ACS Omega
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2020
·
IF 2.87
Jia Wang,Yansong Liu,Xiuyan Guo,Hongqiang Qu,Ran Chang,Jing Ma
Metal–organic frameworks (MOFs) exhibit highly designable properties and have been used in wide applications. To further improve their performance, the modification of MOFs is an effective method. However, the modification process is usually complicated. Besides, the sustainable use of MOFs is difficult to achieve due to the complicated recycling treatment. Herein, we designed a polyethyleneimine (PEI)-modified NH2-MIL-101(Al) composite (PEI@NH2-MIL-101(Al)). This composite showed excellent dye removal performance of methyl orange (MO, 89.4%) and Direct Red 80 (DR80, 99.8%). Remarkably, the dye removal application of PEI@NH2-MIL-101(Al) also acted as a modification process toward flame retardant application. Thus, the dye-adsorbed PEI@NH2-MIL-101(Al) composite (MO-PEI@NH2-MIL-101(Al) and DR80-PEI@NH2-MIL-101(Al)) was sustainably used as an effective flame retardant for an epoxy resin (EP) at low additions (4.0 wt %). The limiting oxygen values of EP/MO-PEI@NH2-MIL-101(Al) and EP/DR80-PEI@NH2-MIL-101(Al) increased to 26.5 and 26.7%, respectively. The heat release and the smoke production of dyes-PEI@NH2-MIL-101(Al)/EP were greatly reduced compared with those of EP. This strategy provides a simple and effective modification method for MOFs. Meanwhile, the modified MOF composite can achieve sustainable application, giving full play to the advantages of MOFs.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2020
·Vol. 36
·期 6
·1272-1278
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IF 1.063
Li Ying,Pan Bo,Miao Hongyan,Xu Humin,Liu Xuefeng,Shi Gang
The present work was mainly focused on the single and binary adsorption of methylene blue(MB) and methyl orange(MO) from alcohol aqueous solution over rice husk based activated carbon(RHAC). The study of single dye adsorption equilibrium experiments found that the Langmuir adsorption model was consistent with the adsorption behavior of RHAC on MB and MO, indicating that it was a single layer adsorption. The adsorption behavior conformed to the pseudo-second-order kinetic model. The binary dye adsorption experiments showed that the Langmuir-Freundlich model could be applied to describe the adsorption behavior of RHAC on MB and MO. Comparation with the single dye system, the adsorption capacity on the binary dye system was larger, and there was “competitive adsorption” and “synergistic adsorption” effects existed. Meanwhile, the pseudo-second-order kinetic model also fit for the binary dye adsorption behavior.
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
ACS Nano
·
2016
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IF 13.334
Yuye Zhang,Zhixin Zhou,Yanfei Shen,Qing Zhou,Jianhai Wang,Anran Liu,Songqin Liu,Yuanjian Zhang
Responsive assembly of 2D materials is of great interest for a range of applications. In this work, interfacial functionalized carbon nitride (CN) nanofibers were synthesized by hydrolyzing bulk CN in sodium hydroxide solution. The reversible assemble and disassemble behavior of the as-prepared CN nanofibers was investigated by using CO2 as a trigger to form a hydrogel network at first. Compared to the most widespread absorbent materials such as active carbon, graphene and previously reported supramolecular gel, the proposed CN hydrogel not only exhibited a competitive absorbing capacity (maximum absorbing capacity of methylene blue up to 402 mg/g) but also overcame the typical deficiencies such as poor selectivity and high energy-consuming regeneration. This work would provide a strategy to construct a 3D CN network and open an avenue for developing smart assembly for potential applications ranging from environment to selective extraction.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 69
·56279-56285
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IF 3.84
Wei Wang,Tifeng Jiao,Qingrui Zhang,Xiaona Luo,Jie Hu,Yan Chen,Qiuming Peng,Xuehai Yan,Bingbing Li
In this work, hierarchical core–shell manganese oxide nanocomposites (Fe3O4@MnO2 and Fe2O3@MnO2) were synthesized via a facile hydrothermal process without using any templates or organic surfactants. The effect of reaction time on the microstructure and morphology of composite samples was systemically investigated. The formation mechanism of the core–shell structure was carefully analyzed by using field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET) surface area measurement. Both nitrogen adsorption–desorption experiments and morphological study showed that the composite obtained through 6 hour hydrothermal reaction has fairly large specific surface area, uniform pore-size distribution, and good adsorption capability. The dye adsorption experiments further demonstrated the potential applications of the manganese oxide nanocomposites as efficient dye adsorbents for wastewater treatment.
