Sustainable Energy & Fuels
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2018
·Vol. 2
·期 8
·1837-1843
·
IF 0
Zihao Zhang,Zhe Chen,Hao Chen,Xin Gou,Kequan Chen,Xiuyang Lu,Pingkai Ouyang,Jie Fu
In this study, the deoxygenation of stearic acid over a series of Ni-based catalysts in the absence of hydrogen and solvents was investigated. Ni/Al2O3, Ni/TiO2, Ni/ZrO2, and Ni/AC (activated carbon) were synthesized using the wetness impregnation method, and Ni/AC showed the best activity for deoxygenation. X-ray diffraction, transmission electron microscopy, H2 temperature-programmed reduction, and N2 adsorption–desorption analyses revealed that Ni had an average particle size of about 9.6 nm with good crystallinity, the largest surface area and strong Ni–carrier interactions in Ni/AC. These properties of Ni/AC contributed to its good deoxygenation activity. Ni/AC produced hydrocarbons (71.4% yield) such as heptadecane, heptadecene, aromatics, and cracking paraffins under optimized reaction conditions. Furthermore, it was found that the deoxygenation of stearic acid over Ni/AC in the absence of hydrogen and solvent proceeds mainly via decarbonylation.
研究领域:
化学工程
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催化
·
材料科学
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产品关联
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Songxue Wang,Jingjing Xia,Yiding Wang,Jinfeng Zhu,Ming Ming,Yingxuan Fang,Rui Huang,Sujie Shan,Boyin Yan,Wenxiang Xia,Jiayu Tian
In this study, a novel ceramic membrane integrating filtration and peroxymonosulfate (PMS) activation was fabricated by loading the compound catalyst (CuO@ATT/AC) into the membrane channels. The integrated ceramic membrane (IM-CuO@ATT/AC) exhibited remarkable efficiency for PMS activation and was applied to the removal of sulfadiazine (SDZ), demonstrating significant performance under various operational conditions. Through the utilization of free radical trapping experiments and electron paramagnetic resonance (EPR) tests, it had been conclusively demonstrated that the predominant reactive species in the IM-CuO@ATT/AC/PMS system were singlet oxygen ( 1 O 2 ) and Cu(III). And the insights into a potential degradation pathway for SDZ was further provided. The IM-CuO@ATT/AC also exhibited enhanced antifouling performance when tested with real water in the presence of PMS. The present study introduces a new strategy to facilitate the advancement of integrated ceramic membrane processes and the utilization of catalytic membrane filtration technology.
研究领域:
环境科学
·
水处理技术
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
·
IF 10.383
Hang-bo Zheng,Yuan-li Wang,Jia-wei Xie,Peng-zhao Gao,Dong-yun Li,Evgeny V Rebrov,Hang Qin,Xiao-pan Liu,Han-ning Xiao
Renewable electricity from splitting water to produce hydrogen is a favorable technology to achieve carbon neutrality, but slow anodic oxygen evolution reaction (OER) kinetics limits its large-scale commercialization. Electron spin polarization and increasing the reaction temperature are considered as potential ways to promote alkaline OER. Here, it is reported that in the alkaline OER process under an AC magnetic field, a ferromagnetic ordered electrocatalyst can simultaneously act as a heater and a spin polarizer to achieve significant OER enhancement at a low current density. Moreover, its effect obviously precedes antiferromagnetic, ferrimagnetic, and diamagnetic electrocatalysts. In particular, the noncorrected overpotential of the ferromagnetic electrocatalyst Co at 10 mA cm–2 is reduced by a maximum of 36.6% to 243 mV at 4.320 mT. It is found that the magnetic heating effect is immediate, and more importantly, it is localized and hardly affects the temperature of the entire electrolytic cell. In addition, the spin pinning effect established on the ferromagnetic/paramagnetic interface generated during the reconstruction of the ferromagnetic electrocatalyst expands the ferromagnetic order of the paramagnetic layer. Also, the introduction of an external magnetic field further increases the orderly arrangement of spins, thereby promoting OER. This work provides a reference for the design of high-performance OER electrocatalysts under a magnetic field.
