ChemistrySelect
·
2023
·Vol. 8
·期 18
·e202204785
·
IF 2.1
Tianhao Ma,Haixu Li,Xiaoguang Liu,Haobo He,Tiannan Jiang,Junsheng Wang,Bin Li,Wendong Xue,Shubin Ren,Jialin Sun
Graphical To activate peroxymonosulfate (PMS) and degrade dyes, composite catalysts containing cobalt, nitrogen-doped porous carbon and carbon nanotubes (CNTs) were prepared. The catalyst (CNT@ZIF-800) showed faster degradation rates towards congo red (98.5 %, 5 min) and slower rates towards rhodamine B (90.7 %, 30 min) than methylene blue (94.8 %, 30 min). It had 14.5 % more Co−Nx/pyridinic-N sites than C-ZIF-800. Such sites, together with cobalt and CNTs, had activated PMS into 1 O 2 , SO 4 − ⋅ and ⋅OH, which were primary and secondary dye degradation species. To activate peroxymonosulfate (PMS) and degrade methylene blue (MB), cobalt and nitrogen-doped porous carbon composite catalysts were prepared through pyrolysing zeolitic imidazolate framework ZIF-9 and dicyandiamide (DCDA) at 700–900 °C with various mass ratios. Powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller results showed that Co, porous carbon and carbon nanotubes (CNTs) co-existed in the catalyst prepared at 800 °C with a ZIF-9/DCDA ratio of 1 : 3. Thermogravimetric analysis suggested that CNT@ZIF-800 had a higher ratio of graphitic to turbostratic carbon than CNT@ZIF-700. It had degraded 94.8 % MB within 30 min, which was about 1.9 times faster than its counterpart C-ZIF-800. It also showed faster degradation rates towards Congo red (98.5 %, 5 min) and slower rates towards rhodamine B (90.7 %, 30 min) than MB. Furthermore, XPS revealed that it had 14.5 % more Co−Nx/pyridinic-N active sites than C-ZIF-800. EPR suggested that 1 O 2 might be the primary catalytic species whereas the SO 4 − ⋅ and ⋅OH the secondary ones. The formation mechanism of such active species might be originated from the synergistic activation of PMS by CNTs, Co−Nx/pyridinic-N and abundant Co sites in the CNT@ZIF-800. This work not only provided efficient Fenton-like catalysts for MB degradation, but also clarified the catalytic mechanism.
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PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Song Xiao,Xiangkang Cao,Zehua Dong,Xiaoze Ma,Xinxin Zhang,Guangyi Cai
Ce-based imidazole complex (Ce-IM/ZIF-8) nanoparticles (NPs) were fabricated by doping cerium ions (Ce 3+ /Ce 4+ ) in zeolite imidazolate framework-8 (ZIF-8) through a one-pot co-precipitation method. The stimuli-responsive release of Ce 3+ /Ce 4+ species from the Ce-IM/ZIF-8 NPs under acidic conditions was confirmed by UV–Vis spectroscopy. Electrochemical impedance spectroscopy and scanning electron microscope were applied to evaluate the corrosion inhibition efficiency of Ce-IM/ZIF-8 NPs on bare aluminum alloy , and it demonstrates that the released Ce 3+ /Ce 4+ , Zn 2+ ions and imidazole could absorb on the surface of Al alloy by chelating effect, forming a compact corrosion barrier on the Al substrate. Furthermore, the Ce-IM/ZIF-8 NPs were encapsulated into epoxy (EP) resin to obtain a composite coating , and it is found that when the NPs addition amount was 1 wt%, the EP-based composite coating exhibits excellent corrosion barrier and promising self-healing ability, with its impedance at 0.01 Hz maintaining 2.2 × 10 8 Ω·cm 2 even after 6 cycles of aging tests (720 h), which could be ascribed to the synergistic inhibition of released Ce ions and imidazole molecules on Al substrate beneath the defective coating.
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SYNTHETIC METALS
·
2021
·
IF 3.266
Yaoyao Hao,Yinyue Zhou,Nuohan Xu,Kaixun Tian,Pei Liang,He Jiang
Iron oxide @ poly(m-phenylenediamine) (Z) particles (Fe 3 O 4 @PmPD(Z)) were synthesized by in-situ polymerization of PmPD on the Fe 3 O 4 nanoparticles via ZIF-8 intermediate platform to remove Cr(VI) from wastewater. Analyses of FT-IR, TEM, etc. were performed to evaluate the morphology and structure of synthesized material, and the results confirmed the successful synthesis of Fe 3 O 4 @PmPD(Z). In addition, the TEM and BET analyses results show that the PmPD shell is a flocculating structure, and the increased specific surface area increases the contact with Cr(VI). The Fe 3 O 4 @PmPD(Z) exhibits much better Cr(VI) adsorption performance than Fe 3 O 4 @PmPD, and its adsorption capacity is increased by about 30%, the maximum Cr(VI) adsorption capacity can reach 371.75 mg g −1 at 318 K. According to FT-IR, XPS , and EDS , the removal mechanisms can be attributed to the redox reaction of Cr(Ⅵ) and NH to form N and Cr(Ⅲ), and N shares electron pair with Cr(Ⅲ) to form chelation. At the same time, the appearance of N + also contributes to the removal of Cr(Ⅵ) by generating electrostatic attraction with the negatively charged HCrO 4 - . Besides, the Fe 3 O 4 @PmPD(Z) also exhibits excellent properties of recovery and reuse. Therefore, the current work proves that Fe 3 O 4 @PmPD(Z) has the potential to remove heavy metals in wastewater.
