JOURNAL OF MOLECULAR LIQUIDS
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2020
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IF 5.065
Lijun You,Ke Xu,Guanjun Ding,Xinming Shi,Jumei Li,Shaoyun Wang,Jiabin Wang
Magnetic covalent organic framework modified by Fe 3 O 4 nanoparticles (Fe 3 O 4 @COF) were facile synthesized and used as adsorbent for the adsorption of bisphenols from aqueous solutions. The Fe 3 O 4 @COF is synthesized by catalyst-free Schiff base reaction of melamine and terephthalaldehyde, and synthesis strategy is flexible and controllable. The as prepared Fe 3 O 4 @COF was characterized by TEM , PXRD , TGA and BET analysis. The Fe 3 O 4 @COF possessed large specific surface area (335.2 m 2 /g), high chemical and thermal stability, and high saturation magnetization (49.6 emu/g), which in favor of rapid magnetic separation and efficient adsorption in the adsorption process. The effects of temperature, adsorbent dosage, pH and salt concentration on the adsorption of bisphenols (BPA and BPAF) were studied. The as-prepared adsorbent showed an excellent adsorption ability for BPA and BPAF , and the max adsorption capacity of BPA and BPAF could reach 140 and 290.4 mg/g. The adsorption kinetic fitted the pseudo-second-order kinetic model and the adsorption isotherm followed the Freundlich isotherm equation. Moreover, the Fe 3 O 4 @COF presented favorable re-use performance, which kept over 81.4% removal efficiency of bisphenols after five consecutive recycles. The high adsorption performance and reusability make the Fe 3 O 4 @COF a promising adsorbent for the removal of bisphenols.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Songlei Lv,Chunxi Li,Jianguo Mi,Hong Meng
In this study, the rice husk-based activated carbon was prepared via pyrolysis of rice husk and simultaneous KOH-activation and EDTA-4Na-modification and used for phenol adsorption from water. When the rice-husk was carbonized at 500 °C and activated at 750 °C with mass ratio of carbon to KOH of 1:3, an activated carbon can be prepared, with rich micro-porosity, high specific area of 2087 m 2 ·g −1 and maximum phenol adsorbance of 194.24 mg·g −1 . When the above activated carbon is prepared by simultaneous KOH-activation and EDTA-4Na-modification at 750 °C, N-containing functional groups were introduced to the activated carbon, which is beneficial to the adsorption of phenol . Under optimum conditions with mass ratio of carbon : KOH : EDTA-4Na = 1:3:1, the specific surface area of the resulting activated carbon decreases to 1368 m 2 ·g −1 , while its maximum adsorption capacity for phenol increases to 215.27 mg·g −1 . The adsorption kinetics of phenol on activated carbon agrees with the pseudo-second-order adsorption model, and the adsorption isotherm follows the Langmuir pattern.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2019
·Vol. 34
·期 4
·787-790
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IF 0.605
Song Xuyan,Li Dan,Li Ran,Chen Yikun,Huang Long,Wei Min,Pan Xi,Zhou Hongshen,Tang Haolin
Ionic liquid modified silica nanoparticles were synthesized using a simple silane chemistry, followed by substitution reaction. The phenol adsorption performance was tested using temperature programmed desorption technique. The experimental results reveal that the introduction of ionic liquids on the surface of silica nanoparticles can improve the adsorption capacity of phenol compared to the pure silica nanoparticles. The initial adsorption capacity reaches 0.312 mmol·g −1 at 25 °C under total pressure of 0.2 bar and it decreases slightly in the following adsorption-desorption cycles. The results demonstrate that introduction of ionic liquids can improve the phenol adsorption capacity and the simple material preparation process is feasible for industrial applications.
