CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Chunhua Zhang,Zhengyan Qu,Hong Jiang,Rizhi Chen,Weihong Xing
Phenol hydrogenation is a green route to prepare cyclohexanone, an intermediate for the production of nylon 66 and nylon 6. The development of high-performance catalysts still keeps a great challenge. Herein, the activated carbon (AC) was modified with an acidic material Nb 2 O 5 to adjust the microstructure and surface properties of AC, and the influences of the calcination temperature and Nb 2 O 5 content on the catalytic performance of the Pd/AC-Nb 2 O 5 catalysts for the phenol hydrogenation to cyclohexanone were investigated. The Nb 2 O 5 with proper content can be highly uniformly distributed on the AC surface, enhancing the acidity of the Pd/AC-Nb 2 O 5 catalysts with comparable specific surface area and Pd dispersion, thereby improving the catalytic activity. The hybrid Pd/AC-10Nb 2 O 5 -500 catalyst exhibits the synergistic effect between the Pd nanoparticles and AC-10Nb 2 O 5 , which enhances the catalytic activity for the hydrogenation of phenol. Furthermore, the as-prepared Pd/AC-10Nb 2 O 5 -500 catalyst shows good reusability during 7 reaction cycles.
研究领域:
化学工程
·
催化材料
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yu Su,Haitao Xie,Congzhou Li,Zhongjing Xia,Wenheng Xu,Zilong Mao,Guixiang Zhan,Kan Liao,Jiaqi Li,Jinze Li,Junran Zhang,Yao Yin,Lin Wang
2D Ruddlesden-Popper (RP) phase perovskites are promising materials for optoelectronic devices due to their unique properties and environmental stability. In this work, fully electrical, dynamic, and reversible modulation of photoluminescence (PL) intensity in RP-phase perovskite nanosheets at room temperature is achieved for the first time using alternating current (AC) electric fields. A capacitor structure with (PEA) 2 PbI 4 nanosheets and HfO 2 enables significant PL quenching, with the largest modulation amplitude reported to date. The degree of quenching depends on AC field parameters, including amplitude, frequency, waveform, and inter-electrode phase difference. Temperature-dependent measurements and impedance spectroscopy (IS) reveal that the PL quenching originates from an interfacial polarization field formed by AC-driven ionic displacement and directional accumulation, which perturbs exciton recombination. This work provides insights into ion migration and electric field interactions in 2D perovskites. It also establishes an energy-efficient method for tuning optoelectronic properties, offering a practical route for developing adaptive photonic systems and low-power, electrically tunable devices.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Le Gou,Longfei Xie,Yuanyuan Wang,Liyi Dai
The production of amine intermediates from biomass is capturing increasing attention. Herein, an efficient conversion of furfural to furfural amine over RuCo/AC catalyst under hydrothermal conditions has been investigated. The effects of different carriers, bimetals, and reaction conditions were systematically investigated in green solvents (water). Fully conversion of furfural and high furfural amine yield (92.13%) at 80 ℃ for 1 h over 4Ru1Co/AC. The excellent catalytic performance of 4Ru1Co/AC was attributed to its high acidity and good hydrogenation ability, as well as the synergistic effect between Ru-Co alloy formations and the activated carbon. Importantly, the highly selective preparation of furfural to furfural amine is a promising way to high-value utilization of cellulosic biomass in green solvents.
研究领域:
化学工程
·
催化反应
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Hang-bo Zheng,Shuai-qi Jing,Yuan-li Wang,Peng-zhao Gao,Hang Qin,Dong-yun Li,Wen-ming Guo,Xiao-pan Liu,Han-ning Xiao
Reducing the overpotential of oxygen evolution reaction (OER) with slow kinetics is important to realize commercial hydrogen production from water electrolysis . Here, ZnCo 2 O 4 with abundant surface oxygen vacancies is employed to clarify the influence of oxygen vacancies on OER performance under AC magnetic field. The additional active sites as well as enhanced reaction activity of each active sites resulting from oxygen vacancies enable N–ZnCo 2 O 4-δ -350 to exhibit outstanding OER performance, where the overpotential is 406 mV at 10 mA cm −2 . Furthermore, double exchange interaction between Co 2+ -O 2- -Co 3+ ignited by oxygen vacancies produces ferromagnetism in N–ZnCo 2 O 4-δ , which can directly promote OER under ACMF. And the mass transport at additional active sites active sites provided by oxygen vacancies is also accelerated under ACMF due to magnetohydrodynamic convection. As a result, non-iR-corrected overpotential at 10 mA cm −2 of N–ZnCo 2 O 4-δ -350 is reduced to 243 mV when the ACMF intensity is 4.752 mT, which is a 44.5% reduction compared to no ACMF. These findings provide a novel and efficient perspective for realizing efficient electrocatalysis .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Polymer Science
·
2018
·
IF 1.718
Xin Wang,Pin Chen,Xiaohong Hu
