INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Youwei Cheng,Lian Zhu,Yaqiong Gong
Metal-organic frameworks (MOFs) are widely recognized as precursors or sacrificial templates for the synthesis of target catalysts on account of their high porosity and high active surface area . Elemental doping strategy is considered as an effective method for the synthesis of efficient and stable catalysts for electrolytic water. Therefore, in this paper, Ce-doped Ni(OH) 2 nanoparticles and Ni-MOF nanosheets composites were synthesized by electrodeposition using Ni-MOF as precursor. Catalyst Ce–Ni(OH) 2 @Ni-MOF/NF displays excellent OER performance, requiring only 193 mV and 279 mV overpotentials to realize current densities of 10 mA cm −2 and 100 mA cm −2 , respectively, while the UOR performance was very remarkable, only a potential of 1.28 V was demanded to reach a current density of 10 mA cm −2 . In addition, no obvious change in the overpotential was noticed during the stability test of 16 h, indicating good stability of Ce–Ni(OH) 2 @Ni-MOF/NF. This study provides a meaningful reference for the design of an efficient and stable environmental friendly electrocatalyst .
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
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lin Zhang,Chengfang Qiao,Xiangyang Cai,Zhengqiang Xia,Jing Han,Qi Yang,Chunsheng Zhou,Sanping Chen,Shengli Gao
Optimizing the microenvironment of MOF pore is an effective strategy to improve the sensitivity of MOF-based electrochemical biosensors. In this work, a series of isomorphic 3D chiral Ni-MOFs with different pore sizes were prepared and used to construct acetylcholinesterase (AChE) biosensors for the electrochemical detection of chiral drug inhibitor galantamine hydrobromide (GH). The combination of the dense metal nodes with intrinsic oxidase-like activity and the high active AChE, creates synergistic catalysis hydrolysis of acetylthiocholine chloride (ATCl) to produce fast sensing response. The more matched size and chirality of MOF pore significantly enhance the host–guest interactions between the substrate and biosensor, which allows the optimum AChE/ L-Ni-BPY /DpAu/GCE platform to exhibit highly sensitive detection of GH, with a lowest detection limit of 0.31 pM and a wide linear range of 1 × 10 −12 ~ 1 × 10 −6 M among the reported pharmaceutical AChE inhibitor sensing systems. Such matching effect is identified and quantified with accurate apparent energy through the detailed microcalorimetry investigations, which well illustrates the structure–activity relationship of the as-synthesized biosensors. The thermodynamically-guided assembling strategy provides new insights into the development of practical MOF-based electrochemical sensors.
研究领域:
生物传感技术
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药物分析
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材料科学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2020
·Vol. 412
·期 4
·849-860
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IF 3.637
Huang Xiaozhou,Huang Dihui,Chen JinYang,Ye Ruihong,Lin Qian,Chen Sheng
In this paper, a novel bimetallic Ce-Ni metal-organic frameworks (Ce-Ni-MOF) are synthesized by hydrothermal reaction, using 1,3,5-benzenetricarboxylic acid as a ligand. In particular, the bimetallic Ce-Ni-MOF with the largest specific surface area and catalytic sites was synthesized when the molar ratio of Ce 3+ to Ni 2+ was 3:7. Bimetallic Ce-Ni-MOF is added to the traditional conductive material of multiwall carbon nanotubes (MWCNTs) to play their synergistic effect, improve the conductivity, specific surface area, and catalytic site of the MWCNTs. A novel bisphenol A (BPA) sensor was successfully prepared by a self-assembled multilayer strategy of Ce-Ni-MOF/MWCNTs modified glassy carbon electrodes (GCE). Field emission scanning electron microscopy, powder X-ray diffraction, and transmission electron microscope were carried out to characterize the Ce-Ni-MOF/MWCNTs. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used as a sensitive analytical method for the determination of BPA, and a wider linear dynamic range of BPA determination in 0.1 μmol·L −1 to 100 μmol·L −1 with a detection limit of 7.8 nmol·L −1 (S/ N = 3). The proposed method was applied to measure the content of BPA in different brands of drinking water with satisfying recovery from 97.4 to 102.4%.
