CHEMOSPHERE
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2022
·
IF 8.943
Mu Li,Jingwen Luo,Jianjiang Lu,Wentao Shang,Jiale Mu,Feiyun Sun,Zijun Dong,Xiaoyan Li
A novel Polyacrylonitrile (PAN) composite membrane involving ZIF-8 nanoparticles , named as ZIF-8/PAN membrane, was obtained via electrospinning to remove the Congo red (CR), Pb(II) and Cu(II) ions in industrial wastewaters , during which the adsorption mechanisms were examined in this study. The adsorption efficiency of the electrospun ZIF-8/PAN membrane was as high as 89%, 92% and 76% for CR, Pb(II) and Cu(II), respectively. Comparative analysis showed that ZIF-8 nanoparticles embedded in the ZIF-8/PAN membrane accounted for these enhanced adsorption capabilities. The adsorption behaviors of the ZIF-8 nanoparticles were investigated through experiments and theoretical analysis, and the results unraveled that the adsorption for CR by the ZIF-8 was mainly including electrostatic interaction, hydrogen bonding and π − π interaction, while those for Pb(II) and Cu(II) were mainly caused by ion-exchange and chemical adsorption. Parametric studies were conducted to optimize the conditions for removing CR, Pb(II), and Cu(II) by ZIF-8 nanoparticles, during which all of pollutants showed different reactions to the solution pH. This work not only develops a novel ZIF-8/PAN composite membrane for effective removals of pollutants, but also reveals the underlying mechanisms of pollutants adsorption in terms of molecular interactions, providing important understandings on fibrous materials design for efficient heavy metals and dyes removals in industrial wastewater treatment .
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高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2023
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IF 7.4
Wei Yang,Ximing Zheng,Mingli Cao
Spent adsorbents often contain harmful substances, which may have an impact on the ecological environment if these substances enter the environment. This study mainly introduces a safe treatment method for solid waste formed after heavy metal ions are adsorbed by an efficient adsorbent, ZIF-8@GO-COOH. This work mainly discusses the impact of solidifying the spent adsorbent in the cement system on the cement mechanical properties and hydration process. The experimental results showed that when the dosage of the spent adsorbent was 0.01%, 0.02%, 0.03%, and 0.04%, respectively, the compressive strength of 28 d was increased by 4.24%, 6.16%, 7.19%, and 8.87%, respectively, compared with the cement without spent adsorbent. Introducing spent ZIF-8@GO-COOH in the cement production process does not have a negative impact on the cement mechanical properties, and can refine the cement pore structure and dense microstructure, thereby improving the compressive strength. The Toxicity Characteristic Leaching Procedure (TCLP) results showed that solidifying the spent adsorbent with cement can effectively reduce the leaching of heavy metal ions in the spent adsorbent. This study solidifies the spent ZIF-8@GO-COOH nanoadsorbent material into the cement system as a sustainable alternative to landfilling. This treatment method has certain economic benefits and safety, and has some reference significance for promoting the development and improvement of spent adsorbents and improving their safe treatment and reuse.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
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IF 6.2
Pengfei Zhu,Xiaolong Wu,Xingyang Xiao,Ming Duan,Dan Luo,Jinru Lin
In this work, Bi 12 O 17 Cl 2 and ZIF-8 were synthesized via a facile in-situ precipitation method, while ZnO-CN was obtained through the pyrolysis of ZIF-8. Then, a novel Bi 12 O 17 Cl 2 /ZnO-CN composite catalyst with Z-scheme heterojunction was prepared by mechanical mixing-low temperature activation method. When the ZnO-CN is pyrolyzed at 550 ℃ and accounts for 10 wt% in the Bi 12 O 17 Cl 2 /ZnO-CN composite, the composite exhibited a significantly higher degradation rate for levofloxacin hydrochloride (LVX) (94.50%) compared to Bi 12 O 17 Cl 2 (67.30%) and ZnO-CN (36.80%), while also achieving a high removal rate of Cr(VI) under acidic conditions (92.00%). And the toxicity of LVX to wheat decreased significantly after photocatalytic degradation. Meanwhile, the Bi 12 O 17 Cl 2 /ZnO-CN has good universality, salt resistance and reuse stability. The experimental results of sample characterization show that the improved photocatalytic performance of Bi 12 O 17 Cl 2 /ZnO-CN composite can be attributed to the high-efficiency separation of electron-hole pairs (e - -h + ), enhanced light absorption in the visible region, increased specific surface area and active sites. Both the free radical capture experiment and electron paramagnetic resonance (EPR) test indicate that •O 2 - and h + are the primary active species in the process of degrading LVX by Bi 12 O 17 Cl 2 /ZnO-CN. Combined with mechanism exploration experiment and iquid chromatography-mass spectrometry (LC-MS) analysis, a possible direct Z-scheme heterojunction electron transfer mechanism and photocatalytic degradation pathways for LVX was proposed. This work enhances the photocatalytic performance of Bi 12 O 17 Cl 2 and provides an idea for antibiotic or Cr(VI) wastewater treatment.