研究领域:
能源材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Feng He,Ye Yu,Wubo Wan,Liyuan Liang
In this study an electromagnetic heating strategy is proposed for remediation of trichloroethene (TCE) by ball milled, sulfidated microscale zero valent iron (S-mZVI bm ) particles. S-mZVI bm is ferromagnetic, which generates heat under the application of a low-frequency alternating current electromagnetic field (AC EMF). We found that the temperature reached up to ~120 ℃ during 30-min electromagnetic induction heating of 10 g/L S-mZVI bm (with S/Fe molar ratio of 0.1), compared with ~55 ℃ and ~80 ℃ for ZVI and ball milled mZVI bm , respectively. The application of AC EMF accelerated the TCE degradation rate (k TCE = 5.5 × 10 -1 h -1 ) by up to 4-fold without compromising or even enhancing electron efficiency of S-mZVI bm compared to no-heating. Furthermore, this process halved the generation of chlorinated intermediate, cis-DCE. In contrast, water-bath heating only increased the dechlorination rate 2-fold with unchanged cis-DCE generation and lowered electron efficiency. This is attributed to both rising temperature by induction heating and accelerated ZVI corrosion and surface Fe 0 exposure caused by AC EMF. In real groundwater, the AC EMF maintained the same promoting effects for TCE dechlorination by S-mZVI bm . This study shows that combination of filed-scale available AC EMF with S-mZVI bm provides a promising approach for remediation of chlorinated hydrocarbons in contaminated groundwater.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Xiaoting Hong,Enhao Zhu,Zhuoliang Ye,K.S. Hui,K.N. Hui
Phosphorus removal is essential to avoid eutrophication in water bodies. Layered double hydroxides (LDHs) are widely used to scavenge phosphate through intercalated ion exchange or surface complexation. Moreover, LDHs have attracted increasing attention as electrode modifiers for supercapacitors . Researchers have begun to re-delve the electrosorption technology according to the fundamental principle of electrical double layers. Herein, we propose a new phosphate removal method inspired by the adsorption characteristic and electrical double-layer capacitive properties of LDHs through electrosorption via capacitive deionization. We present a series of experiments to study the enhanced phosphate removal under an electric field via multiple mechanisms on the MgAl-LDHs/AC electrode. The uptake of phosphate by MgAl-LDHs/AC was investigated as a function of phosphate concentration, applied voltage, electrode materials , and temperature. The MgAl-LDHs/AC electrode possessed a salt removal capacity of 67.92 mg PO 4 3− ·g −1 (1.2 V, 250 mg·L −1 KH 2 PO 4 , 30 °C). The electrosorption kinetics of phosphate ions onto the capacitive deionization electrode followed the pseudo-second-order kinetics model rather than the pseudo-first-order kinetics model. Furthermore, the adsorption isotherms of phosphate on the MgAl-LDHs/AC electrode fitted the Freundlich model better than the Langmuir model. The proposed method could be used for phosphate removal.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Jiali Xing,Xun Wang,Yingzhen Gong,Wen Xiao,Xin Zhang,Yaoxi Shen,Yi Chen,Chao Li,Yi Hu
Multicolor stretchable alternating‑current electroluminescent (ACEL) devices hold promise for next‑generation flexible and wearable electronics, yet conventional color‑conversion materials are often limited by high cost, poor operational stability, and complex architectures. Here, solid‑state carbon dots (CDs) with emission spanning the yellow-to-red spectral region were synthesized from terephthalaldehyde and p‑Phenyldiacetonitrile. These CDs exhibit exceptional fluorescence stability under AC fields, retaining over 85% color‑conversion efficiency after 96 h of operation, together with excellent resistance to photodegradation after 96 h of UV exposure, demonstrating their suitability for AC‑driven electroluminescent systems. A single electrospun functional layer incorporating CDs as color-conversion centers was constructed to realize a simplified multicolor ACEL architecture. By tuning the CDs concentration and driving frequency, emission color could be continuously modulated from blue to white (CIE: 0.30, 0.33), orange, and green. Studies revealed that the dielectric properties of CDs crucially regulate the internal electric field distribution. Notably, adding yellow‑emissive CDs increased luminance by 26.60% while enabling efficient color conversion. Furthermore, integration with a resistive sensor and Bluetooth chips allowed real‑time visual monitoring of human joint movements. This work establishes a versatile strategy for developing multifunctional stretchable ACEL systems and highlights their significant potential for smart wearable electronics, health monitoring, and human–machine interaction.