Graphical abstract
研究领域:
材料科学
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环境科学
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分析化学
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2021
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IF 2.495
Haihong Xia,Jing Li,Changzhou Chen,Dichao Wu,Jurong Ren,Jianchun Jiang,Minghao Zhou
Metal-organic frameworks (MOFs) as an emerging class of porous materials exhibit some unique advantages, including controllable composition, a large surface area, high porosity, and so on. In this work, the spherical NiMo bimetal catalysts supported on porous carbon matrix were prepared using a simple wet impregnation method and studied for selective hydrogenation of furfural (FFA). Three different catalysts were investigated including Ni/C-Mo-BTC, Ni/C-Mo-DHTA and Ni/C-Mo-PTA. Of the catalysts studied the Ni/C-Mo-BTC catalyst could achieve the highest selectivity of CPL (up to 90%) under moderate reaction conditions (140 °C, 2 MPa, 2 h) in aqueous medium. In addition, other Ni-based catalysts (Ni/C-Fe, Ni/C-Zn, Ni/C-Cu, Ni/C-Ce) were also investigated to achieve yields of 20–70% under the same reaction conditions. The influence of temperature, H 2 pressure, time and solvent were investigated for the best performing catalyst. Based on the optimal reaction condition, various of furfural derivatives could also be effectively transferred to produce corresponding products. The detailed physicochemical characterization was carried out by means of XRD, SEM, TEM, XPS, NH 3 -TPD and Raman analysis. In the end, the optimal Ni/C-Mo0.4 catalyst could be recycled magnetically and efficiently applied in the next run for five consecutive recycling tests in the FFA hydrogenation to CPL. The results suggested Ni/C-Mo0.4 catalyst occurred to increasingly favor the formation of Ni-Mo alloys and suggested a metallic active site in FFA hydrogenation with the addition of element Mo. Mechanism study indicated that water was a key factor contributing to the formation of different desired products, which was responsible for the arrangement of furan compound.
研究领域:
化学工程
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催化材料科学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2023
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IF 6.1
Qin Zhang,Lijiao Fan,Wenbin Liu,Yuming Xie,Jiangang Li,Guolin Huang
The core–shell structure UiO-66-NH 2 @Ni-MOF was prepared by in-diffusion growth of 2D Ni-MOF on UiO-66-NH 2 using PVP (polyvinylpyrrolidone) as a structural guide. It was applied to the adsorption of U(VI) in aqueous solution. The materials were characterized by powder X-ray diffraction (PXRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive spectrometer (EDS). The UiO-66-NH 2 @Ni-MOF adsorption to U(VI) was investigated experimentally. The study showed that the adsorption of U(VI) onto UiO-66-NH 2 @Ni-MOF was endothermic and spontaneous. At pH 5.00 and 308 K, the adsorption capacity was 581.40 mg/g according to Langmuir model. In addition, the adsorption process can be described by the pseudo-second-order kinetic model. The adsorption capacity was kept at 83.83% of its original one after five sorption–desorption cycles, a promising indication for repetitive usage.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
X. Li,J. Li,Y. Zhang,P. Zhao
Ni-MOF derived NiO nanosheets growing on rGO have been successfully synthesized by a hydrothermal method following by a series of calcination procedures (300 °C, 400 °C, and 450 °C). The influence of the introduction of rGO and the calcination temperature on electrochemical performance of Ni - MOF derived NiO nanosheets as the electrode material were highlighted in detail. For the three-electrode test system, Ni-MOF derived NiO/rGO composites subjected to calcination at 300 °C demonstrated the highest specific capacitance (435.25 F·g −1 at 1 A·g −1 ), and maintained 68.00% of its initial value at 8 