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
JOURNAL OF MOLECULAR STRUCTURE
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2020
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IF 2.463
Fazal Haq,Haojie Yu,Yang Wang,Li Wang,Muhammad Haroon,Amin Khan,Sahid Mehmood,Bilal-Ul-Amin,Tengfei Lin
In this study carboxymethyl starch grafted poly(methacrylic acids) (CMS- g -PMAAs) were synthesized by treating carboxymethyl starch with methacrylic acid in the presence of initiator potassium persulfate (KPS). The modified starches were characterized by proton nuclear magnetic resonance ( 1 H NMR) and fourier-transform infrared (FT-IR) spectroscopy. The crystallinity of the modified starches was analyzed by x-ray diffraction (XRD) while thermal properties of the modified starches were found out by thermogravimetric analysis (TGA) and differential thermal analysis (DTG). These modified starches were then tested as an adsorbent for the removal of ammonia and phenol from the gaseous mixture. The maximum adsorption efficiencies of CMS, CMS- g -PMAA1, CMS- g -PMAA2, and CMS- g -PMAA3 for ammonia were 0.005, 0.020, 0.023 and 0.031 g/g respectively. Similarly, for phenol, the maximum adsorption efficiencies of CMS, CMS- g -PMAA1, CMS- g -PMAA2 and CMS- g -PMAA3 were shown to be 0.2085, 0.2445, 0.2473 and 0.2501 g/g respectively. It was shown that CMS- g -PMAAs could be used as an additive in cigarette filters to remove the toxicant ammonia and phenol from cigarette smoke.
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
POLYMER BULLETIN
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2016
·Vol. 73
·期 8
·2321-2341
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IF 1.371
Yang Man,Huang Yun,Cao Haijun,Lin Yuanhua,Cheng Xiaowei,Wang Xia
The organic–inorganic self-doped poly (vinyltrimethoxy silane-ethylene glycol dimethacrylate) (VE resin) was
synthesized by solution polymerization, hydrolysis and dehydration condensation. In this method, ethylene glycol dimethacrylate (EGDMA) was used as cross-linked reagent to form a three-dimensional network structure. Then, the system was prepared by radical polymerization in the presence of the hydrolysis of –OCH 3 and the dehydration condensation of Si–OH. The maximum adsorption capacity 75.68 mg g −1 was achieved when pH was 6, the contact time 60 min, the adsorbent dose 0.1 g, the initial concentration 3000 mg L −1 and the temperature 293 K. The adsorption kinetics followed the pseudo-second-order kinetic model, and the intra-particle diffusion was but not the only rate-limiting step. Adsorption isotherms of phenol were linearly correlated and found to be well represented by the Freundlich model. Thermodynamic parameters such as changes in the enthalpy (Δ H ), free energy (Δ G ) and entropy (Δ S ) indicated that the adsorption process of phenol on VE resin were physical and exothermic. After four regeneration recycles, the adsorption capacity of VE resin remained at 95.04 % of the initial value, which illustrated that it possessed good regeneration capacity.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CARBON
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2016
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IF 6.198
Aibing Chen,Yuetong Li,Yifeng Yu,Yunqian Li,Kechan Xia,Yuying Wang,Shuhui Li,Linsong Zhang
A synthetic procedure to prepare hollow mesoporous carbon spheres (HMCSs) with uniform mesopore size on the shell was developed using the “dissolution-capture” method. The dissolution-capture process was performed in the polystyrene core and silica shell. The polystyrene core template was dissolved by tetrahydrofuran treatment to form a hollow cavity. Then, the polystyrene was entrapped into the mesochannel of the silica shell. After carbonization and etching of silica, HMCSs with uniform mesopore size (4.1 nm) were produced. The HMCSs exhibit a greater capacity for phenol adsorption and reuse, thus making them ideal adsorbents for phenol adsorption.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 98
·期 3
·583-590
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IF 3.709
Junxiu Ye,Gufeng Li,Yao Zhang,Shiju Ji,Min Yang,Lijun Luo,Hongbin Wang,Jiaxiong Li,Guizhen Li
BACKGROUND The adsorption removal of phenol onto bentonite that was prepared by the traditional hydrothermal method has been widely studied; especially, surfactant-modified bentonite has achieved an exclusive position on effective removal to phenol. However, the adsorption performance of the bentonite functionalized by double-carbon chain surfactants in a microwave field for phenol is relatively low. The study on the fabrication of organobentonite by microwave-assistance to remove organic pollutants still needs to be investigated. RESULTS The adsorption performance of bentonite was enhanced after functionalizing with Dihexadecyldimethylammonium Bromide (D1621). FTIR and XRD patterns revealed that D1621 was successfully intercalated into bentonite, and the interval space was increased by 1.54 to 1.84 nm. The optimized preparation condition was obtained at a molar ratio (D1621: Bentonite) of 0.36, solid–liquid ratio (D1621 + Bent: water) of 0.12, microwave mode of Med, and thermal radiation for 6 min based on the indicator of phenol adsorption uptake. An excellent removal rate for phenol was observed at pH 2 to 7 and room temperature in adsorption tests. The adsorption process was spontaneous at room temperature according to thermodynamic parameters, and it agrees with Freundlich ( R 2 = 0.9781) and pseudo-second-order ( R 2 = 0.9999) models, validating a chemisorption process. CONCLUSION The D1621-Bent perpetrated by using the microwave-assisted heating method was proven to be a reliable adsorbent for phenol in water. The adsorption performance of bentonite on phenol was remarkably enhanced after the introduction of organic modifiers. © 2022 Society of Chemical Industry (SCI).