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产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Yuanhong Xu,Nan Lv,Shirui Zhang,Cheng Liu,Andong Zhao,Yuteng Zhang,Haifeng Zhang
Reliable simultaneous thermal and mechanical sensing remains challenging for single-membrane self-powered multimodal sensors due to the difficulty of independently resolving coupled output signals. Here, we report direct current-alternating current (DC-AC) signal decoupling in a contact-asymmetric self-powered sensor based on a flexible polyacrylonitrile/polypyrrole/carbon nanotube nanofiber membrane (PPCNFM). By constructing asymmetric Al/PPCNFM and Cu/PPCNFM contacts at opposite ends of the membrane, an internal electric field is introduced to direct charge transport and regulate stimulus-dependent electrical outputs. Thermal stimulation induces a quasi-static DC baseline through thermally driven charge separation without requiring a deliberately configured hot-cold junction, whereas mechanical loading generates transient AC peaks associated with piezoelectric charge generation. The distinct DC and AC output features enable bias-free discrimination of thermal and mechanical stimuli over 30–90 °C and 0.5–3.5 N, respectively, with reduced signal crosstalk. This work establishes DC-AC signal decoupling in contact-asymmetric nanofiber membranes as a simple interfacial strategy for self-powered multimodal sensing, offering a practical route toward integrated thermal and mechanical signal recognition in flexible intelligent electronics. Download: Download high-res image (296KB) Download: Download full-size image
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DOI
高影响因子
Molecular Catalysis
·
2026
·
IF 4.3
Hanyue Xiao,Shasha Zhao,Kai Peng,Yaoyao Xu,Juan Li,Bodun Xie,Yao Si,Guowei Deng,Min Yang,Wei Li
In 1 M KOH, at 10 mA·cm⁻², the overpotential of HER is as low as 60.6 mV, and the Tafel slope is 90.07 mV·dec⁻¹. • At 100 mA·cm⁻², in 0.5 M H 2 SO 4 , the overpotential of OER is only 247.3 mV. After 300 h, the current density remains at 94.8%, and the voltage for overall water splitting is as low as 1.07 V. • CuRu@NF-AC exhibits excellent water splitting performance over the entire pH range, with the Faraday efficiencies of HER and OER reaching as high as 99.73% and 99.87%, respectively. In response to the energy crisis and environmental issues, to address the shortcomings of traditional electrocatalytic materials such as insufficient activity and poor stability, this study innovatively synthesized CuRu@NF-AC nanomaterials through an interface regulation strategy and systematically investigated their performance in electrocatalytic water splitting (hydrogen evolution reaction (HER) and oxygen evolution reaction (OER)) across the entire pH range. Experimental results demonstrate that this material achieves significant electrocatalytic activity through interface structure optimization. At a current density of 10 mA·cm −2 , the overpotentials for OER and HER in alkaline conditions were as low as 44.4 mV and 60.6 mV, respectively, with Tafel slopes of 30.14 mV·dec⁻¹ and 90.07 mV·dec⁻¹. In acidic conditions, the OER excess potential is only 49 mV and the overall water splitting voltage is as low as 1.07 V. In neutral (1.0 M PBS) electrolyte, the HER overpotential is 302.6 mV at 10 mA·cm −2 with a Tafel slope of 76.25 mV·dec⁻¹, exhibiting superior pH-universal adaptability. In addition, the catalyst exhibits excellent long-term stability, maintaining a stable electrocatalytic performance for >100 h. This study provides a new strategy for designing pH-universal hydrogen evolution electrocatalysts via interface regulation, with important theoretical and practical value. Download: Download high-res image (417KB) Download: Download full-size image
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2025
·
IF 3.7
Fan Zhang,Miaomiao Zhao,Xiaoyu Jia,Chen Li,Degang Ma
Activated carbon (AC) is considered to be an excellent adsorbent due to its high specific surface area and various functional groups. AC powders are available in mesh sizes ranging from 100 to 325. Its particle size prevent its separation from the soil. Therefore, when AC powder is applied to Cd-contaminated soil, it only reduces the bioavailability of Cd and Cd is not necessarily removed but semi-immobilized. Recovery of adsorbent materials from the soil is therefore a preferred soil remediation method. In order to achieve the separation of Cd from soil and the recovery and reuse of AC, a batch of phenolic resin(PR) -carboxymethyl cellulose(CMC) -activated carbon (AC) composite (PCC-800) with uniform particle diameter (Diameter 0.8mm) and high compressive strength was prepared. PCC-800 composites were made of PR/CMC/AC calcined at 800 °C in a certain ratio. The Barrett-Joyner-Halender results showed that the PCC-800 spheres own a mesoporous structure. The compressive strength of PCC-800 pellets was 20.6 N. After first adsorption cycle, total Cd in the soil decreased by 52.18% while bioavailable Cd decreased to 25.68% of the original soil. After three cycles, the recovery rates of PCC-800 were 90.37% and the adsorption regeneration was 72.73%. The PCC-800 immobilized Cd by adsorption, precipitation and complexation reaction. This study demonstrates the potential for developing adsorbents that are both easily separable from soil and highly effective in adsorption.
