Nanomaterials
·
2022
·Vol. 12
·期 15
·2579
·
IF 5.719
Beiying Qi,Xinchang Wang,Xinyue Wang,Jipeng Cheng,Yuanyuan Shang
Metal–organic framework (MOF)-derived pure ZnO and Cu-doped ZnO nanocages were fabricated by calcining a zeolitic imidazole framework (ZIF-8) and Cu-doped ZIF-8. The morphology and crystal structure of the samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and high-resolution transmission electron microscopy (HRTEM). It was found that Cu doping did not change the crystal structures and morphologies of MOF-derived ZnO nanocages. The H2S-sensing properties of the sensors based on ZnO and Cu-doped ZnO nanocages were investigated. The results indicated that the H2S-sensing properties of MOF-derived ZnO nanocages were effectively improved by Cu doping, and the optimal doping content was 3 at%. Moreover, 3 at% Cu-doped ZnO nanocages showed the highest response of 4733 for 5 ppm H2S at 200 °C, and the detection limit could be as low as 20 ppb. The gas-sensing mechanism was also discussed.Keywords:MOF-derived ZnO;nanocages;Cu doping;H2S sensing
研究领域:
材料科学
·
传感器技术
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DOI
PubMed
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Tian-Tian Chen,Rui Wang,Lin-Ke Li,Zhong-Jun Li,Shuang-Quan Zang
Metal–organic framework (MOF) derived hybrid materials have been developed as an efficient non-noble-metal electrocatalysts for clean energy conversion systems. In this work, a Co-based MOF containing nitrogen and oxygen heteroatoms (Co-NOMOF) mixed with the thiomolybdate [Mo 3 S 13 ] 2− nanoclusters was used to prepare the N, S, O-doped carbon encapsulating Co 9 S 8 and MoS 2 (Co 9 S 8 /MoS 2 @NSOC) nanocomposite by one-step pyrolysis . The Co 9 S 8 /MoS 2 @NSOC nanocomposite exhibited remarkable catalytic performance for hydrogen evolution reaction (HER) with overpotential of 194 and 233 mV in 1 M KOH and 0.5 M H 2 SO 4 solution under 10 mA cm −2 , respectively, which was ascribed to the multiheteroatom-doped hierarchical porous carbon matrix and the synergistic effect of intrinsic activity of Co 9 S 8 and MoS 2 . This work provides new opportunity for developing highly efficient non-precious metal electrochemical catalysts.
研究领域:
材料科学
·
能源化学
·
电催化领域
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yanrui Hao,Hao Guo,Mingyue Wang,Liping Peng,Henglong Ren,Wu Yang
In this article, MOF-derived (NiCo)Se 2 -x-CeO 2 sphere-rod structure composite with mixed ligands (BPDC: biphenyl-4, 4′-dicarboxylic acid, PTA : terephthalic acid) is constructed via a two-step solvothermal technique. The carboxyl functional groups of BPDC act as nucleation modulation to inhibit transverse growth of MOF by enhancing steric hindrance , and two symmetric carboxyl groups and unsaturated metal nodes of adjacent layers generate the coordination, thus forming ordered nanostructures with relatively large aspect ratio. The structure produces larger pores to balance the opposite and different rate of diffusion for metal and nonmetallic ions in hydrothermal selenization. The construction of heterostructure by combining highly reactive (NiCo)Se 2 with low reactive CeO 2 improves diffusion kinetics. As-prepared (NiCo)Se 2 –3:7-CeO 2 derived from MOF-3:7-CeO 2 of largest aspect ratio generates large mesopore to achieve strong penetration of electrolyte ions and exhibits enhanced performance through synergistic interaction between all components on heterointerface. After testing, the (NiCo)Se 2 –3:7-CeO 2 (PTA:BPDC = 3:7) electrode shows superior specific capacitance of 2715 F g −1 (1222 mAh g −1 ) at 1 A g −1 . The assembled (NiCo)Se 2 –3:7-CeO 2 //AC HSC (hybrid supercapacitor) delivers energy density of 45.9 Wh kg −1 at power density of 747 W kg −1 .
