CELLULOSE
·
2019
·Vol. 26
·期 10
·6241-6258
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IF 3.917
Garba Zaharaddeen N.,Zhou Weiming,Lawan Ibrahim,Zhang Mingxi,Yuan Zhanhui
In this work, we incorporated Cu 2+ on to microcrystalline cellulose (MCC) powder by a simple synthesis method to produce a composite material (Cu-MCC) with its suitability in prometryn (Pr) adsorption tested from synthetic wastewater. Various characterization techniques were applied in studying the prepared Cu-MCC with response surface methodology applied in order to study the influence of adsorbent dosage, solution pH and shaking speed, which suggested a quadratic model for the response (Pr percentage removal). The optimum adsorption conditions obtained were adsorbent dosage of 0.40 g, solution pH of 11 and shaking speed of 215 rpm with the model adequacy and significance validated by ANOVA. Langmuir and pseudo-second order were the most appropriate models in describing the generated equilibrium and kinetic data, giving rise to a monolayer adsorption capacity value of 97.80 mg/g at room temperature. The desorption of Pr on Cu-MCC was also probed depicting the adsorption capacity to be about 66.7% of its initial value after six sequential adsorption–desorption cycles. Overall, the prepared Cu-MCC was revealed to have great potential for being a good adsorbent in the removal of water contaminants such as Pr, based on the obtained results. Graphic abstract
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CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Liang Chen,Dongmei Luo,Zhenghao Wang,Kejing Wu,Lei Song,Hongjiao Li,Shan Zhong,Siyang Tang,Bin Liang
Chemical looping hydrogen generation (CLHG) offers a promising solution for producing H 2 from industrial off-gas, such as blast furnace gas. However, increasing H 2 production capacity of the oxygen carrier (OC) at moderate temperature remains a significant challenge. In this study, a novel Cu-Fe-based OC is tailored for moderate-temperature CLHG from blast furnace gas. The results demonstrates that the tailored OC exhibits a superior H 2 production capacity of 12.99 mmol·g −1 at 550 °C, which is 6.5 times higher than that of Fe 2 O 3 at the same temperature. The addition of Cu leads to the formation of oxygen defects, which facilitate the migration of lattice oxygen, thereby the activity of the OC is enhanced. Furthermore, cyclical experiments demonstrates that O 2 -assisted regeneration strategy can effectively suppress the segregation of Cu during the cycling process, and the tailored OC shows good stability during 10 redox cycles. No additional separation process was required and the purity of the hydrogen was higher than 99%. The findings here open a new avenue for efficient CLHG from industrial off-gas at moderate operation temperature.
研究领域:
能源化学
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材料科学
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化学工程
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工业气体利用
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氢能技术
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 46
·102880-102893
·
IF 5.8
Li Yunhe,Li Hao,Zhao Baogang,Ma Yanming,Liang Peiyuan,Sun Tianjun
The escalating levels of surface ozone concentration pose detrimental effects on public health and the environment. Catalytic decomposition presents an optimal solution for surface ozone removal. Nevertheless, catalyst still encounters challenges such as poisoning and deactivation in the high humidity environment. The influence of support on catalytic ozone decomposition was examined at a gas hourly space velocity of 300 L·g −1 ·h −1 and 85% relative humidity under ambient temperature using Cu-Mn–doped oxide catalysts synthesized via a straightforward coprecipitation method. Notably, the Cu-Mn/SiO 2 catalyst exhibited remarkable performance on ozone decomposition, achieving 98% ozone conversion and stability for 10 h. Further characterization analysis indicated that the catalyst’s enhanced water resistance and activity could be attributed to factors such as an increased number of active sites, a large surface area, abundant active oxygen species, and a lower Mn oxidation state. The catalytic environment created by mixed oxides can offer a clearer understanding of their synergistic effects on catalytic ozone decomposition, providing significant insights into the development of water-resistant catalysts with superior performance. Graphical
研究领域:
环境催化
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大气污染控制
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材料化学
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表面科学
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催化化学
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环境工程
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功能材料
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Heping Xie,Shuo Zhai,Tao Liu,Hailong Liao,Yuan Zhang,Wei Zhou,Zongping Shao,Meng Ni,Bin Chen
The hybrid direct coal fuel cell (HDCFC) is a promising technology for the generation of power using coal, which is abundant and cheap. However, restricted contact between the solid carbon in the coal and the anode of the cell not only limits the electrochemical oxidation sites, but also adversely affects the transport of electrons and ions. Herein, we demonstrate a new strategy of using Cu-modified Ni foams as the three-dimensional outer anode for a high-performance HDCFC with 3D structure, that is rich in electrochemical reaction sites and beneficial for electron and ion transport when filled with molten carbonates and anthracite coal. Moreover, the CuNi alloy layer formed on the surface of Ni foam is of excellent coking-resistance and capable of preventing ash-clogging, therefore effectively promoting the durability of an electrolyte-supported HDCFC. An excellent maximum power density of 378 mW cm −2 at 750 °C is achieved using the prepared 3D anode with anthracite coal as fuel. Besides, the cell exhibited stable operation for more than 13 h at 100 mA cm −2 , promising a new electrode design strategy for developing high-performance HDCFC anodes.
