ENERGY CONVERSION AND MANAGEMENT
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2022
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IF 11.533
Liqiang Zhang,Jiaojiao Liu,Dawei Li,Zhengda Yang,Xinwei Wang,Riyi Lin
To explore an effective method of utilizing nitrogen-rich microalgae, the two-step pyrolysis (TSP) characteristic of Nannochloropsis sp (NCS) over ZSM-5 were studied by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and thermogravimetric analyzer (TG). The results showed that the TG process of NCS was classified into three stages. ZSM-5 increased the final weight loss and the pyrolysis temperature of NCS. The kinetic analysis was conducted by Flynn-Wall-Ozawa method, and showed that the pyrolysis of NCS conformed to one-dimensional shrinking core model. ZSM-5 did not affect the kinetic model, but decreased the activation energy. Compared with one-step pyrolysis, TSP improved the selectivity of N-heterocyclic compounds in the first step. Catalytic TSP further reduced the complexity of products significantly, and increased the selectivity of olefins in the first step, nitriles and aromatic hydrocarbons in the second step. The possible catalytic TSP reaction pathways of NCS were proposed.
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Asian Journal of Pharmaceutical Sciences
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2016
·Vol. 11
·期 6
·735-743
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IF 0
Jingwen Guo,Yan Wang,Jing Wang,Xin Zheng,Di Chang,Siling Wang,Tongying Jiang
To achieve GSH-responsive 5-Fluorouridine (5-FU) delivery, a novel family of nanogel drug carriers has been successfully prepared. The new class of PAHy-based nanogels was prepared by the crossing-link reaction of poly- α , β -polyasparthydrazide (PAHy) chains and 3,3′-dithiodipropionic acid (DTDPA) consisting of a redox-responsive chain network. This particle highlights recent efforts in introducing a disulfide bond to drug delivery nanogel by DTDPA, and the increased release properties of complex nanogels produced excellent glutathione (GSH)-sensitivity and significant anti-tumor therapeutic efficacy. The PAHy-based nanogels were characterized by Fourier transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS) (nano-particle size ~200 nm), UV–vis spectrometry, X-ray diffraction (XRD) and differential scanning calorimetric (DSC). PAHy-based nanogels are promising controlled-release carriers for the tumor-targeting delivery of the anticancer agent 5-Fluorouridine.
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Materials Science & Engineering C-Materials for Biological Applications
·
2017
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IF 4.164
Zhijia Zhang,Xiaole Zhao,Yingchun Su,Defeng Xing,Xiaojun Han
We demonstrate that antibacterial agent N , N′ -[(4, 5-dihydroxy-1, 2-phenylene)bis(methylene)]bisacrylamide (OHABA) can be assembled on the surface of vinyl organosilicon nanospheres (VOSNs) by atom transfer radical polymerization (ATRP). Chemically cross-linked vinyl organosilicon cores were facilely fabricated by sol-gel method as support, which densely grafted poly-OHABA (POHABA) as shells. Antibacterial assessment test results revealed that POHABA-based core@shell structure displayed high antibacterial performance, long-term stability, and kept broad-spectrum antibacterial effect of against Gram-negative and Gram-positive bacteria.
研究领域:
材料科学
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纳米医学
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抗菌材料
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高分子化学
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表面功能化
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FUEL PROCESSING TECHNOLOGY
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2026
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IF 7.7
Shangpeng Pan,Kaiwen Yun,Rui Shan,Shuxiao Wang,Taoli Huhe,Xiang Ling,Haoran Yuan,Yong Chen
For the high-value resource recovery of waste epoxy resin, this study prepared Nb and Ga modified ZSM-5 zeolite catalysts and systematically evaluated their performance in the catalytic pyrolysis of epoxy resin for aromatic hydrocarbon production. The results indicate that the bimetallic catalyst 8Nb4Ga (with 8% Nb and 4% Ga loading) exhibited the optimal catalytic activity, achieving the highest aromatic hydrocarbon yield of 68.6% under the conditions of 650 °C and a feedstock-to-catalyst mass ratio of 1:1. Characterization analyses confirmed that the metal species were well-dispersed on the ZSM-5 support without destroying the zeolite framework structure, though they induced changes in the pore structure. The introduction of Ga contributed to the formation of more mesoporous structures. Kinetic analysis revealed that the 8Nb4Ga catalyst significantly increased the apparent activation energy of the pyrolysis process, indicating that it guides the reactants through a higher-energy-barrier yet more selective pathway for aromatic hydrocarbon formation. This research provides theoretical support for the targeted catalytic conversion of waste epoxy resins into high-value aromatics.