研究领域:
环境科学
·
土壤修复
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Huanmin Yao,Haibao Mu,Wenrui Tian,Andrea Cavallini,Maoqun Shen,Wendong Li,Daning Zhang,Haoxiang Zhao,Guanjun Zhang
Advanced power modules are evolving toward higher operation voltage and miniaturization, imposing stringent challenges on the electro-thermal co-optimization of packaging materials. However, conventional doping strategies are constrained by the orientation and spatial distribution of fillers, making it difficult to simultaneously achieve high thermal conductivity and excellent electrical insulation. Precisely regulating filler orientation and spatial distribution to maximize electro-thermal synergy remains a critical challenge. This study proposes a synergistic AC-DC combined electric field induction strategy to achieve precise control over filler orientation and targeted enrichment. The AC electric field drives the electrorotation and attraction of SiC whiskers (SiCw), allowing precise orientation to maximize their nonlinear electrical conductivity and thermal conduction properties. Meanwhile, the DC electric field induces the electrophoretic migration of SiCw toward regions of high electric and thermal field concentration, enabling device-level targeted optimization. Experimental results demonstrate that this strategy enhances the thermal conductivity of SiCw/silicone elastomer (SE) composites by 333 % (reaching 0.65 W/(m·K)) while maintaining excellent thermal stability. Additionally, the nonlinear electrical conductivity coefficient is tunable within the range of 0.9 to 4.9, and the switch-field strength is reduced to 1.07 kV/mm, showing superior electric field responsiveness. Further simulations and experiments reveal that the composite reduces peak electric field stress by 32.5 % and increases the partial discharge inception voltage (PDIV) by 54.4 %, significantly enhancing the insulation reliability of power modules. This breakthrough in electro-thermal performance optimization marks a significant advancement in the electrical insulation and thermal protection of high-voltage power modules.
研究领域:
材料科学
·
电力电子学
✓ 已验证
产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2020
·Vol. 98
·期 10
·
IF 1.171
Cheng Cao,Xingmei You,Lei Feng,Guanghong Luo,Guoren Yue,Xiangdong Ji
Two new chromogenic sensors 1-(2-hydroxyphenyl)-3-(4-nitrophenyl)thiourea 1 and 1-(3-hydroxypyridin-2-yl)-3-(4-nitrophenyl)thiourea 2 bearing nitrophenyl and thiourea groups were designed and synthesized by one-step procedure and characterized through 1H NMR, 13C NMR, FTIR, and MS. The anion recognition property of the receptors was studied via naked-eye detection, UV–vis, and 1H NMR. Based on the existence of amino gen and hydroxyl moieties in receptors, receptors 1 and 2 exhibit obvious selectivity by the redshift of UV–vis signals, colour changes through naked-eye detection, and binding effects for F–, H2PO4–, and Ac–. Surprisingly, the detection limits of receptor 1 for F– and Ac– were calculated to be 5.45 × 10−7 and 2.11 × 10−7 (mol/L)−1, respectively, which indicated that F– and Ac– can be identified with high sensitivity by receptor 1. Besides, simple “test strips” were developed and were used as sensors for recognition of F–, H2PO4–, or Ac– in DMSO solution. Lastly, the mechanisms of the recognition process were studied through DFT calculation and 1H NMR titration.
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Yinghui Sun,Guojie Zhang,Haizhu Cheng,Jun Liu,Guoqiang Li
The mechanism and kinetic features of dry reforming with methane (DRM) over Ca promoted 1Co–1Ce/AC-N catalyst was investigated. The mechanistic pathway studies have conducted by FTIR and XPS analysis, structure-activity correlations demonstrated the CH 4 and CO 2 could adsorb on catalyst active sites and generate intermediate CH x , OH and CH x O, continue to generate CO and H 2 and then desorbed from active sites. Moreover, CH 4 could also oxidized by Ce 4+ and CO 2 reduced by Ce 3+ , the same content of Ce 4+ and Ce 3+ on promoted catalyst greatly improved the reaction rate. The kinetic of dry reforming with methane was examined for temperature between 650 and 850 at 800 °C. The research was carried out by changing the CH 4 /CO 2 ratios between 0.3 and 3.0. The obtained experiment data were fitted by three typical kinetic models (Power Law, Eley-Rideal and Langmuir-Hinshelwood), the fitting results demonstrated that the best prediction of reforming rates can provided by Langmuir-Hinshelwood model for the reaction temperatures between 650 and 800 °C. Moreover, activation energies of methane and carbon dioxide consumption were −117 and −47 kJ/mol, indicating that much higher energy barrier is needed for methane activation compared to carbon dioxide.
研究领域:
化学工程
·
催化科学
✓ 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）