JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2018
·
IF 3.235
Qingfeng Zhou,Yun Gong,Jianhua Lin
NiV 2 O 6 /C composites are prepared via a solid-state conversion process by low temperature (150 °C) annealing nickel‑vanadium-based coordination polymer , [Ni(phen)H 2 O][V 2 O 6 ]. The obtained NiV 2 O 6 /C nanoribbons are interconnected to form a sponge-like morphology, when the composites are first used as supercapacitor electrode, it exhibits a specific capacitance of 745.6 F g −1 at 0.5 A g −1 with a good rate capability of 520.0 F g −1 (69.7% retention) at 10 A g −1 (20-folds). The NiV 2 O 6 /C composite exhibits good cycling performance, the capacitance retentions at 6000th and 12000th charging/discharging cycles at 2 A g −1 are 81.5% and 77.8% relative to the original capacitances, respectively. The morphological and compositional changes of the NiV 2 O 6 /C composite electrode before and after 12,000 GCD cycles (two-electrode system) are carefully elaborated through a series of characterization (SEM, EDS , and XPS). Furthermore, the NiV 2 O 6 /C nanoribbons possess reversible electrochromism , which is probably related to the intervalence charge transfer (IVCT, V IV → V V ).
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CHEMOSPHERE
·
2018
·
IF 4.427
Zilong Zhao,Zekun Liu,Hongjie Wang,Wenyi Dong,Wei Wang
Treatment of Ni-EDTA in industrial nickel plating effluents was investigated by integrated application of Fenton and ozone-based oxidation processes. Determination of integrated sequence found that Fenton oxidation presented higher apparent kinetic rate constant of Ni-EDTA oxidation and capacity for contamination load than ozone-based oxidation process, the latter, however, was favorable to guarantee the further mineralization of organic substances, especially at a low concentration. Serial-connection mode of two oxidation processes was appraised, Fenton effluent after treated by hydroxide precipitation and filtration negatively affected the overall performance of the sequential system, as evidenced by the removal efficiencies of Ni 2+ and TOC dropping from 99.8% to 98.7%, and from 74.8% to 66.6%, respectively. As a comparison, O 3 /Fe 2+ oxidation process was proved to be more effective than other processes (e.g. O 3 -Fe 2+ , O 3 /H 2 O 2 /Fe 2+ , O 3 /H 2 O 2 -Fe 2+ ), and the final effluent Ni 2+ concentration could satisfied the discharge standard (<0.1 mg L −1 , China) under the optimal conditions (H 2 O 2 dosage of 1.0 mL L −1 , Fe 2+ : H 2 O 2 mole ratio of 1.46, and reaction time of 10 min for Fenton reaction , initial influent pH of 3.0, O 3 dosage of 252 mg L −1 , Fe 2+ of 150 mg L −1 , and reaction time of 30 min for O 3 /Fe 2+ oxidation). Furthermore, pilot-scale test was carried out to study the practical treatability towards the real nickel plating effluent, revealing the effective removal of some other co-existence contaminations. And Fenton reaction has contributed most, with the percentage ranging from 72.41% to 93.76%. The economic cost advantage made it a promising alternative to the continuous Fenton oxidation.
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高影响因子
FUEL PROCESSING TECHNOLOGY
·
2018
·
IF 3.956
Limo He,Song Hu,Long Jiang,Guang Liao,Xiaofang Chen,Hengda Han,Lingfeng Xiao,Qiangqiang Ren,Yi Wang,Sheng Su,Jun Xiang
The effects of catalyst supports (γ-Al 2 O 3 and α-Al 2 O 3 ) on hydrogen yield and carbon nanotubes formation were studied during steam reforming of toluene over Ni-based catalysts. Hydrogen yield and CNTs quality over Ni/γ-Al 2 O 3 were better than those over Ni/α-Al 2 O 3 at S/C ratio of 1 due to the high Ni dispersion of Ni/γ-Al 2 O 3 . With the increasing of steam addition, CNTs production remarkably increased over Ni/α-Al 2 O 3 , while it decreased over Ni/γ-Al 2 O 3 . The CNTs on Ni/γ-Al 2 O 3 were corroded at S/C ratio of 3 by excess steam. Toluene conversion and hydrogen yield over Ni/α-Al 2 O 3 were significantly larger than those over Ni/γ-Al 2 O 3 , which was attributed to the different effects of CNTs on catalytic activity . The strong interaction between Ni particle and γ-Al 2 O 3 led to the base-growth mechanism of CNTs on Ni/γ-Al 2 O 3 in which Ni particles located at the bottom of CNTs, thus the growth of CNTs covered Ni active sites and decreased catalytic activity of Ni/γ-Al 2 O 3 . By contrast, owing to weak interaction, CNTs grown on Ni/α-Al 2 O 3 followed tip-growth mechanism that would increase Ni dispersion and promote reforming reaction .
