SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Shengnan Li,Jiwei Jiang,Shih-Hsin Ho,Fengxiang Li,Wenlu Zeng
Microbial fuel cells (MFCs) systems are up-and-coming technologies for renewable energy production and wastewater treatment simultaneously. However, the inactive oxygen reduction reaction (ORR) on the cathode markedly limits the functioning of MFCs. Therefore, the cathodic catalyst is one of the crucial components in MFCs, this paper presents the removal of the antibiotic sulfamethoxazole (SMX) from water using single-chamber MFCs with Fe-Co-C/N as electrocatalysis. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS) were conducted to illustrate the structure and elemental composition of Fe-Co-C/N. The results obtained by the rotating disk electrode (RDE) method showed an extraordinary electrocatalytic activity of Fe-Co-C/N towards ORR in O 2 -saturated 0.1 M KOH. Furthermore, the degradation of SMX by MFCs that applied modified electrodes was also studied. The results demonstrated that using Fe-Co-C/N as air–cathode catalysts exhibited the degradation efficiency of 61.64% towards 6 mg/L SMX with 48 h. In addition, cyclic voltammetry (CV) analysis showed that the peak current of the biofilm in the PBS solution (without adding SMX) was significantly higher than that of the solution with SMX addition at 6, 18, and 30 mg/L. Moreover, MFC performance was also evaluated by measuring electrochemical impedance spectroscopy (EIS), power generation, and polarization curves. Last but not least, the high-throughput sequencing-based metagenomic technique was used to explore the microbial community diversity, functional genes in MFCs, and fate of ARGs. SMX addition raised the abundances of sul1 and sul2 as resistance genes, which enhanced microbial resistance, the coping capability of SMX toxicity, and the adjustment of the damage from SMX. The obtained results suggest that Fe-Co-C/N is a feasible catalyst for MFC cathodes owing to its satisfactory performance in terms of SMX wastewater treatment and power production.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 32
·9856-9864
·
IF 6.641
Di Yin,Ming-Liang Wang,Ying-Zi Wang,Xun Hu,Bo Liu,Hong Liu,Lulu Ma,Guang-Gang Gao
A ternary nanocomposite containing ZnO, ZnS and MoS2 (ZnMoNCs) has been firstly synthesized by Keggin-type polyoxomolybdate and ZIF-8 as starting materials to provide Mo and Zn sources simultaneously. As compared to the mono- or bi-component complex, ZnMoNCs present more sensitive and stable surface-enhanced Raman scattering (SERS) activity. When rhodamine 6G is used as a probing molecule, the detection limit of 10−9 mol L−1 can be achieved on the ZnMoNC substrate with the enhancement factor (EF) of 1.4 × 108, which is the highest sensitivity among the known semiconductor SERS substrates. The increased adsorption sites and the synergistically improved charge transfer are conducive to the large enhancement of the SERS activity. It was also proved that the ZnMoNC substrate possesses high stability and self-cleaning properties, and can be reused in SERS detection without losing its activity even after 5 cycles. This work paves a new way to the design of new semiconductor SERS substrates by the utility of a multicomponent complex.
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JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 8
·3167-3180
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IF 3.442
Ren Lipei,Yu Yan,Yang Yuan,Zhang Qian,Xiao Xingfang,Liu Ruina,Xu Weilin
Zeolitic imidazolate framework-8 (ZIF-8) is regarded as an excellent adsorbent material for removing diverse toxic or hazardous gases. However, its milli- to nanoscale size typically restricts its applications. In this study, we demonstrate the ZIF-8 nanocrystals assembled on TiO 2 -coated activated carbon fiber felts via atomic layer deposition (ZIF-8@ALD-ACF felts), which can be used as a highly efficient adsorbent for HCHO removal. Using the TiO 2 -coated ACF felts as substrates via ALD can provide large number of growth sites for ZIF-8 nanocrystals, which results in fast and highly efficient removal of HCHO. Furthermore, ZIF-8@ALD-ACF felts achieve a highly efficient removal of HCHO under ultraviolet (UV) light. HCHO can be completely removed at high concentration within 110 min. Moreover, under UV light, it can be completely removed at low concentration within 6 min. The micropores in ACF and nanocages in ZIF-8 are suitable for small molecular HCHO uptaking and provide sufficient contact time for photocatalysis by TiO 2 . The ALD technology provides a useful methodology for the practical application of MOF-based materials.