研究领域:
能源材料
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燃料电池技术
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电化学工程
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洁净煤技术
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高影响因子
Catalysis Science & Technology
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2026
·
IF 4.2
Yujie Guo,Chengjie Li,Wenhui Zhang,Ruifang Liu,Xueli Du,Zhen Liu,Ying Zhang,Zi-Feng Yan
Atmospheric CO 2 concentrations are increasing rapidly, posing severe environmental challenges. Hydrogenation of CO 2 to methanol represents a promising strategy to reduce the content of CO 2 . While Cu-based catalysts have garnered significant attention, there are still problems such as low selectivity for methanol and poor stability. In this study, a highly dispersed Cu/ZnO-ZrO 2 catalyst was synthesized via a formamide-assisted co-precipitation method. Investigation of the ZrO 2 loading revealed that the Cu/ZnO-25%ZrO 2 catalyst exhibited optimal performance for CO 2 hydrogenation to methanol, achieving a CO 2 conversion of 6.7%, methanol selectivity of 85%, and a methanol space-time yield (STY) of 586.5 g MeOH •kg cat -1 •h -1 . The results demonstrate a strong interaction between Cu and the ZnO-25%ZrO 2 support surface, which predominantly stabilizes Cu in the Cu + state. Notably, these Cu + species remain stable even after reduction and reaction. This interaction not only ensures high catalytic activity but also confers excellent stability to the catalyst, as evidenced by the absence of deactivation over a 200-hour stability test.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Mengyu Wang,Shuhan Zhang,Chaoyue Meng,Fenglei Han
To enhance the conversion efficiency and product selectivity in CO2 hydrogenation to methanol, we prepared a series of Cu–Fe bimetallic catalysts with varied Cu/Fe ratios supported on HZSM-5 by an initial impregnation method and evaluated them in a dielectric barrier discharge (DBD) nonthermal plasma reactor. Among these, the Cu7Fe3/HZSM-5 catalyst achieved a CO2 conversion of 12.1% and a methanol selectivity of 9.6% in plasma-assisted CO2 hydrogenation, with activity decay below 3% over 400 min of continuous operation. The catalyst structure and surface properties were systematically investigated by SEM, XRD, BET, XPS, H2-TPR, CO2-TPD and CO-TPD. Catalytic performance was assessed under optimized plasma reaction conditions (CO2/H2 = 1:3, total flow 70 mL·min–1, discharge power 20 W, circulating water temperature 30 °C). Furthermore, in situ DRIFTS indicated an oxygen vacancy-dominated formate pathway: oxygen vacancies in FeOx strengthened CO2 chemisorption and induced polarization of the C═O bond; Cu+ sites facilitated sequential hydrogenation of formate intermediates (HCOO*); and the Cu0-HZSM-5 interface optimized H* spillover, collectively suppressing CH4 formation. These results underscore that vacancy engineering and metal–zeolite interfacial effects are pivotal in steering plasma-catalytic CO2-to-methanol selectivity.
