ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Jianmeng Chen,Yijing Xia,Qizhou Dai
This study presents an electrochemical method for the degradation of chloramphenicol (CAP) in aqueous solution with a novel Al doped PbO 2 electrode. The Al-doped PbO 2 electrode showed high electrochemical activity, oxygen evolution potential, radical utilization rate, reusability and safety. The influence factors on CAP degradation with the Al-doped PbO 2 electrode were investigated in detail, and under the optimal conditions the removal rates of CAP and TOC reached 87.30% and 52.06% in acid conditions after 2.5 h electrolysis with a 0.2 mol dm −3 Na 2 SO 4 at a current density of 30 mA cm −2 , respectively. The electrochemical degradation of CAP at Al-doped PbO 2 electrode electrode followed pseudo-first-order kinetics. The degradation mechanism was proposed by cyclic voltammograms tests and it was deduced that hydroxyl radicals generated in the electrochemical process played a key role in oxidizing CAP. Finally, based on the reaction products identified, a possible degradation pathway including radical reaction, ring open and mineralization was proposed.
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Materials Research Express
·
2019
·Vol. 6
·期 8
·086472
·
IF 1.449
Zhengjun Shen,Yannan Zhang,Xiaohua Yu
The interfacial microstructure of an Al-based coating on a Ti alloy surface has been designed by using phase diagrams and advanced first-principles calculations. Samples were characterized by x-ray diffractometry, scanning electron microscopy, optical microscopy, high resolution transmission electron microscopy and energy-dispersive spectrometry. The results show that the stability sequence of the Ti–Al intermetallics was Ti3Al > TiAl > TiAl2 > TiAl3. The TiAl3 transition layer with a strong self-healing property was obtained easily by metallurgical reaction of Al and Ti. The Al atoms in TiAl3 combined rapidly with the O atoms to form a new Al2O3 protective layer in air. This work provides theoretical support for the thermal processing of Ti alloys.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Gangyong Li,Mingyin Kou,Jiguo Tu,Yiwa Luo,Mingyong Wang,Shuqiang Jiao
Transition metal selenides (TMSs) are promising candidates for positive electrodes of rechargeable Al batteries (RABs) owing to their appealing merits of high specific capacity and relatively low-cost. However, TMSs suffer from fast capacity fading. To tackle the dramatic capacity loss in TMS positive electrode, herein, we design a coordination adsorption strategy into RABs using CuSe as a conversion-type positive electrode material , with significantly enhanced cycling stability and rate capability. Ex situ X-ray photoelectron spectroscopy and electron microscopy measurements unveil that both Cu and Se species experience reversible redox reaction during the charge/discharge processes and the fast capacity-deterioration is due to the dissolution of electroactive Cu and Se species into the electrolyte. Theoretical calculations reveal that the suppressed shuttle effects can be attributed to the presence of strong coordination interaction between nitrogen-doped reduced graphene oxide and the soluble active Cu and Se species. Consequently, such delicately engineered RABs exhibit an excellent cycling stability of 216.1 mA h g −1 after 500 cycles at 500 mA g −1 with an outstanding rate performance. This study offers an alternative approach to restrain the shuttle effects of active species for achieving advanced RAB system, with the potential importance far beyond the battery chemistry.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Xiaopeng Han,Ying Huang,Qiao Gao,Rui Fan,Xuanyi Peng
NT@Cu and Ag@GF supported the aluminum (Al) composites had been synthesized by vacuum gas pressure infiltration and their microstructure, Coefficient of thermal expansion (CTE), thermal and mechanical properties were investigated. Cu particles encapsulated with NT had been designed to improve the dispersion of NT and form a carbon conductive network. The chemical plating process was used to enhance the wettability between graphite flakes (GF) and Al matrix and eliminate the harmful interfacial reactions. The composites of NT3 had displayed excellent in-plane thermal conductivity (TC) of 378.48 W/mK and stable CTE in high temperature application environment. What's more, the bending strength had been enhanced to approximately 85.15 Mpa. In this study, the innovative way can be applied to fabricate NT@Cu/Ag@GF/Al composites.
