Journal of Inorganic and Organometallic Polymers and Materials
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2025
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IF 4.9
Wang Chiyuan,Long Xin,Shao Changwei,Huang Jiawei,Ren Jiaqi
Si–B–N–O ceramics are promising materials for wave-transparent windows of hypersonic vehicles due to the excellent thermal stability and low dielectric constant. The polymer-derived ceramics (PDC) route is widely adopted for flexible compositional control of the Si–B–N–O covalent ceramics. In this study, a novel borazine-modified polysilazoxane (RBOSZ) was synthesized using trichlorosilane, tert -butanol, trichloroborazine, and ammonia as starting materials. RBOSZ features a Si–N–Si backbone and borazine rings. The Si–B–N–O ceramic was derived from RBOSZ with a ceramic yield of 61 wt% after pyrolysis under nitrogen atmosphere. Boron facilitates the formation of Si 2 N 2 O nanograins at elevated temperatures and enhances the ceramic’s high-temperature stability. By switching nitrogen to ammonia during organic-inorganic transformation, a low-carbon Si–B–N–O ceramic was obtained and retained its amorphous structure up to 1400 °C. After annealing at 1600 °C, Si 2 N 2 O/β-Si 3 N 4 nanocrystals participated in the Si–B–N–O matrix. This work establishes a facile precursor for high-performance Si–B–N–O ceramics to meet the application demands of heat-resistant wave-transparent windows.
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ENERGY & FUELS
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2025
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IF 5.3
Jintang Wang,Qi Wang,Bo Liao,Zhe Sun,Yujing Bai,Ke Zhao,Qian Zheng,Juyuan Zhang,Kaihe Lv,Jinsheng Sun
Natural gas remains one of the most critical energy sources worldwide. In deepwater gas hydrate formations, the use of hydrate inhibitors is essential during drilling operations to suppress secondary hydrate formation, maintain wellbore stability, and ensure uninterrupted fluid transport. However, the evolving challenges of drilling in shallow reservoirs under deepwater conditions have exposed the limitations of conventional hydrate drilling fluid systems, which are increasingly inadequate due to the suboptimal performance of traditional hydrate inhibitors. In this study, the commercial kinetic hydrate inhibitor poly(N-vinylcaprolactam) was modified via three approaches incorporating various alkyl groups, and the structures of the modified polymers were characterized using 1H NMR spectroscopy and FTIR spectroscopy. The performance was evaluated in 1 wt % inhibitor solutions prepared with deionized water, with pure deionized water as the control. Among the tested agents, P(NVCL-co-DMAA) exhibited the highest inhibition efficiency. It extended the hydrate formation time from 168 to 321 min and extended the hydrate formation temperature from 10.0 to 2.47 °C at a concentration of 1 wt %. Furthermore, molecular dynamics simulations were conducted to elucidate the inhibition mechanisms of the modified inhibitors. Radial distribution function analysis of methane molecules revealed that incorporating alkyl groups enhanced both the intensity and position of the distribution peaks between methane molecules. Notably, the inclusion of N,N-dimethylacrylamide allowed the modified inhibitor to outperform the conventional poly(N-vinylcaprolactam), reducing the adsorption energy between inhibitors and methane hydrate by 53.11%. Thus, the proposed alkyl modification method enhances the adsorption capacity on the surface of the hydrate. These findings offer valuable insights for designing more effective and efficient hydrate-formation inhibitors.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Shuhe Chen,Yufen Liu,Taiyu Huang,Tao Liu,Siyuan Yang,Xin Cai,Qiongzhi Gao,Xiaosong Zhou,Feng Peng,Shengsen Zhang
Molybdenum carbide (MoC) has attracted significant attention as a cocatalyst for photocatalytic hydrogen evolution. However, facile and scalable methods to synthesize hollow MoC materials with high specific surface areas remain limited. Herein, hollow-structured MoC/N-doped carbon (MCN) cocatalysts were innovatively synthesized via high-temperature calcination of MoO3-containing polydopamine (MoO3/PDA) precursors. These MCN materials were subsequently coupled with CdS through a solvothermal process to construct composite photocatalysts (MCN/CdS, denoted as MCS). Under simulated sunlight irradiation (AM 1.5G), the optimized MCS catalyst achieved an exceptional photocatalytic hydrogen evolution rate of 26.4 mmol·g–1·h–1, which is 10.8 times higher than that of the benchmark Pt/CdS catalyst. The MCS catalyst also demonstrated outstanding stability, maintaining efficient hydrogen production after 20 h of continuous illumination. The superior performance of MCS stems from two key advantages of the MCN cocatalyst: (i) its high specific surface area enhances CdS dispersion and provides abundant active sites for hydrogen evolution; (ii) the N-doped carbon matrix broadens light absorption and facilitates charge carrier transport. This work introduces an effective approach for the rapid and mild synthesis of ultrahigh surface area hollow nanospherical transition-metal carbons, providing valuable insights for advanced photocatalytic systems.
