CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shiyu Hou,Yiliang Tang,Tianle Zhu,Zheng-Hong Huang,Yingshu Liu,Ye Sun,Xiang Li,Fangxia Shen
In order to ensure regeneration property of adsorption materials in the air pollution purification system of the airtight cabin, such as submarine and space station, it is necessary to selectively separate semi-volatile organic compounds whose desorption is difficult. For this reason, the effects of pore size on the adsorption capacity and adsorption selectivity of toluene and naphthalene were investigated by both molecular simulation and experimental investigation. The ordered porous silica-based adsorbents with pore sizes ranging from 1.0 nm to 2.8 nm were constructed by simulation and were prepared by template synthesis method in this study. Both simulation and experiment show that the adsorption capacity of toluene and naphthalene firstly increased and then decreased with the increase of the pore size of adsorbents from 1.0 nm to 2.8 nm, and the pore diameter (1.3 nm) corresponding to the maximum adsorption amount of toluene was smaller than that (2.3 nm) of naphthalene. Simulation results show that the adsorption energy and adsorption stability of naphthalene are higher than those of toluene, and binary-component co-adsorption experiments also testified that toluene molecules could be replaced by naphthalene molecules. The optimum pore size for selective adsorption of naphthalene is 2.3 nm.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Jingyun Qian,Wenna Zhang,Xue Yang,Kexin Yan,Meikun Shen,Hongyue Pan,Hongjun Zhu,Lei Wang
Constructing the metal cation-mediated low-cost inorganic sorbent with high separation efficiency in CO 2 , N 2 , and CH 4 remains a major challenge. Herein, we developed a series of alkali metal cations (Na + , K + , Rb + , Cs + )-exchanged ERI zeolites and adopted in the separation process of CO 2 among the gas mixture. Among the ion-exchanged zeolites, the zeolite K-ERI showed a high adsorption volume of 70.84 cm 3 g −1 and an IAST selectivity of CO 2 /CH 4 : 6254, CO 2 /N 2 : 2872 at 298 K, respectively, far outweighed the reported metal cation exchanged zeolites. Combining powder X-ray diffraction crystallography and density functional theory calculations, we unequivocally unveiled that the metal cations located at s 8 r effectively tailored zeolite aperture, and metal cation-gas molecules interactions synergically restrained the pass-through capacity of CO 2 in ion-exchanged ERI framework. Such a unique host–guest interaction governed by metal cations in aluminosilicate zeolite ERI affords a general strategy for gas separation.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
DOI
高影响因子
CHEMOSPHERE
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2021
·
IF 7.086
Dongxue Liu,Ye Li,Chang Liu,Yuzhi Zhou
A nanocomposite of a zirconium-based metal-organic framework (UiO-66) @ polypyrrole (PPy) (UiO-66@PPy) was successfully synthesized to eliminate F − from groundwater. The optimum initial pH and adsorbent dose for maximum uptake of F − from aqueous solution were found to be 3.0 and 0.1 g/L, respectively. The fluoride removal performance of UiO-66 was greatly enhanced through the introduction of polypyrrole guests, and the maximum adsorption capacity of UiO-66@PPy, namely, 290.7 mg/g, was reached, which is far superior to those of other previously reported adsorbents. The fluoride adsorption by UiO-66@PPy agreed well with the pseudo-second-order equation model and Langmuir isotherm model. The coexisting PO 4 3− and CO 3 2− substantially influence fluoride removal. The synthesized UiO-66@PPy could be reused five times in adsorption-desorption cycles. The incorporation of conducting polymers opened additional paths for the development of adsorbent materials; thus, UiO-66@PPy could be a viable adsorbent material and contribute to fluoride removal from groundwater.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jin Wu,Yunlong Chen,Xianzhi Hu,Futing Zi,Yue Lin,Yufang Li
Developing an efficient and cleaner technology to recover gold (III) from aqueous media is vital for both economic and environmental perspectives. Herein, Cu 2 S was first found with well Au (III) recovery ability. Rod and flower-like Cu 2 S nanoparticles prepared by dynamic modulation, with jaggy micro-surface and relatively hard-wearing shape, was found with well Au (III) affinity. Results proved that this adsorbent could work better over a relatively wide pH from 2 to 5, and temperature from 25 to 55 °C, and that attained high gold capacity of 5,582 mg/g which obviously exceeded other reported adsorbents, indicating well application potential. XRD, TEM, and XPS studies demonstrated that adsorbed Au (III) was reduced as Au (0) by Cu 2 S. DFT studies verified that Au (III) recovery is related with the formation of “Cu-S-Au” bridge-like linkage and the unceasingly produced new adsorption sites after adsorbed Au atom’s migration and agglomeration. Au (III) recovery ability and selectivity in the actual sample was proved to be well too. Also, more than 90% gold on Cu 2 S could be recovered with HNO 3 . This study is of great theoretical and practical significance for cleaner Au (III) recovery from various aqueous media.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Runan Zhang,Xiao Gu,Yihan Liu,Di Hua,Meng Shao,Zhida Gu,Jiansheng Wu,Bing Zheng,Weina Zhang,Sheng Li,Fengwei Huo,Wei Huang
