APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Yingnan Yang,Haifeng Yang,Pengfei Tang,Xiaodong Li,Weimiao Wang,Guangcheng Yang
Laser induced high temperature pulse (HTP) generation has been widely used in some high-immediacy applications requiring dramatic temperature changes. Recent years researchers put interest in light-to-heat (include photothermal, light induced exothermic reaction and combination of both) materials to reduce the initiating energy of the laser ignition. However, the laser energy for realizing sufficient light-to-heat conversion is still high. MXene exhibits excellent light absorption, high light-to-heat conversion efficiency and has abundant metastable atoms which trend to undergo exothermic chemical reactions, but its incomplete oxidation affects its total heat release when the laser power is relatively high. Herein, we have prepared a ZIF-67/Ti 3 C 2 MXene intercalated membrane. It is found that porous ZIF-67 exhibits a synergistic effect on MXene and can significantly improve its physical/chemical coupled HTP by enhancing its light absorption and subsequent energy release during its oxidation. ε 2,4,6,8,10,12-(hexanitrohexaaza) cyclododecane (ε-CL-20) laser ignition experiments prove that ZIF-67/Ti 3 C 2 MXene intercalated membrane exhibits better ignition performance than pure MXene membrane by reducing both ignition threshold (151.2 mJ) and ignition delay (21 ms) at a low laser power intensity (59.7 W/cm 2 ). This work can provide an insight for the structural design of new light-to-heat membranes.
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CRYSTENGCOMM
·
2023
·Vol. 25
·期 7
·1076-1089
·
IF 3.1
Aheyelikai Yeerken,Jiangli Lin,Xiaotian Wang,Yulu Luo,Hongying Ma
Triphenylmethane dyes not only can be utilized to dye silk, leather, and paper, but they also play an important part in treating parasitic, fungal, and bacterial infections of fish and fish eggs. Although these dyes are inexpensive and have a wide range of applications, they are poisonous. Therefore, their removal from wastewater is crucial for water purification. Metal–organic (MOF)/polymer porous composites were prepared by compounding highly porous MOFs with organic polymers with good stability and hydrophilicity to realize the highly efficient and stable adsorption of triphenylmethane dyes in wastewater over multiple cycles. Porous ZIF-67/PES composite microspheres for the adsorption of triphenylmethane dyes were successfully synthesized via in situ growth, and their adsorption conditions were optimized on the basis of time, pH and NaCl concentrations to investigate their adsorption performance. The as-synthesized porous ZIF-67/PES composite microspheres were characterized by using scanning electron microscopy, X-ray diffractometry, and Fourier transform infrared spectroscopy. Their adsorption kinetics and mechanisms were also studied. Their reusability and stability after cyclic adsorption processes were also investigated. The maximum adsorption capacity of the porous ZIF-67/PES composite microspheres for MG, FA and CV was 5743.28 mg g−1, 2176.52 mg g−1, and 122.78 mg g−1, respectively. Therefore, porous ZIF-67/PES composite microspheres are a potential and efficient absorbent for triarylmethane dye removal.
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Carbon Letters
·
2023
·Vol. 33
·期 2
·573-585
·
IF 4.5
Zhu Wenjun,Zuo Xiaohua,Deng Xiangyi,Zhang Xinhao,Yao Chuang,Wang Xiaobo
Core–shell ZIFs wrapped CuO hybrid materials (CuO@ZIF-67(Co)) were designed, synthesized, characterized, and employed as peroxymonosulfate (PMS) activators to degrade methylene blue (MB). It demonstrated outstanding catalytic activity on account of the unique structure and the synergistic effect between CuO cores and ZIF-67(Co) shells, resulting in complete degradation of MB (10 mg/L) in 1 min. Reactive oxygen species (ROSs) research showed that both SO 4 − and OH were responsible for the removal of MB. The synergistic activation mechanisms in the CuO@ZIF-67(Co)/PMS system were investigated, which mainly involved the effective electron transfer of CuO and ZIF-67(Co) for accelerating the cycle of Cu II /Cu I and Co III /Co II . This study broadens the application of MOF-derived materials for wastewater treatment.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 31
·10662-10671
·
IF 4
Dan Wen,Yan Ma,Guomei Mu,Qiuping Huang,Xuefeng Luo,Dunmin Lin,Chenggang Xu,Fengyu Xie,Guangzhao Wang,Wenhan Guo
