Journal of Coatings Technology and Research
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2023
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IF 2.3
Lai Yuwen,He Jin,Li Yanchun,Zhou Shilin,Yan Wentao,Zhou Yong,Gao Congjie
Metal–organic frameworks (MOFs) are widely employed in designing nanocomposite membranes owing to their excellent performance and diversity. However, their inherent hydrophobicity limits their application in nanocomposite membranes. In order to improve the hydrophilicity of zeolitic imidazolate framework-8 (ZIF-8), tannic acid (TA) was utilized to etch-modify it, resulting in a TA-ZIF-8 nanostructure with a hydrophilic shell. TA-ZIF-8 was subsequently introduced into the aqueous phase and used to prepare a nanocomposite matrix reverse osmosis membrane through interfacial polymerization (IP). The prepared nanocomposite reverse osmosis membrane had a surface with good hydrophilicity and a pure water flux increased to 55.28 L m −2 h −1 (approximately 1.74 times). Additionally, the introduction of TA-ZIF-8 significantly enhanced the electronegativity of the membrane surface, and the nanoparticles were compatible with the polyamide layer, leading to a salt rejection rate of up to 99.5% for a NaCl solution with a concentration of 32000 ppm. These results indicate great potential for applying hydrophilically modified ZIF-8 to reverse osmosis membranes.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yong Chen,Yong Liu,Xiaobo Gong,Jianlong Wang
Photocatalytic hydrogen peroxide (H 2 O 2 ) production and its application in advanced oxidation processes (AOPs) are regarded as low-cost and environmentally friendly wastewater treatment processes. Herein, by modifying a small amount of sulphide on the zeolitic imidazolate framework-8 (ZIF-8), a ZnS@ZIF-8 composite and used for photocatalytic H 2 O 2 production to degrade chlorinated organic pollutants under simulated sunlight (SSL). ZnS@ZIF-8 composite could enhance the separation of photo-induced charge carriers, promote electron transfer from zinc sulphide (ZnS) to ZIF-8, which exhibited good selectivity for the two-electron oxygen reduction reaction (2e - -ORR) and two-electron water oxidation (2e - -WOR) pathways. Based on oxygen (O 2 ) activation, the developed ZnS@ZIF-8/O 2 /SSL system could achieve 6.43 mmol/L H 2 O 2 production within 150 min, which was approximately 8.66 and 10.36 times higher than that of the ZnS/O 2 /SSL and ZIF-8/O 2 /SSL systems, respectively. In the ZnS@ZIF-8/O 2 /SSL system, the ORR, WOR and H 2 O 2 photolysis led to the generation of hydroxyl radical (•OH), while the photochemical behavior of ZnS in ZnS@ZIF-8 composite resulted in the generation of active hydrogen (*H). Benefitting from the high concentration of H 2 O 2 and the coexistence of redox species in the ZnS@ZIF-8/O 2 /SSL system, various chlorinated organic pollutants could be dechlorinated and mineralized. In addition, a possible mechanism for photocatalytic H 2 O 2 production was also proposed. Importantly, the proposed process did not involve an additional sacrificial agent or Fenton-like catalysts. This work provides insights into the potential application of ZnS@ZIF-8 composite for H 2 O 2 production and wastewater treatment.
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PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Jianmin He,Weixiang Xu,Hao Liu,Qiuyan Luo,Juguo Dai,Yiting Xu,Birong Zeng,Guorong Chen,Conghui Yuan,Lizong Dai
Designing new additives has been an effective way to improve the anti-corrosion performance of organic coatings . Inorganic materials, layer double hydroxide (LDH), with lamella structure which can improve the barrier property and the porous zeolite imidazole frameworks (ZIF) with corrosion inhibitor can impart the active protective ability to organic coatings. Here we synthesized a new kind of ZIF/LDH composite, named AZLT loaded with 2-amino benzothiazole by in-situ growth method and further grew TEOS film on the surface. XRD , FT-IR, BET, XPS, SEM and TEM verified the successful synthesis of AZLT. UV–Vis test was applied to study the pH-responsive release behaviour. The better mechanical performance and hydrophobicity of AZLT/EP coated on Q215 steel enrich itself with better resistance ability to corrosion media. Moreover, the AZLT/EP composite coatings show the best anti-corrosion performance in the EIS study in 28 days of immersion and the salt spray test in 14 days in comparison with pure EP.
