SEPARATION AND PURIFICATION TECHNOLOGY
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2024
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IF 8.1
Jing Wang,Wenlei Wang,Yao Deng,Ting Yang,Zhen Zhang,Hui Wang,Yiqiang Wu
Chiral nanomaterials typically exhibit special optical activities, such as optical rotation and chiral photomechanics, and have enormous potential for applications in molecular chiral photocatalysis and other fields. In this work, cellulose nanocrystals (CNCs) were obtained from renewable and affordable bamboo resources through the steps of delignification, hemicellulose removal and acid digestion. Meanwhile, ZIF-8 materials with truncated rhombic dodecahedral structure were obtained by liquid-phase synthesis from Zn 2+ coordinated with 2-methylimidazole (2-MiM). And then, the topologically chiral CNCs@ZIF-8 3D network was successfully constructed by using CNCs as a bridge to graft with ZIF-8 through the formation of Zn–N–S and Zn–O–S bonds. The photoreduction yield of CO 2 to CO by CNCs@ZIF-8 (α = +21.290) with topological chirality was 301.16 μmol −1 ·g −1 , which was 9.43 times that of ZIF-8 (α = 0.000). Density functional theory (DFT) calculations confirm that Zn–O–S with a larger bond angle (118.0°) was conducive to charge accumulation. Photoelectric test results show that CNCs can improve the electron transport ability and reduce the rate of photogenerated electron-hole complexation in ZIF-8. This work elucidated the mechanism of chiral auxiliaries in photocatalytic reduction of CO 2 and provided a new strategy for photocatalytic reduction of CO 2 .
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JOURNAL OF CATALYSIS
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2024
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IF 6.5
Xin-Yu Chang,Hong-Wei Li,Yuqing Wu
The composites of H 2 N-ZIF-8 supported gold nanoclusters (AuNCs@H 2 N-ZIF-8) were prepared by UV-induced photochemical reduction method in the methanol–water solution. The photochemical reaction was attributed to the generation of free radical as. CH 2 ·–OH, which reduced Au(III) to Au(0) and produced monodisperse AuNCs (<2.5 nm) in the mesoporous of H 2 N-ZIF-8. The generated AuNCs@H 2 N-ZIF-8 show oxidase-like properties to catalyze the oxidation of TMB, ABTS and OPD under mild conditions. Besides, the mechanism study by EPR shows that the composites can promote oxygen to generate singlet oxygen ( 1 O 2 ) and superoxide radicals ( ·O 2 - ), endowing it excellent catalytic activity of oxidation. Further studies revealed that the large number of exposed small AuNCs in the mesoporous pores of H 2 N-ZIF-8 and the highly active 211 crystalline facets formed at the edges contribute to the ROS generation intrinsically. Therefore, the present study demonstrates the significance of photochemical reduction method to prepare highly efficient oxidase-like materials, opening up a new avenue to construct noble metal materials as ultra-small nanozyme.
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TALANTA
·
2024
·
IF 5.6
Yueshou Zhang,Lichun Yang,Yulin Xu,Haiting Ren,Shi Yin,Yan Sun,Yongjun Hu
Rapid and sensitive detection of phosphate is of great significance for ensuring water safety and preventing eutrophication. In this study, we prepared Au@PATP@Ag NRs core-shell structures using 4-aminothiophenol (PATP) as an internal standard signal molecule to enhance the stability of the SERS signal. Based on the phosphate-induced decomposition of ZIF-8 and the protective effect of ZIF-8 on the internal Au@PATP@Ag NRs, a phosphate SERS sensor (Au@PATP@Ag@ZIF-8) with high sensitivity, selectivity and stability was designed. This method exhibited a good linear range of 0.1–125 μM and a detection limit of 30 nM. Furthermore, the developed sensor (Au@PATP@Ag@ZIF-8) was effectively applied to assess PO 4 3− in tap water samples, achieving recoveries between 97.44% and 104.54%. With its simple, fast and sensitive features, this method of phosphate detection in water provides a direction for the research and practical application of phosphate detection.
