INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
·
IF 8.1
Zhiyuan Ni,Tao Yu,Xiang Li,Chunming Liu,Junhua You,Xuanwen Liu,Rui Guo,Hangzhou Zhang,Hongyu Li
Electrochemical carbon dioxide reduction (ECR), which converts carbon dioxide into valuable chemical substances, effectively achieves sustainable carbon neutrality. In this study, we report that CuO catalysts with varying vacancy (CuO-O V ) concentrations and morphological structures. CuO-O V can significantly enhance the selectivity for ethylene (C 2 H 4 ) and multicarbon products (C 2+ ) by reducing the free energy required for the formation of ∗CHO intermediates from ∗CO hydrogenation and lowering the energy barrier for C-C coupling reactions. The CuO(NaOH) catalyst exhibited a maximum Faradaic efficiency of 55.7% for the C 2+ product at -1.36 V vs. RHE. And C 2 H 4 displays a maximum Faradaic efficiency of ∼32.7% at -1.56 V vs. RHE.
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ACS Nano
·
2024
·
IF 15.8
Ming Yang,Ni Yao,Xiaoxi Li,Jianyong Yu,Shichao Zhang,Bin Ding
Distillation membranes with hydrophobic surfaces and defined pores are considered a promising solution for seawater desalination. Most existing distillation membranes exhibit three-dimensional (3D) stacking bulk structures, where the zigzag water-repellent channels often lead to limited permeability and high energy costs. Here, we created two-dimensional nanowebs directly from the polymer/sol solution to construct dual-asymmetric Janus membranes. By tailoring the phase separation rate, the polymer phase evolved into continuous hydrophilic webs in situ weld on the microporous hydrophobic layer. The webs possess true-nanoscale architectures (internal fiber diameter of ∼20 nm, pore size of ∼140 nm) with enhanced roughness, serving as a superspreading surface to reach a water contact angle of 0° in 1.7 s. Benefiting from the architecture and wettability dual asymmetries, the obtained Janus membrane shows high-efficiency desalination performance (salt rejection >99%, flux of 11 kg m–2 h–1, and energy efficiency of 79%) with a thickness of 6.7 μm. Such a fascinating nanofibrous web-based Janus membrane may inspire the design of advanced liquid separation materials.
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CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Peng Cui,Tiantian Wang,Zihan Wang,Heshun Geng,Pengcheng Song,Fang Hu,Junhua You,Kai Zhu
The progress of rechargeable zinc (Zn) ion batteries (RZBs) has been significantly impeded by the occurrence of side reactions and dendritic issues on Zn anodes, which are attributed to the intricate reaction kinetics observed in aqueous electrolytes. Herein, we propose a co-solvent electrolyte comprising a combination of N, N-dimethylformamide (DMF) and Dimethyl sulfoxide (DMSO). This electrolyte reconstructs the surface of the Zn anode and generates a dense and robust solid electrolyte interface (SEI), which promotes uniform Zn 2+ deposition and enhances Zn 2+ transport kinetics. The DFT further shows that the electrolyte has a unique solvated structure which enables uniform Zn 2+ deposition and the creation of stable SEI. By utilizing these advantages, the co-solvent electrolyte is capable of enduring uninterrupted cycling for more than 4000 h at a current density of 1 mA cm −2 , and for over 2000 h at a current density of 5 mA cm −2 . Furthermore, the Zn||NH 4 V 4 O 10 full cell demonstrated exceptional electrochemical performance with regard to charge/discharge capacity and cycle stability. This study showcases the effectiveness of non-aqueous electrolytes, which will enable the progress of secure and high-capacity RZBs.