Improving the efficiency of the anodic oxygen evolution reaction (OER) is important to solve the global energy crisis and greenhouse gas emission problems. In this paper, a preparation method for a MIL-53(Fe)@ZIF-67(Co) composite electrode is proposed. The hierarchical structure formed by the combination of MIL-53(Fe) and ZIF-67(Co) provides a rich channel for the transport of electrons and mass in the OER process. XPS analysis and DFT calculations revealed that Fe electrons in MIL-53(Fe) were transferred to Co in ZIF-67(Co) through O, which confirmed the rapid charge transfer effect of this transport channel. The MIL-53(Fe)@ZIF-67(Co) electrode has significant OER performance. When the current density reaches 10 mA cm−2, the overpotential is only 193 mV. This study inaugurates a new way for the rational design of a multiphase interface and the construction of new MOF channel structures.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Gangsheng Zhang,Yi Wang,Meng Chen,Jixiang Xu,Lei Wang
In this work, a carbon-doped Co 3 S 4 /CoSO 4 /MnO catalyst (C@CoSOMn) was prepared in this work by using ZIF-67 as the template. The prepared catalyst was used to degrade levofloxacin (LEVO) by activating peroxymonosulfate (PMS). The optimized catalyst could degrade 97.73 % LEVO within 20 min with a rate constant of 0.294 min −1 . The combination of water-soluble CoSO 4 and Co 3 S 4 made more Co sites accessible to PMS for lasting decomposition to produce active species. Moreover, Mn species with low redox potential could promote the regeneration of Co 3+ and the activation of PMS. The doped carbon could facilitate the transfer of electron. Superoxide radicals (⋅O 2 − ), bulk and surface hydroxyl radicals (•OH), surface sulfate radicals (SO 4 •− ), and electron transfer process, especially the singlet oxygen ( 1 O 2 ) were involved in the LEVO degradation. This study sheds light on the synergism between the Co-based sulfide and the Mn oxide in the activation process of PMS, and might prompt the development of other ZIF-67-derived hybrid materials for environmental remediation.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 7
·18364-18379
·
IF 5.19
Zhang Xiao,Li Zhiyue,Zhang Taoyi,Chen Jing,Ji Wenxi,Wei Yun
A low-cost and environmental-friendly sodium alginate-melamine@zeolitic imidazolate framework-67 (SA-ME@ZIF-67) adsorbent was fabricated by chemical grafting and in situ growth for the removal of lead ions in wastewater. Firstly, melamine (ME) was grafted onto sodium alginate (SA) by amide reaction, and then SA-ME was dropped into a solution of calcium chloride to form hydrogel bead, and ZIF-67 was grown on the SA-ME hydrogel bead by the in situ growth method. The SA-ME@ZIF-67 adsorbent was characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The SA-ME@ZIF-67 adsorbent was used to effectively adsorb Pb(II) from aqueous solutions. The initial concentrations of lead ions, adsorbent dose, initial pH of lead ion solution, temperature, and adsorption time for the material were optimized. The adsorption isotherms and kinetics fitted to Langmuir isotherm model ( R 2 = 0.9281, 0.9420, and 0.9623 at the temperatures of 288.15 K, 298.15 K, and 308.15 K, respectively) and pseudo-second-order kinetic model ( R 2 = 0.9901) respectively. According to the Langmuir model at 308.15 K, the maximum adsorption capacity of the adsorbent for Pb(II) was 634.99 mg/g. The recycling application of the adsorbent was possible as it was easily collected and reused after five adsorption-regeneration cycles. In addition, the Pb(II) in real wastewater samples has been efficiently removed using the fabricated hydrogel. The results showed that the SA-ME@ZIF-67 adsorbent had high adsorption capacity, removal efficiency, and easy recyclability for Pb(II). Graphical abstract
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SOLAR ENERGY
·
2022
·
IF 7.188
Shuang'an Liu,Senyang Wang,Ying Cao,Chengyang Liang,Shitong Geng,Haipeng Guo,Ying Liu,Wenming Zhang,Ling Li