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Physical Chemistry C
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2024
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IF 3.3
Dandan Zhou,Youxi Wang,Dan Wang,Qingqing Wang,Xiaolin Tan,Zhenyu Li,Xiang Shao
The interaction details of phenol with transition metal oxides are important for understanding the mechanisms of organic pollutant degradation as well as functionalization of oxide semiconductors through organic chromophores. In this work, we apply low-temperature scanning tunneling microscopy in combination with density functional theory calculations to explore the adsorption structures and interface charge transfer of phenol on a ZnO(101̅0) surface. Distinct adsorption configurations of phenol are clearly determined. For low coverage conditions, the less-stable standing-up configuration of phenol prevails both at 77 K and room temperature (RT), but all transform into more stable lying-down configurations and assemble into a linear chain structure orientating along the [0001] direction at increased coverage. The lying-down phenols dominate in the two-dimensional structures formed at either RT or 400 K, presenting a c(2 × 2) periodicity at medium coverage or a p(2 × 1) superstructure at saturation coverage. Because different phenol configurations have distinct charging characteristics, their aggregation state hence plays a critical role in switching phenol from electron acceptors to electron donors relative to the ZnO surface. These results are believed to provide important inputs for the deepened understanding of catalytic removal of phenol pollutes as well as for the design of new ZnO–organic functional systems.
研究领域:
材料科学
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表面化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Hui Qiu,Wenxiang Ni,Luyang Yang,Qingrui Zhang
Plant-derived chelators used for heavy metal removal have attracted increasing attention because of their low cost, strong coordination effect, and environmentally benign features. Herein, natural polyphenol-based adsorbents (i.e., TA-Fe 7 and TA-Fe 12 ) were prepared using tannic acid (TA) and ferric ions through simple cross-linking self-assembly reactions with pH 7 and 12, respectively. Adsorption isotherms demonstrated that TA-Fe 12 showed better adsorption ability towards Pb(II) than TA-Fe 7 with a maximum adsorption capacity of 356.1 mg·g −1 at 298 K. Our evaluation of the adsorption affinity indicated that the distribution coefficient K d of TA-Fe 12 for Pb(II) was apparently higher than that of the other cations, revealing the excellent adsorptive selectivity of TA-Fe 12 towards Pb(II). The remarkable adsorption capacity of TA-Fe 12 can be attributed to the strong coordination between Pb(II) and phenolic hydroxyl groups, ester groups of TA as well as the specific adsorption of Pb(II) on the newly formed hydrous ferric oxides (HFO), demonstrated by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR) analysis. Batch cyclic experiments indicated that TA-Fe 12 could be employed for repeated use after 10 adsorption–desorption cycles. Fixed-bed tests indicated that the TA-Fe 12 column could produce clean water with bed volumes of 9500 and 7860 ([Pb] < 1 mg·L −1 ) from synthetic Pb(II)-polluted wastewater and simulated electroplating wastewater, which were significantly higher than those of other commercial adsorbents.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaowen Jiang,Junteng Zhao,Tong Yu,Yijun Li,Xiwen He,Langxing Chen,Yukui Zhang
Covalent organic frameworks (COFs) have attracted increasing interest as adsorbents in water treatment, but the lack of high-performance adsorbents materials and effective morphological structures limits their practical application. In this work, a novel quinoline-linked COFs (COF-QL-Ph) with high crystallinity was synthesized by post-synthetic-modification (PSM). Firstly, the precursor organic ligands of imine-linked COFs were directly electrospinning with polyacrylonitrile (PAN) solution as the seeded nanofibers. Subsequently, the imine-linked COFs formed from 1,3,5-benzenetricarboxaldehyde (TFB) and 2,6-diaminonaphthalene (2,6-DAN) were grown on the seeded PAN nanofibers. Finally, self-supporting imine-linked COFs hollow nanofibers were obtained by etching the polymeric substrates. These were then transformed