JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yafeng Jin,Guangri Xu,Xiaobo Li,Jingjing Ma,Li Yang,Yuanchao Li,Huan Zhang,Zhen Zhang,Donghao Yao,Donghao Li
To circumvent the binder’s adverse effect on the performance of electrochemical sensor and improve the analysis efficiency, a binder-free cobalt-doped Ni-MOF (Co/Ni-MOF) film, with honeycomb-like structure, is fast electrodeposited on glassy carbon electrode (GCE) by cathodic reduction. No conductive agent added, the Co/Ni-MOF/GCE can be directly used as a sensor for levofloxacin (LEV) determination. Under the optimal condition, a wider linear range of 0.1 μM–500 μM LEV is obtained with the limit of detection (LOD, 3S/N) being 22 nM and the sensitivity of 2.85 μA μM −1 cm −2 . Further, when being used to analysis of LEV in eye drop and spiked milk, satisfactory recoveries of 94.0%–108.2% are achieved. Particularly, benefiting of the synergistic effect of Co 2+ and Ni 2+ , as well as and the binder-free film, the sensor exhibits an excellent sensitivity and a robust long-term stability. This work develops a facile and efficient strategy to synthesis of Co and Ni based MOF film, and provides them a new way in electrochemistry application.
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 17
·6065-6075
·
IF 5.721
Jundong Xu,Chenglong Wen,Shuisen He,Yu Fan
This article presents novel decyltrimethylammonium bromide-dispersed Ni–Mo sulfide (DTMA-NiMo) as a precursor for preparing an efficient NiMoS/γ-Al2O3 hydrodesulfurization (HDS) catalyst. The as-synthesized DTMA-NiMo is a sulfide containing both long-chain quaternary ammonium and Ni–Mo–S elements. The proposed method not only significantly improves the dispersion of Mo species but also greatly promotes the incorporation of Ni into MoS2 slabs, leading to an increase in the number of NiMoS phases. As a result, the DTMA-NiMo-based NiMoS/γ-Al2O3 catalyst exhibits much higher activity for the HDS of 4,6-dimethyldibenzothiophene (4,6-DMDBT) and fluid catalytic cracking (FCC) diesel than NiMoS/γ-Al2O3 catalysts prepared by the co-impregnation and tetrapropylammonium bromide (TPAB)-assisted methods. This novel strategy sheds a light on the facile and low-cost preparation of superior NiMoS phases without sulfidation treatment.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2020
·Vol. 68
·期 4
·582-591
·
IF 1.554
Changzhou Chen,Peng Liu,Haihong Xia,Minghao Zhou,Jianchun Jiang
There is an urgent need to develop a selective hydrogenolysis of C aryl -O bonds in lignin to produce valued-added chemicals and fuels. Recently, hydrogen has been used in the hydrogenation reaction, which hides inevitable danger and is not economical. Therefore, isopropanol, as a hydrogen-donor solvent, is employed for aryl ether hydrogenolysis in lignin models over nickel supported on a carbon nanotube (CNT). Except for aromatic ether (4-O-5), the Ni/CNT catalyst is also found to be suitable for alkyl-aryl ether (α-O-4 and β-O-4) cleavage in control experiments. The physicochemical characterizations were carried out by means of H 2 -temperature-programmed reduction, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy analyses. The catalyst can be magnetically recovered and efficiently reused for five consecutive recycling tests in the transfer hydrogenation of aromatic ethers. A mechanism study indicated that the hydrogenolysis cleavage of the ether bond is the first step in the reaction process, and hydrogenation of aromatic rings is only a successive step in which phenol and benzene are intermediate states and are then further hydrogenated. Furthermore, it has been demonstrated that aryl groups play an important role in the hydrogenation of phenol in the competitive catalytic hydrogenation reaction of phenol.
✓ 已验证
产品关联
DOI
高影响因子
ChemCatChem
·
2020
·Vol. 13
·期 1
·346-352
·
IF 4.853
Chen Chen,Jianzhi Wang,Pan Li,Qifeng Tian,Zhuangwei Xiao,Shuaijie Li,Ning Cai,Yanan Xue,Weimin Chen,Faquan Yu
Graphical 2D bimetal-organic frameworks : Graphene aerogel can serve as both the “room” for numerous MOFs and the “conductive bridge” to connect MOFs with metal foam. A 2D bimetallic MIL-53(FeNi) encapsulated in graphene aerogel-grafted Ni foam acts as a binder-free electrode for OER, exhibiting remarkable stability in alkaline media. Metal-organic frameworks (MOFs) have been considered as promising platforms for preparing the efficient oxygen evolution reaction (OER) catalysts, but few of them are directly employed as active components due to their poor electrical conductivity. Herein, a lamellar bimetallic MFN (MIL-53(FeNi)) encapsulated in graphene aerogel-grafted Ni foam has been developed (denoted as MFN@GA/NF). The graphene aerogel (GA) provides abundant space for the in-situ growth of MFN and functions as a “bridge” to connect nickel foam (NF) with MFN by virtue of good conductivity. Benefitting from its structural integrity, the obtained hierarchical MFN@GA/NF exhibited excellent OER performances in alkaline media with an overpotential of 250 mV (20 mA cm −2 ) and 326 mV (200 mA cm −2 ), as well as remarkable stability in continuous electrolysis for over 100 h. This work provides a new channel for engineering MOF-based functional materials with featured architectures.
