JOURNAL OF APPLIED POLYMER SCIENCE
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2025
·
IF 2.8
Yuanpeng Cai,Danyang Li,Yufei Ling,Huihui Jiang,Hui Liu
A novel triple-responsive composite hydrogel, p(NIPAM-co-MAA-co-SPMA), was designed and synthesized via free radical polymerization, incorporating N-isopropylacrylamide (NIPAM) for temperature responsiveness, methacrylic acid (MAA) for pH sensitivity, and spiropyran methacrylate (SPMA) for light responsiveness. This study aimed to develop a novel stimuli-responsive sustained release drug delivery system. The composition and structure of the hydrogel were characterized by nuclear magnetic resonance spectroscopy (NMR), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Doxorubicin (DOX) was used as a model drug to evaluate loading and release behavior. The hydrogel achieved a drug loading content (DLC) of 25.7% and a drug loading efficiency (DLE) of 74.3% and enabled controlled release with approximately 89% cumulative DOX release within 6 h under combined thermal, acidic, and ultra-violet light stimuli. Cytotoxicity assays and cellular uptake studies confirmed the excellent biocompatibility of the hydrogel and its efficacy in suppressing cancer cell growth. These results highlight the potential of p(NIPAM-co-MAA-co-SPMA) as an intelligent platform for on-demand targeted anticancer therapy.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Sijin Zuo,Shengcai Zhu,Jiaying Wang,Weiping Liu,Juan Wang
A N/O-codoped carbon-based catalyst (N/O-C-8) designed with dual reaction sites (pyridinic N and carbonyl group) was fabricated in this work, for persulfate based advanced oxidation reaction. The pyridinic N served as the adsorption site for target molecule, via series of high resolution XPS analysis and DFT calculation. Meanwhile, the carbonyl group functioned as the persulfate activation site, to generate oxidative 1 O 2 . Engineering and isolating the two reaction sites on catalyst surface can greatly shorten the migration distance from 1 O 2 to target organic molecule, resulting in good catalytic removal efficiency. As demonstrated, during a 4-hour continuous flow experiment, our catalyst showed stable and efficient removal of tetracycline, with a flow rate of 4 mL/min. The study provides keen insights into the design of effective non-metal based catalysts for practical water remediation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Shuai Li,Yimei Zhang
Enhancing the energy efficiency of hydrogen evolution reaction (HER) represents a significant yet challenging goal. One promising approach to achieve this is developing catalysts with high activity and robust stability to couple HER with Fenton reaction. Herein, mesoporous nanosheet arrays (MNA) with featuring a mean pore size of 25 nm, was fabricated via a hydroxide precursor annealing strategy. The produced Co-P MNA 25 and Fe-Co-P MNA 25 are applied in HER and Fenton reaction, respectively. Compared to the MNA 12 synthesized by traditional method of self-growth and solid-phase phosphorization, the MNA 25 exhibited remarkable enhancement in performance, including a 49 % reduction in HER overpotential at 10 mA cm −2 , a 41 % increase in pseudo-first-order degradation kinetics of methylene blue in Fenton reaction, along with superior stability. In addition, the MNA 25 based flow reactor, which couples the two reaction and features a fastener-free design, demands just a minimal voltage of 1.61 V to drive, demonstrating impressive energy efficiency (81.56 % for HER and 2.77 g kWh −1 for Fenton) and application potential. More importantly, numerical simulations reveals that the larger pore size in MNA not only facilitated faster electrolyte diffusion, but also enhanced its impact buffer performance, thereby improving its catalytic activity and stability. Our work unveils the mechanism of mesopore size on the electrochemical performance of catalysts at the theoretical level, which offers a promising avenue for enhancing the energy efficiency of HER.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Qing Xu,Jianyi Lu,Zhiyong Zhou,Yujia Jin
Synthesis of zeolite from industrial wastes has become an important environmental protection strategy. This study explored the synthesis of nano-sized NaX and NaY zeolites from coal/rice husk co-combustion ash (co-ash) using alkali-melting-hydrothermal synthesis and seed guiding methods, followed by modification with Li + and K + exchange. NaY zeolite, synthesized at a SiO 2 /Al 2 O 3 ratio of 5 and crystallization temperature of 100 °C, exhibited the most complete crystal structure and optimal CO 2 adsorption capacity. The specific surface area (SSA) of NaX and NaY zeolites (583.0 m 2 /g and 790.1 m 2 /g, respectively) are comparable to those of commercial zeolites, emphasizing their structural parity, and demonstrating their potential as effective CO 2 adsorbents. NaY demonstrated a CO 2 adsorption capacity of 5.31 mmol/g at 298.15 K and 1 bar, competitive with other conventionally synthesized and commercial zeolites. Cation exchange had a minimal impact on CO 2 adsorption of NaY, with LiX improving capacity by 11.65 % compared to NaX, while LiY showed only a 2.94 % increase. K + exchange negatively affected both zeolites. Kinetic and thermodynamic analyses, using the proposed first-order (PFO) and Langmuir-Freundlich models, indicated that CO 2 adsorption is a rapid physisorption process with thermal effects ranging from 22 to 41 kJ/mol. Both zeolites exhibited excellent CO 2 /N 2 selectivity and regeneration stability, with the loss of adsorption capacity retaining only 10.57 % and 9.63 % for NaX and NaY after fifteen cycles. This highlights their potential as efficient CO 2 adsorbents.
