FUEL
·
2025
·
IF 7.5
Caitao Chen,Juan Ma,Yakun Tang,Xiaohui Li,Guangbo Liu,Hanyao Song,Yingluo He,Noritatsu Tsubaki,Lang Liu,Ting Liu
Cleaving the aromatic ether C-O bonds of lignite through catalytic hydroconversion (CHC) presents a significant challenge for producing organic chemicals and clean liquid fuels, which are vital for a sustainable future. In this study, we employed a sacrificial template-self-recovery strategy to synthesize highly dispersed and carbon-coated bimetallic catalysts MCo/C (M = Fe, Cu, Ni) for the CHC of Naomaohu coal (NMHC) and lignite-related model compounds (LRMCs). The carbon-coated NiCo bimetallic alloy catalysts, benefiting from the high dispersity of the active components and the synergistic effect between Ni and Co, exhibited excellent hydrogenolysis activity towards diphenyl ether (DPE). DPE conversion reached 100 % over Ni 3 Co 1 /C under optimal conditions (120 °C, 2 MPa H 2 , 2 h). Moreover, Ni 3 Co 1 /C significantly increased the content of arenes and alkanes while reducing the content of oxygen-containing compounds in the NMHC soluble portion (SP), demonstrating its efficient catalytic hydrogenolysis and hydrodeoxygenation capabilities. Density Functional Theory (DFT) calculations revealed that the Ni 3 Co 1 /C catalyst could activate H 2 to generate hydrogen radicals and diatomic active hydrogen, which are the primary hydrogen species involved in the reaction and affect the CHC of DPE. The experimental results can provide a reference for the conversion of lignite into clean liquid fuels.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jian Wang,Zhenquan Wang,Zhiming Li,Naxing Liu,Yang Luo,Yuxiao Chu,Long Jiang,Fu-Gang Zhao,Kai Zhang,Xunshan Liu,Yongmiao Shen
Supercapacitor is an electrochemical energy-storage technology that can meet the green and sustainable energy needs of the future. However, a low energy density was a bottleneck that limited its practical application. To overcome this, we developed a heterojunction system composed of two-dimensional (2D) graphene and hydroquinone dimethyl ether- an atypical redox-active aromatic ether. This heterojunction displayed a large specific capacitance (Cs) of 523 F g −1 at 1.0 A g −1 , as well as good rate capability and cycling stability. When assembled in symmetric and asymmetric two-electrode configuration, respectively, supercapacitors can work in voltage windows of 0 ∼ 1.0 V and 0 ∼ 1.6 V, accordingly, and exhibited attractive capacitive characteristics. The best device can deliver an energy density of 32.4 Wh Kg −1 and a power density of 8000 W Kg −1 , and suffered a small capacitance degradation. Additionally, the device showed low self-discharge and leakage current behaviors during long time. This strategy may inspire exploration of aromatic ether electrochemistry and pave a way to develop electrical double-layer capacitance (EDLC)/pseudocapacitance heterojunctions to boost the critical energy density.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Polymers
·
2019
·Vol. 11
·期 6
·1036
·
IF 3.164
Sijing Chen,Dengxun Ren,Bo Li,Kui Li,Lin Chen,Mingzhen Xu,Xiaobo Liu
Benzoxazine containing fluorinated aromatic ether nitrile linkage (FAEN-Bz) had been synthesized from 2,6-dichlorobenzonitrile, 4,4’-(hexafluoroisopropylidene)diphenol (bisphenol AF), 3-Aminophenol, formaldehyde, phenol by condensation polymerization and Mannich ring-forming reaction. Structures of the monomer were verified by Proton NMR spectrum (1H-NMR) and Fourier transform infrared spectroscopy (FTIR). Curing behaviors and curing kinetics of designed monomers were investigated and discussed. The activation energy was calculated and possible polymerization mechanisms were also proposed. Then, properties of cured polymers including crosslinking degrees, thermal decomposition, surface wettability and energy, and dielectric properties were studied and discussed. Additionally, programmed integral decomposition temperature (IPDT) was also used to evaluate the thermal stability of final polymers. Results indicated that the incorporation of benzoxazine and nitrile resulted in increased thermal stability and char yields. Moreover, the surface wettability and dielectric properties of poly(FAEN-Bz) can be easily controlled by tuning the curing temperatures and time.Keywords:benzoxazine;aromatic ether nitrile linkage;curing kinetics;thermal stability;dielectric properties
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
LETTERS IN ORGANIC CHEMISTRY
·
2024
·Vol. 21
·期 9
·784-789
·
IF 0.7
Mao Xiaoxia,Zhang Yuying,Wang Keyang,Zhao Guiqin,Zhou Dejun,Cui Zhengguo
In this study, an efficient method for the synthesis of one type of aromatic ether was introduced, and its antitumor activity was investigated. Specifically, (diacetoxyiodo)arene was prepared from 2-methyliodobenzene and used to oxidize the 4-nitrophenol to give the aromatic ether.
