MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Caiqing Song,Qiaoling Shen,Linghui Hao,Meirou Jing,Shiquan Zhao,Lijun Bian
One-step co-hydrothermal synthesis of SnO₂ NPs@AC composite without tedious template procedures. • In-situ formed Sn O C interfacial bonds confirmed by XPS and Raman, enhancing charge transfer. • Uniform dispersion of SnO₂ nanoparticles (∼12 nm) on porous AC matrix, maximizing electroactive surface area. • Excellent dopamine sensing: LOD 21.6 nM, high sensitivity, good reproducibility, and recovery in serum. In this study, a SnO₂ nanoparticles@amorphous carbon (SnO₂ NPs@AC) composite was successfully synthesized via a facile co-hydrothermal method followed by high-temperature calcination, using glucose as the carbon precursor and SnCl₄ as the tin source. The structural and morphological properties of the as-prepared composites were systematically characterized. The results confirmed that the ultrafine SnO₂ NPs were uniformly dispersed and firmly anchored on the AC surface through in situ formed Sn O C chemical bonds, creating an intimately coupled heterointerface. Owing to this unique architecture, the SnO₂ NPs@AC-modified electrode exhibited excellent electrochemical sensing performance for dopamine (DA). Under optimized conditions, the sensor delivered a wide linear response in the range of 0.2–20 μM, a low detection limit of 2.16 × 10 −2 μM, and a high sensitivity of 1.33 μA·μM −1 . Moreover, the sensor demonstrated excellent selectivity against common interferents. When applied to real biological samples (fetal bovine serum), satisfactory recovery rates ranging from 97.7 to 100.9% were achieved. However, its long-term stability (∼60% retention after 10 days) remains a limitation that requires further improvement for practical applications. This study provides a simple and scalable strategy for constructing high-performance hybrid electrode materials through interfacial chemical bond engineering, with promising potential for biomedical sensing applications. Download: Download high-res image (90KB) Download: Download full-size image
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2026
·
IF 3.9
Xishuo She,Wei Luo,Yubin Wang,Yang Jin,Jianjun Chen,Li Wang,Jun Li,Ming Chen
In microfluidic chips, the geometric confinement arising from comparable droplet and electrode scales significantly distorts the local electric field, challenging the applicability of classical electrohydrodynamic theories. This study systematically investigates the dynamic evolution─deformation, oscillation, and breakup─of microdroplets within millimeter-scale confined AC electric fields. Crucially, experimental results reveal that the critical breakup field follows a scaling law of EC ∝ R–0.47, distinct from the classic Rayleigh prediction (R–0.5). This deviation is quantitatively attributed to the electric field distortion governed by the blockage ratio (χ). Based on this insight, a modified semiempirical prediction model is established, achieving high predictive accuracy (R2 = 0.997). Furthermore, this study investigates the effects of voltage, droplet size, surface tension, and viscosity. The mechanism of droplet oscillation is elucidated as being driven by a significant hydrodynamic phase lag (δ ≈ 80°) induced by high viscosity. This work not only reveals the failure mechanism of classical laws in confined geometries but also provides a robust theoretical foundation for the precise manipulation of droplets within microsystems.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2026
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IF 9.2
Bowen Zhang,Bingshuo Li,Tianhua Yang,Xingping Kai,Jian Wang,Rundong Li
As a clean energy source, hydrogen has attracted wide attention due to its advantages of renewability, high energy density and no pollution. Methanol has a hydrogen content of 12.6 wt%, which is an ideal source for H 2 production. In this study, FactSage software was used to simulate methanol aqueous phase reforming (APR) reaction for H 2 production. Thermodynamic analysis based on the Gibbs free energy minimization method indicated that methanol decomposition required a threshold temperature of 230−240 °C, which was also promoted the water gas shift (WGS) reaction. Based on the optimal H 2 production temperature obtained by simulation, the effect of methanol to water molar ratio on H 2 production was investigated. Under the optimal methanol to water molar ratio, the effects of reaction temperature and Ni/AC catalyst on H 2 production were investigated. It was found that the simulation results were consistent with the experimental results without catalyst under the condition of constant temperature and constant volume. At 240 °C, the methanol to water molar ratio of 4: 3 was beneficial to the forward WGS. The H 2 yield reached a peak of 41.9 mmol/L under the conditions of 240 °C, 10Ni/AC, methanol to water molar ratio of 6: 3 and reaction time of 1 h. Combined with density functional theory (DFT) calculation, the adsorption models of methanol and reaction intermediates (∗CH 2 O, ∗HCOOH) on the oxygen vacancy of C–O bond on Ni/AC were constructed. The mechanism of methanol APR, with methanol decomposition as the primary reaction and WGS as the secondary reaction, offers theoretical support for H 2 production from methanol APR.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Yueyang Wu,Yuling Lyu,Hai Yang,Kunlin Song,Zhuren Wu,Zirui Zhang