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JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Huiyu Liang,Ke Xiao,Liyan Wei,Bo Yang,Gang Yu,Shubo Deng,Huabo Duan,Caizhen Zhu,Juying Li,Junmin Zhang
A novel CuO-CeO 2 -CoO x nanocatalyst was prepared for heterogeneous Fenton-like reaction to break the Ni 2+ -chelate into free Ni 2+ in electroless nickel plating wastewater, followed by separation of Ni 2+ in an insoluble form. The composite nanocatalysts prepared by co-precipitation method were characterized by XRD, TEM, and XPS, et al. Its catalytic activity as Fenton-like reagent was evaluated by the removal efficiency of Ni(II)-citrate after decomplexation and postprecipitation treatment. Subsequently, the effects of operating parameters on the decomplexation efficiency of the nanocatalysts were investigated including calcination temperature of catalysts, H 2 O 2 concentration, catalyst dosage, initial pH and reaction temperature. Under optimized condition, the Ni(II)-citrate complexes ( C 0 = 1.0 mM) achieved the complete decomplexation (>99.9%) within 60-min reaction using 0.3 g/L of CuO-CeO 2 -CoO x calcined at 450 °C and 75 mM of H 2 O 2 at pH 3.0 under 50 °C of reaction. Then, Ni 2+ after decomplexation could be completely removed by the subsequent precipitation at pH 11.0. In addition, the life test of CuO-CeO 2 -CoO x catalyst indicated that, after recycled 10 times, its activity for decomplexation of Ni(II)-citrate decreased no more than 8%. As a result, this new heterogeneous Fenton-like process is promising for decomplexation and purification of electroless nickel plating wastewater as a sludge reduction technology.
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Nano Energy
·
2019
·
IF 15.548
Wei Shuang,Hui Huang,Lingjun Kong,Ming Zhong,Ang Li,Danhong Wang,Yunhua Xu,Xian-He Bu
Nickel sulfides are suitable anode materials for sodium-ion batteries (SIBs) because of their moderate cost and high theoretical capacity. Nevertheless, low cycling stability and rate performance caused by volume expansion and inferior electronic conductivity during the charge/discharge process still hamper their development. Herein, Ni 3 S 2 nanoparticles uniformly embedded in N-doped carbon nanosheets (Ni 3 S 2 @C) are synthesized by sulfuration of a Ni-based metal-organic framework (Ni-MOF), followed by coating with polypyrrole (PPy). The PPy protects Ni 3 S 2 particles from aggregation, and is converted to N-doped carbon shell during the annealing process . The nano-sized structure accelerates reaction kinetics and minimizes stress/strain caused by volume changes. The N-doped carbon nanosheets connect the transmission pathway of the electrons, and buffer the volume change during the electrochemical reaction . As expected, NiSx@C-600 delivers superior sodium storage performance with a high discharge capacity of 432.8 mA h g −1 at 0.2 A g −1 over 100 cycles and remarkable rate capacity of 371.6 mA h g −1 at a high rate of 6.4 A g −1 . To the best of our knowledge, the obtained nanosheets exhibit the best rate performance among current Ni 3 S 2 composites. The proposed method for enhancing conductivity and doping heteroatom by using PPy provides a novel insight to design SIB anodes with superior performance.
