JOURNAL OF CHROMATOGRAPHY A
·
2021
·
IF 4.759
Jinqiu Li,Bin Zhao,Liying Guo,Zhuo Wang,Chun Wang,Zhi Wang,Shuaihua Zhang,Qiuhua Wu
Three novel hypercrosslinked polymers (HCPs) were synthesized via Friedel-Crafts reaction employing 1,3,5-tris(bromomethyl)-2,4,6-trimethylbenzene as alkylating agent, and triphenylbenzene, tetraphenylethylene and p -quaterphenyl as the aromatic units, respectively. The prepared HCPs were applied as solid-phase microextraction coatings for direct immersion extraction of polycyclic aromatic hydrocarbons (PAHs) and their oxygenated and nitrated derivatives in environmental water samples. The key factors affecting the extraction efficiency including extraction time, extraction temperature, stirring rate, ionic strength and desorption conditions, were carefully studied. Coupled with gas chromatography mass spectrometry analysis, a new method for determining PAHs and their derivatives was developed. Under the optimized conditions, the limits of detection ( S/N =3) and limits of quantitation (the lowest concentration for quantification) of the method were in the range of 2.5-25.0 and 7.5-75.0 ng L −1 , respectively. The recoveries of spiked samples were in the range of 73.1-118.3% with relative standard deviations less than 13.0%. The developed method was applied for the simultaneous determination of nine PAHs and their derivatives in environmental water samples, showing good accuracy and reliability.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2020
·
IF 5.065
Lin Yao,Lili Zhang,Bingwen Long,Yafen Dai,Yigang Ding
Three inexpensive N-heterocyclic hyper-cross-linked polymers (HCP-IN, HCP-BZD, and HCP-BTA) were successfully prepared by Friedel−Crafts reaction for the removal of organic pollutants from aqueous solution. Five organic pollutants, i.e., 1-naphthol (1-NO), 4-nitrophenol (4-NP), 4-chlorophenol (4-CP), 2,4-dimethylphenol (2,4-DMP), and phenol were selected. Because of high specific surface area (1023 m 2 /g), micropore specific surface area (622 m 2 /g), and good wetting ability, HCP-BTA showed ultra-fast adsorption. Its adsorption capacity can reach up to 490.9 mg/g for 1-NO, 363.2 mg/g for 4-NP, 345.8 mg/g for 4-CP, 310.4 mg/g for 2,4-DMP, and 18,130.9 mg/g for phenol, within 1 min. The process was exothermic, and Δ H had an order of 1-NO (−116.23 kJ/mol) > 2,4-DMP (−89.26 kJ/mol) > 4-NP (−59.74 kJ/mol) > 4-CP (−41.12 kJ/mol) > phenol (−18.61 kJ/mol). The adsorption mechanism was explored as well. Hydrogen bonding , π–π stacking, and hydrophobic interaction might be the significant interactions for the adsorption. Besides, HCP-BTA can be easily regenerated, and the capacity after five cycles still remained 90% of the first adsorption. Above all, the N-heterocyclic hyper-cross-linked polymers may be the promising candidate for the removal of organic pollutants from aqueous solution.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 17
·12987-12993
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IF 3.84
Yue Wu,Liguo Li,Wenyan Yang,Shengyu Feng,Hongzhi Liu
A series of hybrid nanoporous polystyrenes were synthesized from commercial polystyrene (PS) and cubic octavinylsilsesquioxane (OVS) via the Friedel–Crafts reaction. The porosity of the resulting hybrid polymers could be fine-tuned by varying the ratio of PS and OVS. The resulting polymers, HCP-1 to HCP-9 had apparent Brunauer–Emmett–Teller surface areas (SBET) in a range of 2.6 to 767 m2 g−1, with total pore volumes in the range of 0.36 to 0.90 cm3 g−1. The SBET was maximum when OVS loading was 9.1 wt%; it then decreased to almost no porosity before increasing again with the increase of OVS loading. The thermal decomposition temperatures of the hybrid polymers were close to pure PS under a N2 atmosphere, but the residues increased with the increase of OVS loading. The gas sorption applications revealed that HCP-3 possessed H2 uptake of 3.01 mmol g−1 (0.60 wt%) at 77 K and 1.01 bar and CO2 uptake of 1.12 mmol g−1 (4.93 wt%) at 298 K and 1.01 bar.
研究领域:
材料科学
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高分子化学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2019
·
IF 3.621
Ruidong Liu,Zhizhou Yang,Shiwei Chen,Jinshui Yao,Qiuhong Mu,Dan Peng,Hui Zhao
A novel hyper-cross-linked porous polymer based on hexaphenyldisiloxane (HCP-DH) is synthesized through Friedel−Crafts reaction. The surface area of HCP-DH is up to 1084 m 2 g −1 , and it exhibits excellent adsorption capacities and reusability in organic dyes removal from water. Additionally, the structure of the synthesized polymer can be adjusted by alkali treatment, forming Si OH groups in the pore structures. The porous polymer can be modified by the reaction of Si OH groups and (3-aminopropyl)methyldiethoxysilane easily, and the amino functionalized porous polymer displays a good property in the field of chromium ion adsorption with an adsorption amount of 44.5 mg g −1 under neutral condition. This method provides a new strategy for the synthesis and functionalization of porous polymers.