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WATER RESEARCH
·
2025
·
IF 12.4
Kexin Yin,Yufeng Tang,Zisen Li,Han Zhao,Xing Xu,Qian Li,Qinyan Yue,Yue Gao,Baoyu Gao
Understanding and controlling the structure-activity relationship of single atom catalysts (SACs) is crucial for optimizing their catalytic performance. This study investigated the influence of montmorillonite (MT) as a support material on the microstructure of SACs, and how these influences modulate the catalytic performance and mechanism of peroxymonosulfate (PMS) activation. The enrichment effect within the MT interlayer space significantly enhanced the interaction between organic pollutant molecules, PMS, and active sites, thereby improving adsorption capacity and mass transfer efficiency. This enhancement increased the likelihood of subsequent peroxide bond cleavage, enabling the system to exhibit a greater capacity to generate high-valent Co (IV)-oxo and free radicals (SO 4 •− and • OH), leading to a higher removal efficiency of sulfamethoxazole (SMX). The introduction of MT altered the pathway of SMX removal, and the CoSAC@MT/PMS system predominantly degraded SMX into intermediate products with lower molecular weights and negligible fluorescence signals. Additionally, the incorporation of MT significantly boosted the yield of SACs synthesized via traditional pyrolysis methods, offering a novel strategy to reduce preparation costs and achieve large-scale synthesis.
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-11
·
IF 6.408
Sun Wenying,Wang Nan,Zhou Xiaobin,Sheng Yuxuan,Su Xingguang
A Co, N co-doped porous carbon-based nanozyme (Co–N-C nanozyme) has been fabricated. Taking advantages of the excellent oxidase catalytic activity and significant stability of Co–N-C nanozyme, we propose a fluorescence and colorimetric system based on Co–N-C nanozyme and red-emitting carbon quantum dots (RCDs) for butyrylcholinesterase (BChE) sensing. As the chromogenic substrate 3,3′,5,5′-tetramethylbenzidine (TMB) was catalyzed and oxidized by Co–N-C nanozyme, the generated oxTMB had a new absorption peak at 652 nm, which resulted in the significant quenching of the fluorescence of the carbon quantum dots at 610 nm. Under the catalysis of BChE, thiocholine was generated from the hydrolysis of S-butyrylthiocholine iodide (BTCh), and the as-generated thiocholine effectively inhibited the oxidation of TMB catalyzed by Co–N-C nanozyme, leading to a decrease of the absorption of oxTMB at 652 nm and effective fluorescence recovery of RCDs. By measuring the absorbance of produced oxTMB at 652 nm and the fluorescence of RCDs at 610 nm, the fluorescence and colorimetric system both exhibited an outstanding linear response to the activity of BChE in the range 0.5 to 40 U L −1 , with a detection limit of 0.16 U L −1 and 0.21 U L −1 , respectively. Furthermore, this established dual-channel biosensing strategy has been successfully applied to the determination of BChE in human serum samples. The present work has effectively expanded the development and application of nanozyme in biosensing. Graphical abstract
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
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IF 16.683
Xianghai Song,Xin Li,Xinyu Zhang,Yuanfeng Wu,Changchang Ma,Pengwei Huo,Yongsheng Yan
Photocatalytic reduction of CO 2 to hydrocarbon fuels is an ultimate and utmost strategy to resolve the ever-increasing environmental problems and energy crisis. Our study aimed to develop a specific type of photocatalysts with increasing light utilization efficiency, reducing electron-hole recombination rate and enhancing photocatalytic activity by integrating unique donor-acceptor systems into the polymeric network of graphitic carbon nitride (g-CN). The results of the characterization showed that C and O are successfully integrated into the framework of g-CN. The O-containing and