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Catalysts
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2026
·Vol. 16
·期 3
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IF 4.5
Yao He,Jie Zhang,Renhua Huang,Nanxin Li,Yunwu Zheng
CO2-assisted catalytic pyrolysis presents a viable and promising approach to addressing plastic waste pollution and mitigating climate change. However, the effects of the metal–catalyst combination mode and the spatial distance between metal–acid sites on catalytic performance remain unclear. In this study, the reaction behaviors of the configurations, Fe3O4and ZSM-5 in tandem catalysis (Fe3O4&HZ), their physical mixture (Fe3O4-HZ), and Fe-loaded ZSM-5 (Fe/HZ), were compared in polypropylene pyrolysis under a CO2atmosphere. The aromatic contents followed this order: Fe/HZ > Fe3O4-HZ > Fe3O4&HZ > ZSM-5 > Fe3O4. Specifically, Fe/HZ with the highest degree of metal–zeolite proximity achieved an aromatic content of 66.1%, significantly higher than the 34.2% obtained with Fe3O4&HZ, demonstrating that closer metal–acid proximity promoted aromatic formation. Moreover, Fe/HZ significantly reduced coke deposition. Based on characterization results from XRD, SEM, TEM, XPS, and NH3-TPD, the enhanced spatial proximity between metal and acid sites strengthened the functional synergy between iron-based redox sites and zeolitic Brønsted acid sites. This synergy facilitated the reverse water–gas shift reaction of CO2, which consumed hydrogen generated during aromatization and shifted the reaction equilibrium toward enhanced aromatic production. These findings would offer theoretical and strategic insights into the optimization of CO2-assisted catalytic pyrolysis systems for the sustainable upcycling of plastic waste.
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BIOMASS & BIOENERGY
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2026
·
IF 7
Xian Shi,Jun Qian,Siyu Zhou,Wanni Liu,Xing Chen,Xinyi Xing,Ying Guan,Siquan Xu
Glucose valorization is a promising approach for achieving high-value utilization of biomass, with its catalytic conversion to 5-hydroxymethylfurfural receiving considerable attention. However, developing an efficient and robust heterogeneous catalyst for the process remains challenging. Herein, we demonstrate a feasible strategy that combines the in-situ growth of a hafnium phosphide (HfP) active phase with the anchoring capability of a three-dimensional alumina support (F 3D -Al 2 O 3 ) to achieve catalyst availability. Various characterization techniques confirmed that the constructed HfP/F 3D -Al 2 O 3 catalyst possesses a well-developed three-dimensional flower-like hierarchical porous structure, which fully exposes the acidic sites and enhances mass transfer, thus outperforming two-dimensional sheet-like and one-dimensional bulk catalysts. Under optimal reaction conditions, the HfP/F 3D -Al 2 O 3 catalyst drove the conversion of glucose into the desired HMF with a yield of 70%. Benefiting from the interaction between the support Al 3+ center (Al V ) and the HfP active phase, the HfP/F 3D -Al 2 O 3 catalyst remained effective even after ten consecutive cycles. Furthermore, the pathway for the conversion of glucose into HMF catalyzed by HfP/F 3D -Al 2 O 3 was also monitored, revealing that it proceeds through the isomerization of glucose via a 1, 2-enediol intermediate followed by dehydration of fructose. Therefore, the glucose conversion pathway presented in this study has the potential to provide valuable insights for bioenergy refining technologies.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
