APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Miao Wang,Yu Feng,Yan Zhang,Shanshan Li,Mengmeng Wu,Langlang Xue,Jiahui Zhao,Wei Zhang,Mingzheng Ge,Yuekun Lai,Jie Mi
Ni-Co layered double hydroxides (LDHs) have been extensively applied as promising supercapacitor materials due to their ultra-high theoretical capacitance and excellent redox activity. Herein, three-dimensional hollow Ni-Co LDH with staggered nanosheets as the shell was synthesized from ZIF-67 template via the microwave treatment. The Ni-Co LDH revealed a high specific capacitance (2369.0F/g at 0.5 A/g) and a satisfactory rate capability when used as the electrode materials, which could be attributed to its high specific surface area, more exposed active sites, and the synergistic effects between nickel and cobalt ions for promoting mass transfer. Moreover, the asymmetric supercapacitor device possessed the energy density and power density as high as 21.28 Wh/kg and 3741.0 W/kg, respectively. Meanwhile, the Ni-Co LDH//AC device delivered excellent cycling stability with 83.6% capacitance retention after 10,000 cycles. This strategy is promising to be applied in other devices for energy storage, such as Li/Na/K-ion batteries, fuel cells, solar cells, etc.
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高影响因子
Small
·
2020
·Vol. 16
·期 11
·1907141
·
IF 11.459
Chengzhan Yan,Huaping Zhao,Jun Li,Huile Jin,Long Liu,Wanyi Wu,Jichang Wang,Yong Lei,Shun Wang
The high theoretical capacity of red phosphorus (RP) makes it a promising anode material for lithium-ion batteries. However, the large volume change of RP during charging/discharging imposes an adverse effect on the cyclability and the rate performance suffers from its low conductivity. Herein, a facile solution-based strategy is exploited to incorporate phosphorus into the pores of zeolitic imidazole framework (ZIF-8) derived carbon hosts under a mild temperature. With this method, the blocky RP is etched into the form of polyphosphides anions (PP, mainly P 5 − ) so that it can easily diffuse into the pores of porous carbon hosts. Especially, the indelible crystalline surface phosphorus can be effectively avoided, which usually generates in the conventional vapor-condensation encapsulation method. Moreover, highly-conductive ZIF-8 derived carbon hosts with any pore smaller than 3 nm are efficient for loading PP and these pores can alleviate the volume change well. Finally, the composite of phosphorus encapsulated into ZIF-8 derived porous carbon exhibits a significantly improved electrochemical performance as lithium-ion battery anode with a high capacity of 786 mAh g −1 after 100 cycles at 0.1 A g −1 , a good stability within 700 cycles at 1 A g −1 , and an excellent rate performance.
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高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 21
·3213-3224
·
IF 8.683
Wenfang Miao,Feirong Huang,Xiaochen Shen,Shaopeng Li,Xingru Cao,Xuefeng Zhang,Jieyi Yu,Xinglong Dong
The development of high-efficiency, stable, and low-cost Fe–N–C electrocatalysts for the oxygen reduction reaction (ORR) has attracted considerable attention. Herein, a stable atomically dispersed Fe–Nx-based catalyst was synthesized from a hierarchical structure involving carbon nanofiber (CNF)-supported zeolitic-imidazolate-framework-8 (ZIF-8) encapsulated Fe–Phen complex ((Fe,N)-ZIF-8/CNFs). The Fe–Nx–CNFs obtained from the pyrolysis of (Fe,N)-ZIF-8/CNFs showed a good hierarchical multi-layer structure. The natural network structure of the carbon nanofibers serves as a matrix to uniformly distribute the ZIF-8 particles, and the Fe–Nx sites derived from the Fe–Phen complex were uniformly distributed in ZIF-8 particles. It exhibits excellent ORR performance with a high half-wave potential of 0.875 V (vs. RHE), which was 55 mV higher than that of the commercial Pt/C catalyst. In addition, density functional theory (DFT) calculations on the catalyst further revealed the origin of the ORR activity via a 4e− pathway from the precise local coordination of FeN4 sites.
