INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
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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.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Xueying Wu,Yanting Tian,Zhanfeng Li,Yuan Li,Jiping Zhu,Lei Wang
Solid oxide cells (SOCs) have attracted wide attention as highly efficient energy transfer devices between hydrogen and electricity. A Ca(OH) 2 nanoparticles modified Ca 3 Co 4 O 9+δ (CCO) hetero-structured oxygen electrode is obtained from the non-stoichiometric Ca 3.5 Co 4 O 9+δ (C35CO) in this work. By annealing at 850 °C in air, excessive Ca cations in C35CO are exsolved from oxide lattice to maintain the thermodynamically stable and forms homogeneously dispersed CaO nanoparticles on the surface. CaO is subsequently converted into Ca(OH) 2 by hydration reaction. The novel C35CO electrode contributes to greatly improved electrochemical kinetics with a polarization resistance of 0.07 Ω cm 2 at 800 °C, surpassing many results of the reported CCO catalysts. Such enhancement is based on the promoted oxygen vacancy concentration that significantly boosts the chemical adsorption and surface reaction kinetics of O 2 . This work validates that the highly active and durable oxygen electrode of non-stoichiometric layered cobaltite is promising in applications of ceramic fuel cells and electrolysis cells.
研究领域:
能源材料
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电化学
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陶瓷燃料电池
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DOI
高影响因子
ACS Omega
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2025
·
IF 4.3
Luna Wang,Yan Gong,Yanming Miao,Zhifeng Zhang
To support the development of a low-carbon economy and contribute to the achievement of carbon neutrality, this study synthesized bifunctional zeolitic imidazolate framework-8-based nanozymes (ZNZs) with dual functionality: CO2 adsorption and carbonic anhydrase (CA)-mimetic catalytic activity. The influence of ZNZs at varying concentrations on the growth rate of microalgae, chlorophyll and carbohydrate content, and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and CA activity were explored. Results indicated that after the addition of 5 mg/L ZNZs, the growth rate of microalgae increased by 7%. Furthermore, the maximum chlorophyll and carbohydrate contents reached 4.55 and 43.59 mg/L, respectively, which were 12.6 and 4.2% higher than those in the control group. Additionally, Rubisco and CA activity (intra- and extracellular) increased by up to 21.26, 10, and 8.3%, respectively. These findings demonstrate that ZNZs enhance the photosynthetic efficiency of microalgae and increase microalgae’s affinity for CO2, highlighting their promise as a strategy for improving carbon capture and sustainable bioenergy production.
研究领域:
环境科学
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纳米技术
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生物技术
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生物化学
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气候变化缓解
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DOI
PubMed
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
·
2018
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IF 3.849
Jie Gao,Lizhe Yang,Yingying Liu,Fengli Shao,Qianjiahua Liao,Jingge Shang
Nano scale zerovalent iron (nZVI) used in waste water treatment can be more effective when modified with sulfur. In this study, we synthesized biochar-supported sulfide-modified nZVI (S-nZVI/BC) and characterized it using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. Our results reveal that sulfidation resulted in the formation of FeS on the surface of S-nZVI/BC. The Cr(VI) removal efficiency and capacity of the above composite were investigated as a function of initial solution pH/Cr(VI) concentration, reaction time, and presence of background ions (Ca 2+ and SO 4 2– ). Batch experiments revealed that solution pH had a significant impact on Cr(VI) removal capacities, with the maximum observed at pH 2.5. From a kinetic viewpoint, Cr(VI) removal was best described by a pseudo-second-order model. Importantly, the scavenger reaction was significantly promoted in the presence of SO 4 2– , being slightly inhibited by Ca 2+ and dissolved oxygen. Thus, the sulfidised nanohybrids exhibited excellent Cr(VI) removal performance, being well suited to the remediation of Cr(VI)-polluted water.