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Catalysts
·
2019
·Vol. 9
·期 7
·606
·
IF 3.444
Chuanmin Ding,Junwen Wang,Yufeng Li,Qian Ma,Lichao Ma,Jing Guo,Zili Ma,Ping Liu,Kan Zhang
The supporting modes of active metal over mesoporous materials play an important role in catalytic performance. The location of Ni nanoparticles inside or outside the mesoporous channel of MCM-41 has a significant influence on the reactivity in partial oxidation of methane to syngas reaction. The characterization data using different techniques (Transmission Electron Microscope (TEM), X-Ray Diffraction (XRD), N2adsorption-desorption, H2Temperature-Programmed Reduction (H2-TPR), and Inductively Coupled Plasma (ICP)) indicated that nickel was located outside the mesoporous channels for the impregnation method (Ni/MCM-41), while nickel was encapsulated within MCM-41 via the one-step hydrothermal crystallization method (Ni-MCM-41). The nickel atoms were mainly dispersed predominantly inside the skeleton of zeolite. When the load amount of Ni increased, both of Ni species inside the skeleton or pore channel of zeolite increased, and the ordered structure of MCM-41 was destroyed gradually. Contributed by the strong interaction with MCM-41, the Ni particles of Ni-MCM-41 were highly dispersed with smaller particle size compared with supported Ni/MCM-41 catalyst. The Ni-MCM-41 displayed higher catalytic performance than Ni/MCM-41, especially 10% Ni-MCM-41 due to high dispersity of Ni. The confinement effect of MCM-41 zeolite also afforded high resistance of sintering and coking for 10% Ni-MCM-41 catalyst. Especially, 10% Ni-MCM-41 catalyst showed outstanding catalytic stability.Keywords:partial oxidation of methane;sintering and coking resistance;Ni location;confinement effect;MCM-41 zeolite
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RSC Advances
·
2017
·Vol. 7
·期 79
·50358-50366
·
IF 3.108
Yue Wang,Xianfeng Zhang,Xin Li,Yang Liu,Xiaoping Wang,Xi Liu,Jian Xu,Yongwang Li,Yongguang Liu,Hang Wei,Peng Jiang,Minghui Liang
Iron oxide nanoparticles intercalated in Ni(OH)2 nanosheets were prepared in a spontaneous way for the cathode materials of asymmetric supercapacitors. The soluble precursor of Ni(OH)2, Ni(NH3)6(OH)2, was used for growth on α-Fe2O3 nanoparticles. The loading percentages of Ni(OH)2 in the Ni(OH)2–α-Fe2O3 nanocomposites had a great influence on the morphology and size of Ni(OH)2. The composites were characterized by TEM, SEM, ICP-OES, XRD and XPS. The specific capacitance of Ni(OH)2 in the composite can reach 1107 F g−1 at a scan rate of 20 mV s−1, and the specific capacitance of the Ni(OH)2–α-Fe2O3 composite can be up to 376 F g−1 at a scan rate of 5 mV s−1. More importantly, the fabricated Ni(OH)2–α-Fe2O3//AC (activated carbon) asymmetric supercapacitor exhibited energy density and power density of 31.6 W h Kg−1 and 474 W Kg−1, respectively. The cycling performance of the asymmetric supercapacitor was also excellent, and the capacitance retention reached 89.6% after 5000 charge–discharge cycles. Red, blue and yellow LED lights can be lit up with two series of asymmetric supercapacitors, revealing their potential application in energy storage.
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TALANTA
·
2017
·
IF 4.162
Qi Wang,Qian Zhou,Qicheng Zhang,Rongjia Shi,Shangshang Ma,Wenbo Zhao,Min Zhou
Preparation of high performance electrochemical biosensing interface for the sensitive and rapid detection of human metabolites is of great interest for health care and biomedical science. In this paper, based on the adhesion technique of marine mussels, we designed and prepared a novel biosensor with a micro/nano-biointerface of Fe 3 O 4 -Mn 3 (PO 3 ) 2 @Ni foam, which offered a three dimensional (3D) living environment for real cell. The constructed biosensor with a 3D micro/nano-biointerface of Fe 3 O 4 -Mn 3 (PO 3 ) 2 @Ni foam was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and elemental mapping. Furthermore, the electrochemical experiments by electrochemical method for detection of superoxide anion (O 2 •− ) in situ released by cells were carried out by this biosensor we proposed. Results indicated that the 3D interface of mussel-inspired Fe 3 O 4 -Mn 3 (PO 3 ) 2 @Ni foam offered an amicable platform for promoting cell adhesion, which was beneficial for enhancing biosensing activity. This proposed sensing platform provided high electroactivity and excellent electron transport with a lower detection limit (0.0170 μM), wider linear range 0.04–2.44 μM) and short diffusion distance to reaction sites. The case achieved the accurate detection of O 2 •− (in situ released by cells) based on the combination of mussel-inspired biomimetic adhesion technique, 3D micro/nano-biointerface construction and electrochemical biosensing technique.