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Journal of Materials Chemistry A
·
2025
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IF 9.5
Shiwen Zhao,Lintao Yang,Jinggao Wu,Shipeng Qi,Yaojie Liu,Honglei Tian,Jianke Li,Yuhuan Zhang
Nanozymes with high efficiency, stability, and cost-effectiveness hold great potential for various applications. However, their use in Fenton reactions is limited by the rate-limiting step of Fe3+ reduction. Herein, oxygen vacancy-rich Cu2O/FeOx p–n heterojunction on carbon nanofibers (Cu2O/FeOx@CNFs) is developed to boost Fenton reaction efficiency. The heterojunction structure harnesses a built-in electric field to facilitate charge carrier separation, with Cu+ serving as the electron donor for accelerating the reduction of surface-generated Fe3+. Meanwhile, Cu2O/FeOx@CNFs encourages abundant lattice defects, creating ample catalytic sites and oxygen vacancies. Theoretical insights revealed that the defect-rich property well regulated the electron distribution at the atomic level, driving the adsorption–desorption process and accelerating Fenton reaction kinetics. As such, Cu2O/FeOx@CNFs demonstrates an affinity for H2O2 up to 200 times that of natural horseradish peroxidase (HRP) and a Vmax 3.40 times higher. The CNFs used as the support well confine Cu2O/FeOx, endowing Cu2O/FeOx@CNFs with high stability and biocompatibility, and fast mass transport. The strong intrinsic magnetic properties of Cu2O/FeOx@CNFs contribute to recyclability. Finally, Cu2O/FeOx@CNFs is successfully employed in efficient pollutant degradation and antibacterial applications, offering new insights into the rational design of nanozymes with desired properties.
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MOLECULES
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2025
·Vol. 30
·期 16
·3319
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IF 4.6
Tong Chang,Renhui Deng,Jiaxin Xie,Jianyu Tang,Wenyao Gu,Zimin Peng,Suyao Liu
The abundant Si-OH groups serving as the defect sites in the ZSM-22 zeolite framework are not only closely associated with physicochemical properties and catalytic performance but are also the primary sites for attack by water molecules, thereby restricting applications involving or producing water. In the present study, a liquid-mediated healing process was used to convert the Si-OH groups in ZSM-22 zeolite into Si-O-Si bonds. The systematic investigation of the treatment solution’s composition and the hydrothermal conditions revealed that the crystallinity of ZSM-22 zeolite can be effectively enhanced following optimal healing treatment. Furthermore, the healed ZSM-22 zeolite exhibited enhanced ordering degree and pore connectivity without significant changes to the Si/Al and morphology. Moreover, the decline in Si-OH groups reduced the Lewis acid sites without altering the Brønsted acidity, which led to a slight decrease in the dispersion of Pt particles. In n-decane hydroisomerization, compared to the parent ZSM-22 zeolite catalyst, the healed catalyst demonstrates higher reactant conversion and increased isomer yield, attributing to its enhanced confinement within the micropore voids, which leads to a reduced yield of multi-branched isomers susceptible to cracking. This study presents a potential application of ZSM-22 zeolite in hydroisomerization for complex and challenging feedstocks.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Hui Ma,Chunyan Tang,Fawen Zhang,Zeqi Tao,Jihui Liu,Bo Yan,Huachao Tao