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ANALYTICA CHIMICA ACTA
·
2024
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IF 5.7
Jiahui Yang,Yao Lin,Xi Wang,Yuanyuan Li,Yurong Deng,Chengbin Zheng
Background Arsenic contamination of drinking water has become a public health challenge over the world, particularly in Bangladesh, India, and China. Compared to the most used field test kits of waterborne arsenic, miniature microplasma atomic spectrometry retains advantages of accuracy, elemental specificity, and less matrix interference. Despite increased interest in arsenic detection by using miniature microplasma spectrometry, the improvements of its analytical performance, manufacturing cost and consistency still remain significant challenges. Results Herein, a miniature, battery-operated, and integrated hydride generation point discharge optical emission spectrometer (HG-μPD-OES, 116 mm length × 92 mm width × 104 mm height) was printed with a simple 3D printer and used for the highly sensitive and element-specific determination of arsenic by coupling to a dispersive solid-phase extraction (d-SPE) using zeolitic imidazolate framework-8 as adsorbent. The d-SPE simplifies sample treatment, significantly alleviates the interference arising from transition metal ions and improves sensitivity. A LOD of 0.07 μg L −1 for arsenic was obtained with relative standard deviations (RSDs, n = 11) better than 3.8 %. Significance The 3D printing technique significantly improves the manufacturing cost and fabricating consistency of HG-μPD-OES. LOD were remarkably improved 27-fold compared to those obtained by conventional HG-μPD-OES, providing a promising method for the reliable, sensitive, and convenient field analysis of waterborne arsenic even its concentration as low as 0.2 μg L −1 . The practicability and accuracy of the proposed method have been successfully verified via the field analysis of waterborne arsenic in a Certified Reference Material (GBW(E)080390) and a series of river and lake water samples.
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Molecular Catalysis
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2024
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IF 3.9
Pushuang Xing,Cong Li,Yixin Chen,Rong-Lan Zhang
PMoV 2 was encapsulated in four MOFs (MIL-101, HKUST-1, UiO-67, ZIF-8) with different cavity sizes and window sizes using a hydrothermal synthesis method. Then, a layer of mesoporous silica was coated on the surface of the MOFs to obtain four designed three-layer encapsulated catalysts 30%PMoV 2 @MOF@mSiO 2 . The physicochemical properties of the catalysts were characterized through various characterization methods, and the influence of different MOF window sizes of the four catalysts on the removal rate of four thiophene sulfides was investigated. The optimal reaction conditions were also explored for the optimal catalyst. The results indicate that under simulated fuel of 2400 ppm, 30%PMoV 2 @UiO-67@mSiO 2 owns the highest catalytic activity. Under optimal conditions, the total removal rate of four thiophene compounds was 91.52 %, and after ten cycles, the efficiency could still reach 86.24 %. This is attributed to the sufficient cavity size of UiO-67, which provides assurance for the loading of PMoV 2 and the large window size, making it possible for the smooth reaction between sulfides and PMoV 2 .
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JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Shiwei Tian,Yaqi Zhang,Qiankun Sha,Yixuan Wang,Xingxiang Zhang,Xuhuan Yan,Na Han
Polyphenylene sulfide (PPS) membrane materials have attracted significant attention for separating oily wastewater due to their remarkable separation precision and permeation capability. Nevertheless, the inherent hydrophobic characteristics result in a single wetting property, which restricts their broad applicability in treating diverse types of oily wastewater. In this study, the PPS/TA-PEI/CaAlg/ZIF-8 composite membranes exhibit outstanding under-liquid dual superlyophobicity, which were formed via constructing a composite coating containing polyphenol-polycation and calcium alginate (CaAlg) hydrogel, and assembling ZIF-8 nanocrystals with suitable surface chemistry. Through the solvent pre-wetting approach, the surface wettability of the PPS composite membranes can be flexibly transitioned between under-water superoleophobicity and under-oil superhydrophobicity, thus realizing on-demand separation of oily wastewater. It is noteworthy that the treatment efficiency of the PPS/TA-PEI/CaAlg/ZIF-8 composite membranes for the various oil-water mixtures (surfactant-free) and emulsions (stabilized by surfactants) attained greater than 98.1%. Meanwhile, the rapid transport capability of diverse types of oil-water emulsions can also be exhibited, with a permeance of 1652.4 L m -2 h -1 bar -1 for water-in-oil (W/O) emulsions and 2087.5 L m -2 h -1 bar -1 for oil-in-water (O/W) emulsions. In addition, the PPS composite membranes demonstrated outstanding anti-fouling capacity, recyclability, and switchable separation capacity. This work extended the utilization of the PPS membrane material in the controllable treatment of oily wastewater.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2024
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IF 4.8
Yiwen Li,Shikuan Xu,Yangyang Zhang,Rui Du,Rong Li,Yanjun Xing
