JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Siwei Wang,Fusheng Pan,Honghao Su,Jing Huang,Jingyi Wu,Zhijie Yuan,Zhongyi Jiang
Molecular refining such as aromatics/alkanes separation has emerged as the dominant trend in the petrochemical industry, which can maximize the value of all feedstock molecules in naphtha. Covalent organic framework (COF) possesses exceptional structural design and functionalization flexibility, enabling facile incorporation of ordered structure and functional groups that can enhance the selective diffusion of aromatic components. Here, an imidazole-bearing COF (TpDAB) was designed and incorporated into Pebax matrix to prepare hybrid membranes for toluene/ n -heptane pervaporation separation. Imidazole groups selectively enhanced aromatics affinity by inducing p-orbital electron polarization in benzene rings. The imidazole-bearing COF can effectively maintain the pore size of the COF. The nanoscale pores of COF enabled rapid mass transfer. These features synergistically improved the flux and separation factor. Especially for the hybrid membrane with TpDAB content of 0.3 wt%, the highest performance was achieved with flux of 964 g m −2 h −1 and separation factor of 7.60 for 50 wt% toluene/ n -heptane mixture. Moreover, this study preliminarily explored the preparation of hollow fiber membrane (HFM), offering a potential pathway for the practical application of COF hybrid membrane.
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MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Xutong Duan,Yongfei Wang,Ruijie Guo,Baolong Niu,Huifang Wang,Hong Yan
To solve the problems of poor corrosion resistance, low adhesion and poor abrasion resistance of general superhydrophobic coatings, A superhydrophobic nano-SiO 2 /N-doped carbon dots ( N -CDs) was prepared on the surface of AZ31B magnesium alloy. The electrolyte consisted of nano-silica particles and N -CDs dispersion, where nano-SiO 2 particles were innovatively added to improve the abrasion resistance of the coating. After the superhydrophobic modification by 1 H ,1 H ,2 H ,2 H -perfluorooctyltriethoxysilane (PTES), the coating exhibited a water contact angle (WCA) of 154° and a rolling angle (RA) of 7°. The analysis undertaken via potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) demonstrated improved electrochemical performance for the coated magnesium alloy samples when compared with uncoated counterparts. The assemblies formed by the coordination of Mg 2+ with the functional groups of N -CD (−NH 2 , –COOH and –OH) were electrodeposited onto the surface of the magnesium alloy matrix, achieving a dense protective film and thereby slowing down the corrosion rate. At the same time, the abrasion resistance test results indicated that the prepared coating possessed excellent abrasion resistance, possessing the ability to resist damage to the coating caused by friction to a certain extent, proposing a new idea for fabricating superhydrophobic coatings with increased abrasion resistance on Mg alloys.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Xu Liu,Xuxu Zhai,Yuheng Zhao,Liang Shan,Zhongqing Liu,Yuefeng Liu
Sulfur element is widely applied as a non-metallic dopant into carbon framework for the modulation of their chemical activities. An interesting question is whether the intrinsic catalytic performances for the H 2 S selective oxidation to sulfur can be manipulated by sulfur element introduction into carbocatalysts. In this study, we employ a simple solvent-free method to introduce S atoms into framework of N-doped carbocatalysts, resulting in a notable enhancement of the product S selectivity with negligible loss of H 2 S selective oxidation. The experimental results show that the as-synthesized N-S-C-2 catalyst exhibits a H 2 S conversion of 97.5 % and sulfur selectivity of >80 % at a high O 2 -to-H 2 S ratio (2.5) under continuous mode (over the dew point temperature of sulfur, c.a. 210 °C), while also demonstrating robust stability (> 100 h), anti-CO 2 (up to 50 vol%) and anti-oxidation properties. Kinetic analysis and H 2 S/O 2 -TPD-MS results reveal that S introduction attenuates the adsorption and dissociation of H 2 S and O 2 by the N-doped carbon catalyst. Furthermore, density functional theory calculations elucidate that S doping elevates the adsorption energies of H 2 S and O 2 at the pyridinic N site, thereby moderately reducing the adsorption of H 2 S and O 2 , consequently preventing the over-oxidation of H 2 S to SO 2 and enhancing S selectivity. The double doping promotion effect of carbon materials reported in this investigation offers an alternative insight for the development of highly selective carbon desulfurization catalysts.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Zheyang Liu,Jianli Liang,Qianqian Song,Yang Li,Zhiquan Zhang,Min Zhou,Wei Wei,Hui Xu,Chun-Sing Lee,Huaming Li,Zhifeng Jiang
Efficient conversion of CO 2 to high value-added chemical products is a promising strategy for achieving carbon neutrality . Although the photocatalyst technique has been made widespread researched, highly efficient photoreduction CO 2 with metal-free photocatalysts remains a challenge. Herein, we report a zero-dimensional black phosphorus quantum dots (BPQDs)-decorated one-dimensional carbon nitride nanotubes (CNNT) photocatalyst that reduces CO 2 to CO with a rate of 44.6 μmol g –1 h –1 , which is better than the similar photocatalysts and pristine carbon nitride nanotubes . Synchrotron radiation XAFS measurements substantiate the construction of N-P electron transfer channels within BPQDs and CNNT. Time-resolved PL spectrum demonstrates the faster separated electron hole pairs . In situ irradiated X-ray photoelectron spectroscopy confirms the photogenerated-electron flow trend and the active site of photocatalytic reaction. Moreover, the main intermediate *COOH is verified by in situ FT-IR characterization which is corresponding to the previous research. The construction of atomic-level N-P charge transfer channel efficiently facilitates the charge transfer and accelerates the catalytic rate. This work provides a novel insight into the design of BPQDs-anchoring heterostructures for photocatalytic CO 2 reduction.