C-containing section of the as-prepared catalysts (OCCNx) play the role of donor and acceptor, respectively. The donor-acceptor systems of OCCN x offer an extra electron transfer transition mode, which dramatically extends the optical absorption range, and narrows down the bandgap of g-CN from 2.74 to 2.03 eV. Also, the donor-acceptor systems significantly improve the delocalized ability of the photoinduced charge carriers, which efficiently prolongs the lifetime of the charge carriers and reduces the electron-hole recombination rate, as all of these are all beneficial for boosting the photocatalytic activity of the catalysts. Experimental results show that OCCN 0.25 displays the best photocatalytic CO 2 reduction performance with a CO production rate of 34.97 μmol g −1 in 4 h, which is 4.3-fold higher than that obtained in the case of bulk g-CN. Moreover, the reaction is performed in water without any co-catalyst and sacrificial agent, which makes it a green and environmentally friendly reaction. Results obtained from DFT simulation agree well with the empirical results, and a possible reaction mechanism is suggested based on these calculations.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2026
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IF 7.9
Haifeng Jiang,Jiahao Qi,Jian Xing,Hanwen Zhou,Zheng Cao
The co‑catalytic pyrolysis of waste polyethylene terephthalate (PET) with urea under an Ar atmosphere offers a sustainable route to prepare high‑value aromatic nitriles from plastic‑waste recycling. However, low aromatic nitrile yields greatly hinder the scaled-up deployment and practical use of this PET pyrolysis strategy. This work uses transition metal (Ni, Cu, Mn)-doped Zn-Co spinel catalysts to regulate the product distribution during the catalytic pyrolysis of PET-urea mixtures to produce aromatic nitriles. The results reveal that the nickel-doping spinel catalyst exhibits the optimal promotion effect. After adding 10 wt% catalyst with a total mass of PET-urea mixture, the normalized GC-MS peak-area percentages of nitrogen-containing compounds and nitriles in liquid condensate reach 94.6% and 52.3% at 550 ℃, respectively. Compared with the non-catalyst system, the relative contents of nitrogen-containing compounds and nitriles increased by 7.95% and 30.39%, respectively. Among all aromatic nitriles, 1,4-benzenedicarbonitrile shows a relative proportion of 22.7%. Further results indicate that the Ni-doped spinel catalyst facilitates the formation of C N-containing intermediates during the PET-urea co-pyrolysis process. This work presents a catalytic method to raise the relative content of aromatic nitriles in condensed liquid from the argon‑atmosphere PET‑urea catalytic co‑pyrolysis.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Shanhai Zhao,Chunhe Li,Kuankuan Ren,Zebo Fang,Ping Fang,Yanyan Zhu,Pengfei Fang
Photothermal catalytic CO 2 reduction is an attractive way to alleviate the current energy crisis, but it is important to prepare catalysts with efficient catalytic capacity. In this work, Prussian blue analogs were firstly prepared, and then calcined to obtain porous transition metal (Ni, Co, Fe) oxides (TMOs). The metal composition of catalysts has great influences on their structures and catalytic properties. Among them, NCF-TMO catalyst shows excellent photothermal catalytic performance, and can produce 2.9 mmol g -1 h -1 CO and 1.6 mmol g -1 h -1 mmol CH 4 at low CO 2 and H 2 concentrations. For the NCF-TMO, its superior catalytic performance mainly benefitted from two reasons: (1) The construction of heterojunction between NiO, Co 3 O 4 and Fe 2 O 3 , which promotes the efficient dynamic processes of charge carriers; (2) The formation of abundant surface reactive active sites facilitates the efficient conversion of CO 2 molecules. This study offers a bright direction for the resource utilization of CO 2 .