The focus of nanoparticle research is on exploring its application in all kinds of field. Among these, multifunctional nanoparticle attracts increasing interest due to its fittest property and adjustable property. Herein, a multifunctional and multistage nanoparticle considering the advantage of both nanogel and pH-responsive property has been designed and synthesized in the research. The composite nanoparticle was obtained by in situ processing and polymerization technique using acetylated β-cyclodextrin and gelatin as materials. Gelatin was first encapsulated into Ac-β-CD nanoparticle in order to investigate optimal fabrication conditions of W/O/W technique. The results showed that the nanoparticle had monodisperse characteristic and coarse spherical morphology, which was influenced by factors such as PVA concentration and water/oil ratio. In further step, two-phase composite nanoparticle could be obtained by combined W/O/W technique and in situ polymerization using optimal preparative parameters of W/O/W technique. Two-phase structure could be confirmed by TEM images and DLS results. Fabrication temperature had no effect on the diameters of composite nanoparticle, but influenced the encapsulated efficiency of nanogel. Finally, composite nanoparticle showed quick pH response property at mild acid medium and no obvious cytotoxicity.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2019
·Vol. 136
·期 48
·48362
·
IF 2.188
Xianwu Jing,Youquan Liu,Wei Li,Yuan Xu,Zhiyu Huang
A water-miscible nonionic surfmer (AC-TX100) was synthesized based on Triton X-100 and acryloyl chloride. Then, a terpolymer P(AM/AA/AC-TX100) was synthesized by free radical polymerization in aqueous solution and intended to be used as drag reducing agent (DRA). The DRA was defined to be P(AM 87.32 /AA 12.46 /AC-TX100 0.22 ) according to 1 H NMR and elemental analysis, the molecular weight was 2.12 × 10 6 g/mol according to scattering method. DRA shows excellent performance in drag reduction (DR). The highest DR rate of 76% can be obtained when DRA concentration is 0.023% in fresh water; while in brine containing 3% NaCl, DR rate decreases, and it is necessary to increase the concentration to 0.05% to ensure that DR rate is higher than 70%. SEM and cryo-TEM show that DRA forms a network structure in aqueous solution, and the tightness of this structure has a direct influence on DR performance. Specifically, DRA molecules stretch into the whirlpools generated by water at high flow rates, reducing the quantity and intensity of whirlpools, thereby lowering the energy loss and the friction. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48362.
研究领域:
高分子化学
·
流体力学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2022
·
IF 3.318
Yu-Ming Fang,Qi-Lei Zhang,Dong-Qiang Lin,Shan-Jing Yao
Short peptide biomimetic chromatography technology as a developing protein separation technology has huge potential for antibody purification. In this study, four tetrapeptide ligands (Ac-FYKH, Ac-YEHF, Ac-YFLH and Ac-FYHI) with high potential binding ability to antibody were selected for the optimal ligand to antibody purification. The results showed that Ac-YEHF-4FF resin had higher binding capacity and selectivity for hIgG among the four resins. And at pH 7.0 and 0.3 ml/min, the highest Q 10%-hIgG of Ac-YEHF-4FF resin was 26.2 mg/ml resin while its Q 10%-BSA was just 2.2 mg/ml resin. Further, Ac-YEHF-4FF resin was used to purify protein mixtures. By binding at pH 7.0 and being eluted at pH 5.0 and pH 4.0, Ac-YEHF-4FF resin was well used to separate hIgG from BSA containing feedstock, HSA containing feedstock and human serum with the purity and yield both more than 95 %. And the screened resin could also separate mAb from CHO cell culture supernatant with purity 94.3 % and yield 97.5 %. The adsorption and separation results of Ac-YEHF-4FF resin indicated that the goal of getting the efficacy of critical residues from protein A to biomimetic its structure and function could be achieved, which had great significance to the establishment and improvement of tetrapeptide biomimetic chromatography, and also provided a new method for the field of antibody separation and purification.
研究领域:
生物化学
·
蛋白质工程
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2025
·Vol. 37
·期 10
·e70063
·
IF 2.3
Weiyi Chen,Meng Wang,Shijie Xu,Lu Li,Xiaodi Liu,Debao Xiao
Electrochromic devices (ECDs) have been extensively studied worldwide due to their promising applications in various fields. To the best of our knowledge, all previously reported ECDs are exclusively driven by direct current (DC), which has been the conventional approach in electrochromic research. In this article, we propose that the ECD driven by alternating current (AC) should be testified. The ECDs were sandwiched in all-in-one mode using 1,1′-dibenzyl-4,4′-dipyridine dichloride as electrochromic chromophore. The electrochromic performance of the as-AC-driven ECDs was examined as a function of AC frequency from 0.1 to 1000 Hz. It is found that electrochromic based on dibenzyl viologen can work driven by AC, but with some differences from that by DC. The optical contrast is directly proportional to the logarithm value of AC frequency in the range from 0.1 to 1000 Hz, which suggests that the AC-driven ECD may potentially be useful as a visual indicator for AC frequency.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER TESTING
·
2025
·
IF 6
Ke Li,Lu-Ming Zhou,Yun-Xiao Zhang,Yuan-Xiang Zhou
Electrical treeing is a primary degradation pathway in cross-linked polyethylene (XLPE) cable insulation, making enhancement of the tree-initiation voltage (TIV) critical for reliable high-voltage operation. We report a peroxide-assisted grafting strategy that covalently incorporates 2-vinylanthraquinone (VAQ) into XLPE during standard crosslinking, thereby addressing the migration and durability limitations of physically blended stabilizers. The grafted VAQ introduces deep electronic traps and mitigates defect-driven degradation, increasing the characteristic TIV by more than 160 % and markedly suppressing tree growth under AC voltage. This migration-resistant, trap-engineered stabilization provides a practical route to improve long-term insulation reliability and is directly relevant to the design of ultra-high-voltage polymeric cables.