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IF 3.5
Wang Xiang,Sien Yan,Weijie Wang,Ningwei Yang,Yan Wang,Tingting Kang,Linhuo Gan
As a high-quality carbon source, this study employed the gradient acid precipitation method to separate and extract bamboo lignin (BL) fractions from alkaline pulping black liquor, aiming to investigate the influence of BL fraction on the yield of lignin-derived carbon supported tin oxide (SnO x /LC) and its catalytic performance in the conversion of glucose to 5-hydroxymethylfurfural (5-HMF), utilizing various testing methods for detailed characterization. The characterization results revealed that SnO x /LC-2 was thermally stable with both Lewis acid and Brønsted acid sites, and the Sn element was uniformlmly dispersed on carbon carrier surface. In addition, with decreasing pH of black liquor, the molecular weight and polydispersity of BL fraction were significantly reduced, and its structural homogeneity was effectively improved. More importantly, the relative content of syringl unit and the content difference between phenolic hydroxyl and carboxylic acid groups in the structure of BL fractions both showed linear negative correlations with 5-HMF yield, which revealed the constitutive relationship between the molecular structural features of lignin and the catalytic performance of SnO x /LC, thus contributing to the high-value utilization of industrial lignin.
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Materials Chemistry Frontiers
·
2026
·
IF 8.1
Yandai Lin,Muskan Saif Khan,Fengqi Xuan,Albina Abdossova,Cevat Erisken,Zhe Liu
Exploring and optimizing antitumor therapeutic strategies remains challenging but critical for future clinical translations. To this end, this study reported a type of engineered metal-organic framework-5 (MOF-5)-based nanosheet composite (MOF-5@ICG-HA/MOF-5@RB-HA, MIH/MRH) as well as their ultrasound (US)/laser actuation for reactive oxygen species (ROS) production and subsequent piezo/pyroelectric dynamic therapies. Mesoporous MOF-5 nanosheets were loaded with rose bengal (RB) or indocyanine green (ICG), followed by surface modification with hyaluronic acid (HA). Systematic physiochemical characterizations revealed that their energy band structure in conjunction with the mesoporous architecture promoted ROS generation and diffusion at the presence of US/laser actuation. Cellular uptake demonstrated that the HA-tag endowed these nanocomposites with specific binding capability to CD44 receptors on A549 cell. Upon US or laser actuation, these engineered nanocomposites exhibited remarkable tumor cell apoptosis in vitro due to the superb piezo/pyroelectric dynamic effects, and displayed excellent tumor inhibition rates (up to 92.8%) in vivo. Notably, the US-laser dual-actuated group demonstrated a significantly enhanced therapeutic performance with a tumor inhibition rate of 95.6%, which highlighted a marked advantage of combined actuations. Overall, these MOF-5-based nanocomposites have provided a promising strategy for effective combined A549 tumor therapy, and exhibited favorable prospects for clinical translation using commercial medical sono/photo-devices.