Our study further found that aromatic ether has a strong apoptotic effect on U937 monocytes, suggesting that it might be developed as a new drug for the treatment of acute myeloid leukemia.
研究领域:
药物化学
·
肿瘤学
✓ 已验证
DOI
高影响因子
Sustainable Energy & Fuels
·
2020
·Vol. 5
·期 4
·963-972
·
IF 5.503
Sen-Wang Wang,Zhen-Hong He,Jian-Gang Chen,Kuan Wang,Zhong-Yu Wang,Pan-Pan Guo,Jie Lan,Weitao Wang,Zhao-Tie Liu
Hydrogenolysis of biomass-derived lignin sources is highly important for the conversion of renewable biomass resources to biofuels. However, lots of developed catalysts suffer from the drawbacks of expensive precious metal catalysts and/or operation under harsh conditions. In the present work, Co–Ni bimetallic catalysts were prepared and applied in catalyzing hydrogenolysis of Caryl–O aromatic ethers with high activities under the promotion of Nb2C MXene additive. Especially, the hydrogenolysis of diphenyl ether (DPE), a 4–O–5 model compound, to cyclohexane (cy) and cyclohexyl alcohol (cy-ol) could be achieved over the Co2Ni1Ox–Nb2C MXene catalytic system at 120 °C and under 5 bar of H2, which are mild conditions in comparison with those for the developed heterogeneous precious-metal-free catalysts. The excellent catalytic performances stemmed from the strong interaction between Co and Ni species and the promotion of Lewis acidic sites offered by Nb2C MXene. The proposed reaction pathway involved the direct hydrogenolysis of DPE route, in which DPE was initially hydrogenolyzed to benzene and phenol. They were further hydrogenated to cy and cy-ol. The present work not only develops a noble-metal-free bimetallic catalyst for utilization of biomass-derived lignin sources, but also provides a novel strategy for using the Nb2C MXene material.
研究领域:
催化化学
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能源材料科学
·
生物质转化
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Xinxiu Cao,Liang Xie,Xinyu Zhu,Jiayu Lv,Hui Fan
Processing solvent additives is an effective approach to improve the performance of polymer solar cells (PSCs). However, traditional additives, such as 1-chloronaphthalene (CN) and 1,8-diiodooctane (DIO), are halogenated solvent, which is not environmentally friendly. Here, we investigated the device performance of PTB7:PC 71 BM blend films processed with three aromatic ethers, CN and DIO. The results indicate that aromatic ethers have a higher device performance improvement than halogenated solvents. Using green solvent 1,2-dimethoxybenzene as the processing additive, the efficiency of PSCs was improved from 2.83% to 6.18%. We proposed two criteria to choose green solvent additives: (i) good solvent for PC 71 BM and nonsolvent for PTB7, (ii) higher boiling point than the host solvent, but not too high (about 70 ℃ higher is enough). The X-ray diffraction results indicated that PTB7 does not crystallize in the blend films, and thus the formation of phase separation morphology is primarily through liquid–liquid (L-L) phase separation. The structure analyses of the blend films demonstrated that solvent additives with poor solubility to PTB7 are beneficial in eliminating PC 71 BM sea-island domains and in promoting the formation of bi-continuous phase separation morphology, while nonsolvent additives with relatively lower boiling point could prevent PC 71 BM from moving to the bottom layer of the blend films during the drying process and thus the resulting films have a better vertical phase separation structure. The selection principles of green solvent additives proposed in this study can be further used to optimize the active layer structure of other PSCs occurred upon L-L phase separation.