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2024
·Vol. 416
·期 19
·4417-4426
·
IF 3.8
Zhu Zhentong,Wang Xiaoli,Wang Na,Zeng Chaoqin,Zhang Lei,Fan Jiamin,Yang Xin,Li Peizhe,Yuan Hongxia,Feng Yanjun,Huo Shuhui,Lu Xiaoquan
Artificial enzymes with high stability, adjustable catalytic activity, controllable preparation, and good reproducibility have been widely studied. Noble metal nanozymes, particularly gold nanoparticles (Au NPs), exhibit good catalytic activity, but their stability is poor. In this study, zeolitic imidazolate framework-8 (ZIF-8) was used as a carrier for Au NPs, thus improving the utilization efficiency and conservation stability of the nanozymes. A ZIF-8/Au nanocomposite with peroxidase activity and a raspberry-shaped structure was synthesized. In the assay, ZIF-8/Au catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to a blue product oxidized TMB (oxTMB). Glutathione (GSH) selectively inhibited this reaction, with a detection limit of 0.28 µM and linear range of 0.5–60 µM. Using the photo and chromaticity analysis functions, we developed a portable analysis method using a smartphone equipped with a camera module as a detection terminal for a wide range of rapid screening techniques for GSH. Preparation of raspberry-shaped ZIF-8/Au improved the catalytic activity of Au NPs and good results were demonstrated in serum, which suggests their promising application under physiological conditions. Graphical Abstract
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Hanchen Ye,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
The discharge of large amounts of sewage has caused enormous damage to the environment and human health. There is an urgent need for efficient and environmentally friendly materials to deal with such troubles. Materials with emulsion separation have attracted everyone’s attention. In this study, zeolitic imidazolate framework (ZIF)-8- and Co-polydimethylsiloxane (PDMS)-modified multiwalled carbon nanotube films were fabricated. First, the surface of the nanotube films was modified with ZIF-8 by in situ growth, and then a Co-PDMS layer was added by dip coating. The membrane has excellent wettability, and it is superhydrophobic and superoleophilic in air. The separation efficiency of water-in-oil emulsions reaches more than 99.9%, and it has an outstanding separation ability for corrosive emulsions. Moreover, the membrane has an excellent self-healing ability, and it can rapidly heal at normal temperature after being damaged. This makes the film more suitable for practical oily wastewater treatment. We performed related research and propose a possible self-healing mechanism.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
·
IF 7.489
Long Zhou,Na Li,Xiaoying Jin,Gary Owens,Zuliang Chen
A n Fe@ZIF-8 composite, which combined the tailorable porosity of ZIF-8 with the versatile functionality of Fe nanoparticles ( n Fe), was synthesized for Pb(II) removal. Batch adsorption experiments showed that more than 95.3% of Pb(II) was removed from aqueous solution at an initial concentration of 50 mg L −1 when using n Fe@ZIF-8 within 60 min at pH value of 5. The mechanism of Pb(II) removal was studied via characterization of changes the morphology, size and composition of in n Fe@ZIF-8 before and after exposure the solutions containing Pb(II). Specifically, Fourier transform infrared (FTIR) and X-ray powder diffraction (XRD) indicated that n Fe@ZIF-8 was successfully synthesized and also remained stable after Pb(II) removal. Transmission Electron Microscope (TEM) and Scanning electron microscopy-X-ray energy dispersive spectrometer (SEM-EDS) both confirmed that Pb(II) was partially adhered onto the surface of n Fe@ZIF-8, where X-ray photoelectron spectroscopy (XPS) specifically revealed the existence of Pb(0) on the surface. This indicated that Pb(II) was initially adsorbed onto the surface of n Fe@ZIF-8 and subsequently reduced to Pb(0). Moreover, Pb(II) removal fit well to kinetics of absorption and reduction. Finally, in practice, n Fe@ZIF-8 could remove 96.3% of Pb(II) from an electroplating wastewater.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Song Duan,Baojie Dou,Xiuzhou Lin,Shixiong Zhao,Wilfred Emori,Jilin Pan,Hao Hu,Hang Xiao
In this study, uniform sized ZIF-8 was synthesized by microemulsion method, and a series of ZIF-8 modified epoxy coatings with different mass fractions were successfully prepared. EIS analysis revealed the improved anti-corrosion performance of the modified epoxy coating with increasing mass fraction of ZIF-8 fillers, and this was confirmed by the results of the salt spray and adhesion tests . In addition, the tensile strength and friction properties of the epoxy coating have also been greatly improved. These phenomena were explained by the chemical cross-linking between ZIF-8 fillers and epoxy. The chemical cross-linking increased both the cross-linking density and the barrier performance of the epoxy coating, consequently improving its anti-corrosion and mechanical properties.