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ELECTROCHIMICA ACTA
·
2023
·
IF 6.6
Shaoshao Jiao,Chen Li,Yaowen Zhang,Jianyang Gao,Zhenjiang Li,Kang Liu,Lei Wang
Nitrogen-doped porous carbon materials based on porous organic polymers and metal-organic framework derivatives are prepared for efficient ORR electrocatalysts and supercapacitor. The classic MOFs material ZIF-8 is selected as the core material. After ZIF-8 is pyrolyzed in an inert atmosphere at 900℃, the low-boiling Zn volatilizes, resulting in a hierarchical open-structured carbon-nitrogen material, which is beneficial to the transport of electrolytes in the electrocatalytic process. To further increase the nitrogen content, the designed nitrogen-rich IPOP-coated ZIF-8 composites were immersed in an aqueous solution of sodium dicyandiamide. The catalyst obtained by replacing Cl − and Br − in the porous organic polymer with nitrogen-containing ions and calcined at high temperature is a porous structure material containing a high concentration of active pyridine nitrogen. In addition to exhibiting superior oxygen reduction reaction (ORR) electrocatalytic activity, NC-900 shows superior stability and good methanol tolerance in comparison to commercial Pt/C catalysts in alkaline media as well as acidic media. Furthermore, in 6 M KOH electrolyte, NPCs-based supercapacitor exhibits a high capacitance of 225 F g − 1 with a current density of 1 A g − 1 and possesses good cycling stability (95.75% capacitor retention after 10,000 cycles).
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xianhong Deng,Wenbin Wu,Shuangqin Tian,Yi He,Shujie Wang,Bifang Zheng,Kai Xin,Ziqin Zhou,Lihong Tang
In this study, we employed a straightforward in-situ synthesis strategy to fabricate multi-site adsorption functional composites known as aminated chitosan@ZIF-8 (AmCs@ZIF-8) for the efficient removal of Cu(II) and Congo red. The AmCs@ZIF-8 adsorbed Cu(II) at pH 5 and Congo red at pH 3 with excellent removal efficiency values of 94 % and 100 % respectively. The maximum adsorption capacity for Cu(II) and Congo red are obtained as 785 mg g −1 and 1156 mg g −1 , respectively. Interestingly, AmCs@ZIF-8 composites exhibited an excellent removal efficiency (>80 %) after reusing them for four sequential cycles. Analysis of the adsorption isotherm and kinetic data indicated that chemisorption primarily governed the adsorption of Cu(II) and Congo red by AmCs@ZIF-8. Furthermore, we elucidated the adsorption energy of Cu(II) and Congo red on the AmCs@ZIF-8 composite through density functional theory. Specifically, the adsorption energy values for Cu(II) with AmCs and ZIF-8 were −20.907 and −57.809 kcal·mol −1 , and −26.514 and −16.242 kcal·mol −1 for Congo red, respectively. The efficient adsorption mechanism of Cu(II) and Congo red on the AmCs@ZIF-8 composite can be attributed to the synergistic effects of chelation, electrostatic attraction, ion exchange, and hydrogen bonding through the analysis of experimental characterization and theoretical calculation. Therefore, AmCs@ZIF-8 composites elevate the adsorption capacity of Cu(II) and Congo red in a single-component system and exhibit high removal efficiency (>90 %) in the context of the Cu(II)-Congo red binary system.