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MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Yingfeng Wang,Ziyi Liao,Ming Huang,Kaizhun Li,Nengyu Pan,Hao Hou,Wei Ma,Maoli Yin
Post-surgical site infections (PSSI) pose significant challenges in clinic treatment, and the antibacterial modification of medical materials is an effective strategy to combat these issues. In this work, a monomeric N-halamines (DCDMH) was doped in PCL matrix via electrospinning process, and further processed using a conventional twisting method to yield nanofiber-based yarns. The micro/nano-structure of the PCL-based electrospun nanofibrous yarns (ENYs) enables the effective release of N-halamines and exhibits suitable storage stability after 30 days. The N-halamine modified ENYs effectively inhibited 100 % of E. coli O157:H7, S. aureus , and C. albicans within 1 min, resulting impressive antimicrobial capacities. The effect of N-halamines dosage on the morphology and mechanical properties of fabricated ENYs was assessed. Furthermore, the in vitro degradation, hemocompatibility, and protein adsorption properties of the synthesized nanofibrous yarns were also evaluated. The prepared ENYs with good hemocompatibility and antimicrobial properties, suggesting a novel approach for the development of medical materials, specifically for surgical sutures materials.
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JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Huiling Yuan,Qihang Sun,Jinming Chang,Hejun Gao,Juan Zhang,Fang Liao,Hongquan Fu,Yunwen Liao
The rapid expansion of nuclear energy confronts ecological challenges, especially the analysis of heavy water (D 2 O) in radioactive wastewater. The unique red carbon (C 3 O 2 ) molecule spontaneously polymerizes into highly conjugated fluorescent structures, p(C 3 O 2 ) n , enabling us to deeply investigate their recognition mechanism for D 2 O, as aggregation-induced emission luminogens. Density functional theory calculations and experiments reveal the π–π stacking crystal structure of p(C 3 O 2 ) n nanosheets in an aggregated state, enhancing their fluorescence properties in solution. This allows for highly sensitive, fast (< 0.2 s), and stable detection of D 2 O, with a minimum detection limit of 2.91×10 −5 %, unaffected by external factors. The fluorescence quenching is attributed to hydrogen bond formation between -C=O groups and D 2 O's D atoms (static quenching) and intramolecular electron transfer (dynamic quenching). Thus, p(C 3 O 2 ) n polyesters serve as an effective luminescent probe for D 2 O sensing, offering a novel approach for designing conjugated fluorescent polyesters.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jihui Yao,Zhikang Xu,Shuo Cheng,Yuanyuan Yue,Haibo Zhu
The use of dodecahydro- N -ethylcarbazole in hydrogen storage for liquid organic hydrogen carrier systems holds potential for achieving large-scale application. In order to investigate the relationship between dodecahydro- N -ethylcarbazole dehydrogenation performance and Pt particles size, a series of monometallic Pt/Al 2 O 3 catalysts with different Pt particles size from 0.70 nm to 5.12 nm were controlled synthesized by a simple impregnation method. The obtained catalysts are systematically characterized via XRD, 27 Al MAS NMR, SEM-EDS, TEM, N 2 -adsorption, CO-IR, H 2 -TPR and NH 3 -TPD analyses, which provide essential micro-structure of these catalysts. The dehydrogenation of dodecahydro- N -ethylcarbazole over Pt/Al 2 O 3 is a typical consecutive reaction, which follows a reaction sequence of dodecahydro- N -ethylcarbazole → octahydro- N -ethylcarbazole → tetrahydro- N -ethylcarbazole → N -ethylcarbazole. These dehydrogenation steps are quite sensitive to the Pt particle size. Large Pt particle can greatly enhance the reaction rates in octahydro- N -ethylcarbazole → tetrahydro- N -ethylcarbazole and tetrahydro- N -ethylcarbazole → N -ethylcarbazole steps. However, these two steps are difficult to take place in small Pt particles. The high performance of large Pt particle in dehydrogenation can be ascribed to its highly exposed (1 1 1) crystal face. The optimized catalyst Pt 5.0 /γ-Al 2 O 3 with Pt average size of 4.63 nm demonstrated exceptional performance in dodecahydro- N -ethylcarbazole dehydrogenation at 180 °C and 101 kPa, and the dodecahydro- N -ethylcarbazole conversion of 100 %, N -ethylcarbazole selectivity of 96.44 % and dehydrogenation efficiency of 98.73 % can be achieved. These results provide valuable insights for the development of efficient metal-based catalysts for liquid organic hydrogen carriers hydrogen storage system.