The design and preparation of electrode material with advanced desalination properties are key factors to the capacitive deionization (CDI) technique. Herein, a nitrogen (N) doped porous carbon has been successfully fabricated using whipped egg foam as precursor. It possesses a unique micro-mesopore structure with ultra-high specific surface area of 3277.96 m 2 g −1 , and abundant active adsorption sites from the surface doping. These features could not only provide hydrophilic property, but also good electronic/ions conductivities during the deionization processes, facilitating the pseudo-capacitance and total CDI performance. As a result, the obtained electrode material could deliver a high salt adsorption capacity of 26.67 mg g −1 and fast salt adsorption rate in 500 mg L −1 NaCl solution at an applied voltage of 1.2 V, which could be considered a feasible electrode material for CDI.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
Journal of Nanotechnology
·
2018
·
IF 0
Hui-qiang Wang,Ming-hua Liu,Xin Luo,Yi-fan Liu,Fei-er Chen,Yuan-cai Lv
ZnFe2O4/AC composites were prepared by the one-pot hydrothermal method using the activated carbon (AC) as a carrier. The synthesis conditions were optimized by a single-factor experiment. The structural, textural, and surface properties of the adsorbent have been comprehensively characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared (FT-IR) spectroscopy, Brunauer–Emmett–Teller (BET) measurements, and X-ray photoelectron spectroscopy (XPS) analysis. The SO2 removal capacities of the composites were investigated via testing the adsorption capacity at the self-made desulfurization equipment. The results show that the adsorption capacity of ZnFe2O4/AC composites is much higher than that of the AC and ZnFe2O4 samples, respectively. The composite overcomes the disadvantages of the traditional sintering, showing a very high desulfurization performance. The breakthrough time was 147 min, and the sulfur adsorption capacity could reach 23.67% in the desulfurization performance test.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
CELLULOSE
·
2021
·Vol. 28
·期 9
·5241-5256
·
IF 5.044
Zhou Qian,Chen JunJie,Jin Bo,Chu Shijin,Peng Rufang
MOFs are confined to solid supports to overcome their inherent disadvantages of lightweight and submicron size, which pose challenges to the adsorption operation. ZIF-8 nanoparticles can be loaded onto bacterial cellulose (BC) in a simple manner, and subsequently carbonized at 700 °C to obtain a larger specific surface area (expressed as BC@ZIF-8 carbon aerogels (BZCA). SEM indicates that ZIF-8 was successfully self-assembled on bacterial cellulose. Various characterization techniques (SEM, TEM, FT-IR, XRD, BET, and XPS) indicated that BZCA had been successfully prepared, with a large specific surface area (220.45 m 2 /g) and sufficient functional groups (-NH-, -OH, Zn–O, N–O, and C = N-). The relationship of the adsorption of BZCA to UO 2 2+ with both contact time and initial concentration was then studied. Results showed that the adsorption of UO 2 2+ followed a pseudo-second-order kinetic model (R 2 = 0.999). After calculation, the maximum adsorption capacity of BZCA was 535 mg/g, which was comparable to or better than that of other adsorbents. The kinetic analysis disclosed that 70 min was enough for BZCA to reach the adsorption equilibrium. The adsorption mechanism of the prepared adsorbent on UO 2 2+ was studied by FTIR and XPS.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2016
·Vol. 310
·期 3
·1001-1011
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IF 0.983
Xiao Jiang,Jing Yan,Yao Ying,Xie Shaolei,Wang Xingquan,Shi Chenglong,Jia Yongzhong
Herein, the amine-functionalized MCM-41 mesoporous silica (denoted as MCM-41-NH 2 ) was synthesized and applied to adsorption and recovery U(VI) ions from aqueous solutions. The results showed that the sorption of U(VI) on MCM-41-NH 2 was strongly dependent on pH and ionic strength. The sorption was mainly dominated by outer-sphere surface complexation and the sorption equilibrium can be reached within 60 min. The maximum sorption capacity of MCM-41-NH 2 for U(VI) was calculated to be 386.98 mg g −1 at pH 5.60, much higher than that of the other reported materials.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2013
·
IF 3.365
Xudong Zhao,Dahuan Liu,Hongliang Huang,Wenjuan Zhang,Qingyuan Yang,Chongli Zhong