MimDES-ZIF-8 with rich active sites as positive charges and metal coordination sites were prepared based on imidazole based deep eutectic solvent (MimDES) using interface permeation method. 2-Methylimidazole (2-Mim) simultaneously acted as a hydrogen bond acceptor (HBA) in MimDES (hydrogen donner was 1,6-hexanediol) and an organic ligand in MimDES-ZIF-8, affecting the coordination of ZIF-8 during permeation. Four different zinc salt solutions (ZnCl 2 , Zn(NO 3 ) 2 ·6H 2 O, Zn(OAc) 2 ·2H 2 O, ZnSO 4 ·7H 2 O) were permeated into MimDES to obtain MimDES-ZIF-8 with different morphologies. All MimDES-ZIF-8 had higher Zn/N ration (>0.25), specific surface area and surface positive charges. The dye adsorption results indicated that MimDES-ZIF-8 showed high adsorption efficiencies for acid fuchsin (all exceeded 97.75 % under pH 7.5) and a fast adsorption rate (exceeding 93 % in 5 min and reaching equilibrium in 60 min). Among MimDES-ZIF-8, the adsorption capacity of ZIF-8-C was 4845.3 mg/g. After five cycles of adsorption, the AF removal efficiency of ZIF-8-C remained over 93.23 %. Moreover, ZIF-8-C also had good adsorption capacity for anionic dyes CR, cationic dyes MB and BB. The adsorption process aligned well with both the Langmuir model and the pseudo-second-order kinetic model. Based on FTIR, XPS, and electrostatic potential calculation, the adsorption mechanism was elucidated.
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NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 27
·12387-12398
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IF 2.7
Yafeng Jin,Fangming Han,Tao Wang,Haofu Shi,Xiaobo Li,Li Yang,Na Chen,Kaifeng Yang,Xinyue Song,Guangri Xu
Developing a facile and effective assay method is crucial due to the potential harm of metronidazole (MNZ) antibiotics to both human health and the environment. Herein, snowflake-shaped poly(3-thiophenemalonic acid, 3-TPA) combined with a carbonized core–shell-type ZIF-8@ZIF-67 (C-ZIF-8@ZIF-67) hollow polyhedra modified glassy carbon electrode (GCE), denoted as C-ZIF-8@ZIF-67/P3TPA/GCE, was fabricated by electropolymerization followed by the electrodeposition strategy. The resulting sensor demonstrates a significant electrocatalysis effect for the reduction reaction of MNZ, exhibiting a broad linear range (0.1–20, 20–800 μM) with a low limit of detection (LOD, 3S/N) of 0.024 μM. Furthermore, it has been successfully applied to determine MNZ in tablets and lake water. A synergistic effect between P3TPA and C-ZIF-8@ZIF-67 is elucidated through density functional theory (DFT) calculations. Consequently, this research introduces a sensitive and effective method for monitoring MNZ in real samples.
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ACS Sensors
·
2025
·
IF 9.1
Zhenguo Zhang,Xue Li,Shuo Zhang,Mingshuang Zheng,Fangping Yuan,Shushen Li,Bei Yuan,Lisheng Liu,Xin Du
Although immunotherapy has become an established approach in cancer treatment, not all patients exhibit a positive response. Current research on PD-1 primarily focuses on immune cells using conventional methods, yet PD-1 expression on tumor cells is also widespread and plays an increasingly critical role in assessing immunotherapy efficacy. To address this, we developed an electrochemical biosensor capable of specifically detecting PD-1 at both the protein and tumor cellular levels in situ, eliminating the need for sample fixation and thereby streamlining the analytical process. Additionally, our probe enables simultaneous localization analysis of PD-1 through fluorescence signaling. The biosensor integrates a bifunctional probe composed of a nanometal–organic framework (MOF, ZIF-8) conjugated with quantum dots (QDs) and an electrode modified with a carbon nanotube (CNT)–gold nanoparticle (AuNP) nanocomposite. The morphology and performance of the nanocomposite were thoroughly characterized, and the resulting PD-1 biosensor demonstrates high specificity, reproducibility, and sensitivity. To facilitate clinical translation, we successfully applied the biosensor to detect differential PD-1 expression across various tumor cell lines and cancer tissues. This study establishes that our dual-mode electrochemical and fluorescent sensing platform provides a powerful tool for in situ PD-1 detection on tumor cells, offering valuable insights for evaluating tumor immunotherapy responses.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yan Li,Jing-Wen Liu,Xiao-Xue Lian,Shu-Mei Yang
Triethylamine is an organic amine compound with strong irritancy and toxicity that threatens ecological balance and human health, making accurate detection crucial. However, achieving high sensitivity and selective detection of TEA in ppb level is challenging. Herein, we have successfully prepared an Au-ZnO/ZIF-8 via an interface oxidation strategy followed by Au nanoparticles loading. The synthesis process involves three key steps: firstly, ZnO nanofibers are prepared by electrospinning, followed by in-situ coordination growth to form a ZIF-8 layer on the ZnO surface; subsequently, Au nanoparticles are decorated onto the ZnO/ZIF-8 surface through an impregnation-reduction method; finally, the composites are calcined in a tube furnace to generate oxidation layers while retaining the intrinsic properties of ZIF-8. Sensing tests toward 100 ppm TEA reveal that the Au-ZnO/ZIF-8 sensor exhibits a response of 1012.5 with a low detection limit of 2.78 ppb at 235 °C. This performance is 13.9-fold higher than that of ZnO/ZIF-8 (72.9 at 303 °C) and 30.5-fold higher than that of pristine ZnO (33.1 at 328 °C). Furthermore, the sensor demonstrates high selectivity for TEA, short response times (7 s), as well as excellent repeatability and stability. It indicates that the Au-ZnO/ZIF-8 sensor holds great potential for practical TEA detection, thereby providing a feasible strategy to improve the gas detection capabilities of MOF-based sensors.