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Arabian Journal of Chemistry
·
2023
·
IF 6
Yujie Xu,Xiaoli Zhang,Shuyi Liang,Congmin Niu,Jiayi Guo,Chunbo Lu
There is a serious threat to public health posed by the rapid spread of methicillin-resistant Staphylococcus aureus (MRSA). Photodynamic sterilization is the most effective method of combating bacterial infection, especially multidrug-resistant bacterial infection. In this study, zeolitic imidazolate framework-8 (ZIF-8) nanoparticles, one of the most attractive metal–organic framework material, were used to encapsulate the indocyanine green (ICG, a potent PS); after that, hyaluronic acid (HA) coating was applied to the nanoparticle to create a host cell-tracking nanoplatform (ICG@ZIF-8/HA). Upon near-infrared light irradiation, ICG@ZIF-8/HA exhibit excellent efficacy in producing reactive oxygen species (ROS) and killing multidrug-resistant bacteria in vitro . After the tail vein injection, ICG@ZIF-8/HA can precisely deliver to lung infection sites, and display an effective PDT-based elimination of multidrug-resistant bacteria in mouse lung infection models. These results suggest that the ICG@ZIF-8/HA nanoplatform may exhibit potent curative effects on infectious diseases.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wenli Yao,Fenghui Qin,Ziwei Zhao,Zhijun Ma,Chunyang Hu,Lei Zhou,Yian Zheng
Perfluorinated compounds have serious impacts on ecosystems and threats to human health, and exploring technologies to remove them is urgently needed. Using Calotropis gigantea fiber (CGF) as the biological template, the precursor of ZIF-67 was firstly in-situ anchored in the inner/outer walls of the fiber and then pyrolyzed to yield the composite catalyst labelled as Co/C@C. In combination with peroxymonosulfate (PMS), the advanced oxidation system, i.e. Co/C@C/PMS, was constructed for the catalytic removal of perfluorooctanoic acid (PFOA) from water. The experimental results showed that under the optimized conditions of PMS dosage of 1.0 g/L, catalyst dosage of 0.5 g/L and pH 3.0, PFOA achieved the degradation efficiency of 72.2% within 4 h at ambient temperature. Combined with free radical quenching, electron paramagnetic resonance, electrochemistry and nitroblue tetrazolium dichloride-based UV-Vis analysis, the reactive oxygen species and diverse pathways were identified, including SO 4 • − , O 2 • − , O 2 1 and electron transfer process in the Co/C@C/PMS system. The coexisting anions ( HCO 3 − , Cl − , H 2 PO 4 − and NO 3 − ) and real wastewaters showed no significant effects on PFOA degradation, demonstrating that the Co/C@C/PMS system has good resistance to external ions and different media. After four cycles, the degradation efficiency of PFOA was still 62.8%, indicating that Co/C@C has high stability and good reusability. The degradation products of PFOA were mainly short-chain perfluorinated carboxylic acids (C4-C7) and hydrogen-substituted perfluorinated compounds. Based on quantitative structure-activity relationship analysis, their ecotoxicity was finally evaluated via ECOSAR method. In short, natural CGF derived Co/C@C has great potential for the reduction of emerging PFOA to achieve a sustainable water environment for humans.
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PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Fan Zhou,Yanqi Ma,Ying Chen,Li Zhang,Xinxin Sheng
Endowing composite coatings with robust anticorrosion properties for metal substrates in intricate corrosive environments, such as conferring self-healing and antibacterial capabilities through the integration of multifunctional nanofillers, constitutes a pivotal approach in the advancement of efficient anticorrosive coatings. In this study, a triple-functional anticorrosion coating entailed the simultaneous integration of graphene oxide (PG) with antibacterial capability, and BTA@ZIF-8/PM (PZ) with self-healing performance, into a waterborne epoxy (PGZ/WEP). The logarithm of the lowest frequency impedance modulus of PGZ/WEP demonstrated a notable value of 8.2 Ω cm 2 following a 28 days immersion in simulated seawater, indicating an escalation of approximately 2.7 orders of magnitude compared to that the reference of WEP. For the antibacterial capabilities of coatings, an enhanced antibacterial rate ( R ) of up to 55.9 % was observed. Moreover, an in-depth analysis was undertaken to explain the underlying anticorrosion, self-healing, and antibacterial mechanisms of composite coatings. In conclusion, the PGZ/WEP composite coating manifests self-healing, antibacterial, and anticorrosive functionalities, thereby demonstrating exceptional adaptability to intricate corrosion-prone environments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Min Jia,Fupei Xu,Fei Zhai,Xiaoying Yu,Meixia Du
BPA aptamers functionalized cerium oxide nanoparticles encapsulated in zeolitic imidazolate framework-8 (CeO 2 @ZIF-8/Apt) were developed to fabricate an all-in-one portable platform for on-site quantitative detection of BPA. By combining biocomposites with a 3,3′,5,5′-tetramethylbenzidine (TMB)-based sodium alginate (SA) hydrogel and smartphone-based RGB analysis, highly sensitive and convenient monitoring of BPA was achieved. CeO 2 @ZIF-8 composites were constructed using a novel surfactant-modified concentration-controlled synthesis strategy. After being functionalized with BPA aptamers, CeO 2 @ZIF-8/Apt biocomposites were used as target-response colorimetric probes for target recognition and signal transduction. The oxidase-like activity of CeO 2 @ZIF-8 was effectively sealed by BPA aptamers and controllably released in a concentration-dependent manner through aptamer-BPA reactions. Utilizing SA hydrogels containing TMB in the caps, a one-step sample addition and one-pot detection can be conveniently achieved and reliably quantified by smartphone-based RGB analysis in an instrument-free way. The detection range of this portable detection platform is 50 pg/mL to 500 ng/mL with limit of detection calculated as 34.88 pg/mL, comparable to that of conventional detection in the solution system (4.57 pg/mL). The recoveries in tap water, apple juice, and milk ranged from 91.02 % and 106.75 %. This work contributes new insights into the design of all-in-one detection platforms for contaminants monitoring in resource-constrained regions.