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International Journal of Nanomedicine
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2023
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IF 8
Wenbo Wu,Xiaoli Yu,Jiaxiang Sun,Yuanyuan Han,Yuanye Ma,Guoqing Zhang,Qingming Ma,Qiang Li,Hongfei Xiang
Background As a broad-spectrum antitumorigenic agent, doxorubicin (DOX) is commonly used as a chemotherapeutic drug for treating osteosarcoma (OS). Still, it is associated with significant cell toxicity and ineffective drug delivery, whereas the zeolite imidazolate framework is extensively applied in the biomedical field as a carrier owing to its favorable biocompatibility, high porosity, and pH-responsiveness. Therefore, we need to develop a drug delivery platform that can effectively increase the antitumorigenic effect of the loaded drug and concurrently minimize drug toxicity.Methods In this study, a Fe3O4@ZIF-8 nanocomposite carrier was prepared with ZIF-8 as the shell and encapsulated with Fe3O4 by loading DOX to form DOX- Fe3O4@ZIF-8 (DFZ) drug-loaded magnetic nanoparticles. Then, we characterized and analyzed the morphology, particle size, and characteristics of Fe3O4@ZIF-8 and DFZ by TEM, SEM, and Malvern. Moreover, we examined the inhibitory effects of DFZ in vitro and in vivo. Meanwhile, we established a tumor-bearing mouse model, evaluating its tumor-targeting by external magnetic field guidance.Results DFZ nanoparticles possessed have a size of ~110 nm, with an encapsulation rate of 21% and pH responsiveness. DFZ exerted a superior cytostatic effect and apoptosis rate on K7M2 cells in vitro compared to DOX(p<0.01). In animal experiments, DFZ offers up to 67% tumor inhibition and has shown a superior ability to induce apoptosis than DOX alone in TUNEL results(p<0.01). Tumor-targeting experiments have validated that DFZ can be effectively accumulated in the tumor tissue and enhance anticancer performance.Conclusion In summary, the DFZ nano-delivery system exhibited a more substantial anti-tumorigenic effect as well as superior active tumor targeting of DOX- Fe3O4@ZIF-8 compared to that of DOX alone in terms of biocompatibility, drug loading capacity, pH-responsiveness, tumor-targeting, and anti-tumorigenic effect, indicating its chemotherapeutic application potential.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2023
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IF 5.8
Kaili Wang,Hao Chen,Si Qin,Shuhui Chen,Qian Zhang,Jiali Chen,Donghua Di,Guangyue Su,Yue Yuan
Hepatic fibrosis, as a destructive liver disease, occurs due to activated hepatic stellate cells (HSCs) producing excessive extracellular matrix deposition. If left untreated, it could further deteriorate into cirrhosis and hepatoma with high morbidity and mortality. Currently, to break the dilemma of poor targeting efficiency on HSCs and limited effect of monotherapy, it is urgent to explore a precise and efficient treatment against liver fibrosis. In the present work, a novel multifunctional nanoplatform based on vitamin A (VA) modified zeolitic imidazolate framework-8 (ZIF-8) nanoparticles was designed for co-delivery of chemical drug (Pirfenidone) and genetic drug (TGF-β 1 siRNA) to achieve HSCs targeting mediated synergistic chemo-gene therapy against liver fibrosis. With the large specific surface area and acid-responsive degradation characteristics, ZIF-8 nanoparticles have great advantages to achieve high loading efficiency of Pirfenidone and enable acid-reactive drug release. After complexing siRNA, the prepared chemo-gene drug co-delivered nanocomplex (GP@ZIF-VL) proved excellent serum stability and effectively protected siRNA from degradation. Importantly, in vitro cell uptake and in vivo biodistribution demonstrated that VA functionalization markedly enhanced the delivery efficiency of GP@ZIF-VL nanocomplex into HSCs. As expected, GP@ZIF-VL significantly reduced extracellular matrix deposition and ameliorated hepatic fibrosis, as evidenced by decreased levels of liver enzymes in serum and a reduction in the hydroxyproline content in liver tissue. Therefore, GP@ZIF-VL nanocomplex displayed a bright future on the treatment of liver fibrosis with HSCs-targeting mediated chemo-gene synergetic therapy.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Zikang Qin,Siying Xiang,Ziheng Jing,Min Deng,Wenju Jiang,Lu Yao,Lin Yang,Liyuan Deng,Zhongde Dai
Thin-film nanocomposite (TFN) membranes based on metal–organic frameworks (MOFs) have received increasing attention in the field of water treatment. However, TFN membranes with both high permeance and rejection rates are highly desired. In this study, ultra-thin ZIF-67 was synthesized and TFN membranes were fabricated by combining the obtained 2D ZIF-67 with cellulose nanofibers (CNF) and carbon nanotubes (CNTs). The nanofibers not only fill the gaps between the ZIF-67 nanosheets but also form an intercalation layer between the ZIF-67 nanosheets and function as a water transport pathway, leading to a significant enhancement of water permeance. By introducing CNF into the ZIF-67-embedded matrix, the dye rejection rates increase to 96.8 % and 93.3 %, respectively, with water permeance of about 90.0 L⋅m −2 ⋅h −1 ⋅bar −1 . Further introducing CNT into the CNF/ZIF-67 membrane further improved the water permeance to 207.8 L⋅m −2 ⋅h −1 ⋅bar −1 , while a dye rejection rate of 95.1 % was documented. The results indicate that the introduction of nanofibers into 2D MOF matrix to form TFN membranes has great potential for wastewater treatment.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Cheng Chen,Guangzhi Zhou,Jianhua Sun,Dapeng Xu,Meixin Zhang,Zhangfa Tong,Dankui Liao
