INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2026
·
IF 3.9
Junqing Ye,Gen Li,Fengzhang Ye,Wei Xie,Qun Chen
In this study, a non-noble bimetallic-supported metal oxide catalyst, CuxFe1/ZrO2 rich in oxygen vacancies, was synthesized via dry ball milling for the direct synthesis of N,N′-diphenylurea (DPU) from CO2 and aniline. The optimal Cu5Fe1/ZrO2 catalyst achieved 12.7% aniline conversion with near-100% DPU selectivity (99.9%). Comprehensive characterizations revealed that abundant oxygen vacancies enhance metal–support interaction and serve as primary sites for CO2 adsorption and activation. Combined temperature-programmed desorption of NH3 and CO2 (CO2/NH3-TPD) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) studies elucidated a synergistic acid–base catalytic mechanism. Lewis basic Cu/Fe sites activate CO2, while Lewis acidic Zr4+ sites adsorb and activate aniline, promoting the formation of the key C6H5NH–(CO) intermediate. The catalyst maintained high performance over five cycles, demonstrating excellent stability. This work offers an effective strategy for designing robust non-noble catalysts for CO2 valorization into value-added chemicals.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2026
·
IF 8.7
Meiwen Zhang,Yuqian Guo,Leilei Hou,Yun Cheng,Linghua Chen,Mengnan Cao,Hongjie Zhang
Efficient dissolution of cellulose is a critical initial stage in converting it into high value materials. In this study, we developed a rapid pretreatment method based on microwave-assisted deep eutectic solvent (MW-DES) technology to markedly reduce the dissolution time of dissolving pulp fibers in N -methylmorpholine-N-oxide (NMMO). Specifically, treatment with a ZnCl 2 /H₃PO₄ system under microwave irradiation at 200 W for 4 min effectively disrupted the hydrogen-bond network of cellulose. This treatment increased the specific surface area by 124% and reduced cellulose crystallinity from 64.06% to 44.63%. Owing to the synergistic pretreatment, the complete dissolution time in NMMO decreased to 12 min, a 60% reduction compared to the 30 min required following microwave-water (MW-water) pretreatment, and demonstrated a significant enhancement in dissolution efficiency. This approach provides a novel, sustainable strategy for the efficient pretreatment of dissolving pulp, thereby supporting the industrial production of Lyocell fibers.
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ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Shuai Wang,Yuqi Chen,Shuyan Zheng,Yanan Yuan,Kexin Du,Min Cui,Yue Wu,Ping Li,Wei Hu,Jingui Wang,Yingshu Guo,Zexing Wu,Yanli Zhao
The incorporation of sp-hybridized nitrogen arisen from graphdiyne (GDY) into the catalyst structure significantly improves the electrocatalytic efficiency of zinc–air batteries by modulating the electronic properties of the active sites, thereby accelerating reaction kinetics and enhancing conductivity. This work highlights the efficacy of the Co–N-GDY catalyst, where sp-N moieties in GDY serving as anchoring centers for cobalt species, which demonstrates exceptional performance in the oxygen reduction reaction, achieving a half-wave potential of 0.85 V, along with high oxygen evolution reaction performance that surpasses that of commercial Pt/C + IrO2-based batteries. The Co–N-GDY catalyst also exhibits commendable cycling stability with minimal fluctuation in voltage difference, indicating its suitability for practical applications in advanced energy storage systems. These findings underscore the importance of developing cost-effective and durable M–N–C catalysts to enhance the commercial viability and sustainability of zinc–air battery technology.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·Vol. 47
·期 47
·20561-20571
·
IF 7.139
Tianyu Ai,Jing Li,Shuai Nie,Yansheng Yin,Jinlin Lu,Shuo Bao,Ling Yan
Transition elements doping metal oxide is of great significance for developing gas sensors with high performance. To achieve this goal, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons are successfully synthesized by a facile N, N-dimethylformamide assisted hydrothermal method and characterized by several physical techniques. The morphology of α-Fe 2 O 3 is evolved by introducing Mn elements. The performance of the α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons as H 2 gas sensors are studied and compared. The Mn/α-Fe 2 O 3 -5 polyhedrons sensor exhibit the best performance at optimum operating temperature of 300 °C. The response and recovery times are 10 s/24 s for H 2 with a concentration of 200 ppm, which is much faster in contrast to those recently reported H 2 gas sensors. Furthermore, α-Fe 2 O 3 rod and Mn-doped α-Fe 2 O 3 polyhedrons show abnormal n-p transition sensing behavior with the change of operating temperature. This work provides a facile method for synthesizing α-Fe 2 O 3 based sensing materials for various sensors applications.