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RSC Advances
·
2024
·Vol. 14
·期 29
·20683-20690
·
IF 3.9
Danfeng Zhang,Heng Gao,Congai Han,Guoxun Zeng,Qibai Wu
With the widespread use of electronic goods, solving electromagnetic pollution has become one of the new challenges. Higher requirements for microwave-absorbing materials (MAM) have emerged to address this issue. The composite of carbon nanofiber (CNF) and magnetic nanoparticles is the material that effectively absorbs microwaves. This paper fabricated Ni/C nanofibers using a combination of electrospinning and high-temperature carbonization. With 50 wt% paraffin wax, Ni/C nanofibers demonstrated optimal microwave absorption capabilities. With a thickness of 3 mm, the minimum RL value can reach −30.6 dB, and the effective absorption bandwidth is 5.96 GHz. By encapsulating Ni nanoparticles in carbon nanofibers, the synergic interaction of dielectric and magnetic losses effectively meets the need for constant attenuation and impedance matching, and effectively improves microwave-absorbing properties. Hence, Ni/C nanofibers are promising for MAM application with excellent MA performance.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Shuyu Qi,Zilong Zhao,Yingqing Ou,Lu Liu,Yatao Ren,Wenyi Dong,Hongjie Wang,Zigong Ning
In this study, a calcium-rich biochar (CRB)-enhanced dual reaction center (DRC) Fenton-like catalyst, Cu-Al 2 O 3 -CRB, was synthesized for the decomplexation of a typical heavy metal complex pollutant, Ni-ethylenediaminetetraacetic acid (Ni-EDTA), in industrial wastewater. After a 90-minute reaction, the removal rate of Ni(II) could reach 95.2%, regardless of the initial solution pH. Various characterization analyses confirmed the formation of electron-rich Cu regions and electron-deficient Al and C regions in the Cu-Al 2 O 3 -CRB catalyst. The catalytic oxidation experiments, chronoamperometry tests, and reactive oxygen species (ROSs) detection further revealed the roles of biochar and CaCO 3 on the catalytic behavior of Cu-Al 2 O 3 -CRB catalyst. The presence of biochar not only enhanced the loading of Cu species but also introduced additional electron transfer channels, while CaCO 3 further interacted with biochar/Cu species to amplify the electron cloud density surrounding Cu. The improvement of electronic polarization facilitated the activation of H 2 O 2 and the generation of •O 2 – , 1 O 2 and •OH. Contrary to conventional interfacial reactions, the weak adsorption between Cu-Al 2 O 3 -CRB and Ni-EDTA due to the electrostatic repulsion, led to the decomplexation reactions primarily occurring in the solution phase, rather than on the catalyst surface. This study sheds light on the potential of Cu-Al 2 O 3 -CRB as a DRC catalyst and emphasizes the significance of contaminant properties when using this kind of catalysts.
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DALTON TRANSACTIONS
·
2024
·Vol. 54
·期 1
·144-151
·
IF 3.5
Yuan Rui,Zong Li,Miaohui Wang,Yunxia Liu,Haiping Lin,Peipei Huang,Qing Li
Developing electrocatalysts with fast reaction kinetics for the urea oxidation reaction (UOR) in the field of sustainable hydrogen production through urea-assisted water splitting remains challenging. Here, Ni1−xO/Ni(OH)2 supported on nickel foam (Ni1−xO/Ni(OH)2/NF) is prepared via a defect engineering strategy by combining Zn doping and acid etching. The doped Zn species are partially removed, facilitating the formation of NiOOH during acid etching. Residual Zn species modulate the electronic structure of nickel sites, which intrinsically accelerate the reaction kinetics of Ni1−xO/Ni(OH)2/NF. Ni1−xO/Ni(OH)2/NF exhibits excellent performance for the UOR with a low potential of 1.346 V versus the reversible hydrogen electrode to attain 100 mA cm−2, fast reaction kinetics (18.7 mV dec−1), and excellent stability in an alkaline electrolyte. The enhanced reaction kinetics of Ni1−xO/Ni(OH)2/NF are clearly elucidated by operando electrochemical impedance spectroscopy and in situ Raman spectroscopy. Our study offers an effective approach for designing promising Ni-based UOR catalysts for the practical application of urea-assisted water splitting.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Liying Sheng,Zhenjiang Li,Alan Meng,Qinhai Xu
The novel nanocomposite of Ni(OH) 2 nanoparticles over reduced graphene oxide and poly (3,4-ethylenedioxythiophene) hybrid film (Ni(OH) 2 @PEDOT-rGO) have been successfully fabricated via a facile, scalable and easy-to-control electrodeposition method. The characterization results of scanning electron microscope (SEM) and electrochemical techniques show that Ni(OH) 2 nanoparticles with an average particle size about 10 nm are uniformly deposited on PEDOT-rGO hybrid film with rough surface and reveal outstanding performance for detecting glucose. The enzyme-free glucose sensor exhibits an ultrafast response time (< 1 s), a wide linear range (0.002–7.1 mM), a low detection limit (0.6 μM) and a high sensitivity (346 μA mM −1 cm −2 ). Moreover, the sensor also displays superb selectivity, excellent reproducibility and good stability. The outstanding properties of the sensor may be attributed to the synergistic effect of Ni(OH) 2 nanoparticles possessing high electro-catalysis activity and PEDOT-rGO having well conductivity. More importantly, the sensor was successfully used to determine glucose in the real samples. In addition, the mechanism of electrodeposited PEDOT-rGO and glucose oxidase was investigated.
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危险品化学品经营许可证（带存储）