The catalytic enhancement of counter electrode materials is of an essential move for the overall evolution of QDSSCs. While the commonly used Cu 2 S/Cu counter electrode is easy to be eroded off by sulfur electrolyte, resulting in photoanode pollution. Herein, rough polyhedron Cu/Co@NCF composite is smoothly prepared via hydrothermal and synchronous doping method to replace Cu 2 S/Cu application. With the ZIF-67 as carbon source and morphology support, Cu and Co nanoparticles (NPs) are uniformly embedded in the carbon polyhedron without agglomeration, while the doping of nitrogen makes the composites have better porous structure. Combining the superior catalytic from Cu and Co particles with the electrical conductivity and stability from the carbon frame, the Cu/Co@NCF composite as QDSSCs counter electrode achieves an excellent photoelectric conversion effect (6.66%), close to that of Cu 2 S/Cu (7.29%). With stable and excellent counter electrode performance, Cu/Co@NCF composite unquestionably has the potential to be an alternative material for the CE application of QDSSCs.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Zhaowen Wang,Han Zhang,Haiyan Song,Xuefeng Bai
Development of a material with high adsorption capacity and selectivity for removal of strontium ion (Sr 2+ ) from nuclear wastewater is a challenge. Herein, dodecahedral zeolitic imidazolate frameworks-67 (ZIF-67) was successfully modified by potassium hexacyanoferrate(Ⅱ) (K 4 Fe(CN) 6 ) nanoparticles , and used as an effective adsorbent for Sr 2+ removal from model wastewater. In construction of adsorbent, methanol was used as the medium for assembly of ultra-fine and uniform 25 nm of K 4 Fe(CN) 6 nanoparticles on ZIF-67, well maintaining the original dodecahedral morphology and mesoporous structure of ZIF-67 crystal. N in 2-methylimidazole (2-MI) bonded with Co to generate ZIF-67, while the unsaturated Co in ZIF-67 bonded with N in K 4 Fe(CN) 6 to form spherical nanoparticles. Specific surface area of ZIF-67 were regulated by K 4 Fe(CN) 6 to an appropriate value of 607.464 m 2 ·g −1 for Sr 2+ adsorption. Adsorption efficiency of K 4 Fe(CN) 6 modified ZIF-67 for Sr 2+ was significantly enhanced to 90 % within 2 h at ambient conditions, due to the improvement in morphology, structure and chemical property of adsorbent. K 4 Fe(CN) 6 modified ZIF-67 exhibited high adsorption selectivity 45 mg·g −1 for Sr 2+ in the presence of competing metal ions such as K + , Na + , Mg 2+ and Ca 2+ , and thus achieved 40 mg·g −1 of adsorption capacity for Sr 2+ in actual tap water. Adsorption kinetics and isotherms were well fitted with the second-order kinetics and the Langmuir model, respectively, suggesting a chemisorption process. Mechanism studies showed that the surface of ZIF-67 was uniformly covered by ultra-fine nanoparticles, on the outer layer of which K + ions were distributed as the adsorption sites for ion exchange with Sr 2+ .
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APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shifeng Tan,Meiling Fan,Wenmao Tu,Duxin Zhang,Qi Li,Ziyi Xu,Xiaoyu Yang,Hongfei Pan,Haining Zhang
Development of a simple method for synthesizing transition metal-based bifunctional catalysts is of great importance in the context of oxygen-involved electrochemical energy conversion and storage devices. In this effort, electrochemical catalysts consisting of amorphous cobalt and cobalt oxides on graphene oxide (GO) were fabricated using a solvothermal process followed by etching ZIF-67 with oxygen-rich functional groups on GO (≈ 29 at. %) in a weak reduction atmosphere at 400 ℃. During the calcination process forming the ZIF-67@GO-based materials, exposed cobalt metal centers are created by partial vaporization and oxidation of ZIF-67. Also, metal ions are reduced to form Co and partially combine with oxygen from GO to generate amorphous Co 3 O 4 . Moreover, the porous framework structure of ZIF is retained under the mild calcination temperatures used. Benefiting from their porous framework and heteroatoms-doped composition, the ZIF-67@GO-based materials have low overpotentials of 319 mV at 10 mA cm −2 and high catalytic activities toward the oxygen evolution and oxygen reduction reactions in an alkaline electrolyte. In addition, the liquid zinc-air battery assembled with the ZIF-67@GO composite produced at a calcination temperature of 400 ℃ displays a high performance. Overall, the results demonstrate that the ZIF-67@GO composites have the potential to be high-performing catalysts in energy conversion devices. The readily controllable and high-yielding calcination method in this study is expected to serve as a model for new strategies to synthesize low-cost and efficient bifunctional electrocatalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Likang Fu,Chenxia Kang,Wenqi Xiong,Pengfu Tian,Shiyue Cao,Shuyun Wan,Hongyi Chen,Chengbao Zhou,Qiming Liu