A·g −1 . Its specific capacitance was increased by 49.34% when compared with the initial value after 25,000 cycles at 50 mV·s −1 . With the increase in calcination temperature, the specific capacitance presented the downward tendency (400 °C: 171.50 F·g −1 at 1 A·g −1 , 450 °C: 116.00 F·g −1 at 1 A·g −1 ) due to the reduction in specific surface area originating from the agglomeration of NiO nanosheets. The introduction of rGO greatly enhanced the electrochemical performance of the composites treated at 300 °C (increased by 40.40% at 1 A·g −1 and 47.30% in specific capacitance at 8 A·g −1 ). The assembled hybrid supercapacitors (HSC) with Ni-MOF derived NiO/rGO composites (300 °C) and active carbon as the cathode and anode also displayed the outstanding electrochemical performance. The value of energy density reached to 76.96 Wh·kg −1 at the power density of 400 W·kg −1 . All these results confirm that the MOF-derived NiO/ rGO composite should be a potential electrode material for supercapacitors .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Jiayu Lin,Yongbo Hou,Lailong Ding,Yifan Wang,Jinhu Hu,Peisong Dong,Qin Wang,Mingliang Ma
Polyurea (PUA) is widely used as a coating in construction, tunnels, bridges, and other fields because of its excellent performance. However, its combustion emits toxic gases and smoke, hindering escape and posing potential fatality risks. Enhancing the flame retardancy of PUA is crucial for safety and expanding its applications. The synthesis of two-dimensional FePP nanosheets was reported in this paper, employing the solvothermal method, followed by the sequential growth of MoS 2 and Ni-MOF to establish a multilayer composite structure. The elemental composition and morphology of the synthesized FePP@MoS 2 @Ni-MOF flame retardants were characterized and analyzed. The flame retardant properties of polyurea composites with varying amounts of FePP@MoS 2 @Ni-MOF were investigated using Cone calorimeter tests. The results showed that the prepared flame retardant had good thermal stability and significantly improved fire safety properties. The PUA/FePP@MoS 2 @Ni-MOF 3.0 composite exhibited notable improvements compared to pure PUA. Specifically, the peak heat release rate, total heat release rate and peak smoke production rate were reduced by 39.76%, 29.33% and 17.86%, respectively, while total smoke production and total CO production (COP) were reduced by 21.30% and 54.47%. This study provides new insights and experimental basis for the technological development of novel flame retardant coating materials.
研究领域:
材料科学
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化学工程
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火灾安全科学
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Cheng Guo,Xuehai Ren,Changyan Guo,Naeem Akram,Muhammad Saad Mansha,Ali Ahmad,Saman Khawaja,Jide Wang
In this study, the CdS/Ni-MOF74 (CNM) photocatalyst was synthesized via the combination of CdS with the advantageous properties of MOFs. The composites exhibit a wide visible absorption and photo electron-hole separation efficiency, thus giving improved bifunctional properties for H 2 evolution in conjunction with the benzyl alcohol’s oxidation. The results indicate that as synthesized CNM3 catalyst shows excellent efficiency of hydrogen evolution having an evolution rate of 5783 µmol g −1 h −1 , and the amount of benzaldehyde generated after benzyl alcohol’s oxidation reached 8059.8 µmol g −1 . After four cycles, the H 2 evolution efficiency remained at 5351 µmol g −1 h −1 . According to experiments using radical trapping and mechanistic investigations, it was revealed that the photogenerated holes (h + ) were the key species mainly responsible for benzaldehyde production as well as H 2 evolution. This research work could lead to new approaches resulting in simultaneous organic oxidation processes and hydrogen evolution by using MOF-derived hybrid photocatalysts.