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Catalysts
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2026
·Vol. 16
·期 9
·761
·
IF 4.5
Haijian Yang,Changsen Zhang,Lianfeng Shang,Hanfang Feng,Na Xiao
Plastic waste has become a serious global issue. Thermal treatment of waste PET faces critical drawbacks including severe reactor clogging and low-value oxygen-rich bio-oil, restricting large-scale chemical recycling. Co-pyrolysis with hydrogen-rich low-density polyethylene (LDPE) over modified zeolite provides a viable route to overcome these barriers. In this study, reaction parameters including temperature, plastic/catalyst ratio and PET/LDPE ratio were optimized, and Fe-Ni bimetallic modified HZSM-5 was fabricated via impregnation to boost monocyclic aromatic hydrocarbons (MAHs) production. LDPE served as a hydrogen donor to facilitate PET deoxygenation via synergistic effects. At 550 °C with a plastic/catalyst ratio of 1:4 and PET/LDPE ratio of 2:3, the liquid yield hit 80.2%, and all detectable organic compounds in the liquid phase identified by GC–MS were aromatic hydrocarbons. Among all prepared mono- and bimetallic zeolites, 3Fe7Ni/HZ delivered optimal MAHs selectivity at 80.5%. This 20% promotion over unmodified HZSM-5 stems from balanced metal dispersion and tuned acid sites unique to Fe–Ni co-loading. This work offers a feasible strategy for converting waste plastics into high-value aromatics and further trials with varied metal contents will be needed to extend industrial applicability.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jinyu Pi,Mengjin Chen,Tianqi Chen,Qi Wang,Shijian Cheng,Chaoyang Fu
A combined experimental and theoretical study was performed on corrosion inhibition effect of 1-Phenyl-5-mercaptotetrazole (PMT) on nickel-aluminum bronze (NAB) in seawater . Gravimetric measurement and electrochemical method, such as the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS), Tafel polarization curve were used to verify the corrosion inhibition effect of PMT. It was found that the corrosion inhibition efficiency (IE) of PMT achieved 94.4 %, 99.5 %, 98.7 % at a concentration of 1.12 mM, respectively. The slump of the degree of corrosion on NAB surface was also revealed based on SEM and AFM images analysis with the addition of PMT. According to the Langmuir isotherm model based on EIS, PMT was confirmed as a mixed-type corrosion inhibitor between −20 kJ mol –1 and −40 kJ mol –1 . Besides, the successful adsorption of PMT on NAB has been revealed by the results of XPS and the change of water contact angle on NAB surface. In combination XPS with quantum chemistry calculations, PMT molecules are adsorbed on the surface of NAB by the active S atom and the tetrazole ring as the major adsorption groups, thus, the protective barrier formed by PMT on the surface of NAB can effectively insulate NAB from contact with seawater. The research results in this paper have showed that PMT as a drug intermediate has an excellent corrosion inhibition effect on the NAB at extremely low concentration in seawater.
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ADVANCED POWDER TECHNOLOGY
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2022
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IF 4.969
Zihan Zhou,Xingwen Wang,Rui Yu,Rongli Jiang,Yu Gao,Xueshuai Chen,Huilin Hou
In this paper, b-axis oriented ZSM-5 zeolite was synthesized by solvent-free method with ammonia as growth regulator. Zeolites were characterized by modern detection techniques such as XRD, SEM, BET and NH 3 -TPD. The results showed that ammonia could not only promote the crystallization of ZSM-5 zeolite, but also direct the synthesis of ZSM-5 zeolite with b-axis oriented morphology, which was beneficial to enhance the selectivity of light olefins. B-axis oriented ZSM-5 zeolite did not need to be mixed and aged in aqueous solution, which could reduce the discharge of sewage, and avoided the generation of autogenic pressure in the crystallization process. Furthermore, it is consistent with the concept of environmental friendliness, which could guide the green preparation of industrial ZSM-5 zeolites.
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JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Jiang Li,Heyang Liu,Zhidong An,Yue Kong,Lei Huang,Delong Duan,Ran Long,Piaoping Yang,Yuan-Ye Jiang,Jiaxing Liu,Junjie Zhang,Tong Wan,Jiayi Fu,Runze Pan,Xintian Wang,Dionisios G. Vlachos
Heteroatoms-doped carbon materials have recently emerged as effective catalysts for various chemical and electrochemical reactions. The free of metals especially noble metals reduces cost and eliminates issues like sintering or leaching of metals at elevated temperatures in solvents. In this work, selective hydrodeoxygenation (HDO) of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) is for the first time achieved over simple nitrogen-doped carbon (N-C) catalysts. At optimal reaction conditions, a 91% yield of DMF is obtained with excellent catalyst stability. Extensive characterization, including extended X-ray absorption fine-structure (EXAFS) and soft X-ray absorption spectroscopy (sXAS), model reactions, basic data science analysis, and DFT calculations suggest that ppm of Fe in particular FeN 3 sites formed in pyrolysis, rather than non-metallic elements, drive key steps such as H 2 activation and deoxygenation of –OH during HMF HDO.
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危险品化学品经营许可证（带存储）