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EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
·
2019
·Vol. 2019
·期 22
·2761-2767
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IF 2.578
Hongchen Yang,Shengbo Zhang,Mei Li,Xiao Liu,Jinyu Han,Xinli Zhu,Qingfeng Ge,Hua Wang
Graphical Hollow N-doped carbon nanocages incorporating Au and ZnO nanoparticles derived from ZIF-8 were synthesized. Au 0.40 -ZnO/CN incorporates Au and ZnO nanoparticles. Under visible light irradiation, Au 0.40 -ZnO/CN exhibits a significantly enhanced H 2 production rate from formaldehyde alkaline solution, which is 12 times and 2.6 times of those of ZnO/CN and Au/CN, respectively. Hollow carbon nanostructured materials incorporating metals or metal oxides have attracted considerable interest in photocatalysis. Herein, novel hollow N-doped carbon nanocages incorporating Au and ZnO nanoparticles derived from ZIF-8 were successfully synthesized. Firstly, ZIF-8 nanocrystals were treated with chloroauric acid solution (HAuCl 4 ) to produce hollow Au X @ZIF-8 cubes through acid etching of cores and cation exchange. Then, the Au X @ZIF-8 cubes were used as precursors to obtain Au X -ZnO/CN after pyrolysis in a N 2 atmosphere. The resulting Au 0.40 -ZnO/CN had a uniform hollow structure with ≈ 30 nm shells conformal to ZIF-8 dimension while incorporating ≈ 5 nm nanoparticles of Au and ZnO and exhibited remarkable photocatalytic activity and excellent recyclability for hydrogen production from formaldehyde (HCHO) alkaline solution under visible light irradiation. The results demonstrated that incorporation of Au greatly improves the visible light absorption and charge separation via SPR effect. Furthermore, the ZIF-8-derived hollow N-doped carbon cages can expose more uniformly disperse active sites with conductive support. The methodology used here provides a novel approach for preparing hollow hybrid carbon materials with visible-light-driven photocatalytic applications.
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CARBON
·
2018
·
IF 7.082
Zhiwei Li,Hongyu Mi,Lang Liu,Zhengyu Bai,Jinping Zhang,Qing Zhang,Jieshan Qiu
Core-shell hybrid precursors (ZIF-8/ PP -SiO 2 ) engineered by zeoliticimidazolate framework (ZIF-8) depositing on the polyelectrolyte-decorated silica ( PP -SiO 2 ) are successfully transformed into unusual N-rich hollow carbon shell frameworks (NHCSFs) with adjustable physicochemical properties by the layer-by-layer assembly, interface engineering and subsequent carbonization , which is the first example that systematically elucidates the formation and structure-property correlation of unique three-dimensional (3D) carbon frameworks. The optimal NHCSF-3 displays superior performance with high capacitance approaching 253.6 F g −1 at 1 A g −1 , excellent rate capability delivering 79% capacitance retention after a 50-fold increase of the rate, and long lifetime (92.1% retention for 20000 cycles). The studies on alkaline and neutral NHCSF-3//NHCSF-3 supercapacitors demonstrate that the latter with high voltage up to 1.6 V using a Na 2 SO 4 electrolyte can deliver high energy density of 13.3 Wh kg −1 . The distinctly enhanced performance illustrates that, except for the factors such as morphology, surface area, pore volume , and N-doping level, hierarchical porosity also significantly boosts electrochemical properties of the materials because of providing efficient charge/mass transport. Overall, this research provides an efficient platform for precisely modulating the structure of MOF-based carbons to develop multifunctional hollow architectures for satisfying enormous demands in upcoming energy devices.