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
Scientific Reports
·
2021
·Vol. 11
·期 1
·1-11
·
IF 4.38
Wang Haitao,Zou Haiyan,Liu Yingying,Liu Zhenglong,Sun Wenshuang,Lin Kunyi Andrew,Li Tielong,Luo Shuangjiang
It’s highly desired but challenging to synthesize self-supporting nanohybrid made of conductive nanoparticles with metal organic framework (MOF) materials for the application in the electrochemical field. In this work, we report the preparation of Ni 2 P embedded Ni-MOF nanosheets supported on nickel foam through partial phosphidation (Ni 2 P@Ni-MOF/NF). The self-supporting Ni 2 P@Ni-MOF/NF was directly tested as electrode for urea electrolysis. When served as anode for urea oxidation reaction (UOR), it only demands 1.41 V (vs RHE) to deliver a current of 100 mA cm −2 . And the overpotential of Ni 2 P@Ni-MOF/NF to reach 10 mA cm −2 for hydrogen evolution reaction HER was only 66 mV, remarkably lower than Ni 2 P/NF (133 mV). The exceptional electrochemical performance was attributed to the unique structure of Ni 2 P@Ni-MOF and the well exposed surface of Ni 2 P. Furthermore, the Ni 2 P@Ni-MOF/NF demonstrated outstanding longevity for both HER and UOR. The electrolyzer constructed with Ni 2 P@Ni-MOF/NF as bifunctional electrode can attain a current density of 100 mA cm −2 at a cell voltage as low as 1.65 V. Our work provides new insights for prepare MOF based nanohydrid for electrochemical application.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Plasma Processes and Polymers
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2024
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IF 2.9
Qinlong Song,Xianyi Yin,Haibao Zhang
Designing efficient noble metal-free catalysts for plasma-catalytic ammonia synthesis is significant and challenging. Carbon-based metal catalysts were prepared at different pyrolysis temperatures using the Ni-MOF-74 precursor. The effects of Ni-MOF-74 and its derived carbon-based metal catalysts on pulsed dielectric barrier discharge (DBD) plasma ammonia synthesis were investigated. The results showed that Ni-MOF-74-300 with both the MOF structure and nickel metal particles exhibited the best catalytic performance for ammonia synthesis. The ammonia synthesis rate reached 41.38 mmol g −1 h −1 , whereas the nitrogen conversion rate was as high as 1.54% with an energy yield of 3.04 g kWh −1 . Compared to the situation of plasma only, the ammonia synthesis rate, nitrogen conversion rate, and energy yield were increased by 28.46 times, 5.7 times, and 5.5 times, respectively.
研究领域:
化学工程
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催化材料科学
✓ 已验证
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2017
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IF 3.615
Tingting Xu,Xudong Hou,Shengjun Liu,Bo Liu
We demonstrated a facile and efficient method for the preparation of a magnetic and porous Ni@MOF-74(Ni) [Ni 2 (DOBDC), DOBDC = 2, 5-dihydroxyterephthalate] composite by one-step solvothermal reaction of Raney Ni and DOBDC. Ni in the reaction not only acted as the core of the composite, but also provided metal source for the formation of MOF-74(Ni). The Ni@MOF-74(Ni) composite exhibits both magnetic characteristics and high porosity, enabling it an efficient candidate for dye removal and target drug delivery system. The adsorption amount of rhodamine b reached up to 177.8 mg g −1 , and 4.1 mg g −1 for ibuprofen.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Yijun Wang,Mei Li,Zhiliang Jin,Shiyong Xu,Ziyu Li,Meijuan Ding
Coal tar pitch-based carbon quantum dots (CQDs) were meticulously prepared via ball milling. Ag 3 PO 4 /Ni-MOF/CQDs composites were synthesized through an in-situ precipitation method, and their performance as composite catalysts for the photocatalytic degradation of phenol was thoroughly investigated. Among these composites, Ag-Ni-70/CQDs-0.45 emerged as the most effective catalyst, achieving a remarkable degradation rate of 98% for 10 mg/L phenol within just 30 min, with a corresponding rate constant of 0.0620 min −1 . Notably, the photocatalytic degradation of phenol exhibited robust activity across a spectrum of pH levels, different water matrices, and varying concentrations of anions (SO 4 2− , Cl − , CO 3 2− , HPO 4 2− and HCO 3 − ). Furthermore, after undergoing 4 cycles of reaction, the catalyst demonstrated commendable stability. The outcomes of free radical capture experiments revealed that the primary active species involved in the degradation process were ·OH and h + . The electron transport pathways were analyzed based on the band gap structure of the catalyst, and a possible degradation mechanism was proposed. Upon the combination of Ni-MOF and Ag 3 PO 4 , the alteration of metal-O bonds facilitated the formation of a tightly bonded interface, thereby establishing a Z-scheme heterojunction. The introduction of CQDs as an electron transport medium accelerated electron transfer, mitigated the recombination of photogenerated charges, and thereby enhanced the photocatalytic performance of the heterostructure.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）