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高影响因子
Nano Research
·
2023
·
IF 9.9
Chen Tanlin,Tian Yingrui,Guo Zihao,Chen Yao,Qi Qing,Meng Fanbin
In order to meet the requirements of the marine environment for microwave absorption (MA) materials, we put forward the strategy of constructing multi-functional composite materials, which integrate microwave absorption, anti-corrosion, and antibacterial properties. Herein, graphene oxide (GO) was used as a template to induce the growth of zeolitic imidazolate framework-8 (ZIF-8), simultaneously as a two-dimensional (2D) nanocontainers to load corrosion inhibitors to achieve pH-responsive and self-healing properties. Finally, quaternary ammonium salt (dimethyl octadecyl(3-trimethoxylsilyl propyl) ammonium chloride (DMAOP)) and sodium ascorbate (VCNa) were introduced to achieve synergistic antibacterial activity and the reduction of GO. The 2D strip-like structure of ZIF-8 was due to the confined growth induced by the electrostatic attraction between ZIF-8 and GO sheets. The as-obtained reduced GO (RGO)/ZIF-8/DMAOP 5 exhibited excellent microwave absorption (MA) properties, with a minimum reflection loss (RL) value of −47.08 dB at 12.73 GHz when the thickness was 2.8 mm. Moreover, the effective absorption bandwidth reached 6.84 GHz. After soaking in 3.5% NaCl solution for 35 days, the RGO/ZIF-8/DMAOP 5 −0.7% coating still achieved an impedance value of 4.585 × 10 7 Ω·cm 2 and a protective efficiency of 99.994%, providing superior anti-corrosion properties. In addition, fantastic antibacterial activity was obtained, with the antibacterial rates of RGO/ZIF-8/DMAOP 10 reaching 99.39% and 100% against Escherichia coli and Staphylococcus aureus . This work could open new avenues towards the development of a new generation of multifunctional MA materials.
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 19
·8701-8713
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IF 3.591
Yingxue Tu,Caifen Lei,Fei Deng,Yiang Chen,Ying Wang,Zhenkun Zhang
Metal–organic frameworks (MOFs) have the potential to boost the undervalued biomedical applications of metal ions. Such endeavor has been hindered by the challenge of how to avoid the (cyto)toxicity of the prematurely released metal ions to healthy cells or organisms and amorphous precipitates of ions formed with components in biological fluids before achieving targeting applications. The current work aimed to partially address such challenges by developing a prototypical metal ion reservoir. We prepared well-defined core–shell ZIF-8@PDA nanoparticles, with zeolitic imidazolate framework-8 (ZIF-8) as the reservoir of Zn2+ and polydopamine (PDA) with inherent metal ion chelating capabilities as the shell. The well-known self-etching problem of MOF templates upon polydopamine coating was mitigated by controlling the surface properties of cubic ZIF-8 nanoparticles. As regulated by the PDA shell that can partially trap the prematurely released metal ions, ZIF-8@PDA nanoparticles had a unique Zn2+ releasing behavior consisting of a limited releasing stage followed by pH-dependent burst releasing that could quickly increase the local Zn2+ concentration to harmful levels. Enhanced antibacterial efficiency of ZIF-8@PDA against Gram-positive Staphylococcus aureus was demonstrated. This could be attributed to the strong interaction of ZIF-8@PDA with bacteria as driven by inherent bioadhesion of PDA, which could promote direct interactions of released zinc ions with bacteria by avoiding potential precipitations.