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WATER RESEARCH
·
2025
·
IF 12.4
Lingyu He,Xin Zhang,Yang Lei
This study proposes a hybrid electrochemical oxidation-coagulation (EOC) system that integrates a Ti₄O₇ anode with a cathode fabricated from waste aluminum cans, enabling the simultaneous degradation of phosphonates and removal of hardness ions from cooling water. Compared to standalone electrooxidation (EO) and conventional chemical coagulation (CC), the EOC system achieved 41.9% Ca²⁺ removal, 91% total soluble phosphorus (TSP) elimination, and 67.2% conversion of phosphonate to phosphate within 2 hours. Mechanistic studies revealed that the hybrid EOC system performs a synergistic effect, including anodic oxidation of antiscalant (nitrilotris methylene phosphonic acid, NTMP), and the cathodic dissolution of aluminum, generating coagulants that facilitate the concurrent removal of hardness ions and residual phosphorus. The presence of chloride ions enhanced NTMP degradation via the generation of reactive chlorine species (RCS) without impacting Ca²⁺ removal efficiency, whereas the presence of magnesium ions promoted Ca²⁺ removal via Mg(OH)₂ formation, which provides nucleation sites for co-precipitation. On top of mechanical insights, practical validation with real cooling water confirmed the practical effectiveness and robustness of the EOC system. Moreover, energy consumption analysis revealed that the EOC system significantly reduced energy demand for calcium and TSP removal by 91% and 76%, respectively, compared to the EO system. Overall, this work underscores an efficient and cost-effective electrochemical approach for industrial cooling water treatment, establishing foundational insights for scalable implementation.
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DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xin-Ru Chen,Heng Mao,Qiu-Ying Zhang,Wei-Min Liu,Shen-Hui Li,Qian-Qian Li,Li-Hao Xu,Yan-Mei Zhang,Xin-Yue Zhang,Jun-Jie Liu,Ao Kou,Zhi-Ping Zhao
Interfacial engineering in mixed matrix membranes (MMMs) is essential to attain superior separation performance and ensure long-term operational stability. In this research, a range of novel MMMs were designed and fabricated for pervaporation (PV) separation of n-butanol/water solution by introducing the MIL-53(Al) particles and three variants (i.e., MIL-53(Al)–NH 2 , MIL-53(Al)–NO 2 , MIL-53(Al)–OH) into PEBA polymer matrix. These four MIL-53(Al) counterparts were synthesized via a microwave-assisted solvothermal method by selectively functionalizing the terephthalic acid linkers with different chemical groups. The functional MIL-53(Al) variants were employed to explore the relationship between membrane microstructures and PV performance by manipulating the interfacial interactions with PEBA matrix. The findings reveal that incorporating MIL-53(Al) variants not only displayed excellent interfacial compatibility and uniform dispersion within PEBA matrix, but also constructed the preferential transport pathways for n-butanol over water molecules. Impressively, in a 1 wt% n-butanol aqueous solution at 40 °C, the resultant membrane attained a permeation flux of 1483.3 g·m -2 ·h -1 and a separation factor of 18.1. Compared to the PEBA/PVDF membrane, the total flux was enhanced by 17.1 %, and the separation factor was improved by 46.4 %. Moreover, the embedding MIL-53(Al) variants boosted thermal and mechanical properties of the membrane, endowing it with considerable potential for practical applications.