研究领域:
环境科学
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材料科学
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水处理
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Ling Liu,Yanbo Li,Man Xu,Cunwen Wang
Two-dimensional Co ultrathin metal–organic framework nanosheets (Co-UMOFNs) were synthesized and blended into poly (ether block amide) (PEBA) to prepare composite mixed matrix membranes on PVDF supports for the pervaporation of phenol aqueous solution. The membranes were characterized by XRD, ATR-IR, TGA, CA and SEM measurements. Effects of the Co-UMOFNs loading, feed temperature and feed concentration on phenol separation performance were investigated. The results showed that Co-UMOFNs have a two-dimensional layered morphology and have good compatibility with the PEBA. A “brick and mortar” architecture morphology was achieved after incorporating Co-UMOFNs into the PEBA membrane. The amorphous PE segments in the PEBA were turned into a crystalline structure, restricting the motion of PE segments. The filling of Co-UMOFNs slightly improved the thermal stability and hydrophobicity as well. With the increase of the Co-UMOFNs loading from 0% to 40%, the phenol separation factor increased from 27 to 45, and the total flux decreased from 1.2 kg m -2 h - 1 to 0.42 kg m -2 h - 1 , when separation of 1000 ppm phenol solution at 70 °C. The interlayer galleries induced by the Co-UMOFNs stacking increased the tortuosity, and the crystalline structure of the Co-UMOFNs-PEBA improved the energy barriers of water penetration. Therefore the water flux was inhibited and the phenol separation factor increased. Depression of water permeation can be another protocol to prepare high-performance organophilic pervaporation membranes.
研究领域:
材料科学
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化学工程
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膜技术
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2024
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IF 3.8
Shen Liyue,Peng Tao,Dong Jiahui,Liang Zhanwei,Si Jihao,Ye Hua,Xie Jie,Yu Xiaoping,Dai Xinhua
Biomarkers screening is a benefit approach for early diagnosis of major diseases. In this study, magnetic nanoparticles (MNPs) have been utilized as labels to establish a multi-line immunochromatography (MNP-MLIC) for simultaneous detection of carcinoembryonic antigen (CEA), carbohydrate antigen 199 (CA 19–9), and alpha-fetoprotein (AFP) in a single serum sample. Under the optimal parameters, the three biomarkers can be rapidly and simultaneously qualitative screening within 15 min by naked eye. As for quantitative detection, the MNP-MLIC test strips were precisely positioned and captured by a smartphone, and signals on the test and control lines were extracted by ImageJ software. The signal ratio of test and control lines has been calculated and used to plot quantitative standard curves with the logarithmic concentration, of which the correlation coefficients are more than 0.99, and the limit of detection for CEA, CA 19–9, and AFP were 0.60 ng/mL, 1.21 U/mL, and 0.93 ng/mL, respectively. The recoveries of blank serum were 75.0 ~ 112.5% with the relative standard deviation ranging from 2.5 to 15.3%, and the specificity investigation demonstrated that the MNP-MLIC is highly specific to the three biomarkers. In conclusion, the developed MNP-MLIC offers a rapid, simple, accurate, and highly specific method for simultaneously detecting multiple biomarkers in serum samples, which provides an efficient and accurate approach for the early diagnosis of diseases. Graphical Abstract
研究领域:
医学诊断
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纳米技术
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生物标志物筛查
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即时检测
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
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IF 6.3
Hao-Kai Lou,Peng-Fei Qian,Ze-Long Bao,Zhi-Liang Liu,Cheng-Yu Liu,Yu-Long Guo,Tian-Li Wang,Chun-Hao Chang,Wen-Hao Geng,Hong-Zhang Geng
Flexible and transparent conductive films are extensively employed in window defogging, wearable physiotherapy devices, transparent electrodes, electromagnetic interference shielding, flexible displays, etc. Though silver nanowires (AgNWs) and low-dimensional carbons (e.g., CNTs) and Ti₃C₂Tₓ MXene accelerate field development, persistent challenges such as CNTs dispersion instability and AgNWs oxidation susceptibility limit practical implementation. This study designed a multilayer composite film on PET: a cross-network conductive layer of AgNWs and citric acid-modified single-walled carbon nanotubes (CA-SWCNTs), encapsulated by an aluminum-doped zinc oxide (AZO) protective layer via sol-gel method. AgNWs with high aspect ratio (average diameter 74 nm, length 53 μm) were synthesized by polyol method as the conductive backbone. CA-SWCNTs enhanced hydrophilicity and interfacial bonding, forming a stable conductive/thermal network. By suppressing oxidation and reflection, the AZO encapsulation layer increased the transmittance at 550 nm from 81.3 % to 82.1 % while maintaining a low sheet resistance of 5.4 Ω/sq. The composite films delivered an EMI shielding efficiency of 28.9 dB (8.2 GHz), achieved rapid Joule heating to 120 °C within 90 s at 7 V, demonstrated robust stability over 5500 s of cyclic operation, and exhibited environmental endurance with merely 19.9 % sheet resistance increase after 480 h air exposure as well as a 22.1 % increase after 100 cycles of tape peeling tests. This work provides an innovative strategy for multifunctional flexible transparent devices.
