APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Shuaishuai Ding,Chunhua Zhang,Yefei Liu,Hong Jiang,Rizhi Chen
Highly efficient Pd@CN catalysts for selective hydrogenation of phenol to cyclohexanone in water were successfully fabricated by loading Pd nanoparticles (NPs) in N-doped carbons (CN) derived from ZIF-67 with dicyandiamide (DICY) as the additional nitrogen source. For comparison, polyvinylpyrrolidone (PVP) was also used as the additional nitrogen source during the ZIF-67 synthesis. The results showed that the PVP and DICY had significantly different impacts on the microstructures of as-obtained CN materials and the catalytic performance of Pd@CN catalysts in the phenol hydrogenation. The addition of DICY had the positive promotion effect on the surface area of the obtained CN materials. Moreover, the introduction of DICY could increase the nitrogen content of CN and then prevent the re-oxidation of Pd NPs during air contact, resulting in higher Pd 0 ratio. In comparison with PVP, the DICY was more suitable as the additional nitrogen source for the formation of CN and Pd@CN (Pd@CN D , Pd@CN P ). The Pd@CN D exhibited superior catalytic activity as compared to Pd@CN P (phenol conversion 96.9% vs. 67.4%). More importantly, the as-prepared Pd@CN D catalyst could be reused for four times without catalytic performance reduction. The work would aid the development of Pd@CN catalysts with superior catalytic properties.
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Small
·
2016
·Vol. 12
·期 40
·5564-5571
·
IF 8.315
Ming Zhong,Donghui Yang,Chenchao Xie,Zhang Zhang,Zhen Zhou,Xian-He Bu
Manganese oxides (MnO x ) are promising anode materials for lithium ion batteries, but they generally exhibit mediocre performances due to intrinsic low ionic conductivity, high polarization, and poor stability. Herein, yolk–shell nanorods comprising of nitrogen-doped carbon (N–C) coating on manganese monoxide (MnO) coupled with zinc manganate (ZnMn 2 O 4 ) nanoparticles are manufactured via one-step carbonization of α -MnO 2 /ZIF-8 precursors. When evaluated as anodes for lithium ion batteries, MnO@ZnMn 2 O 4 /N–C exhibits an reversible capacity of 803 mAh g −1 at 50 mA g −1 after 100 cycles, excellent cyclability with a capacity of 595 mAh g −1 at 1000 mAg −1 after 200 cycles, as well as better rate capability compared with those non-N–C shelled manganese oxides (MnO x ). The outstanding electrochemical performance is attributed to the unique yolk–shell nanorod structure, the coating effect of N–C and nanoscale size.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 11
·729
·
IF 5.4
Wang Mengjun,Huang Rong,Yang Xinwen,Zeng Minghao,Wang Huizhen,Luo Xiaojun
A ratiometric fluorescence probe was developed by integrating a covalent organic framework (TP-BDB-COF) with N-doped quantum dots (N-CDs) encapsulated in zeolitic imidazolate framework-8 (N-CDs@ZIF-8), enabling highly sensitive and selective detection of hypochlorite (ClO⁻) in aqueous environments. The yellow-orange-emissive TP-BDB-COF, synthesized by the condensation of 2,4,6-triformylphloroglucinol (TP) and 3,3’-dimethyl-[1,1’-biphenyl]-4,4’-diamine (BDB), exhibited specific fluorescence quenching at 570 nm upon interaction with ClO⁻. The blue-emissive N-CDs@ZIF-8 served as a stable reference signal at 430 nm, enabling self-calibration via the ratiometric signal (F 430 /F 570 ). This dual-signal strategy significantly improved detection accuracy and reliability. This sensor exhibited a broad linear fluorometric response range of 0.05 to 200 µM for ClO⁻, with an exceptionally low detection limit of 22 nM. Moreover, its practical applicability was validated through analysis of real water samples, yielding satisfactory spike recoveries between 98.53% and 101.30%. This approach not only offers a robust method for monitoring ClO⁻ in complex matrices but also provides a versatile framework for constructing high-performance ratiometric sensors. Graphical abstract
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MOLECULES
·
2024
·Vol. 29
·期 20
·4860
·
IF 4.2
Fuyan Zhang,Miaomiao Ma,Shuang Li,Yuting Zhou,Jian Zeng,Meiqi Huang,Qi Sun,Tao Le
In the critical domain of wastewater treatment, the development of cost-effective, durable, and recyclable adsorbents with high adsorption capacities remains a significant challenge. This study introduces a novel magnetic bimetallic Metal–Organic Framework (MOF) adsorbent, MZIF-67-Co/Cu, doped with copper ions. The MZIF-67-Co/Cu adsorbent was successfully synthesized and structurally characterized, demonstrating remarkable selectivity for removing methyl orange (MO) from water. This high selectivity is attributed to the adsorbent’s high porosity and Lewis base properties at the coordinating metal ion center. The incorporation of Cu ions significantly enhances the porous architecture and increases the number of metal adsorption sites, leading to an impressive maximum MO adsorption capacity of 39.02 mg/g under optimized conditions (0.5 g/L adsorbent concentration, pH 3.0, 250 rpm agitation speed, adsorption time > 10 min). The adsorption kinetics closely follow the pseudo-second-order model, and the isotherm data fit well with the Langmuir model. The primary adsorption mechanisms involve electrostatic attraction and mesoporous interaction. This study highlights MZIF-67-Co/Cu as a highly efficient adsorbent with magnetic recovery capabilities, positioning it as a promising candidate for addressing critical issues in wastewater treatment.