研究领域:
材料科学
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环境工程
·
水处理
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xiaoying Feng,Yixin Kuang,Suxin Zhou,Juan Zheng,Gangfeng Ouyang
The substitution position of functional group is potential to affect the microstructure and adsorption performance of functionalized polystyrene (PS) nanospheres, yet to be explored. In this study, a series of hyper-crosslinked PS nanospheres with isomeric chlorine substitution have been prepared by emulsion polymerization and Friedel-Crafts reaction. The detailed characterizations indicated that the substitution position of chlorine greatly influenced the pore volume and specific surface area of constructed PS nanospheres, and the hyper-crosslinked ortho -Cl-functionalized nanospheres ( o - x ClFNs) possessed the highest specific surface area and largest pore volume, followed by para - and meta -Cl-functionalized nanospheres ( p - x ClFNs and m - x ClFNs). Besides, these PS nanospheres were fabricated as even solid phase microextraction (SPME) coatings to study their extraction performance for substituted benzenes, chlorobenzenes, polychlorinated biphenyls (PCBs) and polybrominated biphenyls (PBBs). The experimental results showed that the p - x ClFNs possessed the most outstanding extraction efficiencies for halogenated organic pollutants, and it was combined with gas chromatography-mass spectrometry (GC–MS) to develop a highly sensitive method, realizing the precise quantifications of trace PCBs and PBBs in environmental water. Our work provided invaluable insights on the choice of functional monomer to construct high-performance adsorbent, also demonstrated the important function of PS on the enrichments of organic pollutants.
研究领域:
材料科学
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环境科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2021
·Vol. 83
·期 9
·2192-2206
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IF 1.915
Pu Yanghao,Xie Zhengfeng,Ye Hao,Shi Wei
Modifying environmentally harmful waste polystyrene foam as an efficient recyclable adsorbent for organic dyes is important. Amidation modified polystyrene (PS-SD) was prepared by the Friedel-Crafts reaction and N,N'-dicyclohexylcarbodiimide (DCC) dehydration condensation reaction of waste polystyrene foam. PS-SD had highly efficient removal performance for organic dyes in large volume water sample solutions, and equilibrium was achieved in 0.5 h. The maximum adsorption capacities for Methylene blue (MB) and Congo red (CR) were 881.62 and 1,880.91 mg/g, respectively, at room temperature according to the Langmuir adsorption isotherm (R 2 > 0.99). The kinetic data of the two dyes followed pseudo-second-order kinetics. The removal percentage remained high (>85%) after eight filtration-regeneration cycles. Experimental results showed that PS-SD was an excellent adsorbent for water treatment with high recyclability and long life. Modification of waste materials. The reusability, and high adsorption capacity of amidated PS-SD. High value-added products, which can be used for wastewater treatment.
研究领域:
环境科学
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高分子化学
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水处理技术
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吸附材料
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废弃物资源化利用
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
·
2017
·Vol. 96
·期 5
·1647-1653
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IF 2.209
Zhan W.,Tu J. S.,Qian X. Z.,Li J.,Liu J.
Ionic liquid used in Friedel-Crafts reaction catalytic of dialkyl diphenylamine is a green environmental method. In this paper, butyl-octyl-diphenylamine (BODPA) was synthesized by the series of 1-butyl-3-methylimidazolium chloroaluminate (BMIM-AlCl 3 ) ionic liquids catalysts. Pressure differential scanning calorimetry (PDSC) was used to test antioxidant properties of BODPA in lubricating oil. The influences of various reaction parameters such as dosage of catalysts, molar ratio of diphenylamine to chloralkane, reaction temperature, and time on the alkylation catalyzed by BMIM-AlCl 3 have been studied. The molecular structure and content of alkyl diphenylamine were also characterized by FT-IR/GC-MS.
研究领域:
化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
NEW CARBON MATERIALS
·
2023
·
IF 5.7
Xian-lan Ke,Yu-heng Lu,Jin-lun Wu,Ding-cai Wu
We report the fabrication of vulcanized cross-linked polystyrene grafted on carbon nanotubes (CNTs) for use as an advanced three-dimensional Li host. First, polystyrene was grafted from Br-modified CNTs to form brush-like structure by surface-initiated atom-transfer radical polymerization. Polystyrene grafted on carbon nanotubes was then cross-linked using a Friedel-Crafts reaction and finally vulcanized with sulfur. Vulcanized cross-linked polystyrene grafted on carbon nanotubes was used as a support for the Li metal, and its macro-, meso- and microporous structure increased Li ion transport, buffered the volume changes of the Li anode, and provided a high specific surface area to reduce local current density, which assisted rapid and uniform Li plating/stripping. At the same time, the homogenously distributed sulfur in the support reacted with Li to produce a Li 2 S-containing SEI layer, while the CNTs provided conductive pathways for the rapid transmission of electrons. As a result, a Li|Li symmetric cell using this anode material and a Cu current collector had a stable cycling performance of more than 500 h at a current density of 1 mA cm −2 . When LiFePO 4 was used as the cathode, a full cell had a high discharge capacity of 101 mAh g −1 with a capacity retention of 77% after 600 cycles at 1 C.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）