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2018
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IF 6.14
Yanying Wang,Zhaoyi Zhang,Xin Liu,Fang Ding,Ping Zou,Xianxiang Wang,Qingbiao Zhao,Hanbing Rao
We developed a hydrothermal synthesis and high temperature calcination method to synthesize the metal–organic framework (MOF)-derived NiCo2O4/NiO and NiCo2O4/NiO-rGO. These composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunner–Emmet–Teller measurements. This work combines excellent catalytic efficiency of the transition metal with large specific surface area and large number of pores of the MOF. Consequently, catalysts for oxygen evolution with high efficiency and low cost were obtained. Both materials show lower overpotential at 430 and 350 mV, respectively, under 10 mA·cm–2. The Tafel slopes are 49 and 66 mV·dec–1, respectively, with very small performance attenuation for long-term catalytic reaction. Therefore, the catalysts reported herein possess great potential for application in oxygen evolution reaction.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yi Hou,Jixiang Wang,Baijun Chen,Hui Zhang,Zichen Xiang,Haikui Zhu,Lixi Wang
To meet the requirements of lightweight and wideband attenuation for advanced electromagnetic (EM) absorption materials, the combination of both MOF composition and hierarchical structural design was applied as the strategy to prepare the MOF-derived Co@SiC nanowire (Co@SiCnw) nanocomposite aerogel. The hierarchical and laminated structures with multiple Co@SiCnw layers were constructed via a mixed growth-assisted freeze-drying and calcination process. The ultralightweight Co@SiCnw presents a low density of 0.11 g/cm3. With abundant second-phase polarization interfaces and enlarged EM wave attenuation channels to enhance dielectric and conductive loss, the optimized Co@SiCnw offers a minimal reflection loss (RLmin) of −61.4 dB at 10.0 GHz (2.64 mm) and an effective absorption bandwidth (EAB) as wide as 7.44 GHz with a sample thickness of only 2.16 mm. Furthermore, multifunctionalities, including low density, thermal insulation, and self-standing, were demonstrated for Co@SiCnw, making it a high-performance and practical microwave absorption material.
研究领域:
材料科学
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电磁学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2024
·Vol. 41
·期 6
·1665-1678
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IF 2.9
Liu Yanyan,Wang Zhiheng,Li Xin,Gao Ruiyao,Sun Jiong,Liu Jiankun,Yao Songdong
To investigate the potential utilization of MOF templates in hydrodesulfurization (HDS) of large sulfur-containing compounds, MOF-derived Ni 2 P was prepared and characterized by XRD, TG, SEM, TEM, XPS and Raman. The findings indicate that MOF-derived Ni 2 P catalyst exhibits significantly enhanced Hydrodesulfurization (HDS) activity compared to conventional unsupported Ni 2 P. A modified pyrolysis and phosphiding condition allowed the stacking of central Ni atoms to be aggregated loosely, and morphology of MOF-derived Ni 2 P can be controllably transmitted from polyhedral to petal-like. A lower pyrolysis temperature tends to reduce density of Ni aggregates and cluster size of Ni 2 P(111), thereby facilitating the phosphiding of Ni aggregates and enhancing the catalytic activity of MOF-derived Ni 2 P in HDS process. Increasing the duration time of pyrolysis at lower temperatures does not accelerate the aggregation of particles, but makes petals on surface of MOF-derived Ni become thinner and eventually disappear, until coral-like nanosphere aggregates with uniform size are formed. The gradually elimination of MOF framework renders nickel aggregates more susceptible to phosphiding. The collapse of pore structure of MOF template can impact HDS activity of MOF-derived Ni 2 P. Prolonging pyrolysis time causes the spacing between Ni 2 P clusters to diminish, thereby significantly decreasing reactivity of Ni 2 P-400-4-275 compared to Ni 2 P-400-2-275 in DBT–HDS.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2020
·Vol. 44
·期 48
·21085-21091
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IF 3.288
Hongli Zhu,Jing Huang,Huijun Chen,Xiaomiao Feng
In recent years, self-propelled micromotors have attracted great attention due to their intelligent properties. To obtain a bubble-propelled micromotor, additional catalysts are required, which are usually expensive, toxic, and unstable, and lead to uncontrolled motion. To overcome these limits, ZIF-67, as a kind of MOF material, was chosen as a micromotor precursor; porous carbon decorated with magnetic Co nanocomposites (Co@PCs) could be obtained via an annealing process involving ZIF-67. These Co@PCs were used as micromotors for drug delivery, and were mass-producible, stable, and biocompatible. Due to the presence of magnetic Co, their motion could be controlled in a magnetic field. Co@PCs carbonized at 600 °C were self-propelled at a speed of 27.68 μm s−1, which corresponded to a relative speed of about 7.92 body-lengths s−1 at a fuel concentration of 5% with a lifetime of about 60 minutes. Furthermore, Co@PCs could be used as nanocarriers for the loading and release of the anticancer drug doxorubicin.