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TALANTA
·
2018
·
IF 4.244
Yue Wang,Xue Li,Geoffrey I.N. Waterhouse,Yunlei Zhou,Huanshun Yin,Shiyun Ai
In this work, a novel and sensitive photoelectrochemical (PEC) strategy was designed for protein kinase A (PKA) detection, comprising carbon microsphere (CMS) modified ITO electrode, TiO 2 as the phosphate group recognition material and graphite-carbon nitride (g-C 3 N 4 ) as photoactive material. For the first time, gold nanoparticle decorated zeolitic imidazolate frameworks (Au-ZIF-8) was employed to fabricate biosensor for PKA activity assay with the function of substrate peptide immobilization and signal amplification. Firstly, substrate peptides were assembled on the Au-ZIF-8/CMS/ITO surface through the covalent bonding between the gold nanoparticles (AuNPs) and sulfydryl groups of the peptides. Then, in the presence of ATP , phosphorylation of the substrate peptide was achieved under PKA catalysis. Finally, TiO 2 -g-C 3 N 4 composites were further modified on the electrode surface based on bonding between TiO 2 and phosphate groups created via phosphorylation of the peptide (yielding TiO 2 -g-C 3 N 4 /P-peptide/Au-ZIF-8/CMS/ITO), which is different with our previous work by directly immobilizing g-C 3 N 4 composite on electrode surface. The developed method showed a wide linear range from 0.05–50 U mL −1 . The detection limit was 0.02 U mL −1 (S/N = 3). The constructed biosensor exhibited high detection specificity for PKA. In addition, the wide applicability of this biosensor was demonstrated by evaluating the inhibition ability of ellagic acid towards PKA.
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高影响因子
Small
·
2016
·Vol. 12
·期 40
·5564-5571
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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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EUROPEAN POLYMER JOURNAL
·
2024
·
IF 5.8
Dan Zhang,Yue Zhao,Qi He,Kaixuan Feng,Zhi Hu,Guohong Ma,Zengxi Pan
Magnesium (Mg) alloys are susceptible to being attacked by corrosive ions in practical application environments, which limits their widespread application as the most promising engineering material. Herein, the superhydrophobic composite coating PVB/STA/ZIF-8@SiO 2 (PSZS) has been designed on the surface of Mg alloy by using a drop coating method to improve its corrosion resistance. In this study, we provide an approachable decoration strategy for hydrophobic and hierarchical modification of zeolite imidazolate frameworks (ZIF-8) with stearic acid (STA) and SiO 2 , and combined with polyvinyl butyral (PVB) to form a composite coating with excellent performance on the substrate surface. Notably, the PSZS composite coating exhibited superhydrophobic and the contact angle is greater than 150° after 300 cm of mechanical friction. The electrochemical testing of the PSZS composite coating indicated that it greatly protected the Mg alloys from corrosion. Moreover, the PSZS coating displayed highly effective corrosion resistance even after being immersed in 3.5 wt% NaCl aqueous solution for 7 days. Overall, the PSZS composite coating with the advantages of corrosion resistance, corrosion durability, superhydrophobic, abrasion resistance and simple preparation process broadens the horizons of Mg alloy corrosion resistance research.
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Food Chemistry-X
·
2024
·
IF 6.5
Doudou Lei,Lingling Li,Pengyue Song,QingBin Xu,Lihua Huang,Xiao Ma,Lidong Zhou,Weijun Kong
Glyphosate (Gly) is a widely-used herbicide in food production, while, the residue of which due to the long-term and excessive overspray poses serious threats to public health. The development of reliable methods for its sensitive detection is of great urgency. In this study, a novel ratiometric fluorescent nanosensor by encapsulating N-doped carbon dots (N-CDs) and gold nanoclusters (AuNCs) in zeolitic imidazole framework-8 (ZIF-8) as the dual-emissive fluorescence probes at 410 and 650 nm, respectively, was constructed for Gly detection. Due to the adsorption property of ZIF-8, the N-CDs/AuNCs@ZIF-8 nanoprobes accumulated Cu 2+ to quench the red fluorescence of AuNCs, and the blue fluorescence of N-CDs was stable. While thiocholine, a product of acetylthiocholine, hydrolyzed by acetylcholinesterase could coordinate with Cu 2+ , resulting in significant fluorescence recovery of AuNCs. This phenomenon was utilized for the quantitation of Gly, due to its inhibitory effect on acetylcholinesterase activity. By calculating the fluorescence intensity ratio ( I 650 /I 410 ), Gly in real sample could be accurately determined in a concentration range of 2–100 ng/mL with a limit of detection of 1.92 ng/mL because of the anti-interference and the self-correction ability of the two fluorescence signals. The N-CDs/AuNCs@ZIF-8 nanoprobes-assisted ratiometric fluorescent nanosensor exhibited unique merits of rapid construction, simple operation, high specificity, and good accuracy for Gly in edible and medicinal malt samples with recoveries of 93.7–108.2 %. This study presents a multiple tool for the versatile sensing of trace pesticides in more food matrices, which can be extended to a full range of environmental and food safety applications.
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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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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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