared from bamboo via carbonization and successive KOH activation by tuning the post-treatment procedure. The resultant carbons possessed high surface area, high oxygen doping, and 3D hierarchical porous structure with interconnected micro-, meso- and macropores. These features resulted in ultra-excellent adsorption capacity for rhodamine B (> 1200 mg/g). Furthermore, the kinetic and isotherm experimental data were best described by pseudo-second kinetic model and Langmuir isotherm model, respectively. The adsorption of RhB onto the as-synthesized carbons was a spontaneous endothermic process. The π–π stacking, hydrogen bond, and acid-base interaction were proposed to account for the adsorption mechanism. Moreover, SiO 2 in bamboo-based carbon functioned as frameworks and its removal via alkali treatment led to the collapse of porous structure, decreasing surface area, pore volume, and O heteroatom doping, consequently dropping the adsorption performance. Overall, bamboo as an abundant and renewable biomass could be considered as a potential precursor for the production of excellent adsorbent for wastewater purification.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2014
·
IF 3.552
Hang Long,Pingxiao Wu,Lin Yang,Zhujian Huang,Nengwu Zhu,Zhixian Hu
Ethylamine modified vermiculite (Ethyl-VER) with high specific surface area and excellent pore structure was prepared to remove cesium from aqueous solution. The physic-chemical properties of the pristine and modified vermiculite were analyzed by X-ray diffraction (XRD), Fourier-transform infrared (FTIR), specific surface area (BET) and scanning electron microscopy/energy disperse spectroscopy (SEM/EDS). The corroding effect of ethylamine increased the specific surface area of vermiculite from 4.35 to 15.59 m 2 g −1 , and the average pore diameter decreased from 6.8 to 5.34 nm. Batch adsorption experiments were conducted as a function of pH, initial Cs + concentration, contact time, coexisting cations (K + , Na + , Ca 2+ ) and low-molecular-weight organic acids (acetic acid, oxalic acid, citric acid) to illustrate the adsorption behavior. The study found that the adsorption capacity of cesium in aqueous solution was improved from 56.92 to 78.17 mg g −1 after modification. The formation of micropores and mesopores and the increased surface area played a critical role in the enhancement of cesium adsorption. Kinetic experiments indicated that the adsorption process can be simulated well with a pseudo-second-order model. The presence of cations or low-molecular-weight organic acids inhibited cesium adsorption in different degrees. On the basis of our results, Ethyl-VER with good surface characteristics and high adsorption capacity is a suitable adsorbent for cesium removal from aqueous solution.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）