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ACS Biomaterials Science & Engineering
·
2024
·
IF 5.4
Yilin Mao,Liang Wang,Zhengyi Xu,Wenjia Xie,Yuting Wang,Wei Qiao,Zhou Zhu,Jian Wang
In recent years, nanomaterials have gained widespread use in the biomedical field, with ZIF-8 and ZnO emerging as promising candidates due to their remarkable performance in osteogenesis, angiogenesis, and antimicrobial therapy. However, before advancing these nanomaterials for clinical applications, it is imperative to evaluate their biocompatibility. In particular, comparing nanomaterials with similar biomedical functions is crucial for identifying the most suitable nanomaterials for further development and market entry. Our study aimed to compare the biocompatibility of nano-ZIF-8 and nano-ZnO under the same conditions. We found that nano-ZIF-8 exhibited lower toxicity both in vitro and in vivo compared to nano-ZnO. To gain insights into the underlying mechanisms responsible for this difference, we conducted further experiments to investigate lysosome damage, mitochondrial change, and the occurrence of ferroptosis. Additionally, we performed transcriptome sequencing to analyze the expression of relevant genes, thereby providing robust validation for our findings. In summary, our study highlighted the importance of evaluating nanomaterials with similar biomedical effects. Through this comparative study, we have not only shed light on the superior biocompatibility of nano-ZIF-8 over nano-ZnO, but also contributed valuable insights and methodological references for future material screening endeavors. Ultimately, our study served as a stepping stone toward the development of safer and more effective nanomaterials for various biomedical applications.
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TALANTA
·
2025
·
IF 6.1
Ninghan Tang,Chaoting Shi,Xiandeng Hou,Hui Xin,Lan Wu
Excessive use of tetracycline poses risks to human health and the ecological balance, which poses challenges to develop a method for facile and reliable detection of tetracycline. Herein, the MoS 2 QDs@ZIF-8 was prepared through a simple method, serving as an asynchronous response sensor for the naked-eye detection of tetracycline. The photoinduced electron transfer between the composite sensor and target tetracycline led to quench the blue fluorescence emitted by MoS 2 QDs. Hydrogen bond, chelation, π-π stacking and pore effect between the composite sensor and tetracycline made the aggregation of tetracycline, significantly enhancing the intrinsic yellow fluorescence of tetracycline. Moreover, it also exhibited good detection performance for the real samples such as river water, farm wastewater, honey and milk, demonstrating that it was suitable for naked-eye visualization detection in the field. This work provided a novel approach for constructing ratiometric fluorescence sensors with asynchronous response.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Xiangyang Liu,Jin Wang,Longhui Fang,Yutao Ban,Maogang He
Due to the high Global Warming Potential (GWP) of hydrofluorocarbons (HFCs), the Kigali Amendment to the Montreal Protocol explicitly calls for the phase-out or limited use of HFCs, and the replacement of HFCs by hydrofluoroolefins (HFOs) is imminent. Therefore, it is particularly significant to develop new technology to separate valuable difluoromethane (R32, GWP = 675) from the near-azeotropic refrigerant blend R410A (GWP = 2088), because the traditional distillation is not applicable. In this work, aiming to enhance the separation performance of mixed matrix membrane (MMMs) for R410A, 5-fluorobenzimidazole was introduced into ZIF-71 by the solvent assisted linker exchange (SALE) method for the first time to reduce the pore size of fluorinated ZIF-71 by benzene rings and form hydrogen bonds between R32 with ZIF-71. A novel series of MMMs consisting of fluorinated ZIF-71 and Poly(ether-block-amide) ®1657 (Pebax®1657) polymer were prepared to separate the components of the R410A. The separation performance of the MMMs was investigated at different feed pressures and filler loading. The results showed that the