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高影响因子
LANGMUIR
·
2023
·
IF 3.9
Qiufen Liu,Xuelei Chen,Jiahao Wu,Liming Zhang,Guanjie He,Shouqin Tian,Xiujian Zhao
Metal–organic frameworks (MOFs) constructed by metal ions/clusters and organic linkers are used to encapsulate fluorescent guest species with aggregation-caused quenching (ACQ) effects to enhance fluorescence properties due to their porous structures and high specific surface areas. However, there would be a problem of matching between MOF pores and guest molecules’ sizes. In this paper, amorphous ZIF-8 was modified by carboxyl functional groups (H3BTC-ZIF-8) via introducing the 1,2,4-benzenetricarbonic acid (H3BTC) ligand into the ZIF-8 sol system. Moreover, H3BTC-ZIF-8 was used for the loading of organic fluorescent dyes rhodamine 6G (R6G) and coumarin 151 (C151) to prepare R6G/C151/H3BTC-ZIF-8 composite films. A white-light-emitting composite film (R6G/C151/H3BTC-ZIF-8) with CIE coordinates of (0.323, 0.347) was successfully prepared by compounding fluorescent dyes (R6G and C151) with H3BTC-modified ZIF-8, whose photoluminescence quantum yield (PLQY) can reach 64.0%. It was higher than the PLQY of the composite films prepared by crystalline ZIF-8 (40.2%) or amorphous ZIF-8 without H3BTC (48.0%) compounded with the same concentrations of dyes. The fluorescence enhancement was probably attributed to an increased amount of active sites of H3BTC-modified ZIF-8 interacting with dyes C151 and R6G. This can form hydrogen bonds between H3BTC-ZIF-8 and C151, and weak electron donor–acceptor (D–A) interactions between H3BTC-ZIF-8 and R6G molecules, respectively, thus enhancing the interactions between dyes and ZIF-8 and reducing the ACQ effect existing between dye molecules. Therefore, this strategy could provide an important guidance to develop white-light-emissive materials.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jianxin Liu,Rui Li,Xiang Zu,Xiaochao Zhang,Yunfang Wang,Yawen Wang,Caimei Fan
Photocatalysis can produce NH 3 using N 2 and H 2 O at room temperature and atmospheric pressure, which has been considering as a safe, clean, and sustainable NH 3 synthesis. However, the poor solubility and slow diffusion rate of N 2 in water severely limited the nitrogen activation efficiency. Herein, we solve this problem by developing a hydrophilic-hydrophobic structure photocatalyst with gas-liquid-solid triphase reaction interface, where hydrophilic Bi 4 O 5 Br 2 is deposited on the surface of hydrophobic ZIF-8 to form a novel Bi 4 O 5 Br 2 /ZIF-8 composite photocatalyst. Such triphase interface architecture allows the direct delivery of N 2 from gas phase to the photocatalytic reaction interface replaced the diffusion of N 2 through the liquid phase. This rapid supply of N 2 can efficiently capture photoinduced electrons, thereby promoting the utilization efficiency of photo-induced electrons and the nitrogen fixation activation. This novel Bi 4 O 5 Br 2 /ZIF-8(30%) composite photocatalyst with good triphase contact performance shows obviously improved photocatalytic nitrogen fixation activity 327.338 μmol·L −1 ·h −1 ·g −1 (3.6 times than that of Bi 4 O 5 Br 2 ). Furthermore, efficient molecular nitrogen activation by Bi 4 O 5 Br 2 /ZIF-8 further brings out an attractive potential to improve other gas-consumption reactions, such as CO 2 reduction, according to this concept of triphase direct contact.