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RSC Advances
·
2015
·Vol. 5
·期 26
·19859-19864
·
IF 3.84
Junjun Li,Lin Zhang,Jin Gu,Yuping Sun,Xiaosheng Ji
To retain the hydroxyl group of poly(vinyl alcohol) (PVA), ammonium persulfate (APS) was used to initiate the polymerization of hydrogen on the PVA chain. Rather than hydroxyl-based cross-linking, the generated PVA macromolecule radicals were cross-linked with N,N′-methylene bisacrylamide (MBA) to prepare PVA membranes. The PVA membranes were shown to be successfully cross-linked via FT-IR characterization, as well as measurements of swelling degree and gel fraction. With increasing the content of cross-linker, the swelling degree of the membranes decreased, and the gel fraction increased. The pervaporation performance of the membrane was investigated by separating 95 wt% ethanol aqueous solutions. The cross-linked PVA membrane containing 0.5 wt% cross-linker yielded a high permeate water content (99 wt%) and a total flux of 353 g m−2 h−1 at 40 °C. As the feed temperature increased, the total flux increased, while the permeate water content decreased. The cross-linked membrane exhibited good durability over long-term operation.
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SOLVENT EXTRACTION AND ION EXCHANGE
·
2020
·
IF 1.988
Sherif M. Ibrahim,Yan Zhang,Yun Xue,Suliang Yang,Fuqiu Ma,Guoxin Tian
The extraction of Nd(III), Gd(III), and Er(III), which represent light, middle, and heavy lanthanides, respectively, from chloride solutions has been carried out by using N,N-di(2-ethylhexyl)-diglycolamic acid (HDEHDGA, HA) diluted in kerosene as the organic phase. The results from the slope analysis method indicate that the extraction of Ln(III) with HDEHDGA is mainly governed by the cation-exchange reaction mechanisms in the low pH region (pH 1.2–2.7). The obtained data reveal that the extracted species in the organic phase might be LnA3∙HA(1~2), which consist of a core of 1:3 LnA3 complex and one additional neutral HA molecule for light Ln(III) or two for heavy Ln(III) associated with the core in the outer coordination sphere. The dependency on the temperatures indicates that the extraction of Ln(III) with HDEHDGA is exothermic and is mainly driven by the exothermic enthalpies crossing the whole Ln(III) series. The extraction of the whole Ln(III) series (except for Pm(III)) and Th(IV) has also been evaluated. HDEHDGA provides remarkable extraction capability with considerable separation factors (SF) for adjacent light Ln(III) pairs (SFCe/La = 6.8, SFPr/Ce = 3.3, SFNd/Pr = 2.5, and SFSm/Nd = 3.5), but relatively poor selectivity for the adjacent heavy Ln(III) pairs. It also presents very good selectivity/extractability for Th(IV) over the light Ln(III) ions (SFTh/La = 1362 and SFTh/Ce = 200). These properties make HDEHDGA a promising extractant for separating Th(IV) from light Ln(III) ions and for separating light Ln(III) ions from each other, which coexist significantly in some Rare Earth (RE) minerals, especially monazite and bastnaesite.