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高影响因子
Journal of Materials Chemistry C
·
2026
·
IF 5.1
Xinbin Wang,Shan Chen,Yun Cai,Furong Wang,Qinsong Zhang,Farouk Meksen,Jun Fang,Yang Yang
Flexible low-strain sensing materials with noncontact detection methods are urgently needed for several emerging industries. Among various reported methods, correlating optical signals with the stress/strain distributions has been recognized as an effective approach for monitoring material deformation. Herein, we reported a strain-responsive fluorescent sensor based on polydimethylsiloxane (PDMS) embedded with strong red-emissive copper nanoclusters (CuNCs) assemblies. The CuNC units, capped with hydrophobic 2-mercapto-4-methylpyrimidine (MMP), self-assembled into ordered microrods in aqueous medium with a certain amount of free MMP trapped inside (CuNCs-MMP), thus intramolecular rotation and vibration of the surface ligands were highly restricted within the obtained dense aggregation. Owing to the compatibility with PDMS and favorable molecular characteristics of MMP, the CuNCs-MMP were well dispersed and embedded in PDMS matrix with less defects. When the composite elastomer underwent slight deformation under minor external strain, the free ligands in the assembled structure moved along with the PDMS matrix, leading to rearrangement of surface ligands and additional space for intramolecular rotation and vibration, thereby enhancing ligandrelated nonradiative relaxation and decreasing the photoluminescence (PL) intensities. The relative emission intensity at 690 nm varied systematically over the external strain range of 0% to 5%, with a minimum detectable strain of 0.5% and a reasonable repeatability. This work provides a feasible strategy to construct stretchable fluorescent sensor based on assembly-induced emission of CuNCs.
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Energy Sources Part A-Recovery Utilization and Environmental Effects
·
2021
·
IF 3.447
Qiuyun Zhang,Caiyan Yue,Liufang Ao,Dandan Lei,Dan Ling,Dan Yang,Yutao Zhang
In the present study, phosphomolybdic acid (HPMo) supported on Cu-BTC Metal-organic frameworks (MOFs) were prepared and utilized as a solid acid catalyst. The structure of the synthesized materials was characterized by using powder XRD, FT-IR, N2 adsorption-desorption, SEM, TEM, TG, and NH3-TPD techniques. These results exposed that HPMo was successfully encapsulated in the Cu-BTC cage and the Keggin structure of HPMo was maintained in the composite catalyst. In addition, the catalytic activity and recovery properties of the HPMo/Cu-BTC catalyst for the esterification of oleic acid with methanol into biodiesel were evaluated. These results showed that the HPMo/Cu-BTC catalyst exhibited high conversion (93.7%) and excellent reusability due to its mesoporous structure, excellent acidic activity, high BET surface area, large pore volume, and good thermal stability. Meanwhile, the kinetic studies of the esterification reaction revealed that it follows pseudo-first-order kinetics with a low activation energy of 37.5 KJ/mol. More interestingly, it shows potential application for esterification of free fatty acids (FFAs) or pretreatment of low-cost feedstocks contain high FFAs content for the green production of biodiesel.
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JOURNAL OF FLUORESCENCE
·
2026
·
IF 3.4
Gu Jianlong,Gao Li,Cai Jieyun,Liu Yuchen,Meng Hongming,Long Jie,Ma Jing,Yang Bing,Wang Chunqiong,Yang Yaling
Carbon dots-based nanozymes show great potential for chemiluminescence (CL) detection due to their stability, excellent catalytic properties, good biocompatibility, and facile synthesis. In this study, bimetallic carbon dot nanoenzymes (Cur/Cu, Fe@CDs) that promote the chemiluminescence signal of luminol were synthesized. Cur/Cu, Fe@CDs possess high peroxidase (POD) activity and can catalyze the luminol/hydrogen peroxide reaction to generate a strong chemiluminescence intensity, which is approximately 8.98 times higher than the chemiluminescence spectral signal produced by the same concentration of K 3 [Fe(CN) 6 ]. Additionally, a sensitive and rapid method for detecting magnesium ions (Mg 2+ ) was developed by leveraging the enhancing effect of Mg 2+ on the CL signal in this system. The proposed CL technique for Mg 2+ demonstrated a linear response range from 3.33 to 166.67 µM and a detection limit of 0.99 µM. Moreover, the method was successfully applied to analyze Mg 2+ in cigarette paper samples through a spiking procedure, achieving a recovery rate of 91.1% to 109.0%. This research offers substantial evidence supporting the advancement of efficient and sensitive platforms for Mg 2+ CL detection.