✓ 已验证
产品关联
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.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
·
2020
·
IF 3.905
Tong Li,Hao Li,Guoming Huang,Xinhui Shen,Siqi Wang,Chunli Li
The development of a carbon-based catalyst for selective transformation of renewable lignin to value-added chemicals is a fascinating chemical upgrade route. In this study, the highly efficient Ni/C catalysts derived from waste biomass tar was fabricated for selective hydrogenation-transalkylation (HTTA) of guaiacol to 1-methyl-1,2-cyclohexanediol. Carbonization temperatures and activators can be used to regulate the contents of oxygen-containing functional groups on carbon surface, which further affect the catalytic performance. Results showed that the Ni/C-K-800 catalyst with KOH as activator and 800 ℃ as carbonization temperature exhibited the excellent catalytic performance (about 100 % conversion) for the guaiacol transformation at 220 ℃, 2 MPa H 2 for 2 h, and the final product could be stably controlled at 1-methyl-1,2-cyclohexanediol. Main reaction pathway of guaiacol over Ni/C catalyst was proposed: 1) conversion of guaiacol to 1-methyl-1,2-cyclohexanediol through transalkylation and hydrogenation of benzene ring; 2) transform of 1-methyl-1,2-cyclohexanediol to cyclohexanol through direct hydrogenolysis. Furthermore, biomass tar-derived carbon support has good resistance towards carbon accumulation on Ni metals. These findings can provide a basis for designing green and efficient catalyst derived from biomass tar for biomass upgrading.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Yanxia Zhu,Ze Zhang,Jun Cheng,Hao Guo,Weijuan Yang
To improve catalytic performance of metal active sites in hydrodeoxygenation and hydrocracking conversion of methyl palmitate into high-quality jet biofuel, Ni-1,3,5-benzenetricarboxylate (Ni-BTC) metal-organic framework loaded on MCM-41(Mobil Composition of Matter No. 41) was prepared to enhance the accessibility of Ni active sites, facilitating hydrodeoxygenation to increase alkane yield with suitable arene content. The distance (0.98 nm) between Ni active sites within Ni-BTC structure, which was much larger than that (0.20 nm) within Ni nanoparticles , enabled methyl palmitate with maximum molecule width of 0.68 nm to go through Ni-BTC crystalline plane and get access to Ni active sites more easily. Ni-BTC nanosheets newly assembled in pore channels of MCM-41 were beneficial to effectively screen chain molecules of alkane products. With the largest BET surface area of 1014.2 m 2 /g, the Ni-BTC@MCM-41 catalyst with 2.5 wt% nickel (2.5Ni-BTC@MCM-41) reduced the nickel metal consumption by 75% comparing to nickel nanoparticle loading (10Ni@MCM-41), but achieved the best catalytic performances through hydrodeoxygenation on Ni active sites and hydrocracking on -SiOH acid sites. The alkane yield increased from 23.3% to 33.9%, while arene yield reduced from 22.4% to 6.5% in jet biofuel products. This resulted in an overall jet biofuel yield of 53.2% with uniform distribution along carbon numbers . The higher heating value of jet biofuel products thus increased to a peak of 45.90 MJ/kg.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2020
·
IF 3.573
Ying-Bo Zhu,Jia Guo,Yu-Long Ma,Yuan-Yuan Li
The production of high-value-added chemicals from the degradation of real lignin still has been an unresolved issue. In this study, a two-step strategy was proposed to obtain n-hexanol from alkali lignin, and high conversion of alkali lignin and selectivity of n-hexanol were achieved. The deoxygenation performance of the synthesized Ni-HZSM-5 catalyst, modified by Ca, was efficiently improved. At first, through the deoxygenation of alkali lignin via Ni/CaO-HZSM-5, the C–O bonds of the material were broken effectively and 44% degree of deoxygenation (DOD) was obtained. Second, n-hexanol was selectively produced over the Ni/HZSM-5 catalyst from the liquid product obtained by the first step. The efficiency of deoxygenation (DOD) was attained at 71%, and the heat value increased to 51.6 MJ/kg from 19.9 MJ/kg after the two-step strategy. This strategy showed a high catalytic effect to produce n-hexanol from alkali lignin using Ni/CaO-HZSM-5 and Ni/HZSM-5 catalysts and revealed a superior advantage in the hydrodeoxygenation of real lignin to form high additional value chemicals.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2020
·
IF 9.038
Weitian Cai,Dionysios D. Dionysiou,Fenglian Fu,Bing Tang