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 Sustainable Chemistry & Engineering
·
2017
·
IF 5.951
Ruirui Xing,Wei Wang,Tifeng Jiao,Kai Ma,Qingrui Zhang,Wei Hong,Hui Qiu,Jingxin Zhou,Lexin Zhang,Qiuming Peng
New hierarchical bioinspired nanocomposite materials of poly(vinyl alcohol)/poly(acrylic acid)/carboxylate graphene oxide nanosheet@polydopamine (PVA/PAA/GO-COOH@PDA) were successfully prepared by electrospinning technique, thermal treatment, and polydopamine modification. The obtained composite membranes are composed of polymeric nanofibers with carboxylate graphene oxide nanosheets, which are anchored on the fibers by heat-induced cross-linking reaction. The preparation process demonstrate eco-friendly and controllable manner. These as-formed nanocomposites were characterized by various morphological methods and spectral techniques. Due to the unique polydopamine and graphene oxide containing structures in composites, the as-obtained composite demonstrate well efficient adsorption capacity toward dye removal, which is primarily due to the specific surface area of electrospun membranes and the active polydopamine/graphene oxide components. In addition, the composite membranes reported here are easy to regenerate. In comparison with other composite adsorbents, the preparation process of present new composite materials is highly eco-friendly and facile to operate and regulate, which demonstrates potential large-scale applications in wastewater treatment and dye removal.
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
CHEMICAL ENGINEERING JOURNAL
·
2018
·
IF 6.735
Yong Gao,Shu-Qi Deng,Xia Jin,Song-Liang Cai,Sheng-Run Zheng,Wei-Guang Zhang
For the first time, an amorphous solid contains large cationic M 12 L 24 metal–organic cage (MOC) based on Pd(II) and 3,5-di-pyridin-4-yl-benzaldehyde ( L ), namely a MOC-1 , was constructed and characterized. Although it is an amorphous structure, regular cavity that created by MOC still exists in the solid and performs excellent dye adsorption and separation ability in water. The a MOC-1 can rapidly adsorb the anionic dyes including methyl orange (MO), fluorescein disodium salt (FS), acid fuchsin (AF) and methyl blue (MB) only in several minutes to about 30 min. The adsorption capacities for them are 359, 464, 116 and 150 mg/g, respectively. On the contrary, the adsorption rate of a MOC-1 towards cationic dyes is significantly slower than that of anionic dyes. The adsorption of cationic dyes shows a size-selectively behavior, in which the adsorption of rhodamine B (RhB) is more favorable than the other selected smaller or bigger cationic dyes. The adsorption capacity of RhB is up to 454 mg/g. According to the differences in the adsorption rates and capacities for different charged dyes, a MOC-1 displays diverse dye separation behaviors. It can selectively adsorb RhB from a mixed solution of MLB and RhB by size selectivity. Moreover, the selective separation of anionic and cationic dyes shows an interesting new time-dependence mode that the anionic dye can be selectively adsorbed from a mixed solution of anionic and cationic dyes by controlling the adsorption time. The good adsorption and separation performance of a MOC-1 is caused by the large cavity and the high positive Zeta potential of the material, which are created by the Pd 12 L 24 metal-organic cages.
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
NANO
·
2015
·
IF 1.09
Hongbin Chen,Wangmiao Fu,Xiang Yu,Yi Zhu,Hui Meng,Jinpeng Tang,Yuanming Zhang
A facile one-step method was developed for the first time to fabricate BiOCl film on Cu substrate by simply dipping the Cu substrate in the mixed solution containing HCl, glycol, H 2 O 2 and BiCl 3 . This method shows the advantages of a simple technique, uniform and controllable morphology, as well as easy mass production. The absorption capacity of BiOCl film was investigated by adsorption of Rhodamine B and Congo red (CR) and their maximum adsorption capacities were 1667 mg g − 1 and 1429 mg g − 1 , respectively. The negative values of free energy and the positive values of enthalpy suggested that the adsorption were spontaneous and endothermic, respectively. Moreover, both adsorptions were matched with the pseudo-second-order equation. This film could be reused and the recycle rates for Rhodamine B and CR were still about 95% and 75% after five cycles, respectively. The adsorption mechanism revealed that hydrogen bond mainly accounted for the adsorption of dyes.
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 ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Shuhui Wei,Ali Reza Kamali
A mesoporous carbon nanostructure (MCN) with embedded Co 3 Fe 7 /CoFe 2 O 4 magnetic nanoparticles is synthesized by a clean and low-cost ball-milling/molten salt processing approach, employing metal oxides and waste plastic materials, without the involvement of environmentally-problematic raw materials or products. The structure, morphology and magnetic properties of MCN are analyzed by a variety of techniques. A systematic investigation is conducted to evaluate the performance of this nanostructured material as regenerable adsorbent for the efficient removal of methyl orange (MO) and methylene blue (MB) dyes from their aqueous solutions at various conditions, in terms of the dye concentration, the adsorbent dosage and the pH level of the solution. The dye adsorption of MCN is in accordance with the pseudo-second-order kinetic model and the Langmuir isothermal model with an excellent monolayer adsorption capacity of 278 and 238 mg/g for MB and MO, respectively. Moreover, the material is characterized to be ferromagnetic with the Ms value of 17.9 emu/g, ensuring the facile separation of the exhausted adsorbent from the treated water. The adsorption performance of MCN can be regenerated, with an adsorption capacity of greater than 95% of the original performance, after five successive regeneration cycles.