The activity of alkaline phosphatase (ALP) is related to various pathological processes. Therefore, developing an ALP activity detection technology with high sensitivity and accuracy is of great significance for clinical diagnosis and cancer screening. To solve uncontrollable carbon nanotubes (CNTs) structure and lack of solubility, FeCo hollow nanocages (HNCs)@CNTs catalysts were prepared by facile pyrolysis of ZIF-67 precursor mixed with Fe-Co catalyst, displaying an oxidase-like activity. From the characterization, formation of CNTs was observed on the surface of FeCo HNCs@CNTs with the mole ratio of Fe 3+ to Co 2+ of 3:1. Density functional theory calculations demonstrated that the performed catalytic activity of FeCo HNCs@CNTs derived from active orbital of Co-3d band, which enabled the activation and decomposition of O 2 with a feasible thermodynamic process. · O 2 − and 1 O 2 were the main reactive oxygen species as electron acceptors. ALP catalyzed the hydrolysis of ascorbic acid 2-phosphate (AAP) to convert it into ascorbic acid (AA), which could effectively reduce the FeCo HNCs@CNTs-mediated chromogenic reaction of TMB oxidation. The performance of the FeCo HNCs@CNTs-linked biosensing assay showed a broad detection range from 0.1 U/L to 150 U/L and a relatively low limit of detection of 0.083 U/L. The ALP activity of the mouse serum sample obtained by the proposed biosensing assay was highly consistent with that via the clinical method, indicating a promising technology in biomolecule detection.
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SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Xinyu Fang,Jiali Ma,Chenjie Gu,Wei Xiong,Tao Jiang
Surface-enhanced Raman scattering (SERS) is a prospective and ultrasensitive analytical technique because of its prominent molecular fingerprint diagnosis ability. Nonetheless, the tested molecules are typically required to be steadily attached onto a SERS-active region, which makes it tough to monitor feebly adsorbed molecules . In this study, a polydimethylsiloxane (PDMS)-based flexible SERS substrate combined with silver nanocubes (Ag NCs) and ZIF-67 was developed with a facile layer-by-layer strategy. A superhigh enhancement factor (EF) of 9.1 × 10 8 M was obtained by electromagnetic enhancement from the promising Ag NCs in conjunction with the molecular anchoring surface and chemical enhancement ability of ZIF-67. Furthermore, the practical SERS-based detection of quercetin with an ultra-low limit of detection (LOD) of 2.3 × 10 −5 mg/mL was subsequently achieved utilizing this multifunctional substrate, indicating its intriguing outlook in the direct monitoring of food nutrients. Notably, the intrinsic Raman signal at 2905 cm −1 of PDMS framework was adequately utilized as an internal standard to promote the reliability of such detection. It is anticipated that this smart platform with both prominent SERS performance and quantitative test ability may find an extensive application in the domains of food and biochemical assay.
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ChemNanoMat
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2023
·Vol. 10
·期 3
·e202300499
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IF 3.8
Xiaozhu Zhao,Zongxin Li,Fengchuan Guo,Naipu He,Wen Li,Xuerui Zhao
Graphical The morphology of micelles in surfactant-free emulsion was regulated by adjusting the oil-water ratio and concentration of amphiphilic copolymer. Subsequently, polymer micelles served as templates to direct the assembly of ZIF-8 crystals in the surfactant-free emulsion to fabricate polymer/ZIF-8 composite materials (ZIF-8@CSP) with various structures. An amphiphilic chitosan-g-poly N-(3-dimethylaminopropyl) methacrylamide (CS-g-PDMAPMA, CSP) was proposed and synthesized by reversible addition-fragmentation chain transfer polymerization (RAFT), and further employed as emulsifier to construct a surfactant-free emulsion. The morphology of micelles in surfactant-free emulsion was regulated by adjusting the oil-water ratio and concentration of amphiphilic copolymer. Subsequently, polymer micelles served as templates to direct the assembly of ZIF-8 crystals in the surfactant-free emulsion to fabricate polymer/ZIF-8 composite materials (ZIF-8@CSP) with various structures. Specifically, ZIF-8@CSP with various architectures such as spheres, rods, cubes, leaf-shaped flakes, cross-flowers and wrinkled cubes were obtained by varying the concentration of CSP, the addition sequence of ZIF-8 precursors and the ratio of oil-water.