The treatment of heavy metal pollution in aquatic environment, especially the pollution caused by multiple heavy metal ions, has been a growing global concern for decades. To address this problem, it is urgent to explore effective and low cost adsorbents which can remove multiple heavy metal ions simultaneously. Herein, Cr(VI) and Ni(II) removal from water by MoS 2 with widened interlayer spacing was systematically investigated in comparison with pure MoS 2 . A series of techniques, including X-ray powder diffraction (XRD), Transmission electron microscopy (TEM), and Brunauer–Emmett–Teller (BET) surface area and porosimetry analysis were applied to characterize the nanocomposites. The XRD results confirmed the enlarged interlayer spacing of MoS 2 by intercalating cetyl trimethyl ammonium bromide (CTAB) into the interlamination. The maximum adsorption capacities of Cr(VI) and Ni(II) for MoS 2 /CTAB were 79.4 mg g −1 and 88.3 mg g −1 , respectively. Moreover, a synergistic effect in the simultaneous removal of Cr(VI) and Ni(II) was observed. A new Cr(VI) removal mechanism involving redox reaction between Cr(VI) and Mo(IV) in MoS 2 /CTAB was verified. The removal efficiencies of Cr(VI) and Ni(II) still remained high at the end of fifth cycle, indicating that MoS 2 /CTAB has a great potential to remove heavy metals from wastewater.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Xingpeng Gao,Yingying Hu,Yanpei Li,Jingyi Wang,Xiangwei Wu,Jianhua Yang,Zhaoyin Wen
Improved power and cycle performances are eagerly required in intermediate-temperature sodium–metal halide (Na–MH) batteries. The existence of the low conductivity NiCl2 layer and the growth of the Ni and the NaCl particles limit the broader application of Na–NiCl2 battery. Herein, nickel–carbon composite nanofiber (NCCN) networks are synthesized by a multisolution electrospinning method to construct a novel three-dimensional cathode for Na–NiCl2 battery. The battery with the NCCN-based cathode shows significant improvement in rate and cycle performance at 190 °C. A capacity twice that of a conventional electrode after 100 cycles and 80% of the initial capacity after 400 cycles are observed at a current of 57 mA g–1. The NCCN-based cathode normally works more than 350 cycles without obvious degradation at a high current of 338 mA g–1, that is, a rate of 2C. Furthermore, in situ electrochemical impedance spectroscopy reveals faster electron and ion transport processes precisely on the charging and discharging processes of the NCCN-based cathode. It is found that the NCCNs can not only play the role of a continuous conductivity network but also limit the growth of grains. With the blocking effect of the carbon fibers, the volume expansions of Ni and NaCl grains are well restricted and their sizes were smaller than 500 nm and 7 μm after 50 cycles, respectively.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Nihad Ibrahim Mohammed Abdallah,Yan Li,Xiao-Tian Wang,Xue Li,Cheng-Wei Wang
Configuring new nanostructured photocatalyst with high efficient photocatalystic capabilities is meaningfully for environmental pollution control. Herein, a p-n heterojunction nanostructured photocatalyst of Ni(OH) 2 /BiVO 4 was well designed and successfully fabricated via a facile solvothermal method, in which Ni(OH) 2 is a wide band-gap semiconductor. Being applied for photo-degradation of anion organic dye, it is found such Ni(OH) 2 /BiVO 4 heterostructures can not only increase the specific surface area and enhance the light response, but also effectively facilitate the photo-generated charge separation and transfer. As a result, 0.5-Ni(OH) 2 /BiVO 4 can possess a photocatalytic capability of 96% and a reaction rate constant 1.9572 h −1 within 90 min irradiation, being 6 and 18 times higher than that of pure BiVO 4 (16%, 0.1098 h −1 ). This study presents a new means to design a kind of high efficient wide band-gap semiconductor constructed BiVO 4 -based photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2020
·Vol. 217
·期 15
·2000135
·
IF 1.759
Jingxue Zhang,Hongtao Cui
The pore-structural ordering in nanosheets-interlinked clusters is a significant issue for the electrochemical performance of Ni(OH) 2 as an electrode material for application in Faraday supercapacitors. Herein, the W/O emulsion stabilized by high shear mixer (HSM) is used as a medium to organize the pore structure in Ni(OH) 2 nanosheets-interlinked spheres. It is found that the water content in emulsion strongly affects the pore structure and surface area of Ni(OH) 2 nanosheets-interlinked spheres formed through the granulation effect of HSM. It is considered that the oil phase as continuous phase in emulsion can reduce the aggregation/agglomeration of Ni(OH) 2 nanosheets, resulting from the strong intermolecular force between nanosheets. As a result, the oil phase in emulsion is beneficial to the formation of ordered pore structure and the increase of surface area in the produced spheres. The characterization results indicate that the sample prepared at a water content of 20 vol% has the largest specific surface area and the well-defined pore structure enclosed with interlinked nanosheets. As a result, this sample presents excellent electrochemical performance and promoted cycling stability.
✓ 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）