Appropriate electrical parameters are crucial for efficient dehydration. At the resonance frequency, the weakened interfacial film is prone to rupture, promoting droplet aggregation and enhancing dehydration efficiency. However, the theoretical mechanism of droplet resonance remains unclear. To elucidate the dynamic response mechanism of droplets in oil under an AC electric field, this paper analyzes the force on droplets under the electric field, deduces the frequency conditions for displacement resonance and velocity resonance, and explores the effects of droplet particle size, oil viscosity, interfacial tension, and electric field strength on the resonance frequency under the vertical electrodes. Results reveal a critical frequency that maximizes droplet deformation. Droplets experience electric, drag, and internal forces, and the resonance frequency is determined by the difference between the intrinsic frequency ( ω 0 ) and oil damping. The resonance frequency decreases by about 0.99 times when the droplet radius increases by 1.6 times. The maximum deformation reaches 0.14 at an interfacial tension of 4.9 mN·m −1 . At resonance, the droplet deformation stabilizes at a high value of 0.0498 when the viscosity is 100 mPa·s, whereas viscosities above a critical value induce delayed deformation and lower stabilized values. Higher voltages accelerate deformation. These findings provide a theoretical basis for optimizing electrical parameters and improving dehydration efficiency in water-in-oil emulsions.
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SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Kailiang Zhang,Chen Cai,Haizhen Sun,Yupan Wu,Zhijie Xie
Controllable fluid concentration regulation is significant for numerous applications, including cell culture, material synthesis and protein crystallization. However, current methodologies are confined by intricate fluidic networks, specialized chip fabrication and manipulation equipment, as well as limited and inflexible manipulation capabilities. In this study, we introduce a novel approach for efficient droplet concentration modulation utilizing AC electrothermal (ACET) flow. The designed microfluidic device comprises two functional units: a fluid mixing zone and a droplet generation region. The fluid mixing zone features an electrode array positioned at the microchannel's bottom, configured in an asymmetrical layout to induce robust ACET flow. When two aqueous solutions with different concentrations are introduced into the device through separate inlets, they undergo mixing to achieve the desired concentrations in the main channel due to the stirring of ACET flow first and encapsulated into dispersed droplets by the shear force of the oil phase afterwards. The droplet concentrations can be dynamically adjusted by modulating the driving voltage, signal frequency and inlet flow rates. The versatility of this technique is validated through the successful fabrication of phenolphthalein crystal particles under different fluid concentrations. Therefore, this research holds significant promise for a wide range of applications requiring droplet concentration manipulation.
研究领域:
微流控技术
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生物医学工程
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药学
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流体力学
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Processes
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2025
·Vol. 13
·期 4
·1054
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IF 2.8
Sumita,Jibran Ali Ghumro,Jingzhen Su,Cong Li,Zhengming He,Jieming Yuan
This study investigates the activation mechanisms of hydrogen peroxide (H2O2) using iron-activated carbon (Fe2+/H2O2/AC) for the efficient degradation of amoxicillin (AM) in wastewater. The system achieved a high degradation efficiency of 90% under alkaline conditions (pH 9), with singlet oxygen (1O2) and hydroxyl radicals (•OH) identified as the dominant reactive species through scavenger experiments. High-performance liquid chromatography–mass spectrometry (HPLC-MS) analysis revealed degradation by-products and proposed reaction pathways, including the loss of amine groups, ring-opening oxidation, and bond cleavage. The structural and morphological properties of Fe2+/H2O2/AC were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) analysis. The BET surface area of Fe2+/H2O2/AC was determined to be 128.36 m2/g, with a mesoporous structure facilitating efficient mass transfer and adsorption. The system was systematically evaluated under varying conditions, including H2O2concentration (25–250 mg/L), catalyst dosage (0.05–1.0 mg/L), and pH (3–10). Kinetic analysis revealed that the degradation process follows pseudo-second-order kinetics (R2= 0.966), while adsorption isotherms were best described by the Langmuir model (R2= 0.98). Ecotoxicity tests indicated that the degradation products are less harmful to aquatic organisms. The system demonstrated excellent stability over three consecutive cycles, highlighting its potential for long-term application in treating pharmaceutical-contaminated wastewater.