研究领域:
材料科学
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生物医学工程
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纳米技术
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DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaoxin Chen,Ruimeng Han,Zirui Guo,Haobo Ma,Xiaoyu Ji,Lei Wang,Jianwei Meng,Yanyan Fang,Kyongjin Pang,Shan Peng
Metal organic framework (MOF)-derivatives have a larger specific surface area, higher porosity, tunable pore size, higher conductivity, good stability, more exposed active species, etc., but few literature are reported about their application potential in micropollutant separation and removal. In view of this, a robust MOF derivative-based photocatalytic superhydrophobic membrane (D6/TiO2/MoS2/NiCo-NC/PVDF) was successfully fabricated for the first time through solvothermal synthesis and chemical modification, combined with a negative pressure-assisted loading approach. (1) The MoS2-doping strategy effectively avoided the collapse and coarsening of cauliflower-like MOFs during the calcination phase and simultaneously ensured the uniform distribution of metal particles in MOF-derived carbons. (2) The synergistic catalysis of the NiCo-MOF derivative, MoS2, and TiO2 enhanced the transfer efficiency of electrons and free radicals, achieving efficient in situ degradation of pesticides and pharmaceutical and personal care products. (3) The introduction of sodium alginate greatly improved the adhesion between the coating and polyvinylidene fluoride (PVDF) membrane and simultaneously enhanced the growth of MOFs through complexation. (4) The cauliflower-like MOF-derived carbon skeleton with higher surface areas and micronanoporosity combined with a heterogeneous MoS2 structure provided a large specific surface area and enough adsorption sites for various pollutants. High thermal calcination treatment greatly enhanced MOF growth rate, thus resulting in a flaky structure with high regularity and a large specific area. (5) The ultralow surface energy of interlaced siloxane molecules endowed the hybrid membrane with robust superhydrophobicity and superoleophilicity, always maintaining superhydrophobicity after long-time photodegradation. The final membrane achieved continuous emulsion separation and a photocatalytic self-cleaning property. The separation efficiency of the hybrid membrane for emulsions was still up to 97% after reuse for 120 cycles, and it could degrade 86.5% PRO, 90.1% ACE, 92.1% ASP, and 94.3% SMZ, respectively, with the initial concentration of 10 mg/L. The driving forces for oil–water separation and decontamination of the D6/TiO2/MoS2/NiCo-NC/PVDF membrane mainly involved the grasping forces of dodecamethylcyclohexasiloxane, capillary force of inner pores, electrostatic interaction, hydrogen bond interaction, partial p-π conjugation, van der Waals force, and lipophilicity.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Fang Wang,Ting Feng,Xiujuan Jin,Yulin Zhou,Yanjie Xu,Yahui Gao,Haisheng Li,Jianfei Lei
Herein, a robust MOFs-derived super-carbon embedding with single atom Co/Ni anode materials for LIBs is developed by one-step annealing of the core–shell precursor ZIF-8@ZIF-67 with the introduction of dimethylglyoxime nickel as Ni source. The characterization results clearly indicate that atomic Co/Ni active sites accompanied with suitable CoNi nanoparticles are evenly embedded in the MOF-derived hollow rich-nitrogen carbon matrix. Simultaneously, moderate short carbon nanotubes root in polyhedral surface under the catalytic effect from the CoNi nanoparticles and construct an advanced conductive network. As a result, it delivers a high reversible lithium-ion storage capacity of 462.1 mAh g −1 at a current density of 0.5 A g −1 over 500 cycles, excellent rate performance of 223.28 mAh g −1 even at a high current density of 2 A g −1 , which is much higher than most of reported carbon-based electrode materials. The enhanced lithium storage performance mainly derives from the moderate affinity of the Li by the atomic Co/Ni active sites incorporated with their powerful catalytic effect assisting MOF-derived rich-N doped carbon base. Moreover, the superior nano-structure of the hollow rich-nitrogen carbon skeleton with in-situ grown short carbon nanotubes improves the conductivity of electrode materials, relieves the volume expansion and accelerates the migration rate of lithium ions and electrons. The theoretical calculation further confirms the superior affinity of the Li on atomic Co/Ni active sties.