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MICROPOROUS AND MESOPOROUS MATERIALS
·
2020
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IF 4.551
Niu Liu,Jun Cheng,Wen Hou,Xiao Yang,Junhu Zhou
In order to form strengthened active sites for superior CO 2 adsorption on core shell ZIF-8@ZIF-67 nanocomposites , graphene oxide (GO) with oxygen-containing functional groups was used as support to synthesize hybrid adsorbents with unsaturated Zn–N 2 –O active sites. The results of XPS O 1s and FTIR analysis revealed that the Me–O functional group content in the 0.5 wt% graphene oxide (GO)-supported core shell ZIF-8@ZIF-67 nanocomposite (38.9 at.%) was much higher than that in the 0.5 wt% reduced graphene oxide (RGO)-supported nanocomposite (19.4 at.%). This was because hydroxyl functional groups in the GO formed coordination bonds with zinc atoms in core shell ZIF-8@ZIF-67. XPS N 1s spectra indicated that the incorporation of oxygen-containing functional groups in GO resulted in the transition of binding form from Me–N 4 to Me–N 2 . The CO 2 adsorption capacity of GO-supported core shell ZIF-8@ZIF-67 gradually decreased from 2.15 to 1.30 mmol/g as GO weight percentage increased from 0.5 to 4 wt%, which was consistent with the decrease in BET surface area from 1378 to 585 m 2 /g and increase in peak pore diameter from 7.7 to 8.2 Å. Density functional theory (DFT) calculations demonstrated that unsaturated Zn–N 2 –O active sites in GO-supported core shell ZIF-8@ZIF-67 nanocomposites resulted in a decreased O C⋯Zn interaction distance from 4.65 (Zn–N 4 sites in core shell ZIF-8@ZIF-67) to 3.46 Å and an increased binding energy from 34.02 to 38.87 kJ/mol. Therefore, 0.5 wt% GO-supported core shell ZIF-8@ZIF-67 nanocomposites exhibited the highest CO 2 adsorption capacity of 2.15 mmol/g (at 273 K and 1 bar), 1.34 times higher than that of core-shell ZIF-8@ZIF-67.
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Nanoscale
·
2020
·Vol. 12
·期 32
·17064-17073
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IF 6.895
Jinghua Li,Daoming Zhu,Weijie Ma,Yang Yang,Ganggang Wang,Xiaoling Wu,Kunlei Wang,Yiran Chen,Fubing Wang,Wei Liu,Yufeng Yuan
Hepatocellular carcinoma is the fourth leading cause of cancer-related deaths globally. Advanced nanomaterials have emerged as effective approaches to liver cancer therapy such as photothermal therapy. However, limited penetration depth of photothermal agents (PTAs) activated in the NIR-I bio-window and thermoresistance due to heat shock proteins restrict the therapeutic efficacy of PTT in HCC. Herein, we prepared a Bi@ZIF-8 (BZ) nanomaterial by a simple one-step reduction method. Then, gambogic acid, a natural inhibitor of Hsp90, was efficiently loaded onto the BZ nanomaterial via physical mixing. The characterization of the nanomaterial and release of GA due to pH change or NIR-light irradiation were separately studied. Photothermal conversion efficiency was calculated, and therapeutic studies were carried out in vitro and in vivo. This nanomaterial exhibited a significantly enhanced drug release rate when the temperature was increased under acidic conditions and had good light stability under laser irradiation and a photothermal conversion efficiency of about 24.4%. In addition, this novel nanomaterial achieved good therapeutic effects with less toxicity in vitro. The BZ nanomaterial loaded with GA caused tumor shrinkage as well as disappearance and effectively downregulated Hsp90 expression in tumors in vivo. Moreover, this novel nanomaterial exhibited good biocompatibility and potential for application in low-temperature PTT with excellent tumor destruction efficacy.