研究领域:
环境科学
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化学工程
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高影响因子
ELECTROCHIMICA ACTA
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2019
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IF 5.383
Xiaoyu Zhao,Guangyu Li,Minghui Feng,Yanfei Wang
Compared to traditional extraction of lithium using solar evaporation, the electrochemical extraction is advantageous in many aspects, including elevated efficiency, superior selectivity, and low environmental pollution. In this study, LiNi 0·038 Mo 0·012 Mn 1·95 O 4 (LNMMO) with good lattice structure and nano morphology was successfully prepared and confirmed by XRD (X-ray diffraction), SEM-Mapping (scanning electron microscope mapping), SEM (scanning electron microscope), and EDX (Energy-dispersive X-ray spectroscopy) analyses. The pairing of LNMMO with activated carbon (AC) yielded obvious cost-effective and environmentally friendly composite when compared to conventional Noble metals used for battery anodes, such as Ag and Pt. A hybrid supercapacitor was assembled using delithiated LNMMO cathode (NMMO) and AC anode to form NMMO/AC. The cell showed high capacity, high rate performance, and excellent cyclic stability. A continuous flow NMMO/AC hybrid supercapacitor (CF-NMMO/AC) was developed for selective capture of Li + in aqueous solution by combining NMMO/AC hybrid supercapacitor with self-designed continuous flow control system. The device delivered high Li + extraction efficiencies reaching 14.4 mg/g per one cycle in simulated brine by consuming only 7.91 W h/mol Li + . The overall process produced 97.2％ Li + in simulated brine at optimized operating conditions. Overall, CF-NMMO/AC system provided higher efficiency, superior selectivity, and moderate energy utilization for Li + recovery from brine.
研究领域:
电化学
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环境科学
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材料科学
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能源工程
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分离科学
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可持续技术
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高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2013
·Vol. 131
·期 3
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IF 1.395
Ting Li,Yuan Ren,Chaohai Wei
Polyvinyl alcohol(PVA) bead crosslinked with boric acid has been widely utilized as a microorganism immobilization carrier. However, it has some disadvantages such as drastic cell viability loss, small adsorption capacity and mass transfer limitation. To improve upon these drawbacks, a new method to prepare PVA composite pieces with the addition of activated carbon (AC) and poly-3-hydroxybutyrate(PHB) was explored through a combination of freezing/thawing and the boric acid method and by using Tween-80 to improve the mass transfer performance of hydrophobic organics. m -Cresol and pyrene were used as representative compounds with benzene ring structures to model hydrophilic and hydrophobic organics in order to test the performance of PVA pieces. The results showed that, compared with the boric acid method alone, a combination of freezing/thawing and the boric acid method led to a decrease in total organic carbon(TOC) loss from 0.315 g g −1 to 0.033 g g −1 and increased the oxygen uptake rate(OUR) of microorganisms from 0.03 mg L −1 ·min −1 to 0.22 mg L −1 min −1 . The m -cresol equilibrium adsorption amount of the PVA-SA(sodium alginate)-PHB-AC piece was 2.80 times that of the PVA-SA piece. The diffusion coefficient of pyrene in the PVA-SA-PHB-AC piece increased from 0.53×10 −9 m 2 min −1 to 2.30×10 −9 m 2 min −1 with increasing concentrations of Tween-80 from 1000 mg L −1 to 5000 mg L −1 . The PVA-SA-PHB-AC composite carrier demonstrated great scope for immobilizing microorganisms for practical wastewater bio-treatment. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39837.
研究领域:
环境科学
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生物工程
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高影响因子
FUEL PROCESSING TECHNOLOGY
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2019
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IF 4.507
Tao Xie,Jing-Pei Cao,Chen Zhu,Xiao-Yan Zhao,Ming Zhao,Yun-Peng Zhao,Xian-Yong Wei
Selectively cleaving the C O bonds in lignin to produce aromatic products are challenging problems. Currently, catalytic hydrogenolysis of C O bonds in lignin requires harsh conditions. Herein, selectively cleaving C O bond of benzyl phenyl ether (BPE) was studied over Pd/AC, Ru/AC and Ni/AC. Among these catalysts, Pd/AC efficiently cleaved C O bond in BPE under super mild conditions (25 °C, 2 h and 0.1 MPa H 2 ). The products were toluene and phenol without hydrogenation of the aromatic ring . The main competitive step of hydrogenolysis and hydrogenation is sensitive to reaction temperature over Pd catalyst. A mild temperature is preferred for hydrogenolysis, since the H species nearby the oxygen atom are more strongly adsorbed than nearby the benzene rings . With the different H-donor solvents, the highest conversion of BPE was obtained in isopropanol. Based on the experiments, the reactions occurred via cleavage of the C aliphatic -O bond in BPE and the synergetic effects between the H from absorbed H 2 on the surface of the Pd and the intermediates radicals of benzyl and phenoxy should be the key points to such an optimum result.