introduction of 5-fluorobenzimidazole contributed to a significant increase in R32 permeability and R32/R125 selectivity of the MMMs compared to pure Pebax membrane. The 15 wt% ZIF-71-F/Pebax MMM showed the best separation performance with R32/R125 selectivity up to 26.6, four times that of pure Pebax membrane and twice that of ZIF-71/Pebax MMM. The ZIF-71-F/Pebax MMM have outstanding data on R32/R125 selectivity and no significant disadvantage in permeability, far exceeding the reported separation performance of membranes for R410A. This confirms that the application of fluorinated metal organic frameworks (MOFs) to the separation of refrigerant blends is a promising strategy.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Guang Yang,Jin Liang,Tian Lei,Yaxi Zhang,Li Zhang
Transition metal phosphides (TMPs) have emerged as promising candidates for the hydrogen evolution reaction (HER) due to their tunable phases and electronic structures. However, the development of bifunctional electrocatalysts that effectively balance HER and oxygen evolution reaction (OER) for overall water splitting presents a significant challenge. In this work, we report a novel cauliflower-like bimetallic phosphide, CoMo-P, synthesized on ZIF-67-derived NiCo layered double hydroxide (LDH) through a formic acid-assisted electrochemical phosphating process. This innovative approach not only enhances catalytic efficiency for both HER and OER but also offers a rapid, environmentally friendly, and straightforward fabrication method. The incorporation of formic acid during the electrodeposition process plays a crucial role in optimizing the catalyst's composition and microstructure. Specifically, formic acid facilitates the reduction rate of hypophosphite and stabilizes charged intermediates, thereby reducing the electrodeposition energy barrier and enhancing phosphating efficiency. As a result, the CoMo-P(NCL)/NF electrode demonstrates exceptional HER performance in alkaline media, achieving overpotentials of 55 mV and 108 mV at current densities of 10 and 50 mA cm ‑ 2 , respectively, significantly outperforming the control sample without formic acid addition (η 10 = 80.4 mV, η 50 = 142 mV). Moreover, the electrode exhibits remarkable OER activity with overpotentials of 273 mV and 310 mV at 10 and 50 mA cm ‑ 2 , respectively. When employed as a bifunctional catalyst for overall water splitting, the CoMo-P(NCL)/NF electrode pair requires a low cell voltage of 1.574 V to achieve a current density of 10 mA cm ‑ 2 , surpassing the performance of numerous reported bifunctional catalysts. This study provides a promising strategy for the rational design and practical application of high-performance bifunctional electrocatalysts in sustainable energy conversion systems.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Yue Wang,Yaning Li,Meiwen Cao,Zeyu Yan,Fenggang Wei,Tianhao Ma,Ruochen Xie,Hongchao Ma
Tumor hypoxia, limited H 2 O 2 levels, and abundant glutathione (GSH) in the tumor microenvironment (TME) pose challenges for high-efficiency reactive oxygen species (ROS)-mediated therapies. To address these limitations, an intelligent ROS-mediated nanoplatform, Ce6@ZIF-8/PDA/CuO 2 /HA (CZPCH), with photodynamic activity, self-supplied H 2 O 2 , Fenton-like reaction, GSH-depletion and photothermal activity was designed for efficient tumor treatment. In the acidic TME, CuO 2 in CZPCH deposits into Cu 2+ and H 2 O 2 , consuming GSH and triggering Fenton-like reactions to generate hydroxyl radical (•OH), enabling efficient chemodynamic therapy (CDT). Moreover, the presence of Ce6 and PDA enables CZPCH to exhibit excellent singlet oxygen ( 1 O 2 ) and temperature increase performance 660 nm and 808 nm laser irradiation, respectively, resulting in efficient photodynamic therapy (PDT) and photothermal therapy (PTT) efficacy. Interestingly, the temperature increase from PTT significantly enhances •OH and 1 O 2 generation, achieving high-efficiency ROS-based therapeutic efficacy. This synergistic CDT/PDT/PTT treatment demonstrates excellent anti-tumor efficacy and illuminates novel ROS-based therapeutic strategy design.