研究领域:
湿法冶金
·
稀土元素分离
·
溶剂萃取
·
无机化学
·
核化学
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PLoS One
·
2014
·Vol. 9
·期 7
·e102539
·
IF 3.534
Caili Dai,Zhihu Yan,Qing You,Mingyong Du,Mingwei Zhao
Through the descriptive and rheological characterization of worm-like micelles formed by N -hexadecyl- N -methylpyrrolidinium bromide and sodium laurate, the formation and properties of the worm-like micelles were affected by the concentrations of sodium laurate and temperature. Additionally, cryogenic transmission electron microscopy images further validated the formation of worm-like micelles.
研究领域:
胶体与界面科学
·
软物质物理
·
表面活性剂化学
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Desalination and Water Treatment
·
2024
·
IF 1
Yunfan Lu,Ruibin Wang,Guoping Wang,Nian Chen
To achieve rapid detection for metronidazole (MNZ), a mesoporous nickel-based metal–organic framework (Ni-MOF), which had sub-micron-assemblies of layered flakes and abundant carboxyl groups, was synthesized in a particular solvent containing water with a facile one-step hydrothermal method. Using Ni-MOF/multi-walled carbon nanotubes as the sensor electrode, cyclic voltammetry and differential pulse voltammetry were investigated in MNZ solution (containing 0.1 M PBS). The current response linearly varied with MNZ’s concentration in the range of 5–100 μM. A relatively low detection limit of 25 nM was obtained, which outperformed many electrochemical platforms for MNZ reported in literatures. Moreover, further investigations indicated this system was endowed with good anti-interference ability repeatability, and long-term stability. The present work was promising to pave the way for the quantitation of MNZ in biomedical and healthcare applications.
研究领域:
电化学
·
传感器与生物传感器
·
环境与生物医学分析
·
材料科学
·
分析化学
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高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Meilin Lv,Gang Liu,Xiaoxiang Xu
Strong visible light absorption and high charge mobility are desirable properties for an efficient photocatalyst, yet they are hard to be realized simultaneously in a single semiconductor compound. In this work, we demonstrate that these properties coexist in homologous compounds ZnnIn2O3+n (n = 4, 5, and 7) with a peculiar layered structure that combines optical active segment and electrical conductive segment together. Their enhanced visible light absorption originates from tetrahedrally or trigonal-bipyramidally coordinated In atoms in Zn(In)O4(5) layers which enable p–d hybridization between In 4d and O 2p orbitals so that valence band minimum (VBM) is uplifted with a reduced band gap. Theoretical calculations reveal their anisotropic features in charge transport and functionality of different constituent segments, i.e., Zn(In)O4(5) layers and InO6 layers as being for charge generation and charge collection, respectively. Efficient photocatalytic hydrogen evolution was observed in these compounds under full range (λ ≥ 250 nm) and visible light irradiation (λ ≥ 420 nm). High apparent quantum efficiency ∼2.79% was achieved for Zn4In2O7 under full range irradiation, which is almost 5-fold higher than their parent oxides ZnO and In2O3. Such superior photocatalytic activities of these homologous compounds can be understood as layer-by-layer packing of charge generation/collection functional groups that ensures efficient photocatalytic reactions.
研究领域:
材料化学
·
光催化
·
半导体物理
·
能源材料
·
无机化学
·
表面科学
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POLYMER
·
2025
·
IF 4.5
Huiling Huang,Shengqi Cui,Xiaoqing Song,Zhonglin Luo,Biaobing Wang
It is still a great challenge to achieve flame retardant epoxy resin (EP) without sacrificing its transparency and mechanical properties. In the present work, A P/N/S containing sulfonamide compound (DPPBSA) was synthesized and adopted to improve the fire safety of transparent epoxy resin. With the incorporation of 5 wt% DPPBSA, the EP composite presented UL-94 V-0 rating and 35.4% of LOI value, its peak of heat release rate and total heat release were also reduced by 51.0% and 40.8% as compared with the pure EP, respectively. The improved flame retardancy was attributed to the comprehensive flame retardant effect of the P, N, and S elements. In the condensed phase, much continuous and denser char layers with greater graphitization degree were formed during the combustion. In the gas phase, the pyrolysis of the DPPBSA released dilution gases and P-containing free radical scavengers. Moreover, the EP composite containing 5 wt% DPPBSA displayed almost comparable tensile strength and transparency with the pure EP.