研究领域:
化学工程
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催化科学
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
·
IF 3.141
Zihao Zhang,Zhe Chen,Xin Gou,Hao Chen,Kequan Chen,Xiuyang Lu,Pingkai Ouyang,Jie Fu
Ni/AC (nickel on active carbon) catalysts with different Ni loadings were synthesized and studied for the decarboxylation and aromatization of oleic acid in the absence of H2 or hydrogen donors. Without the use of hydrogen source, the whole deoxygenation process became more economical. Moreover, oleic acid can be saturated using the H2 derived from the production of aromatics, which were also considered as the critical component in aviation biofuels. The structure and properties of the catalysts were investigated using X-ray diffraction, transmission electron microscopy, and temperature-programmed desorption of CH3COOH and CO. The experimental and characterization results revealed that 30% Ni/AC had a higher adsorption capacity of CH3COOH among the other Ni/AC catalysts and highly dispersed and small Ni particles, providing a heptadecane yield of 40.7%. It also contained 13.8% aromatics, which fulfills the requirement of aviation fuels. This Ni/AC catalyst showed good stability even after being reused thrice.
研究领域:
催化化学
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可再生能源
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材料科学
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Hang-bo Zheng,Yuan-li Wang,Pei Zhang,Feng Ma,Peng-zhao Gao,Wen-ming Guo,Hang Qin,Xiao-pan Liu,Han-ning Xiao
The slow kinetics of Oxygen evolution reaction (OER) restricts the large-scale application of water electrolysis technology . It is reported that magnetic field can improve OER activity, but it is not clear how the AC magnetic field affects OER. Here, a series of NiCoFe-MOF-74 are reported, and it is found AC magnetic field can significantly enhance the alkaline OER activity at low current densities, but reduce the alkaline OER activity at high current densities, due to spin conservation, MHD effect, and induced electric field induced by AC magnetic field. In particular, when an AC magnetic field of 5.184 mT is applied, the overpotential at 10 mA cm −2 of NiCoFe-MOF-74 and carbon paper was reduced by 36.7% and 17.6%, respectively, but the overpotential at 40 mA cm −2 increased by 27.8% and 39.9%, respectively. This discovery provides a promising strategy for introducing an AC magnetic field to adjust the process of electrocatalytic reactions.
研究领域:
电化学
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材料科学
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催化反应
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高影响因子
JOURNAL OF POWER SOURCES
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2020
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IF 8.247
Ze Wang,Jiantuo Gan,Xiaodong Liu,Hangbo Shi,Qi Wei,Qiugui Zeng,Liang Qiao,Yonghao Zheng
All-inorganic cesium lead halide perovskites (CsPbX 3 , X = Cl, I, Br) have attracted great attention for developing high-performance photovoltaics due to their superb thermal stability. However, the short electron-hole diffusion lengths ( L D s) in CsPbI 2 Br perovskite are the primary limiting factor for further improvement of the power conversion efficiencies (PCEs) of the CsPbI 2 Br solar cells. Herein, a simple yet effective method is reported to prolong the L D s in CsPbI 2 Br via codoping of Zn 2+ and acetate (Ac − ) ions (i.e., using Zn(Ac) 2 as dopant). It is demonstrated that Zn 2+ partially replaces Pb 2+ to form a more stable black phase, and Ac − coordinates with Pb 2+ to passivate the defects at the perovskite grain boundaries which reduces electron-hole recombination within the perovskite. As a result, the L D s of Zn(Ac) 2 doped CsPbI 2 Br are greater than 1 μm, which is the first report on all-inorganic perovskites. The champion PCE of the CsPbI 2 Br solar cells is drastically increased from 12.31% to 14.93% upon doping with Zn(Ac) 2 , stemming mainly from the increased open-circuit voltage and fill factor. Furthermore, the non-encapsulated devices with Zn(Ac) 2 doped CsPbI 2 Br show less than 10% efficiency loss after storage in dry air for 30 days.
研究领域:
材料科学
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光伏技术
·
化学工程
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高影响因子
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