研究领域:
材料科学
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纳米技术
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柔性电子学
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电磁干扰屏蔽
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能量转换与热管理
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DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Huan He,Yixin Liu,Qiuyun Chai,Xiaofang Ma,Chaochao Lai,Ziwei Guo,Guoli Dong,Bin Huang,Xuejun Pan
Conventional plastic waste management through landfilling and incineration not only consumes vast land resources but also emits hazardous compounds, severely endangering ecosystems. An emergent and promising solution is the conversion of this waste into functional carbon-based materials for water purification, enabling sustainable reuse. Herein, four kinds of plastics were pyrolyzed to char doped with Fe and Ca for peroxymonosulfate (PMS) activation to degrade bisphenol A (BPA). The doped char exhibited highly effective adsorption and catalytic capabilities for BPA removal. Fe-doping enhanced the adsorptive removal of BPA by increasing the specific surface area and adsorption sites of the char. The Fe/Ca co-doped catalyst achieved 94.1 % BPA removal within 10 min, while the Ca components effectively reduced post-reaction SO 4 2- accumulation, mitigating secondary ionic pollution. Quenching experiments and EPR analyses confirmed the generation of SO 4 – ·, ·OH, ·O 2 – and 1 O 2 , indicating the coexistence of radical and non-radical oxidation pathways. Moreover, the waste-plastic-derived char with Fe/Ca also exhibited a high BPA removal efficiency of 81.2 %, and the residual toxicity of BPA was markedly reduced after degradation. This study proposes a novel strategy that synergistically combines resource recycling with pollutant removal.
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PLoS One
·
2025
·Vol. 20
·期 11
·e0337183
·
IF 2.6
Guang-Hui Zhuo,Dong-Xin Xue,Long-Fei Huang,Qi Wang,Guangcan Zhu,Chu-Ya Wang
Efficient recovery of phosphate from wastewater is required due to phosphorus (P) pollution and resource scarcity. In this study, a Ca-modified biochar (ESBC-1) was developed to enhance phosphate adsorption by co-pyrolysis of digestate from anaerobic fermentation and waste eggshell (1:1 mass ratio) at 700 °C. Under ideal conditions (1 g/L, pH 3–10), ESBC-1’s adsorption capacity fluctuates by less than 8% within this pH range, exhibiting excellent pH adaptability, and the phosphate adsorption capacity of ESBC-1 was 97.74 mg/g, which was 7.9 times higher than that of unmodified biochar (SBC). The effect of common cations (Na ⁺ , K ⁺ , Mg 2 ⁺ , Ca 2 ⁺) and anions (Cl ⁻ , SO₄ 2 ⁻) on the adsorption was small, but due to competitive binding and pH, CO₃ 2 ⁻ and HCO₃ ⁻ inhibited the adsorption substantially. The process followed the pseudo-second-order kinetic model (R 2 = 0.9988), which indicates that chemical adsorption is the rate-limiting step, and Freundlich isotherm model (R 2 = 0.9763), which reflects heterogeneous adsorption sites on the ESBC-1 surface. At 298 K, the maximum Langmuir adsorption capacity is 529.10 mg/g, while that of SBC is only 287.72 mg/g — this confirms the significant promotion effect of Ca modification. According to characterization (SEM-EDS, FTIR, XRD, XPS), adsorption mostly happened by chemical precipitation, where surface Ca 2 ⁺ was hydrolyzed from Ca(OH)₂ and combined with phosphate to form insoluble hydroxyapatite (Ca₅(PO₄)₃OH). In the actual biogas (TP = 24.49 mg/L, pH = 8.64), ESBC-1 was used at a dosage of 8 g/L, and phosphate removal rate reached 75.23%. This work demonstrated a sustainable “waste resource utilization-pollution control” strategy by converting sludge and eggshell into an effective phosphate adsorbent, suggesting a new way to address the problems of waste valorization and eutrophication.