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JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
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2024
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IF 3.3
Hongzhi Liu,Jihui Lin,Yaowu Hu,Hui Lei,Qian Zhang,Xiaoyu Tao,Dan Zhang,Hong Niu
BACKGROUND The pectin from Ficus carica Linn. (fig) peels is a valuable and recyclable constituent that may bring huge economic benefits. To maximize the utilization of this resource, deep eutectic solvent (DES)-assisted extraction was applied to extract pectin from fig peels, and the extraction process was optimized with response surface methodology. RESULTS When DES (choline chloride/oxalic acid = 1:1) content was 168.1 g kg −1 , extraction temperature was 79.8 °C, liquid–solid ratio was 23.3 mL g −1 , and extraction time was 120 min, the maximum yield of 239.6 g kg −1 was obtained, which was almost twice the extraction of hot water. DES-extracted fig peel pectin (D-FP) exhibited better nature than hot water-extracted fig peel pectin (W-FP) in terms of uronic acid content, particle size distribution, and solubility, but lower molecular weight and esterification degree. D-FP and W-FP had similar infrared spectra and thermodynamic peaks but differed in monosaccharide compositions. D-FP also showed good antioxidant capacities and exhibited better functional activities than W-FP. CONCLUSION These results indicated that D-FP was of promising quality being utilized in food or medical industries and the optimal DES-assisted extraction method might be applied as a sustainable process for the effective extraction of bioactive pectin from fig peels with the excellence of low equipment requirements and simple operation. © 2024 Society of Chemical Industry.
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Binrui Xu,Guangbin Wang,Yong Liu,Quanan Li,Fengzhang Ren,Jianmin Ma
The poor reversibility and stability of Zn anodes greatly restrict the practical application of aqueous Zn-ion batteries (AZIBs), resulting from the uncontrollable dendrite growth and H 2 O-induced side reactions during cycling. Electrolyte additive modification is considered one of the most effective and simplest methods for solving the aforementioned problems. Herein, the pyridine derivatives (PD) including 2,4-dihydroxypyridine (2,4-DHP), 2,3-dihydroxypyridine (2,3-DHP), and 2-hydroxypyrdine (2-DHP), were employed as novel electrolyte additives in ZnSO 4 electrolyte. Both density functional theory calculation and experimental findings demonstrated that the incorporation of PD additives into the electrolyte effectively modulates the solvation structure of hydrated Zn ions, thereby suppressing side reactions in AZIBs. Additionally, the adsorption of PD molecules on the zinc anode surface contributed to uniform Zn deposition and dendrite growth inhibition. Consequently, a 2,4-DHP-modified Zn/Zn symmetrical cell achieved an extremely long cyclic stability up to 5650 h at 1 mA cm –2 . Furthermore, the Zn/NH 4 V 4 O 10 full cell with 2,4-DHP-containing electrolyte exhibited an outstanding initial capacity of 204 mAh g –1 , with a notable capacity retention of 79% after 1000 cycles at 5 A g –1 . Hence, this study expands the selection of electrolyte additives for AZIBs, and the working mechanism of PD additives provides new insights for electrolyte modification enabling highly reversible zinc anode.
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Nanomaterials
·
2025
·Vol. 15
·期 5
·373
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IF 4.3
Jiabao Wu,Meiyu Xu,Zhenzi Li,Mingxia Li,Wei Zhou
Defects and heteroatom doping are two refined microstructural factors that significantly affect the performance of photocatalytic materials. Coupling defect and doping engineering is a powerful approach for designing efficient photocatalysts. In this research, we successfully construct dual defect-engineered BiVO4nanosheets (BVO-N-OV) by introducing N doping and oxygen vacancies through ammonium oxalate-assisted thermal treatment of BiVO4nanosheets. Due to the combined enhancement of band structure and surface properties from N doping and oxygen vacancies, the obtained BVO-N-OV nanosheets demonstrate improved visible light absorption, effective charge transfer efficiency, and increased active sites. As a result, the constructed BVO-N-OV/PMS system demonstrates significantly enhanced ciprofloxacin (CIP) removal performance under visible light illumination. The highest rate constant for CIP degradation over BVO-N-OV/PMS system is 7.9, 1.9, and 6.6 times greater than pristine BiVO4(BVO), oxygen vacancy-enriched BiVO4(BVO-OV), and N-doped BiVO4(BVO-N), respectively. Even in a broad pH range (3.0–11.0) with various anions, the BVO-N-OV/PMS/Vis system still demonstrates stable and excellent CIP removal performance. This study seeks to provide valuable insights into the interaction between defect and doping engineering in photocatalytic activation of PMS, thereby proposing new strategies for designing effective photocatalyst/PMS systems for wastewater treatment.