研究领域:
高分子材料科学
·
电气工程
·
绝缘技术
·
功能材料
·
电力系统可靠性
✓ 已验证
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Xiao Chu,Chen Chen,Ying Liang,Yuliang Chen,Yuliang Wu,Yijiang Liu,Rui Meng,Wenmin Wang,Weiwei Huang,Fei Yang,Xuesong Yi,Jun Cheng
The massive emission of dye wastewater has caused significant environmental problems. In this study, zinc-doped titanium dioxide loaded on biochar was synthesized by a simple solvothermal method to investigate its ability of degradation for dyes in photocatalytic process. The discussion focused on the impact of unactivated, acid-activated, and alkali-activated biochar on the properties of composites. Additionally, the composite catalysts underwent comprehensive physical and chemical characterization. The results showed that the particle size of Zn-TiO 2 OHAC increased significantly, which improved the sedimentation performance. Zn-TiO 2 OHAC demonstrated exceptional photocatalytic efficiency in the degradation of various pollutants such as Rhodamine B, Congo Red, Methyl Orange, and Methylene Blue. The better performance of the alkali-treated biochar-loaded composite catalysts was attributed to the fact that the alkali-treated biochar changed the electronic structure of the loaded materials and contained more carbon-oxygen functional groups, which was favorable for the separation of electrons and holes.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Yu Han,Wei Zhao
Induced-charge electro-osmosis (ICEO) is prevalent in electrochemistry and micro/nanofluidics, even when subjected to an alternating current (AC) electric field. Previous studies suggest that ICEO primarily occurs near electrodes or ion-selective membranes within a range of tens of microns. In this experimental study, we reveal the existence of additional modes in ICEO driven by an AC electric field. We demonstrate that nonlinear electroosmotic flow (EOF) can occur between two electrodes situated 5 mm apart through long-range electroconvection. Notably, we observe a soliton-like wave of ion concentration fluctuation traveling from the working electrode to the ground electrode, causing significant disruption to the electric triple layer (ETL) on the ground electrode. Consequently, both the ETL structure on the electrodes and the bulk fluid are profoundly influenced by an external electric field. These findings are vital for enhancing the understanding of intrinsic dynamics in electrochemical and energy systems and for the development of novel micro/nanofluidic devices.
研究领域:
微流控学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yapeng Tian,Chenhui Yang,Yi Tang,Yangyang Luo,Xiaojie Lou,Wenxiu Que
Supercapacitors with an advanced high volumetric energy density require a match of both electrodes materials and suitable electrolyte. Here, aqueous asymmetric supercapacitors are designed by employing layered Ti 3 C 2 T x as negative electrodes and highly compact activated carbon (AC) as positive electrodes. Ti 3 C 2 T x //AC asymmetric supercapacitors (Ti 3 C 2 T x //AC ASCs) with 1.7 V voltage window are designed by regulating the mass ratio of both electrodes, which results from the shift of the open circuit potential with different applied voltages. Then, dual-ion hybrid supercapacitors (Ti 3 C 2 T x //AC-KBr HSCs) are also constructed by introducing redox active (KBr) into traditional electrolyte (H 2 SO 4 ) for Ti 3 C 2 T x //AC ASCs to achieve a high volumetric energy density, in which fast hydronium ion intercalated pseudocapacitance happens at the Ti 3 C 2 T x negative electrode, while redox reaction of Br − /Br 3 − within the highly compact AC happens at the positive electrode. As a result, the Ti 3 C 2 T x //AC-KBr HSC achieves a high volumetric capacitance of 250 F cm −3 at 2 mV s −1 , a volumetric energy density of as high as 102.8 Wh L −1 at 424 W L −1 and an outstanding cycling stability with 122% capacitance retention after 6000 cycles. Furthermore, the self-discharge performance for the Ti 3 C 2 T x //AC-KBr HSC is obviously improved, which is mainly ascribed to the adsorption of oxidized species at the AC surface.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）