研究领域:
材料科学
·
可再生能源
·
化学
✓ 已验证
产品关联
DOI
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2023
·
IF 5.1
Ni Liu,Hui Wang,Shun Wang,Baosheng Xu,Lijie Qu
Endowing conventional epoxy resin (EP) with great liquid oxygen compatibility (LOC) and desirable ultra-low-temperature mechanical property is essential to the applications in fields of cryogenic engineering. A reactive phosphaphenanthrene aromatic ether diamine (PBAH) flame retardant including phosphorus and nitrogen elements was synthesized by a simple one-pot reaction between HB (salicylaldehyde), DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) and BAPP (2,2-bis[4-(4-aminophenoxy)phenyl]propane), then utilized to modify EP/BCI (biscitraconimide resin) system as a multifunctional component in this study. The resultant EP represented improved heat stability; outstanding fire resistance with an improvement of limiting oxygen index (LOI) value of 31.7% and V-0 rating in UL-94 test, as well as the desirable LOC and enhanced mechanical properties. The tensile strength (130.49 MPa) and fracture toughness (2.93 MPa·m 1/2 ) increased by 51.3% and 78.7%, respectively, and the bending strength (255.30 MPa) increased by 116.8% than that of pure EP at cryogenic (77 K). All these results demonstrated the reactive PBAH showed a broaden potential in ultra-low-temperature engineering fields.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jin Wang,Yu Dai,Shicheng Xu,Haoxing Jiang,Ronghuan He
The trade-off between proton conductivity and mechanical property is a critical issue to phosphoric acid (PA) doped high temperature proton exchange membranes (HT-PEMs) for using as the electrolytes in various devices. Uniformly introducing additives into polymer matrix is required for improvements on the properties of the polymer membranes. Herein, the hydrophilic and acidophilic octa-amino polyhedral oligomeric silsesquioxane (OA-POSS) is synthesized for using as a filler and a crosslinker concurrently to prepare HT-PEMs based on poly(aromatic ether sulfone) (PAES). The PA doped membrane with a crosslinking degree of 10% exhibits a proton conductivity of 97.4 mS cm −1 at 180 °C without humidifying, and an enhanced tensile stress of 8.5 and 2.4 MPa under ambient atmosphere and 110 °C, respectively, which are about 60% and 70% higher than those of the pristine quaternary ammonium PAES membrane. A peak power density of 461 mW cm −2 is achieved by the membrane at 200 °C by fueling the fuel cell with non-humidified H 2 and O 2 without backpressure . Comprehensive characterizations on the structure, PA doping level, anhydrous proton conductivity, as well as dimensional stability and PA retention ability of the prepared membranes are made.
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
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Xin Song,Chunfeng Li,Lei Le,Zhihao Zhang,Mingli Liu
Waterborne polyurethanes (WPUs) have emerged as the preferred option for researchers aiming to replace solvent/emulsion-based resins in carbon fibers (CFs) coatings, owing to their superior adhesion, eco-friendliness, and cost-effectiveness. However, conventional polyether/polyester-based WPU coatings often exhibit insufficient mechanical properties, thermal stability, and weathering resistance. To address these limitations, a diol (PHBA-D1000) containing dynamically reversible imine bonds was synthesized via Schiff base formation between 4-hydroxybenzaldehyde (PHBA) and Jeffamine D1000. Ethoxylated bisphenol A (BPE) and 1,4-bis(2-hydroxyethoxy) benzene (HQEE) were copolymerized proportionally as co-monomers, using PHBA-D1000 as the soft-segment backbone to produce BPE/HQEE-modified WPUs (EWPUs). These EWPUs incorporate π-π conjugated benzene stacking, aromatic ether, biphenyl, carbamate, polyurea, imide, carboxylic acid, and carbonyl groups within their molecular structure. The synergistic effects of these co-monomers improved the overall properties of EWPUs, yielding coatings with better thermal stability (T5% at 269.5 °C), higher tensile strength (46.1 MPa), and greater adhesion (18.7 kPa), showcasing improvements of 26.7 %, 95.3 %, and 21.9 %, respectively. Utilizing EWPUs as sizing coatings significantly enhanced the reactivity, wettability, and mechanical properties of CFs. These coatings introduced functional groups and rigid chains onto the fiber surface, effectively repairing CF surface defects and increasing surface roughness. The surface energy and monofilament tensile strength of EWPU-coated CF reached 59.3 mN/m and 6.216 GPa, respectively, corresponding to improvements of 66.1 % and 24.5 % compared to unsized CF. EWPUs demonstrate outstanding overall performance and notable functional characteristics, highlighting their significant potential for diverse applications and further development.
研究领域:
高分子材料科学
·
复合材料工程
·
表面功能化
·
纳米涂层技术
·
胶体与界面化学
✓ 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）