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
NANOTECHNOLOGY
·
2016
·Vol. 27
·期 24
·245703
·
IF 3.573
Yulong Ying,Peng He,Guqiao Ding,Xinsheng Peng
Graphene modified by graphene quantum dots (GQDs) has been employed to remove toxic organic dyes. An excellent removal capacity (497 mg g−1) and record-breaking adsorption rate (475 mg g−1 min−1 at 20 °C) were demonstrated for Rhodamine B. The enhancement in performance by nearly a factor of three compared to that of graphene was ascribed to the greatly increased accessible surface area of graphene in aqueous solution as well as the increase in surface charges with the modification with GQDs. Besides, this unique adsorption behavior of the modified graphene was expanded to other typical toxic aqueous aromatic dyes such as Evans Blue, Methyl Orange, Malachite Green and Rose Bengal. What is more, a unique desorption behavior of dyes was first observed when employing different solvents, which enabled the GQD-modified graphene to be exploited for selective extraction of dyes and recycling of the adsorbent. The adsorption and desorption mechanism were further investigated. Combining high removal capacity, rapid adsorption kinetics, good recyclability and unique selective desorption, GQD-modified graphene has potential applications in both water purification and separation of aromatic dyes.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Polymers
·
2017
·Vol. 9
·期 9
·455
·
IF 3.364
Wei Wang,Qian Bai,Tao Liang,Huiyu Bai,Xiaoya Liu
Porous regenerated cellulose (RC) membranes were prepared with cotton linter pulp as a raw material. These membranes were first oxidized on both sides by a modified (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) oxidation system using a controlled oxidation reaction technique. Then, the oxidized RC membranes were functionalized with polyethylenimine (PEI) via the glutaraldehyde crosslinking method to obtain bifunctional (carboxyl and amino) porous RC membranes, as revealed by Fourier transform infrared spectroscopy (FT-IR), elemental analysis and zeta potential measurement. The scanning electron microscopy (SEM) and the tests of the mechanical properties and permeability characteristics of modified RC membranes demonstrated that the porous structure and certain mechanical properties could be retained. The adsorption performance of the modified membranes towards dyes was subsequently investigated. The modified membranes displayed good adsorption capacities, rapid adsorption equilibrium and removal efficiencies towards both anionic (xylenol orange (XO)) and cationic (methylene blue (MB)) dyes, making them suitable bioadsorbents for wastewater treatment.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2010
·Vol. 35
·期 2
·360-368
·
IF 3.006
Xu Fang,Shili Xiao,Mingwu Shen,Rui Guo,Shanyuan Wang,Xiangyang Shi
We report the fabrication of water-stable electrospun polyethyleneimine (PEI)/polyvinyl alcohol (PVA) nanofibers that have super dye sorption capability. Electrospinning parameters including flow rate, applied voltage, and polymer concentration were optimized to obtain smooth and uniform PEI/PVA nanofibers. The nanofibers with a mean diameter of 490 ± 83 nm can be rendered water insoluble via crosslinking using glutaraldehyde vapor. The formed nanofibers with a smooth and uniform morphology before and after crosslinking were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy, and mechanical property testing. The sorption capability of the PEI/PVA nanofibers was confirmed by UV-vis spectrometry. We show that the water-stable nanofibrous mats can effectively absorb methyl blue, which is a typical dye used in the printing and dyeing industry. The dye sorption kinetics and isotherm follow the pseudo-second-order model and the Langmuir model, respectively. The developed polymer nanofiber system has a great potential in decolorizing dyeing wastewater for environmental remediation applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 98
·95656-95662
·
IF 3.289
Peipei Sun,Kaitao Zhang,Shibin Shang,Jie Song,Dan Wang
Hydrothermal carbonization (HTC) is an effective and sustainable way to covert biomass into functional carbonaceous materials. Effects of condition parameters on the morphology and particle size distributions were evaluated. However, the absence of porosity of HTC materials limits their wide applications. Activation of HTC materials could solve this problem. Traditional activation methods, which use strong base or acid as activating agent, could lead to pollutions. Here, we prepared microporous activated carbon spheres from ethyl cellulose under static air atmosphere. The resultant activated carbon spheres were characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), FT-IR spectrometer, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and nitrogen adsorption. Results reveal that the obtained carbon spheres show smooth surface, good dispersion and abundant surface functional groups. In addition, the spherical carbon exhibits high adsorption abilities for different kinds of dyes, which is important for environment protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）