Vanadium nitride (VN) has sparked much interest because of the abundant reserves, multivalent states, and high theoretical specific capacity in aqueous zinc-ion batteries (AZIBs). However, the direct utilization of VN in AZIBs is still huge challenges including sluggish kinetics, low-mass-loading and suboptimal cycling stability. Herein, an exquisite method is employed to enhance the electrochemical performance via compositing of VN with nitrogen-doped reduced graphene oxide (VN/N-rGO) and 3D printing technique. The designed conductive network and hierarchical porous structure enhance the reaction kinetics of the electrode and inhibit its dissolution, thereby improving cycling stability. The fabricated electrodes demonstrate superior reversible capacity of 529.8mAh g −1 , excellent long-cycle stability (261.6mAh g −1 after 1000 cycles at 8.0 A g −1 ) and good rate capability. Furthermore, the high-mass-loading VN/N-rGO electrodes (∼13 mg cm −2 ) are constructed through material extrusion 3D printing, and the electrodes still display a high reversible capacity of 390.2mAh g −1 . The electrochemical reaction mechanism of VN with Zn ions has been extensively studied, indicating that VN irreversibly transforms into Zn 3 (OH) 2 V 2 O 7 (H 2 O) 2 during first cycle, and Zn ions reversibly insert into/extract from the interlayer of Zn 3 (OH) 2 V 2 O 7 (H 2 O) 2 during the following cycles. This work demonstrates that VN holds significant potential as high-mass-loading cathode in AZIBs.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Jinpeng Zhai,Zhenjiang Wang,Jia Ouyang,Beichen Xue,Chao Liu,Rui Xiao
Sewage sludge (SS), as a common solid waste with large production and rich organic nitrogen, has the potential to synthesize N-doped carbon (N-C) for CO 2 adsorption. In this paper, A novel synthesis method of N-C CO 2 adsorbent from SS by structural regulation of glucose (Glc) and further activating with K 2 CO 3 was proposed. Besides, the influence mechanism of N-doping form and content on CO 2 absorption capacity of N-C was studied by density functional theory calculations (DFT). Results showed that Glc had the effect of promoting the formation of internal mesoporous structure and adjusting pyrrole-N (N-5) structure into quaternary-N (N-Q) structure. The N-C prepared with feedstock mixing sludge, Glc and K 2 CO 3 powder (mass ratio of SS/Glc/K 2 CO 3 = 3:1:4) at 800 °C showed the highest CO 2 adsorption capacity (3.00 mmol/g at 25 °C and 1 bar) and superior CO 2 selectivity for CO 2 /CO/CH 4 under continuous flow. Theoretical calculations identified a nitrogen-doping threshold effect, where elevated nitrogen content strengthened pyridine-N (N-6) induction effects to enhance localized polarity for CO 2 adsorption. Conversely, lower doping levels amplify conjugation effects via N-5 prevalence, significantly improving adsorption capacity. This dual mechanism demonstrates that N-6 configurations optimize local polarity at high doping ratios, while N-5 architectures maximize electron delocalization efficiency at reduced nitrogen concentrations.
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TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
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2025
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IF 4.7
Pan CHEN,Jia-yan LIU,Ji-hua ZHAI,Yao-hui YANG,Wei SUN
n-octylphosphonic acid (OPA) was introduced as a novel collector for ilmenite flotation and its effectiveness was compared with the conventional chelating collector, benzohydroxamic acid (BHA). Micro-flotation tests demonstrated that OPA was a highly effective and selective collector for separating ilmenite from titanaugite over acidic conditions (optimal pH around 3), which was also supported by adsorption amount measurements. X-ray photoelectron spectroscopy (XPS) tests indicated that the chemisorption of OPA onto ilmenite surface was much stronger than that of BHA. Solution chemistry diagram analyses indicated that OPA could dissociate well at pH 3.0 and mostly exist in anion form. DFT calculations further confirmed that OPA was much easier to adsorb onto ilmenite surface with shorter bond length and lower adsorption energy in comparison with BHA. Therefore, OPA maintained good collecting ability and selectivity for ilmenite flotation in the strongly acidic pulp, providing valuable insights into new collector design and development.