The stability of metal–organic frameworks (MOFs) in fluoride solutions was studied based on 11 water-stable MOFs (MIL-53(Fe, Cr, Al), MIL-68(Al), CAU-1, CAU-6, UiO-66(Zr, Hf) and ZIFs-7, -8, -9), and several factors were found to have large influence, such as the central metal activity, pore topology and coordination number. Furthermore, the defluoridation performance of UiO-66(Zr) was investigated comprehensively, which shows an adsorption capacity of 41.36 mg g −1 that is higher than most of the reported adsorbents. The initial pH of fluoride solution has little effect in neutral range, while shows a negative effect when pH >9.0; the adsorption data of UiO-66(Zr) fit well with the Langmuir model, and pseudo-second-order kinetic model was found to be suitable for depicting the F − adsorption process, and finally, it was observed that the extent of the effect of co-existing ions is largely ion-dependent. On the basis of the systemic study, this work suggests that increasing the number of –OH groups is an efficient strategy to improve the defluoridation performance of MOFs, and MOFs are promising adsorbents for defluoridation in waste water.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Yi Tan,Kaili Wang,Qian Yan,Shifeng Zhang,Jianzhang Li,Yong Ji
An innovative wood flour-based adsorbent for Pb(II) removal was synthesized via a cost-effective and environment-friendly method, which could be high on the priority list owing to its high absorption capacity. By increasing the specific surface and introducing functional groups through delignification and amination, the experimental adsorption capacity of the prepared adsorbent could reach 189.9 mg/g in 180 min (pH = 4, T = 293 K, dosage = 1 g/L, and ion concentration = 300 mg/L). This value is higher than most of those achieved in previous studies on wood-based adsorbents. Pseudo-second-order and Langmuir models were utilized to describe the adsorption kinetics and isotherms, respectively. The effects of solution pH, adsorbent dosage, and temperature on the adsorption efficiency were also evaluated. With a low decrease rate of 20.2% in five cycles, the adsorbent possessed reusability. The adsorbents exhibited high selectivity in the Pb(II), Cu(II), and Zn(II) mixed solution, and the selectivity coefficient k of adsorbents to Pb(II) could reach approximately 2.74 in triad. The method could prompt the development of cost-effective methods for the removal of heavy metals from wastewater.
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
JOURNAL OF POROUS MATERIALS
·
2015
·Vol. 22
·期 5
·1195-1203
·
IF 1.108
Wu Qigang,Xu Rong,Li Jing,Zhang Qi,Zhong Jing,Huang Weiqiu,Gu Xuehong
The compact ZIF-69 membranes have been prepared by seeded growth method for the recovery of gasoline vapor which is a major challenge in the petrochemical industry. The membrane performances for separating N 2 /n-alkane mixtures at various operating conditions (e.g. trans-membrane pressure difference, operating temperature, feed concentration, and stage cut) were systematically investigated. The highest separation factor was 2.60 with the corresponding permeance of 5.02 × 10 −8 mol/(m 2 s Pa) for the N 2 /n-C 6 H 14 model mixtures. Moreover, the effects of n-alkane components (n-C 5 H 12 , n-C 6 H 14 , and n-C 7 H 16 ) on the separation performances were studied, and the separation factors followed α (N 2 /n-C 7 H 16 ) > α (N 2 /n-C 6 H 14 ) > α (N 2 /n-C 5 H 12 ), due to the different adsorption capacities of n-alkanes on ZIF-69 materials. The present work demonstrates that the ZIF-69 membrane is a highly promising candidate for the application in gasoline vapor recovery.
研究领域:
材料科学
·
化学工程
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
·
IF 6.14
Yufang Wu,Yiwei Sun,Jing Xiao,Xun Wang,Zhong Li
In this work, a novel Gly@HKUST-1 with simultaneously enhanced moisture stability and improved adsorption capacity was developed by grafting glycine (Gly) onto the open metal sites of HKUST-1, in order to recover light hydrocarbons from natural gas efficiently. The resultant Gly@HKUST-1 had higher C2H6 and C3H8 adsorption capacities compared to HKUST-1 and some other metal–organic frameworks, which reached as high as 6.47 and 7.80 mmol/g at ambient conditions. Its C2H6/CH4 and C3H8/CH4 adsorption selectivities were up to 12.6 and 173.5, respectively. Fixed-bed experiments showed that 0.3Gly@HKUST-1 could separate the CH4/C2H6/C3H8 mixtures completely at ambient conditions, showing excellent separation property toward the light hydrocarbons. More importantly, stability experiments confirmed that after the two samples were exposed to moist air (RH of 55%) for 20 days, 0.3Gly@HKUST-1 still remained its crystal structure, while parent HKUST-1 lost most of its crystallinity. Computational simulations showed that Gly grafting onto unsaturated Cu site played a critical role in enhancing stability against water vapor and improving capacity due to its shielding of unsaturated Cu site as well as introduction of −COOH or −NH2 as the H-binding sites. Gly@HKUST-1 is promising for practical application of efficiently recovering ethane and propane from natural gas by adsorption.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）