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Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 22
·11163-11170
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IF 8.867
Lifeng Hang,Yiqiang Sun,Dandan Men,Shengwen Liu,Qian Zhao,Weiping Cai,Yue Li
Hierarchical micro/nanostructured C doped Co/Co3O4 hollow spheres were prepared by two-step treatment (annealing at 600 °C in an Ar atmosphere and then at 250 °C in air) of PS@Co(OH)2 core–shell structures templated from PS microspheres without any modification. In 1 M KOH, such hollow nanospheres showed an overpotential of 352 mV at a benchmark oxygen evolution reaction (OER) current density of 10 mA cm−2, which was lower than that of RuO2 (364 mV), Co3O4 hollow nanospheres (410 mV) and C-Co/Co3O4 nanoparticles (462 mV). Importantly, the C-Co/Co3O4 hollow spheres exhibited a small onset potential (1.49 V) due to their more active sites, higher electrical conductivity, larger specific surface area, and excellent electron and ion diffusion permeability. This work provides a strategy to design and fabricate earth-abundant, low-cost electrocatalysts for water splitting in practical applications.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2019
·
IF 2.606
Shaohui Xu,Zhu Jin,Zhipeng Zhang,Wei Huang,Yuanyuan Shen,Zhongmin Wang,Shengrong Guo
It is necessary for effective combinational effects that multiple chemotherapeutic agents enter and act on the same tumor cells simultaneously at a suitable ratio. Due to their individual physicochemical or biopharmaceutical properties, they cannot reach the same cells at its predetermined ratio after co-administration. Herein, we report a novel system with precise ratiometric co-loading, co-delivery and intracellular co-release of paclitaxel (PTX) and curcumin (CUR), to investigate their synergistic effects. We prepared the system by conjugating PTX and CUR at different ratios onto the same gold nanorods (GNRs). We demonstrated that PTX and CUR could be precisely ratiometric co-loaded to form dual-drug conjugated biotin-PEG modified GNRs (abbreviated as PTX/ [email protected] ), which could co-deliver dual drugs into tumor cells with a predetermined ratio and co-release them intracellularly. The PTX/ [email protected] with the mass ratio of PTX and CUR at 1:1 exhibited the best synergistic effect on multidrug resistant MCF-7/ADR cells while the free PTX and CUR mixture with the mass ratio of at 1:0.75 displayed the strongest synergism. Cytotoxicity studies showed that PTX/ [email protected] are superior to free drug mixture. Furthermore, PTX/ [email protected] could remarkably induce apoptosis of MCF-7/ADR cells under near-infrared irradiation. Moreover, we found that PTX/ [email protected] significantly inhibited P-glycoprotein (P-gp) expression in MCF-7/ADR cells.
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RARE METALS
·
2022
·Vol. 42
·期 1
·146-154
·
IF 6.318
Wu Yun-Feng,Ma Ji-Wei,Huang Yun-Hui
Designing highly active and durable electrocatalysts towards oxygen reduction reaction (ORR) plays a paramount importance for proton exchange membrane fuel cells. Pt-based binary alloys Pt-M (M = 3d-transition metals) possessing excellent electronic and geometric properties have received increasing interests as highly active electrocatalysts. Herein, we report a series of Pt x Co/C ( x = 1, 2, 3) catalysts by a facile one-pot soft-chemistry method. In the acidic conditions, the mass activities of PtCo/C, Pt 2 Co/C and Pt 3 Co/C are 0.526, 0.462 and 0.441 A·mg Pt −1 , which are 2.60, 2.31 and 2.22 times higher than that of Pt/C (0.200 A·mg Pt −1 ), respectively. The specific activities of PtCo/C, Pt 2 Co/C and Pt 3 Co/C are 706.59, 679.41 and 801.83 μA·cm −2 , which are accordingly 2.89, 2.76 and 3.28 times higher than that of Pt/C (244.75 μA·cm −2 ). Notably, Pt 3 Co/C shows a remarkable durability. After 5000 cycles of the accelerated durability testing, the mass activity and specific activity of Pt 3 Co/C catalyst are 2.47 and 3.80 times higher than that of the commercial Pt/C, respectively. The improved ORR activity and durability can be ascribed to the synergistic interaction between Pt and Co. Graphical
研究领域:
电催化
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纳米材料
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能源化学
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燃料电池
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表面科学
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材料化学
·
物理化学
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危险品化学品经营许可证（带存储）