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Reaction Chemistry & Engineering
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2023
·Vol. 8
·期 12
·3124-3132
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IF 3.9
Chenhua Shu,Min Zhao,Hua Cheng,Yajie Deng,Pierre Stiernet,Niklas Hedin,Jiayin Yuan
A type-III porous liquid based on zeolitic imidazolate framework-8 (ZIF-8) and an ionic liquid trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide ([THTDP][BTI]) was synthesized and used for the desulfurization of model diesel. The desulfurization effect by ZIF-8/[THTDP][BTI] combined both the adsorptive desulfurization by ZIF-8 and the extraction desulfurization by [THTDP][BTI]. The removal of the three chosen aromatic organic sulfides by the ZIF-8/[THTDP][BTI] porous liquid followed the order of dibenzothiophene (73.1%) > benzothiophene (70.0%) > thiophene (61.5%). It was further found that deep desulfurization could be realized by ZIF-8/[THTDP][BTI] through triple desulfurization cycles and ZIF-8/[THTDP][BTI] can be regenerated readily. The desulfurization mechanism was explored further in detail by conformation search and density functional theory calculations. Calculations supported that the large molecular volume of [THTDP][BTI] excluded itself from the cavities of ZIF-8, making the pores of ZIF-8 in the porous liquid unoccupied and accessible by other guest species, here the studied organic sulfides. These calculations indicate that the van der Waals interactions were the main interactions between ZIF-8/[THTDP][BTI] and specifically benzothiophene. This work supports that the porous liquid ZIF-8/[THTDP][BTI] could potentially be used for desulfurization of diesel in industry.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
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IF 5.2
Shujuan Zhang,Yanpeng Mao,Lai Wei,Zhanlong Song,Xiqiang Zhao,Wenlong Wang
The use of thermal conversion to convert Chinese patent medicines (CPM) residues into porous carbon-based materials and carbon dots (CDs) has effectively resolved the challenges associated with resource waste and environmental pollution while enhancing the added value of CPM residues. In this study, biochar and N-doped CDs with high quantum yield (QY) were simultaneously prepared from fermentation residues by employing a hydrothermal carbonization method without any chemical reagents . The obtained biochar had remarkable adsorption capacity, with an iodine adsorption value of 693.22 mg g –1 . The QY of N-doped CDs could reach to 36.17 % by the mean of self-doping due to the high nitrogen content of the fermentation residues. Considering the structural integrity and permeable porous structure of the two-dimensional leaf-like zeolitic imidazole framework (ZIF-L), N-doped CDs were encapsulated into ZIF-L to form novel fluorescent composites (N-doped CDs@ZIF-L). Moreover, N-doped CDs@ZIF-L as a novel fluorescent probe could be efficiently quenched in the presence of tetracycline (TC), doxycycline (DOC), and chlortetracycline (CTC) by static quenching and the inner filter effect . Notably, the fluorescent probe exhibited a good linear relationship with the TC, DOC, and CTC at 0–50, 0–50, and 0–45 μM, respectively, with limits of detection of 0.025, 0.033, and 0.027 μM, respectively. This probe could be employed to detect TC antibiotics in honey and milk, suggesting that it had the great potential for applications in environmental monitoring and food safety.
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APPLIED SURFACE SCIENCE
·
2023
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IF 6.7
Jialu Pan,Lin Che,Tong Wei,Yanqing Cong,Shi-Wen Lv
It is of great significance to rationally regulate the activation mechanism of peroxymonosulfate for wastewater treatment. Herein, for the first time, a newly-constructed NiCo 2 O 4 @ZIF-67 core–shell nanocage was employed as a mediator for effective removal of tetracycline (TC). As-prepared NiCo 2 O 4 @ZIF-67 displayed reduced charge transfer resistance and enhanced electron transfer rate. Importantly, more than 99.58% of TC can be degraded within 30 min by developed NiCo 2 O 4 @ZIF-67/PMS system, and the removal efficiency of TOC was as high as 72.81%. Moreover, antimicrobial tests revealed the low toxicity or non-toxic of degradation products. More interestingly, after coating ZIF-67 film on the surface of NiCo 2 O 4 , the electron transfer process among PMS, contaminant and catalyst was enhanced. The radical and nonradical pathways worked in coordination each other and achieved the rapid removal of various organic pollutants. The ZIF-67-derived NiCo 2 O 4 core dominated the generation of reactive oxygen species, while the coated ZIF-67 shell induced the electron transfer from TC to PMS. Besides, the introduction of ZIF-67 not only improved the anti-interference for inorganic anions, but also boosted the water stability, thereby resulting in that NiCo 2 O 4 @ZIF-67 still remained great catalytic performance after repeated use for several times. In short, current work shared a promising approach for wastewater treatment.
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