Devising novel composite electrodes with particular structural/electrochemical characteristics becomes an efficient strategy to advance the performance of rechargeable battery. Herein, considering the homogeneous transition metal sulfide with N-doped carbon derived from zeolitic imidazolate framework-67 (ZIF-67) and WS 2 with large interlayer spacing, a laurel-leaf-like Co 9 S 8 /WS 2 @N-doped carbon bimetallic sulfide (Co 9 S 8 /WS 2 @NC) is engineered and prepared via a step-by-step method. As an electrode material for sodium ion batteries (SIBs), Co 9 S 8 /WS 2 @NC composite delivers high capacities of 480 and 405 mA h g −1 at 0.1 and 1.0 A g −1 , respectively. As the current density increases from 0.1 to 5.0 A g −1 , it provides specific capacity of 359 mA h g −1 with a capacity retention rate of 78.0%, which is higher than that of Co 9 S 8 @NC (63.5%) and WS 2 (58.6%). The Co 9 S 8 /WS 2 @NC composite anode maintains a stable specific capacity (354 mA h g −1 at 2.0 A g −1 ). It also exhibits a high capacitive contribution ratio of 90.8% at 1.0 mV s −1 . This study provides a new and reliable insight for designing bimetallic sulfide with two-dimensional nanostructure for energy storage.
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DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 25
·8927-8937
·
IF 4.39
Ying Liu,Na Wang,Zhongqiao Sun,Yide Han,Junli Xu,Yan Xu,Junbiao Wu,Hao Meng,Xia Zhang
MOF/polymer hybrid membranes integrate the surface activity of MOFs and the advantages of PVDF membranes, and can be used as adsorption membranes in the efficient removal of target organics. In this work, a new hybrid membrane of ZIF-67/PVDF with varying ZIF-67 dosages has been fabricated through a facile mechanical blending followed by a lyotropic phase transition. Methods including field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), FT-IR analyses and surface hydrophobicity/hydrophilicity measurements are applied to characterize the structure, physicochemical properties and membrane performances. Two synthetic triarylmethane dyes, cationic malachite green (MG) and anionic fuchsin acid (FA), are chosen as the main adsorption targets to evaluate the adsorption capacities of the resulting ZIF-67/PVDF hybrid membranes. Interestingly, all of the ZIF-67/PVDF hybrid membranes exhibit distinctly favorable efficiencies and selectivities toward MG and FA compared to pristine PVDF, which proves the positive roles of ZIF-67 in the adsorption ability of the hybrid membranes. The adsorption conditions are optimized and the adsorption kinetics and thermodynamics are analysed to study the adsorption mechanism. The reusability and the structural stability of the hybrid membranes undergoing cyclic adsorption processes are also discussed. To the best of our knowledge, this is the first time that good adsorption capacities for MG and FA for these MOF/PVDF membranes have been reported. This work highlights the prospective applications of MOF/PVDF hybrid membranes in the rapid and effective removal of target organics in the treatment of waste water.
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NANOTECHNOLOGY
·
2020
·Vol. 32
·期 8
·085501
·
IF 3.551
Feng Gao,Jin Zou,Wei Zhong,Xiaolong Tu,Xigen Huang,Yongfang Yu,Xiaoqiang Wang,Limin Lu,Ling Bai
In this study, the composite of Prussian blue-carboxylated MWCNTs/ZIF-67 (PB-MWCNTs-COOH/ZIF-67) was synthesized and used as modified electrode material to fabricate an electrochemical sensor for the determination of paracetamol (PAR). In this sensor system, negatively charged MWCNTs-COOH as support for the immobilization of positively charged PB can effectively avoid the agglomeration of PB and enhance the stability, conductivity and catalytic activity of the composite. ZIF-67 particles coating outside PB-MWCNTs-COOH promotes the concentration of PAR. Benefiting from the synergistic effect, the PB-MWCNTs-COOH/ZIF-67 based sensor exhibits significantly improved electrochemical sensing behavior toward the oxidation of PAR. Under the optimum conditions, the PAR sensor presents wide linear ranges of 0.01–70 μM with a low limit of detection of 3.3 nM (S/N = 3). The method also possesses long-term stability, good reproducibility and selectivity, and was employed to the determination of PAR contents in PAR tablets sample.
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危险品化学品经营许可证（带存储）