into quinoline-linked COF-QL-Ph nanofiber through the Povarov reaction between phenylacetylene and the matrix imine-linked COFs. The resulting COF-QL-Ph nanofibers exhibit a developed hollow structure and high porosity for effective adsorption of chlorinated phenols in water. The adsorption behavior of 2,4-dichlorophenol (2,4-DCP) on COF-QL-Ph nanofibers followed the Langmuir model, and the maximum adsorption capacity was 616.9 mg g −1 . The abundant benzene rings and quinoline structures in COF-QL-Ph nanofibers provided a great number of sites for the interaction with 2,4-DCP, which were confirmed by simulation and adsorption characterization. As expected, the self-supporting hollow structure of COF-QL-Ph nanofibers greatly improved the mass transfer rate of adsorbed analytes and accelerated the kinetic process. Furthermore, COF-QL-Ph nanofibers exhibited good structural stability and high recovery performance after six adsorption–desorption cycles. Thus, COF-QL-Ph nanofiber represents a highly promising adsorbent suitable for purifying chlorinated phenols in environmental waters.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
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2018
·
IF 0
Yufeng Bai,Zailin Gong,Chunhua Ge,Lixia Wang,Weifang Han,Xiangdong Zhang
This article reports on the fabrication of hybrid boron nitride (BN) grafted with thermoresponsive poly (N-isopropylacrylamide) (PNIPAM) and their self-flocculation effect caused by the thermal phase transition and entanglement behavior of PNIPAM. Compared with the initial BN, the PNIPAM graft BN (BN-PNIPAM) has larger area, pore volume and self-flocculation effect with rapid response to temperature. After grafting, the effective self-flocculation could be acquired in a wide concentration from 0.01 g/L to 10 g/L, the corresponding removal percentage with the phase transition is higher than 95% at high initial concentration. Furthermore, BN has a significant increase in the absorption of hydroquinone after grafting. Thermoresponsive adsorption and self-coagulation will make BN-PNIPAM recyclable in potential water restorations.
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
产品关联
DOI
JOURNAL OF MOLECULAR STRUCTURE
·
2024
·
IF 4
Senwei Jiang,Hangzhen Lan,Zhen Wu,Daodong Pan,Yichun Wu
This study focuses on the synthesis, characterization, and adsorption performance of a series of UiO-66-based materials for the adsorption of alkylphenols such as bisphenol A (BPA), 4-butylphenol (4-BP), and 4-pentylphenol (PP). The UiO-66 series, including UiO-66-NH 2 –50 %, mesoporous UiO-66 (HCl‑meso-UiO-66), and 4-pentylbenzoic acid-modified 4‑meso-UiO-66, were prepared through a combination of thermal and chemical modifications. Transmission electron microscopy analyses confirmed the successful creation of mesoporous structures, while FT-IR and XPS spectroscopy validated the chemical modifications. The adsorption performance was evaluated through kinetic and isotherm studies, employing pseudo-first-order and pseudo-second-order models as well as Langmuir and Freundlich isotherm models. The results indicated rapid initial adsorption rates, with equilibrium reached within 40 min. The pseudo-second-order model provided the best fit for the kinetic data, while the Freundlich model better described the adsorption behavior for 4-BP and PP, suggesting multilayer adsorption on heterogeneous sites. Thermodynamic studies indicated that 4-BP adsorption is endothermic and non-spontaneous, while BPA and PP adsorption exhibited exothermic and spontaneous characteristics. The study also explored the adsorption mechanisms, highlighting the importance of hydrophobic interactions and size-exclusion effect in the adsorption process. Hydrogen bonding and π-π stacking, although present, was not the primary determinant. The findings underscore the potential of 4‑meso-UiO-66, which exhibited the highest adsorption capacity, particularly for PP, driven by its enhanced pore accessibility, despite a smaller surface area compared to UiO-66-NH 2 –50 %, and hydrophobicity. This work provides valuable insights into the design of efficient adsorbents for alkylphenols enrichment and separation.
研究领域:
环境科学
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材料化学
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吸附技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）