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高影响因子
COMBUSTION SCIENCE AND TECHNOLOGY
·
2025
·
IF 1.5
Baichen Chen,Yi Wang,Jianchen He,Xiaolan Song,Chongwei An
This article uses a combination of experimental and simulation methods for mutual verification to explore the possibility of nano aluminum thermite damaging chips and disrupting circuit systems. In terms of experiments, Fe2O3/SiO2/Al and SnO2/SiO2/Al aluminum thermites were prepared by physically mixing micro Al powder, nano SiO2, and nano metal oxide powder in a certain proportion. The binder was added and pressed into a charge column for ignition testing. The prepared aluminum thermite was characterized and its performance was tested using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy(XPS), and constant pressure combustion experiments.In terms of molecular dynamics simulation, Materials Studio software was used to investigate the interaction relationships between atoms in the aluminum thermite. The reaction process and properties of the aluminum thermite under adiabatic conditions at different initial temperatures were explored from the perspectives of potential energy, radial distribution function, mean square displacement, and self diffusion coefficient. The simulation results were compared with experimental reaction phenomena. The results show that the aluminum thermite prepared by physical method is uniformly mixed, various materials are fully adhered, well dispersed, and there is no agglomeration phenomenon. In terms of combustion performance, the overall performance of Fe2O3/SiO2/Al thermite is better than that of SnO2/SiO2/Al thermite, with higher combustion efficiency, higher reaction temperature, and the ability to maintain high temperature for a longer period of time. The combustion of Fe2O3/SiO2/Al aluminum thermite is more complete, and the reaction generates more elemental Si, which plays a positive role in the damage of chips. In terms of molecular dynamics simulation, the aluminum thermal reaction of Fe2O3/SiO2/Al at different initial temperatures is more stable, with a faster energy release rate and a higher total energy content than SnO2/SiO2/Al. The aluminum thermal reaction generates oxides of elemental Fe/Sn, Si, and Al. Overall, the diffusion coefficients of both aluminum thermites increase with the increase of initial temperature, and the intensity of the reaction also increases with the increase of initial temperature. Temperature has an accelerating effect on their diffusion, and SnO2/SiO2/Al has stronger diffusion ability than Fe2O3/SiO2/Al. The Fe2O3/SiO2/Al aluminum thermite has a better damage effect on chips, and the simulation and experimental results are consistent.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Jian Wang,Yueyang Xu,Erjian Huang,Liming Kong,Jie Li,Yongping Zeng
The combustion of thiophene sulfides in fuel leads to the release of sulfur oxides (SO x ), which pose significant threats to both ecological systems and human health. Adsorption desulfurization has gained considerable attention from researchers due to its mild operating conditions, low production costs, and minimal impact on octane number. This study investigates the use of Cu-BTC as a platform for developing a novel adsorbent aimed at efficiently removing thiophenic compounds from fuel. Aluminum atoms were incorporated into the framework of Cu-BTC to create micro/mesoporous Al/Cu-BTC. Subsequently, the π-complexation adsorbent Al/Cu(I)-BTC, featuring Lewis acid sites, was synthesized through the in-situ reduction of Al/Cu-BTC using sodium thiosulfate. The adsorption properties of Al/Cu(I)-BTC for thiophene were assessed through both batch and breakthrough experiments. Al/Cu(I)-BTC-0.10(0.28) demonstrated exceptional adsorption performance. The static and dynamic adsorption capacities of thiophene at 500 and 200 ppm were 18.54 mg S/g and 9.49 mg S/g, respectively. Importantly, the adsorption capacity of Al/Cu(I)-BTC-0.10 (0.28) for thiophene in fuel containing 500 ppm sulfur remained at 15.45 mg S/g after six regeneration cycles. In the competitive adsorption of toluene, the adsorption capacity of the adsorbent for thiophene in the fuel containing 200 ppm sulfur was 7.84 mg S/g.