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OPTICS AND LASER TECHNOLOGY
·
2024
·
IF 4.6
Cheng Lu,Weiyu Fan,Xiaoyu Zhao,Kaixin Li,Lezheng Wang,Yutian He,Huanian Zhang,Nannan Xu,Guomei Wang,Wenfei Zhang,Caixun Bai,Shenggui Fu
In practical applications, high repetition frequency (HRF) lasers are widely used in the fields of material processing, laser communication and medical therapy. In this work, the passive harmonic mode-locked (HML) technique is used to realize a HRF fiber laser in GHz level, effectively overcoming the limitations of traditional fiber laser structures. In order to maximize the advantages of nanomaterials, we synthesized high-purity hollow MoS 2 -Co 3 S 4 heterojunction materials by hydrothermal method. Then, a “sandwich” structure saturable absorber (SA) was prepared by photodeposition, and its nonlinear optical properties were investigated. The results demonstrate that the modulation depth and saturation intensity of MoS 2 -Co 3 S 4 SA are 24 % and 4.53 MW/cm 2 , respectively. The fiber laser based on MoS 2 -Co 3 S 4 SA could realize the fundamental frequency mode-locked at 23.11 MHz with a pulse width of 0.99 ps. In addition, various high-order HML are realized with this laser system capable of stable operation for extended periods up to the highest repetition frequency of 1.109 GHz achieved thus far in this field. This research provides strong support to promote the development and commercialization of HRF fiber lasers.
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JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2024
·
IF 3.6
Qing Yang,Xiaosheng Jin,Yuansen Zhang,Xiaoqiu Wu,Haiying Lin,Tingting Ji,Rongzhou Li
The aim of this study is to investigate the impact of sh-LncRNA ASB16-AS1 on doxorubicin (DOX) resistance in colorectal cancer (CRC). First, an in vitro study was conducted to investigate the effects of LncRNA ASB16-AS1, miR-185-5p, and TEAD1 on drug resistance in CRC cells. Subsequently, utilizing nanotechnology, poly(beta amino esters) (PBAE)/zeolitic imidazolate framework-8 (ZIF-8)@sh-LncRNA ASB16-AS1 nanoparticles (PZSNP) were synthesized and characterized, evaluating their cellular toxicity and hemolytic activity. Finally, a mouse subcutaneous tumor model was established by subcutaneous injection of SW480/DOX cell suspension to investigate the impact of PZSNP on the tumor. Under DOX treatment, downregulation of LncRNA ASB16-AS1, overexpression of miR-185-5p, or downregulation of TEAD1 suppressed the viability and proliferation of drug-resistant CRC cells while promoting apoptosis. Conversely, overexpression of LncRNA ASB16-AS1, inhibition of miR-185-5p, or overexpression of TEAD1 enhanced the viability and proliferation of drug-resistant CRC cells while inhibiting apoptosis. The synthesized PZSNP exhibited a spherical shape with an average particle size of 123.6 nm, possessed positive charge, displayed good stability. It effectively encapsulated shRNA and displayed low cellular toxicity and hemolytic activity. Under DOX treatment, significant tumor necrosis was observed in the PZSNP group, and tumor growth was suppressed without causing weight loss. LncRNA ASB16-AS1, miR-185-5p, and TEAD1 are involved in regulating cell viability, proliferation, and apoptosis, contributing to drug resistance in CRC cells. sh-LncRNA ASB16-AS1 enhances the sensitivity of CRC cells to DOX during treatment, and in vivo delivery of PZSNP may serve as an effective strategy to overcome chemotherapy resistance in CRC.
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Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 21
·12712-12720
·
IF 10.7
Tianhao Yu,Peng Gao,Hong Du,Ling Dong
Metal–organic frameworks (MOFs) have recently been reported as promising catalysts for the oxygen evolution reaction (OER). Hence, we chose hydroxyl-rich 2,5-dihydroxyterephthalic acid as the ligand to prepare a novel MIL-100 and wrapped it on the NiCo-ZIF-67 surface to obtain an amorphous hollow material (NiCo-ZIF-67@Fe-MIL-100, denoted as NiCo-ZIF@MIL). The composite material presents a low overpotential (η ≈ 139 mV @ 10 mA cm−2), a small Tafel slope (119 mV dec−1) and great stability for the OER in 1 M KOH solution. Density Functional Theory (DFT) calculations show that the hydroxyl-rich structure, which accelerates OH− transfer and promotes the formation of the Co–O–Fe bridge, effectively reduces the reaction energy barrier (from 2.67 eV for NiCo-ZIF-67 to 2.08 eV for NiCo-ZIF@MIL). This work provides an important reference for the development of double-MOF materials.
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