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RSC Advances
·
2026
·Vol. 16
·期 21
·19213-19224
·
IF 6.1
Jingdong Nong,Zhonghua Sun,Weiyou Zhou,Zhong Wu,Junfeng Qian,Qun Chen,Mingyang He
A series of Cu-modified Ni–Al2O3 catalysts with various Cu/Ni ratios (xCu/Ni–Al2O3) were prepared, and systematically characterized using BET, XRD, SEM, H2-TPR, H2-TPD, TG, and XPS. The catalyst exhibited excellent catalytic performance in the selective hydrogenation of N,N-dimethylaniline to N,N-dimethylcyclohexylamine in a continuous fixed-bed reactor. When the Cu/Ni molar ratio was 0.1, the active components were highly dispersed on the Al2O3 support, which possessed a high specific surface area and well-developed porous structure. Furthermore, the catalyst demonstrated strong hydrogen desorption capacity and enhanced thermal stability. Synergistic electronic interactions between Ni and Cu improved the adsorption and activation of both reactant and H2 molecules. The incorporation of Cu near the Ni active sites effectively modulated the selectivity toward the desired product N,N-dimethylcyclohexylamine. Under the optimal reaction conditions: H2 pressure of 5 MPa, reaction temperature of 130 °C, liquid hourly space velocity 0.1 h−1 and hydrogen-amine volume ratio of 5500 : 1, the 0.1Cu/Ni–Al2O3 catalyst achieved superior performance, with a N,N-dimethylaniline conversion rate of 99.5% and a selectivity for N,N-dimethylcyclohexylamine of 97.6%.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2023
·Vol. 24
·期 2
·1274
·
IF 5.6
Yuanhang Zhao,Hong Zhang,Lihua Hong,Xinying Zou,Jiazhuo Song,Rong Han,Jiawen Chen,Yiyan Yu,Xin Liu,Hong Zhao,Zhimin Zhang
Dental caries, particularly secondary caries, which is the main contributor to dental repair failure, has been the subject of extensive research due to its biofilm-mediated, sugar-driven, multifactorial, and dynamic characteristics. The clinical utility of restorations is improved by cleaning bacteria nearby and remineralizing marginal crevices. In this study, a novel multifunctional dental resin composite (DRC) composed of Sr-N-co-doped titanium dioxide (Sr-N-TiO2) nanoparticles and nano-hydroxyapatite (n-HA) reinforcing fillers with improved antibacterial and mineralization properties is proposed. The experimental results showed that the anatase-phase Sr-N-TiO2nanoparticles were synthesized successfully. After this, the curing depth (CD) of the DRC was measured from 4.36 ± 0.18 mm to 5.10 ± 0.19 mm, which met the clinical treatment needs. The maximum antibacterial rate againstStreptococcus mutans(S. mutans) was 98.96%, showing significant inhibition effects (p< 0.0001), which was experimentally verified to be derived from reactive oxygen species (ROS). Meanwhile, the resin exhibited excellent self-remineralization behavior in an SBF solution, and the molar ratio of Ca/P was close to that of HA. Moreover, the relative growth rate (RGR) of mouse fibroblast L929 indicated a high biocompatibility, with the cytotoxicity level being 0 or I. Therefore, our research provides a suitable approach for improving the antibacterial and mineralization properties of DRCs.Keywords:dental resin composite;dental caries;secondary caries;titanium dioxide;antibacterial property;remineralization
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