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FlatChem
·
2024
·
IF 5.9
Siqi Gong,Jing Li,Fan Zhao,Mengdie Yan,Chenghao Huang,Guanzhong Huo,Chunli Li,Bing Wu,Jiapeng Liu
The emerging energy-saving and environmentally friendly capacitive deionization (CDI) technology has attracted more and more attention. However, it remains a great challenge to develop CDI electrode materials with excellent comprehensive properties. Herein, the porous N, P co-doping Ti 3 C 2 T x MXene (N, P-Ti 3 C 2 T x ) was prepared successfully by combining simple flocculation with an annealing process. Benefitting from the synergistic effect of the combination of porous structure and co-doping of N and P heteroatoms, the N, P-Ti 3 C 2 T x exhibits substantial specific surface area, which provides more surface bounding active sites for electrochemical reactions, thus assisting to boost the CDI performance. As a result, the N, P-Ti 3 C 2 T x exhibited an admirable salt (Na + ) adsorption capacity of 53.3 mg g −1 and exceptional recycling property. Impressively, the N, P-Ti 3 C 2 T x also exhibited superior desalination performance of Pb 2+ , characterized by an exceptionally high desalination capacity of up to 168.2 mg g −1 at 1.2 V, and the corresponding desalination rate reached 0.047 mg g −1 s −1 . Additionally, the deionization mechanism involved was elucidated through a series of characterizations. This work will furnish an effective avenue for the innovative design of MXene-based electrode materials toward high-performance CDI.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 10
·1-13
·
IF 2.4
Chen Shiqi,Huang Zhixuan,He Wentao,Wang Xinyu,Yang Zhiwei,Zhang Jing
Molybdenum nitride, because of the strong metal-support interaction between nitrogen and the metal, exhibits activity superior to that of bare metals, demonstrating its effectiveness as a co-catalyst to address the slow kinetics of the iron reduction in the Fenton process. Here, we introduced Mo 2 N as a co-catalyst to accelerate the cycles of Fe 3+ /Fe 2+ within a Fenton-like system consisting of Fe 3+ and H 2 O 2 , thereby enhancing the activation of hydrogen peroxide to generate reactive oxygen species (ROS). The system demonstrates excellent recyclability and stability. XPS spectroscopic analyses reveal that Mo(III) and Mo(IV) species on the Mo 2 N surface are capable of reducing free Fe(III), while FTIR analyses show nitrogen (N) and nitrogen oxide (NO x ) facilitate the adsorption and coordination of iron. Both homogeneous and heterogeneous reduced iron species are active in the activation of H 2 O 2 . EPR spectroscopy further confirms that the primary ROS generated are hydroxyl radicals (·OH) and superoxide anions (·O 2 − ). This study not only underscores the feasibility of Mo 2 N-based Fenton-like systems but also provides a new strategy for promoting the practical application of Fenton chemistry. Graphical
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TOXICOLOGY LETTERS
·
2020
·
IF 3.569
Jianxin Ye,Kangnan Zhang,Xindi Yuan,Haosen Ji,Miner Hu,Tongliang Huang,Ren-Shan Ge
Di -n- hexyl phthalate (DNHP) is commonly used as a plasticizer. However, whether DNHP influences Leydig cell development during puberty remains unexplored. In this study, DNHP (0, 10, 100, and 1000 mg/kg) was administered via gavage to 35-day-old male Sprague-Dawley rats for 21 days. Serum levels of testosterone, luteinizing hormone, follicle-stimulating hormone, Leydig cell number, the expression of Leydig and Sertoli cell genes and proteins were investigated. DNHP significantly increased serum testosterone levels at 10 mg/kg but lowered its level at 1000 mg/kg. DNHP significantly increased luteinizing hormone levels at 1000 mg/kg without affecting follicle-stimulating hormone levels. DNHP increased Leydig cell number at all doses but down-regulated the expression of Lhcgr , Hsd3b1 , Hsd17b3 , and Hsd11b1 in Leydig cell per se at 1000 mg/kg. DNHP elevated phosphorylation of ERK1/2 and GSK-3β at 10 mg/kg but decreased SIRT1 and PGC-1α levels at 1000 mg/kg. In conclusion, DNHP exposure causes Leydig cell hyperplasia possibly via stimulating phosphorylation of ERK1/2 and GSK-3β signaling pathways.