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PubMed
高影响因子
MOLECULES
·
2020
·Vol. 25
·期 19
·4432
·
IF 3.267
Quan Pan,Yuelin Kong,Kuan Chen,Mi Mao,Xiaohui Wan,Xiaoyan She,Qingsong Gao,Yu He,Gongwu Song
In this work, we report the synthesis of Cu-Ag bimetallic nanopartiles and g-C3N4nanosheets decorated on zeolitic imidazolate framework-8 (ZIF-8) to form a Cu-Ag/g-C3N4/ZIF hybrid. The hybrid was synthesized and characterized by Transmission electron microscopy (TEM), Fourier transformed infrared (FTIR), the X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Cu-Ag/g-C3N4/ZIF hybrid has intrinsic peroxidaselike catalytic activity towards the oxidation of TMB in the presence of H2O2. The situ synthesis of Cu-Ag bimetallic nanopartiles on 2D support such as g-C3N4nanosheets would significantly enhance the peroxidaselike catalytic properties of individual Cu-Ag bimetallic nanopartiles and the g-C3N4nanosheets. After loading of Cu-Ag bimetallic nanopartiles and g-C3N4nanosheets on the ZIF-8, the hybrids exhibited superior peroxidaselike catalytic activity and good recyclability. Then, this method was applied for detecting glucose in human serum, owing the significant potential for detection of metabolites with H2O2-generation reactions.Keywords:Cu-Ag/g-C3N4/ZIF hybrid;nanozyme;colorimetric detection;H2O2;glucose
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MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Yuan Li,Yutong Li,Yan Wang,Guodong Ma,Xinsheng Liu,Yonghong Li,Jeffrey Soar
1-hydroxypyrene (1-OHP) is an important biomarker for evaluating human exposure to polycyclic aromatic hydrocarbons (PAHs). In this work, a simple sensor based on nano-carbon paste electrode modified with zeolitic imidazolate frameworks (ZIF-8)/ionic liquid composites was developed for convenient and fast electrochemical detection of 1-OHP. The structure of ZIF-8 and the morphologies of different electrodes were investigated by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The electrochemical behavior of l-OHP on the constructed modified electrode was studied using differential pulse voltammetry (DPV). Under the optimized conditions, the fabricated sensor gave a linear calibration curve of the concentration ranging from 0.05 to 20 μM with a detection limit of 0.01 μM for 1-OHP. The proposed method was successfully applied to the determination of 1-OHP in urine samples with the recoveries of 94.2%–103.2%.
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Journal of Environmental Chemical Engineering
·
2020
·
IF 4.3
Xiaofeng Huang,Qiulin Deng,Huiwei Liao,Hongquan Deng,Jinlong Jiang,Lixiong Zhang,Xinjun Yao
The treatment process of metal plating wastewater in industry usually exists excessive consumption of chemicals, coproduction of sludge and complex reuse of metal. At present, some available technologies have been designed for effective removal of specific metal ions rather than entire metals ions in effluents. Herein, a novel strategy of treating waste with waste is proposed that using metal plating wastewater containing Zn(Ⅱ) to prepare 3D Luffa cylindrical (LC) / heterogeneous ZIFs (h-ZIF-8) composite (LC/h-ZIF-8) for photocatalytic degradation of organic pollutants (Nitrofurazone (NFZ), Methylene blue (MB), Rhodamine B (RhB) and Congo red (CR)) and mixed-dye wastewater. The strategy realized the efficient treatment of electroplating wastewater, expediently reuse of metal ions and removal of organic contaminants . Moreover, investigations of cycling performance indicated the photocatalytic stability and easy separation from water. Furthermore, the spectroscopy and electrochemical are employed to elaborate possible degradation mechanisms, expounding the LC/h-ZIF-8 possess lower recombination rates of carriers and transfer resistance of electron compared with ZIF-8. Therefore, the work proposes a new strategy for the efficient treatment of metal wastewater and achieves the combination of resource recovery and wastewater treatment with the advantages of simple operation and mild conditions.
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危险品化学品经营许可证（带存储）