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PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Hao Yang,Yi Liu,Hao Chen,Hua Li
Epoxy resin coatings are widely used for corrosion protection due to their cost efficiency, strong chemical durability and favorable mechanical strength. Antifouling agents have also been commonly applied to epoxy coatings for further antifouling function. However, due to the lack of reliable control of continuous release of the antifouling agents, the antifouling effect and service life keeps elusive. This study used a zinc-based metal organic framework ZIF-8 as a nanocarrier to prepare a novel antifouling agent NH 2 -ZIF-8@BITEP. The antifouling agent has uniform particle size and can effectively kill E. coli and S. aureus . After blending with epoxy resin, the resulting ZB coating effectively achieves contact sterilization, especially the ZB coating containing 20wt%NH 2 -ZIF-8@BITEP shows pronounced capability of inhibiting the formation of bacterial biofilm and the adhesion of algae even after 14 days incubation. In addition, the coating shows significantly enhanced corrosion resistance due to the hindering effect of the nanoparticles in the coating. After 7 days of salt spray testing, the ZB coating exhibits the least corrosion occurrence and no decrease in |Z| during EIS testing. The results would give insight into further understanding and potential antifouling and anti-corrosion applications of the newly synthesized antifoulant.
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ACS Applied Materials & Interfaces
·
2019
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IF 8.456
Ya-Ting Qin,Hui Peng,Xi-Wen He,Wen-You Li,Yu-Kui Zhang
A multifunctional diagnosis and treatment integration platform is crucial in cancer treatments. Here, we show that by integrating Gd-doped silicon nanoparticles (Si–Gd NPs), chlorine e6 (Ce6), doxorubicin (DOX), zeolitic imidazolate framework-8 (ZIF-8), poly(2-(diethylamino)ethyl methacrylate) polymers (HOOC-PDMAEMA-SH), and folic acid–poly(ethylene glycol)–maleimide (MaL–PEG–FA) into one single nanoplatform by a self-assembly method, novel multifunctional MOFs (named FZIF-8/DOX–PD–FA) are synthesized with great biocompatibility and tumor targeting as well as pH responsiveness and no drug leakage for drug delivery. In the design, Si–Gd NPs and Ce6 embedded in the nanocomposites are used for magnetic resonance and fluorescence dual-modal imaging, respectively. DOX loaded by the FZIF-8/DOX–PD–FA porous structure is used for chemotherapy, while Ce6 is excited by near-infrared radiation (NIR) for photodynamic therapy. In addition, the pH-responsive ability of HOOC-PDMAEMA-SH to effectively prevent drug leakage is demonstrated by drug release studies in vitro. From the results of confocal microscopy imaging in vitro and fluorescence/magnetic resonance imaging in vivo, FZIF-8/DOX–PD–FA showed a targeting effect on MCF-7 cancer cells. More importantly, the results of treatment experiments on tumor-bearing mice showed that the tumor volume of the FZIF-8/DOX–PD–FA + NIR group is decreased the most compared to the original volume. Owing to the unique dual-modal imaging capability and excellent chemo-/photodynamic combinational cancer therapy effect, the present hybrid nanocarrier provides a new research platform for a new generation of theranostic nanoparticles.
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