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高影响因子
MATERIALS & DESIGN
·
2019
·
IF 5.77
Lulu Xu,Ye Xiong,Baokang Dang,Zhangning Ye,Chunde Jin,Qingfeng Sun,Xiaohong Yu
Lightweight aerogels with superior cavities have attracted great interest in the field of electromagnetic wave absorbing materials. In this work, a hierarchical porous wood aerogel modified with Fe 3 O 4 /ZIF-67 (Fe 3 O 4 /ZIF-67@WA) with high compressibility and low-density was fabricated by in-situ anchoring of magnetic Fe 3 O 4 /ZIF-67 rhombohedral dodecahedron in naturally delignified wood aerogel. Combining the advantages of both aerogels and magnetic Fe 3 O 4 /ZIF-67 particles, Fe 3 O 4 /ZIF-67@WA reveals excellent compression-resilience and efficient microwave absorption performance. It possesses a maximum reflection loss (RL) of about −23.4 dB at a low thickness of 1.5 mm and a specific electromagnetic shielding effectiveness of up to ~156.3 dB cm 3 g −1 . Moreover, the composites exhibit a broad absorption bandwidth under an ultrahigh frequency of 13.5–18.0 GHz. In view of those excellent absorbing effects, the prepared green magnetic Fe 3 O 4 /ZIF-67@WA is likely to be used as a lightweight shielding material against electromagnetic radiation, especially for smart building and miniaturized device applications.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Haimin Liu,Mengmeng Jin,Da Zhan,Jinming Wang,Xiaoyi Cai,Yongting Qiu,Linfei Lai
Structure modulation of transition metal phosphides at the atomic scale can significantly modify their catalytic properties. Herein, stacking faults abundant Ni 2 P/Co 2 P electrocatalysts with outstanding bifunctional oxygen evolution and hydrogen evolution property have been prepared. The stacking faults are formed by slow dissolution of Ni substrate by Mo 6+ and further redeposition of Ni 2+ during the growth of Co(OH)F crystals. Unprecedentedly, the distinct mechanistic etching-redeposition pathway dictated by the stacking faults, heterostructures and crystal lattice deformation leads to lattice expansion of Co 2 P and enables preferred reactants adsorption. Electrolysis cell employing Ni 2 P/Co 2 P electrocatalysts as a bifunctional catalyst for both the cathode and the anode delivers a current density of 10 mA cm −2 at a cell voltage of 1.57 V, which is comparable to the integrated Pt/C and IrO 2 counterparts. The exceptional electrocatalytic performance of Co 2 P/Ni 2 P-x%Mo indicates the redeposition mechanism a new methodology to modulate the structure and surface reactivity of electrocatalysts.
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高影响因子
Journal of Water Process Engineering
·
2022
·
IF 7.34
Qiushi Jiang,Zhaolian Han,Yinjie Qian,Yafeng Yuan,Yating Ren,Mingyu Wang,Zhiqiang Cheng
A novel strategy for the preparation of heterojunction derivants by regulating the loading of precursors was proposed and applied for the first time to effectively remove dyes and antibiotics. Zeolite imidazole framework-8 (ZIF-8)-derived ZnO/TiO 2 nano-burst-tube (NBT) was prepared by calcination of ZIF-8 as precursor grown in a solvothermal system adjusted by NH 4 OH or NaOH , TiO 2 NBT as solvothermal substrate. Through a reasonable selection of solvothermal system, ZIF-8-derived ZnO/TiO 2 NBT not only provides enhanced specific surface area (1012.3 m 2 /g), but also enhances the visible light response and charge separation of TiO 2 NBT, whose instantaneous photocurrent density is up to 53 mA cm −2 , which is three times that of TiO 2 NBT. Under visible light irradiation, ZnO/TiO 2 NBT achieved rapid degradation of Rhodamine B(RhB), tetracycline hydrochloride (TCH) and chlortetracycline hydrochloride (CTC) with complete removal within 20 min, outperforming ZnO, ZIF-8, TiO 2 NBT and ZIF-8/TiO 2 NBT, with excellent cyclic photocatalytic performance. The results show that the degradation pathways of RhB, TCH and CTC are different. The work provides a promising strategy for multifunctional derivative photocatalytic materials preparation.
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高影响因子
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