研究领域:
材料科学
·
能源存储
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Qingqing Hou,Xiyi Li,Yunhong Pi,Jing Xiao
Photocatalytic conversion of CO2 into fuel and value-added chemicals as a promising method has been applied recently to ease energy- or environment-related crises. Herein, we construct an In2S3@NH2-MIL-68(In)@In2S3 (denoted as SMS(In)) sandwich homologous heterojunction via a controllable in situ metal–organic frameworks (MOF) sulfuration process. The improved photoreduction activity mainly lies in the effective charge transfer and separation through a homogeneous interface, enhanced CO2 adsorption and mass transfer, and plentiful reactive sites. Benefiting from this unique hollow homologous heterojunction, SMS(In)-7 obtains a CO generation rate as high as 11.23 μmol g–1 h–1 with visible-light irradiation, nearly 3 times enhancement over that of pure MOF-derived In2S3. This work provides a novel insight into the utilization of MOF-based platform for an efficient atomically heterojunction design.
研究领域:
材料科学
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环境科学
·
化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yuan Wang,Zhaoxian Yang,Lei Liu,Yingbo Chen
In this study, hydrophobic nanofillers (ODA-h-NCs) were firstly synthesized through surface modification of MOF-derived nanocages by octadecylamine (ODA). ODA-h-NCs were then incorporated into poly(piperazine-amide) (PA) active layer to fabricate thin-film nanocomposite (TFN) nanofiltration membranes. The effects of ODA-h-NCs dosage on PA’s properties were characterized and the membrane performances on salt rejections were evaluated. Finally, the TFN nanofiltration membrane with the optimal nanoparticle doping amount was chosen. The experimental results show that the water permeance of the constructed TFN nanofiltration membrane reaches 8.97 L/(m 2 ·h·bar) with 95.8% Na 2 SO 4 rejection when ODA-h-NCs concentration is 0.0075 wt%, which is 1.7 times that of pristine membrane. It is also testified that the prepared TFN nanofiltration membrane possesses good stability through 50-h filtration test. Although the introduction of hydrophobic ODA-h-NCs increases the PA layer thickness, ODA-h-NCs decrease the crosslinking degree of PA layer by inhibiting the piperazine diffusion rate and pathway, their unique porous nanocage structure and large surface area provide additional transport path for water molecules, which equips TFN nanofiltration membrane with higher water flux.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yang Zhan,Shun-zhi Yu,Shao-hua Luo,Jian Feng,Qing Wang
Transition-metal sulfides (TMS) are one of the most promising cathode catalysts for Li–O2 batteries (LOBs) owing to their excellent stabilities and inherent metallicity. In this work, a highly efficient mode has been used to synthesize Co@CNTs [pyrolysis products of metal–organic frameworks (MOFs)]-derived CoS2(CoS)@NC. Benefiting from the special yolk–shell hierarchical porous morphology, the existence of Co–N bonds, and dual-function catalytic activity (ORR/OER) of the open metal sites contributed by MOFs, the CoS2@NC-400/AB electrode illustrated excellent charge–discharge cycling for up to nearly 100 times at a current density of 0.1 mA cm–2 under a limited capacity of 500 mA h g–1 (based on the total weight of CoS2@NC and AB) with a high discharge voltage plateau and a low charge cut-off voltage. Meanwhile, the average transferred electron number (n) is around 3.7 per O2 molecule for CoS2@NC-400, which is the chief approach for a four-electron pathway of the ORR under alkaline media. Therefore, we believe that the novel CoS2@NC-400/AB electrode could serve as an excellent catalyst in the LOBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
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