研究领域:
环境科学
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化学工程
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废水处理
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材料科学
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可持续资源利用
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Qu Ai,Shi-Kuan Sun,Yu Tian,Wei-Dong Xiao,Yi Zhao,Sheng-Heng Tan,Wei-Ming Guo,Hua-Tay Lin
For the sustainable development of nuclear energy, the fabrication of durable nuclear wasteforms, especially for high-level radioactive waste, is essential. This study introduces entropy engineering into zirconolite ceramics for the first time. A series of entropy-stabilized zirconolite ceramics with the general formula Ca( Zr , Hf , Sn ) x Ti 3-x O 7 (x = 0.8–2.2) were synthesized via cold-press sintering at 1450 °C for 10 h. The influence of multi-principal cation substitution on phase assemblage, microstructure, and chemical durability was systematically investigated. The incorporation of Zr, Hf, and Sn led to refined grain sizes, attributed to entropy-induced grain boundary pinning and lattice distortion. At x = 0.8, significant secondary phases including rutile and perovskite were observed. As the substitution level increased, these impurity phases were progressively suppressed, and phase-pure zirconolite was obtained at x = 1.8 and 2.0, as confirmed by XRD, although SEM still revealed trace perovskite. At x = 2.2, the reappearance of perovskite and formation of Hf-enriched zirconolite domains indicated the limit of solid solution stability. Raman and high-resolution TEM confirmed the 2 M zirconolite structure, accompanied by pronounced lattice distortion and stacking faults. Static leaching tests conducted in 1 M HCl revealed that samples with intermediate substitution levels (x = 1.2, 1.6, and 2.0) exhibited significantly improved chemical durability, with calcium release rates of 4.54 × 10 −4 , 2.79 × 10 −4 , and 1.14 × 10 −4 g·m −2 ·d −1 , respectively—an order of magnitude lower than that of conventional zirconolite (1.4 × 10 −3 g·m −2 ·d −1 ). The leaching rates of Zr, Hf, Sn, and Ti remained within the range of 10 −6 –10 −4 g·m −2 ·d −1 across all samples. These results demonstrate that entropy stabilization enhances phase purity, structural stability, and acid resistance, making entropy-stabilized zirconolite a promising matrix material for the immobilization of high-level radioactive waste.
研究领域:
材料科学
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核工程
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陶瓷学
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废物处理
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固态化学
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高影响因子
MATERIALS SCIENCE FORUM
·
2015
·
IF 0
Xiao Peng Xu,Si Chen,Yan Qin Shi,Bo Zhen Wu,Meng Ma,Xu Wang
The effect of orotic acid (OA) and its mixtures with calcium stearate (CaSt2) and zinc stearate (ZnSt2) in various ratios on the thermal stability of PVC has been investigated by Congo red and discoloration tests. The results shows that OA acts as a long-term thermal stabilizer for PVC like CaSt2, and the combination of OA and ZnSt2 exhibited a synergistic stabilization effect at a certain ratio. This is due to the ability of OA to absorb HCl released during the degradation of PVC to diminish its catalytic effects, and react with ZnCl2 to stop its catalytic effect for PVC. CaSt2-ZnSt2/OA stabilizers exhibit good synergistic effects with both acceptable initial color and long-term stability for PVC
研究领域:
材料科学
·
化学工程
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DOI
Frontiers in Chemistry
·
2017
·
IF 3.994
Yu Xiaopeng,Mi Xueyang,He Zhihui,Meng Minjia,Li Hongji,Yan Yongsheng
Highly selective cellulose acetate (CA)/poly (vinyl alcohol) (PVA)/titanium dioxide (TiO2) imprinted membranes were synthesized by phase inversion and dip coating technique. The CA blend imprinted membrane was synthesized by phase inversion technique with CA as membrane matrix, polyethyleneimine (PEI) as the functional polymer, and the salicylic acid (SA) as the template molecule. The CA/PVA/TiO2 imprinted membranes were synthesized by dip coating of CA blend imprinted membrane in PVA and different concentration (0.05, 0.1, 0.2, 0.4 wt %) of TiO2 nanoparticles aqueous solution. The SEM analysis showed that the surface morphology of membrane was strongly influenced by the concentration of TiO2 nanoparticles. Compared with CA/PVA-TiO2(0.05, 0.1, 0.2%)-MIM, the CA/PVA-TiO2(0.4%)-MIM possessed higher membrane flux, kinetic equilibrium adsorption amount, binding capacity and better selectivity for SA. It was found that the pseudo-second-order kinetic model was studied to describe the kinetic of CA/PVA-TiO2(0.2%)-MIM judging by multiple regression analysis. Adsorption isotherm analysis indicated that the maximum adsorption capacity for SA were 24.43 mg g−1. Moreover, the selectivity coefficients of CA/PVA-TiO2 (0.2%)-MIM for SA relative to p-hydroxybenzoic acid (p-HB) and methyl salicylate (MS) were 3.87 and 3.55, respectively.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）