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DOI
PubMed
高影响因子
ENERGY
·
2026
·
IF 10.1
Xiaonan Lv,Song Liu,Keyan Zeng,Jie Chen,Jie Song,Rengui Xiao,Xiang Ke
Organic polymer materials are promising for energy storage owing to their high safety and structural tunability. However, their practical application is hindered by poor cycling stability, low electrical conductivity, and high solubility. This study utilized the silver nitrate (AgNO 3 ) displacement reaction to innovatively in situ construct a sandwich-structured organic electrode with nanomesh metal-based SEI film. It effectively addressed the limitations of the two interface layers of active material/electrolyte and active material/collector to achieve interfacial stabilization and fast ion transport. The three-dimensional mesh metal-based artificial SEI layer with attached nanoparticles not only effectively inhibits the electrode material from being attacked by the electrolyte and reduces the solubility of organic materials, but also the attached nanoparticles can enhance the conductivity of the material. In addition, the pure Ag metal layer between the active material and the Cu foil collector can effectively improve the electrical conductivity and accelerate the electron transfer, which plays a key role in keeping the internal resistance stability of the battery. The composite electrode material exhibits excellent rate performance and stable long cycling performance at a high rate (46.1 mAh g −1 after 2000 cycles at 20 C, 1 C = 223 mAh g −1 ). Furthermore, Density functional theory (DFT) calculations and theoretical analysis provided detailed explanations of the energy storage pathways and utilized the electronic structure to reveal the synergistic effect mechanism existing among the sandwich structures. Therefore, providing a new strategy for designing organic polymer materials to be used in high-performance energy storage devices in the future.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 9.2
Hui-Hui Cao,Zhen-Hong He,Rui-Peng Yan,Xuanlu Fan,Weitao Wang,Kuan Wang,Huan Wang,Hui Ma,Xiaojuan Lai,Zhao-Tie Liu
Fe- and Cu-based catalysts are top candidates for the oxygen/hydrogen-evolution reactions, but their large-scale application is limited by rapid degradation under prolonged operation, especially at high current densities and high temperatures. Herein, a FeOOH/Cu(OH) 2 nanotube array grown on copper foil was designed for overall water-splitting. The structure enhances the electrochemical surface area, increases catalytic site density, and accelerates gas transport. DFT calculations confirms the Cu(OH) 2 and FeOOH synergy weakens HO–H bond, optimizing the ∗H adsorption energy, and driving reaction kinetics. In 1 M KOH, it achieves HER overpotentials of only 89 and 244 mV, and OER overpotentials of 124 and 424 mV at 10 and 100 mA cm −2 , respectively. Under industrial conditions (30% KOH, 65 °C), it sustains >2 A cm −2 for 100 h with negligible HER activity loss. This work provides a practical guide for designing high-activity, ultra-stable ampere-level water-splitting catalysts.
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高影响因子
ACS Applied Energy Materials
·
2026
·
IF 5.5
Liang Wan,Shaoyan Wang,Can Lei,Chuqian Xiao,Sheng Hu,Yikai Yang,Xingchen Ye,Dongqi Liu,Xiuming Bu,Ming Gong,Xiulan Hu,Xianying Wang
Electrocatalytic 5-hydroxymethylfurfural oxidation (HMFOR) is a sustainable route for biomass valorization to 2,5-furandicarboxylic acid (FDCA), yet balancing the competitive adsorption of HMF and OH− at the electrode−electrolyte interface is pivotal for boosting catalytic activity and selectivity. Herein, we report a terephthalic acid (PTA) modification strategy to tailor Cu-Ni(OH)2 with tunable metal valence and controllable surface charge, fabricating positively charged Cu-Ni(OH)2 and negatively charged Cu-Ni(OH)2-PTA. PTA functionalization elevates the Ni oxidation state and reinforces HMF adsorption on the catalyst surface. In situ surface-enhanced Raman spectroscopy and electrochemical impedance spectroscopy confirm that the negatively charged surface of Cu-Ni(OH)2-PTA efficiently mitigates the steric hindrance of hydrated ions and preserves a fully hydrated Cs+ interfacial microenvironment. This synergy optimizes the adsorption equilibrium of HMF and OH− via efficient and persistent HMF capture, enabling continuous enhancement of HMFOR activity. Consequently, Cu-Ni(OH)2-PTA delivers superior HMFOR performance in CsOH electrolyte, including a high FDCA Faradaic efficiency (98.2%), large current density, excellent cycling stability over 10 cycles, and stable operation for 120 h in a membrane electrode assembly (MEA) system. Notably, a high FDCA Faradaic efficiency of ∼86% is retained even in a pH 13 electrolyte with 1 M Cs+. This work elucidates the coupled effects of metal valence, surface charge, cation hydration, and interfacial water structure on HMFOR, providing a universal interfacial engineering principle for designing advanced electrocatalysts for efficient biomass electrooxidation.
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