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高影响因子
JOURNAL OF PHARMACEUTICAL SCIENCES
·
2016
·
IF 2.641
Juan Hu,He-Yu Li,Gareth R. Williams,Hui-Hui Yang,Lei Tao,Li-Min Zhu
Fibers of poly(N-isopropylacrylamide) (PNIPAAm), ethyl cellulose (EC), and a blend of both were successfully fabricated by electrospinning. Analogous drug-loaded fibers were prepared loaded with ketoprofen (KET). Scanning and transmission electron microscopy showed that the fibers were largely smooth and cylindrical, with no phase separation observed. The addition of KET to the spinning solutions did not affect the morphology of resultant fibers, and no drug particles could be observed to separate from the polymer matrix. X-ray diffraction demonstrated that the drug was present in the amorphous physical form in the fiber matrix. There are significant intermolecular interactions between KET and polymers, as evidenced by IR spectroscopy and molecular modeling . Water contact angle measurements proved that the PNIPAAm and PNIPAAm/EC fibers switched from being hydrophilic to hydrophobic when the temperature was increased through the lower critical solution temperature of 32°C. In vitro drug release studies found that the PNIPAAm/EC blend nanofibers were able to synergistically combine the properties of the 2 polymers, giving temperature-sensitive systems with sustained release properties. In addition, they were established to be nontoxic and suitable for cell growth. This study demonstrates that electrospun-blend PNIPAAm/EC fibers comprise effective and biocompatible materials for drug delivery systems and tissue engineering.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Ziyi Wang,Zhilong Xu,Xiangdong Xu,Juqun Xi,Jie Han,Lei Fan,Rong Guo
Noble metals act as nanozymes that can generate reactive oxygen species (ROS) by catalysis to induce apoptosis of tumor cells for cancer therapy. But they are easy to aggregate, which will affect their further application. Carbon materials are often used as the carrier of noble metals to improve their catalytic performance. However, designing a composite structure to build an efficient carbon/noble metal hybrid nanozyme with high catalytic performance for tumor therapy is still a significant challenge. In this work, a core-in-shell structure nanozyme composed of gold nanoparticles (AuNPs) embedded in nitrogen-doped hollow carbon nanoshells (AuNPs@N-HCNs) were fabricated, which exhibited peroxidase-like (POD-like) and oxidase-like (OXD-like) activity. Compared with core-out-of-shell structure composite, the AuNPs@N-HCNs showed a better ability to generate ROS to kill tumor cells. Furthermore, AuNPs@N-HCNs also exhibited satisfactory photothermal conversion properties, which helped build a platform for photothermal therapy. Meanwhile, the enzyme activity produced by AuNPs@N-HCNs increased significantly under light irradiation . Comparing the size of AuNPs in carbon shell, 15 nm AuNPs were better than 2 nm in both enzyme-like activities and in vivo therapeutic effect. In vitro and in vivo studies demonstrated that under the synergistic effect of light-enhancing nanozyme catalysis and photothermal therapy, AuNPs@N-HCNs could induce cancer cell apoptosis and destroy tumors effectively, which provided evidence for the feasibility of tumor catalytic-photothermal treatment.
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