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DOI
PubMed
高影响因子
Arabian Journal of Chemistry
·
2015
·
IF 3.725
Shifeng Li,Yanming Shen,Min Xiao,Dongbin Liu,Lihui Fan
Controlled release formulations have been proven to have potential in overcoming the drawbacks of conventional plant growth regulators. Novel controlled-release formulation of β -naphthoxyacetic acid (BNOA) intercalated MgAl-layered double hydroxides (LDHs) was prepared by co-precipitation method. The effects of temperature, pH value, and release medium on BNOA release were studied and the releasing mechanisms were discussed. The results of release show that the increase of temperature induces the increase of BNOA release extent. The release rate and accumulated release amount of BNOA are found to be dependent to the anion in the aqueous solution in the order of CO 3 2− > SO 4 2− > Cl − . Moreover, the pH is the key controlling factor for the BNOA release processes, and with strong acid medium, the release character of BNOA is different from those at pH 7 and 12, which accompanies with fast collapse of LDHs nanolayered structure. The nanohybrid of BNOA intercalated LDHs possessed good controlled release properties and the BNOA release character from the nanohybrid fitted pseudo-second-order model in neutral medium.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2010
·
IF 3.083
Zhihong Zhu,Lining Qu,Yaqing Guo,Yan Zeng,Wei Sun,Xintang Huang
In this paper a Ni/Al layered double hydroxide (LDH) was first synthesized and further immobilized on a carbon ionic liquid electrode (CILE), which was prepared by using 1-(3-chlorine-2-hydroxypropyl)-3-methylimidazolium acetate as the modifier. The characteristics of LDH/CILE were investigated by scanning electron microscopy (SEM) and cyclic voltammetry . Under the selected conditions the LDH/CILE showed better electrochemical response towards the detection of dopamine (DA) than the CILE. The parameters of DA electro-oxidation on the LDH/CILE were calculated with the values of the electron transfer coefficient ( α ), the number of electrons transferred ( n ), the apparent heterogeneous electron transfer rate constant ( k s ) and the diffusion coefficient ( D ) as 0.426, 2.25, 1.66 s −1 and 7.06 × 10 −5 cm 2 /s, respectively. This modified electrode can be further used to detect DA content in the real drug samples.
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APPLIED CLAY SCIENCE
·
2022
·
IF 5.907
Tianqi Yuan,Miao Chen,Xiaotong Sun,Jianping Guan,Fawei Zhu,Kai Tang,Zhipeng Zhang,Qi Liu,Xiaoqing Chen
Designing chiral adsorption separation material with high enantioselectivity and stability is a promising route to realize the enantioselective recognition and separation of racemic molecules. Here, for the first time, camphor sulfonic acid derivatives (CSA) were synthesized as a chiral resolving agent, and it was modified on Mg/Al layered double hydroxide (Mg/Al-LDH) through electrostatic self-assembly to construct functionalized chiral adsorption separation material (CSA@LDH), which could be served as an adsorbent for enantioselective recognition and separation of propranolol enantiomers ( R,S -PRO). The CSA@LDH maintained the advantage of limited chiral space in layered structures to achieve the selective enrichment of R -PRO, and the e.e. % value of single separation could reach 19.5%. Meanwhile, density functional theory (DFT) calculations supported that chiral recognition and separation were ascribed to the discrepancy in affinities stemming from the difference of π-π interaction force and hydrogen bonding capacity of CSA with R,S -PRO. Hence, considering the superior ability of hydrogen bond coordination and stereocontrol of camphor sulfonic acid derivatives, it is expected to be more widely used as a chiral resolving agent for other enantiomeric recognition and separation.
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JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2020
·Vol. 29
·期 2
·1375-1383
·
IF 1.652
Yin Yanjun,Li Xueming
In this work, an Al/CuO energetic film with a porous hollow structure was obtained by electrophoretic deposition (EPD) from an aqueous solution at low field strengths of 20 V cm −2 instead of from organic solvents. CuO porous hollow microspheres (PHMSs) were prepared by a one-step hydrothermal method. The shape of the CuO PHMSs was very uniform at the macroscale with a size of 5 μm. To codeposit the species during the EPD process, the nano-Al particles and CuO PHMSs were modified with acrylic acid and citric acid, respectively. The nano-Al particles were deposited on the surface or in the interior of the CuO PHMSs by an electrical field and formed Al/CuO PHMS composites. The chemical composition, morphology, heat release and combustion of the as-prepared composite coating films were analyzed by XRD, FESEM, FT-IR, EDS, TG-DSC and with a high-speed camera. The heat release of the Al/CuO porous thermite reached 3804 J/g with excellent combustion performance due to the novel microstructure and appropriate modifications.
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