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PubMed
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 10
·2044
·
IF 4.324
Weiwei Ye,Yu Zhang,Wei Hu,Liwen Wang,Yu Zhang,Ping Wang
A sensitive fluorescence resonance energy transfer (FRET) biosensor is proposed to detect 8-hydroxy-2′-deoxyguanosine (8-OHdG), which is a typical DNA oxidation damage product excreted in human urine. The FRET biosensor was based on carbon dots (CDs)-modified nanoporous alumina membrane with CDs as fluorescence donors. Gold nanoparticles were encapsulated in zeolitic imidazolate framework-8 to form Au@ZIF-8 nanoparticles as signal quenchers. CDs and Au@ZIF-8 nanoparticles were biofunctionalized by 8-OHdG antibody. The capture of 8-OHdG on the membrane substrates can bring Au@ZIF-8 nanoparticles closely to CDs. With 350 nm excitation, the fluorescence of CDs was quenched by Au@ZIF-8 nanoparticles and FRET effect occurred. The quenching efficiency was analyzed. The limit of detection (LOD) was 0.31 nM. Interference experiments of the FRET biosensor showed good specificity for 8-OHdG detection. The biosensor could detect urinary 8-OHdG sensitively and selectively with simple sample pretreatment processes. It shows applicability for detecting biomarkers of DNA damage in urine or other biological fluids.Keywords:nanoporous alumina membrane;fluorescence resonance energy transfer;Au@ZIF-8 nanoparticles;DNA oxidation damage;8-OHdG detection
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PubMed
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 3
·1-8
·
IF 5.479
Yuan Yue,Xu Xianzhen,Xia Jianfei,Zhang Feifei,Wang Zonghua,Liu Qingyun
Porous carbon was prepared from a zeolitic imidazolate framework (type ZIF-8) by carbonization at 800 °C (Z-800). A hybrid material was then obtained by direct co-electrodeposition of Z-800 with graphene oxide (Z-800/rGO). Z-800 is N-doped with good electrical conductivity and displays electrocatalytic activity. Z-800 readily undergoes mass transfer and also prevents graphene to agglomerate during electroanalysis. The hybrid was placed on a glassy carbon electrode (GCE) to obtain an electrochemical sensor for chloramphenicol (CAP) detection. Under the optimized conditions, the response of the modified GCE (typically measured at a low potential of −0.07 V vs. Ag/AgCl) is linear in the 1 to 180 μM CAP concentration range with a 0.25 μM detection limit (S/ N = 3). In our preception, the method has a wide scope in that it may be applied to the preparation of various kinds of other (doped) porous carbon/rGO composites for use in (bio)chemical sensors.
Schematic presentation of the preparation process of the materials and the electrochemical detection of chloramphenicol.
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高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Yingying Yang,Zengpei Guo,Wei Huang,Shiyu Zhang,Jingjing Huang,Hongjun Yang,Yingshan Zhou,Weilin Xu,Shaojin Gu
Facile construction of multifunctional fabrics with durability still remains a challenge in the past decade. In this work, we report a facile fabrication of non-fluorinated superhydrophobic and antibacterial cotton fabric surfaces via in situ growing zeolitic imidazolate framework-8 (ZIF-8) nanocrystals on cotton fibers under room temperature condition and subsequently coating with polydimethylsiloxane (PDMS). The surface morphology and chemical composition of treated fabric have been characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS). The as-prepared cotton fabric showed superhydrophobic property with a water contact angle (WCA) of 151.36° and a sliding angle of 3.6° and excellent antibacterial properties against E. coli and S. aureus. The durability of the superhydrophobic and antibacterial fabrics was evaluated by repeated washing and abrasion cycles. The as-prepared fabrics retained their excellent antibacterial property and superhydrophobicity after 300 cycles of abrasion and 5 cycles of washing. The robustness of superhydrophobicity and antibacterial activity made this method has wild application prospects in biomedical field in the future.