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FUEL
·
2024
·
IF 6.7
Hongbin Xia,Yuxin Wang,Rui Xia,Xinyang Xiong,Guangwen Xu,Jinggang Zhao,Jun Zhou,Lei Shi
An acetate-functionalized heterogeneous catalyst, N + -(Ac), was successfully synthesized via directed substitution of an inert site in quaternary ammonium resin by a weak-base active center and applied to the transesterification of dimethyl oxalate (DMO) with ethanol to prepare diethyl oxalate (DEO). When the optimal N + -(Ac) catalyst catalyzed the DMO transesterification with ethanol for 2 h, the DMO conversion, DEO yield, and corresponding turnover frequency (TOF) reached 93.4%, 49.7%, and 13.04 h −1 , respectively. Additionally, the synthesized N + -(Ac) exhibited catalytic universality for DMO transesterification with different alcohols, and the catalytic efficiency decreased with increasing difficulty of cleaving the hydrogen–oxygen bond from C 2 to C 4 and steric hindrance of isomeric alcohols. The pretreatment experiments of catalyst with different water content and raw materials were designed and the resin matrix, fresh catalyst, deactivated catalyst and regenerated sample were systematically analyzed using various characterization techniques to investigate the catalytic deactivation mechanism of the transesterification reaction between DMO and ethanol to synthesize DEO. The results showed that DMO played a key role in catalyst deactivation and the catalyst was deactivated upon replacement of the active sites by monomethyl oxalate anions from hydrolysis side reaction of DMO. Finally, an efficient raw material regeneration strategy for the catalyst was proposed. Herein, new theoretical support is introduced for the structural evolution of weak-base catalysts and will aid in developing heterogeneous catalysts for oxalate transesterification.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Yuqing Liao,Wuxia Ge,Min Liu,Wentao Bi,Can Jin,David Da Yong Chen
In this study, a simple and eco-friendly method was used to treat alkaline lignin with an acidic deep eutectic solvent (DES) to obtain regenerated lignin for the efficient adsorption of pollutant dyes from aqueous environment. Based on the yield and adsorption capacity of the sorbent for these dyes, conditions such as the type and concentration of DES component, solid-to-liquid ratio, reaction time, and temperature were optimized. By characterizing and comparing alkali lignin with regenerated lignin, a series of reactions were demonstrated to occur during the DES treatment process. The performance and mechanism of methylene blue and rhodamine B adsorption on regenerated lignin were studied systematically, and the maximum adsorbed amounts were 348.29 and 551.05 mg/g at 323 K, respectively. This study provides a new strategy for the green preparation of functionalized lignin and its use in the water pollutant treatment.
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TRIBOLOGY INTERNATIONAL
·
2024
·
IF 6.1
Zeyang Wu,Jie Fei,Chang Li,Jifeng Yan,Xinyu Ke,Lehua Qi
As a nanoscale carbon material, carbon spheres (CS) are expected to achieve ideal lubrication performance by reducing direct contact between friction pairs and bearing loads. In this work, 2D Cu-MOFs surface modified (CS@Cu(BDC)) CS was added to the base oil, which exhibited a remarkable reduction in friction coefficient and wear rate (62.2%, 33.9%), the width of the friction pair wear marks was decreased by 30.8% relative to the base oil. The improvement in performance can be attributed to the polishing, repairing, filling and tribo-film forming effects of CS@Cu(BDC). This work provided an effective strategy for diversifying the surface structure of CS and opened new avenues for the development of a new generation of green and efficient lubricant additives .