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Nutrition & Food Science
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2025
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IF 1.6
Ye Yue,Huasong Bai,Tong Liu,Shang Jia,Xiaohong Kou,Zhanzhong Wang
Purpose This study aims to investigate the impact of the compositions and concentrations of α -linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), which are significant n-3 polyunsaturated fatty acids (n-3 PUFAs), on the anti-inflammatory properties of lipopolysaccharide (LPS)-stimulated mouse hepatocytes. Design/methodology/approach A mouse hepatocyte inflammation model was established using LPS to evaluate the anti-inflammatory effects of a combination therapy with EPA, ALA and DHA. Interleukin-10 (IL-10), lipoxin A4 (LXA4) and tumor necrosis factor-α(TNF- α ) were measured to evaluate the anti-inflammatory ability of hepatocytes. The compositions and concentrations of EPA, ALA and DHA were optimized by response surface methodology to obtain the best anti-inflammatory effect. Findings The optimal inflammatory model was established with 10 µg/mL LPS treatment for 24 h. Maximal cell viability was found at EPA concentration of 150 µM, ALA concentration of 400 µM and DHA concentration of 600 µM. The optimal concentrations of n-3 PUFAs for anti-inflammatory activity in mouse hepatocytes were obtained through single-factor experiments and response surface analysis, with EPA 141.41 µM, ALA 405.45 µM and DHA 551.76 µM. Under optimized conditions, the experimental results for TNF- α , IL-10 and LXA4 levels were close to the theoretical prediction, indicating that the mathematical model was extremely accurate and versatile. Originality/value This study systematically explored the specific effects of different ratios and concentrations of ALA, EPA and DHA on the anti-inflammatory ability of mouse hepatocytes, offering an experimental foundation for the advancement of novel anti-inflammatory medicines and nutritional supplements.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Zhicheng Liu,Manli Wang,Ming Hou,Yun Zhao,Wenbin Yang,Yangkai Han,Zhigang Shao
In traditional CO 2 electrolysis systems, oxygen evolution reaction (OER) consumes 90 % of the electricity input, whereas the product of oxygen holds minimal value. Moreover, the use of different electrocatalysts for the anode and cathode remains a challenge due to high capital costs of the electrolysis system. Substituting the OER with thermodynamically advantageous value-added anodic reactions and developing bifunctional electrocatalysts are crucial for the advancement of CO 2 electrolysis. In this study, for the first time, we present an innovative CO 2 electrolysis system that integrates CO 2 electroreduction reaction (CO 2 RR) with SO 2 electrooxidation reaction (SO 2 OR) and employ Ni-N-C as the bifunctional electrocatalysts to produce CO and H 2 SO 4 simultaneously. Notably, the novel CO 2 electrolysis system can reduce the cell voltage by 1.05 V, resulting in nearly 50 % reduction in energy consumption. This is also the first attempt to use Ni-N-C to catalyze SO 2 OR, showing markedly superior performance compared to commercial 20 % Pt/C. In-situ ATR-SEIRAS and DFT calculations demonstrate that the NiN 4 sites in Ni-N-C catalysts augment the direct conversion of *SO 2 to *HSO 4 - , identified as the rate-determining step for the SO 2 OR. This work provides guidance for the design of novel CO 2 electrolysis systems, the construction of bifunctional electrocatalysts, as well as the mechanistic investigation of the SO 2 OR.
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Reaction Chemistry & Engineering
·
2024
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IF 3.4
Jiahe Fan,Yao Mu,Shuairen Qian,Bozhao Chu,Siqing Zhong,Yi Cheng
The acetylene method is presently the most frequently employed technique for producing N-vinyl pyrrolidone (NVP). However, when using pyrrolidone potassium salt as the catalytically active substance in the conventional process, the water in the reaction system has a great impact on the catalyst activity and selectivity of the homogeneous process. This study comprehensively investigates the influence of water on the reaction within the conventional process of synthesizing NVP in an autoclave, and obtains a highly active homogeneous catalytic active substance through strict water removal. The main reaction and catalyst deactivation mechanisms are further clarified through DFT calculations. Based on the understanding of the mechanism, a one-step synthesis of NVP using KOH directly as the catalyst without removing water has been realized by introducing solvents into the stop-flow micro-tubing (SFMT) reactor with enhanced gas–liquid mass transfer to increase the amount of acetylene in the liquid phase.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2024
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IF 2
Hongyu He,Taotao Zhan,Libin Chen,Ao Dong,Weijie Jia,Wenyu Li,Maogang He,Ying Zhang
The speed of sound in binary mixtures of methyl laurate and n-dodecane can directly characterize fuel injection and NOx emissions from diesel engines. Currently, experimental data on the speed of sound of binary mixtures have not yet been reported. In this study, the speeds of sound of the binary system were measured by using Brillouin light scattering. The speeds of sound were measured in the range of 298.15–568.15 K and 0.1–9 MPa. The relative combined expanded uncertainty for the reported speed of sound is estimated to be 1.6% with the level of confidence is 0.95 (k = 2). The experimental data were correlated as a function of temperature and pressure resulting with absolute average percentage deviations of 0.19, 0.16, 0.20, 0.24, and 0.22% for the mole fractions of n-dodecane being 0.100, 0.300, 0.500, 0.700, and 0.900, respectively. Considering the effect of temperature on the binary interaction parameter kij, kij of the PC-SAFT equation of state (EoS) was fitted using experimental data for methyl laurate and n-dodecane. The speeds of sound of binary system were calculated using the PC-SAFT EoS, and the average absolute relative deviation is 2.7%.
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