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高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Chenyang Zhao,Yi Huang,Yue Li,Chen Wang,Wenlin Yuan,Di Cheng,Tao Shen,Ji Zhang,Jie Liu,Chao Yang,Chunchun Wu,Qianhong Shen,Hui Yang
Nanocontainers encapsulating corrosion inhibitors are commonly incorporated into organic coatings to enable self-healing effects, thereby ensuring long-term anticorrosion performance. In this study, a novel dual corrosion inhibitor-loaded self-healing nanocontainer with core-shell structure was proposed for fabricating composite waterborne epoxy coatings with both active and passive corrosion prevention properties. The nanocontainer, named BTA-ZIF-8@LDH-Mo, was synthesized through the in-situ growth of molybdate-intercalated ZnAl layered double hydroxide (LDH-Mo) on the surface of 1H-benzotriazole-inbuilt zeolitic imidazolate framework (BTA-ZIF-8). Potentiodynamic polarization results showed that the I corr of bare Q235 carbon steel immersed in a 3.5 wt% NaCl solution decreased from 4.658 × 10 −6 A/cm 2 to 1.274 × 10 −6 A/cm 2 after introducing BTA-ZIF-8@LDH-Mo nanocontainers, resulting in a superior corrosion inhibition efficiency of 72.65 %. Electrochemical impedance spectroscopy further demonstrated that the |Z| f=0.01Hz of epoxy coating doped with BTA-ZIF-8@LDH-Mo reached 4.24 × 10 9 Ω·cm 2 after 42 d of immersion in 3.5 wt% NaCl solution, approximately 30 times higher than that of pure EP coating. Moreover, investigations on artificially scratched coatings indicated that the incorporation of BTA-ZIF-8@LDH-Mo nanocontainers effectively mitigated the corrosion process by forming an inhibiting layer on the metal substrate that impeded the corrosion process. The dual corrosion inhibitor strategy relies on the synergistic action of BTA pre-loaded in ZIF-8 nanoparticles and molybdate ( MoO 4 2- ) intercalated in LDH interlayers for active corrosion protection . Additionally, the nanocontainers enhance passive protection by elongating the diffusion paths of corrosive media and trapping chloride ions. This nanocontainer design offers a facile strategy for fabricating a smart coating with the excellent anticorrosion properties.
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高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Tianlu Li,Aixian Tian,Wei Li,Yun Zhao,Minfang Chen
A one-step hydrothermal method was used to deposit a in situ composite coating on a magnesium alloy by adding ZIF-8 nanoparticles modified by polydopamine (PDA) (PDA@ZIF-8) as a photoabsorbing agent and growing Mg-Al double-layer hydroxide (LDH). The results showed that PDA@ZIF-8 nanoparticles had significant influence on the corrosion resistance, antibacterial properties, and biocompatibility of the LDH coating, and improved the compactness and crystallinity of LDH by regulating the growth of its lamella. Compared with the LDH coating, the corrosion current density of the composite coating by adding PDA@ZIF-8 nanoparticles was reduced from 2.28×10 -5 to 1.86×10 −6 A·cm -2 . And its immersion corrosion rates were 0.89 ± 0.05 mm·year −1 in SBF solution for 8 days. Meanwhile, it had antibacterial efficacy of 99.99% and 99.99% against Escherichia coli and Staphylococcus aureus , respectively, with the in vitro photothermal conversion efficiency of 29.77%. Moreover, besides greatly improving osteogenic activity and biocompatibility in vitro, the composite coating with the addtion of PDA@ZIF-8 nanoparticlescan also drive M1-type macrophages to M2-biased phenotypes after exposure to 808 nm NIR light, changing in macrophage secretion for tissue regeneration, and fulfill the excellent antibacterial properties in vivo antibacterial implantation test. This method can provide an effective way and strategy for regulating and enhancing the antibacterial functionalization and improving the corrosion resistance of the double-layer hydroxide coating on the surface of magnesium alloys.
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