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 5
·1223-1228
·
IF 1.3
Cao Lijiu,Zhang Jiyao,Wang Xinqi,Zhang Xinhe,Huang Jian,Chen Yufang,Jin Tao
Through exploring the effects of low pH on the composite system of desulfurization gypsum (DG) enhanced by melamine-formaldehyde resin (MF), it is found that the inducing of sulfate-ion, in contrast to chloride and oxalate ions, favors the longitudinal growth of the crystalline form of the hydration product, which was relatively simple and had the highest length to width ( L / D ) ratio. At the same time, MF can also improve L / D ratio of gypsum hydration products, which favors the formation of hydrated whiskers. Finally, in a composite system composed of hemihydrate gypsum, MF, and glass fibers, when dilute sulfuric acid was used to regulate pH=3–4, the tight binding formed among the components of the composite system compared to pH=5–6. The hydration product of gypsum adheres tightly to glass fiber surface and produces a good cross-linking and binding effect with MF. The flexural strength, compressive strength, elastic modulus, and water absorption of the desulphurized gypsum composite board is 22.7 MPa, 39.8 MPa, 5 608 MPa, and 1.8%, respectively.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2024
·
IF 2.8
Tong Jiale,Huang Yeyin,Tang Wanjun,You Qingliang,Xie Guangyong
This work aims at developing a customized ammoxidation catalyst through optimizing the metal oxide content in CrVO 4 /SiO 2 catalysts. Various amounts of Cr–V–O with 1:1 molar ratio of Cr/V were successfully loaded on SiO 2 via spray-drying method with colloidal silica as the binder. Polarized light microscope illustrated that the CrVO 4 /SiO 2 particles presented as well dispersed microspheres in the microsize (20–80 μm). X-ray diffraction spectra confirmed the formation of monoclinic CrVO 4 phase wherein the metal oxide content was ranged from 30 to 70 weight percent. FT-IR spectra indicated that the introduction of metal oxide had no obvious effects on the skeletal structure of SiO 2 . X-ray photoelectron spectroscopy analysis revealed that the valence state of V and Cr was hardly affected with increasing the metal oxide content. Performances of the obtained CrVO 4 /SiO 2 catalysts with different metal oxide contents were investigated via the ammoxidation of a model compound, namely para-chlorotoluene (PCT) to para-chlorobenzonitrile (PCBN). A maximum conversion of 99.6% of PCT and 86.5% yield and 86.8% selectivity to PCBN have been obtained over the CrVO 4 /SiO 2 catalyst with 60% weight of metal oxides at a temperature of 410 °C, n( PCT): n (NH 3 ): n (air) = 1:3:15 and reaction load = 0.13 g/gCat·h. In addition, this catalyst was efficient and selective toward ammoxidation reactions of toluene, ortho- and meta-chlorotoluenes. Graphical abstract
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LANGMUIR
·
2025
·
IF 3.9
Tianyun Zhang,Yu Li,Tian Zhang,Yanci Wang,Jiaojiao Wu,Fen Ran
In recent years, rechargeable aqueous zinc metal batteries have ushered in rapid development, but their large-scale industrial application is hindered by zinc anode dendrite formation and hydrogen evolution reaction. Using a solid-state polymer electrolyte is one of the strategies to solve this problem. Herein, by introducing the chain-expanding effect of zinc salts on oxidized bacterial cellulose, cellulose-based polymer electrolytes with excellent strength and ionic conductivity are prepared. According to the thermogravimetric calculations, the bound water content in prepared electrolytes greatly increases, which slows down the occurrence of side reactions. More importantly, the expanding distance between the fiber chains provides more space for the movement of Zn2+. The obtained solid-state electrolyte displays a high ionic conductivity (38.26 mS cm–1) and good mechanical properties (tensile stress is 592 kPa and tensile strain is 381%). Due to the properties of the solid electrolyte itself, its electrochemical window is expanded to 2.58 V. The assembled Zn∥Zn symmetrical battery maintains an ultralong cycle lifespan over 980 h of 0.5 mA cm–2. The Zn∥NH4V10O10 battery provides the specific capacity (363.1 mAh g–1 at 0.1 A g–1) and shows a satisfactory rate performance.
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