CHEMOSPHERE
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2020
·
IF 5.778
Zhiyong Zhang,Yi-bo Hu,Wenjuan Ruan,Huiying Ai,Baoling Yuan,Ming-Lai Fu
2,4-dichlorophenol (2,4-DCP) is a typical chlorophenol that has been widely used in industrial production and caused serious pollution to the environment. In this study, the performance of Fe/Ni bimetallic nanoparticles supported on polystyrene cation exchange resin (Fe/Ni-D072) to remove 2,4-DCP was evaluated. The effects including the doping amount of Ni, the dosage of Fe/Ni-DCP, the initial concentration of 2,4-DCP, and pH value of the solution on the removal efficiency were also investigated. The results showed that when the initial concentration of 2,4-DCP was 20 mg/L and pH = 7.3, 90% of 2,4-DCP could be dechlorinated by Fe/Ni-D072 (Ni% = 30 wt%, dosage: 6.7 g/L) after 12 h reaction. The dechlorination process followed a pseudo-first-order model, and the reaction constant was 0.252 h −1 . In addition, the effects of humic acid and common coexisting ions on dechlorination were studied. The results showed that humic acid with a low concentration (5 mg/L) and CO 3 2− restrained the degradation of 2,4-DCP. The dechlorination products of 2,4-DCP were identified by HPLC and the result showed phenol was the main product with a slight amount of 2-CP as the dechlorination intermediate, and 4-CP was barely detected. These results suggest that Fe/Ni-D072 was a promising catalytic material for the removal of chlorophenol and has great application prospects in groundwater remediation .
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PubMed
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2020
·Vol. 23
·期 1
·2000913
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IF 3.217
Enyang Liu,Liyuan Wang,Xiaoli Yin,Jinhui Hu,Sirong Yu,Yan Zhao,Wei Xiong
Herein, a superhydrophobic Ni coating is prepared on 316L stainless steel by electrodeposition and low energy modification with tetradecanoic acid. After 20 min of electrodeposition with a current density of 8 A dm −2 , a Ni coating with micro–nano dual-scale structures is obtained. The coating becomes superhydrophobic with a water contact angle (WCA) of 160.4° and a sliding angle (SA) of 8.3° after being immersed in the tetradecanoic acid solution (5 g L −1 , 12 h). A two-level structure model is established for explaining the effect of morphology on the wettability of the coating. The WCA value of the superhydrophobic Ni coating retains above 150° after being exposed in outdoor environment for 6 months and in flowing environment for 7 days. In addition, the coating still shows superhydrophobicity after 9 times of mechanical abrasion test, 12 h of acid soaking (pH = 1), and 16 h of heat treatment in 200 °C. Moreover, the coating improves the corrosion resistance of the steel substrate. This superhydrophobic Ni coating provides a simple method to prevent stainless steel from corrosion. And the theoretical calculation of the two-level model can provide an innovative strategy for designing the structure of the superhydrophobic coating.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2020
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IF 5.774
Daofei Lv,Zewei Liu,Feng Xu,Houxiao Wu,Wenbing Yuan,Jian Yan,Hongxia Xi,Xin Chen,Qibin Xia
The separation of C 2 H 6 and C 3 H 8 from CH 4 is extremely important in the petrochemical industry, but the separation technology is dominated by an energy-intensive and cost-intensive process of cryogenic distillation. With lower energy consumption and cost investment, adsorptive separation technology shows great potential for the purification of natural gas. Here, we prepared a Ni-based metal-organic framework CTGU-15 and investigated its performance for the separation of light alkanes. Results show that CTGU-15 has super-high C 3 H 8 uptake (12.13 mmol/g) and relatively low CH 4 uptake (0.40 mmol/g) at 298 K and 100 kPa. The reason why CTGU-15 shows super-high C 3 H 8 uptake was studied by comparing the pore textural properties of CTGU-15 and other benchmark adsorbents. Additionally, computational simulations were used to explore the nature of the interaction of the C 3 H 8 gas within CTGU-15. The adsorption selectivities of C 3 H 8 /CH 4 and C 2 H 6 /CH 4 on CTGU-15 are 170.7 and 5.2, respectively. Breakthrough experiments show that CTGU-15 can achieve the adsorptive separation of CH 4 /C 2 H 6 /C 3 H 8 mixtures. Importantly, CTGU-15 can maintain the stability of the framework after the heat treatment at <770 K, five adsorption-desorption cycles and exposure to 58% RH for 3 days. This work indicates that CTGU-15 is a promising adsorbent for CH 4 /C 2 H 6 /C 3 H 8 separation.
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高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 8
·5086-5096
·
IF 12.732
Dawei Liu,Yunchen Du,Ping Xu,Fengyuan Wang,Yahui Wang,Liru Cui,Honghong Zhao,Xijiang Han
Hierarchical microstructures are playing important roles in the design and fabrication of high-performance microwave absorbing materials (MAMs) owing to their unique advantages. In this work, a series of special “double-hierarchical” N-doped carbon nanotubes wrapping waxberry-like Ni@C microspheres (NC@NCNTs) have been rationally designed and successfully fabricated by two-step pyrolysis processes, where the loading amount of NCNTs on the waxberry-like Ni@C microspheres can be easily modulated by changing the dosage of melamine. Benefiting from sufficient attenuation ability and good impedance matching, NC@NCNTs-2, whose relative carbon content is 51.1 wt%, exhibits the best reflection loss (RL) characteristics among this series of composites, including the minimum RL intensity of −41.5 dB and an effective absorption bandwidth of 5.2 GHz with an absorber thickness of only 1.7 mm. This performance is superior to that of many homologous Ni/C composites reported previously. The investigation on EM properties indicates that the unique “double-hierarchical” architecture of NC@NCNTs can not only create stronger dipole orientation and interfacial polarization relaxation, but can also result in higher conductive loss as well as extra multiple reflection effects for incident electromagnetic waves. We believe that these results will provide some inspirations and pathways for the production of high-performance MAMs with senior microstructures in the future.
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高影响因子
CARBON
·
2021
·
IF 9.594
Panpan Zhou,Xiaokang Wang,Zhi Song,Meng Wang,Wentao Huang,Mingxun Yu,Lixi Wang,Qitu Zhang
Ordered mesoporous carbon (OMC) has been regarded as a promising carbonaceous material for microwave absorption (MA) owing to its high specific surface area, sufficient ordered mesoporous nanostructures and easy decoration. However, its development in MA performance is seriously hampered by its shortcomings of lacking magnetic loss and poor impedance matching. Herein, a series of multi-dimensional ternary OMC/SiO 2 @Ni composites with hierarchical nanostructure (zero-dimensional (0D) Ni nanoparticles and three-dimensional (3D) OMC/SiO 2 framework) is successfully prepared via a self-assembly method, an in situ synthesis, and followed by a calcination treatment. By adjusting the calcination temperature and Ni nanoparticle content, OMC/SiO 2 @Ni composites with different graphitization degree, Ni nanoparticle size and magnetic properties can be easily obtained. Remarkably, OMC/SiO 2 @Ni0.5-700 composite exhibits an exceedingly strong reflection loss (RL) value of −62.2 dB and a broad effective absorption bandwidth (RL ≤ −10 dB) of 8 GHz (almost covers X and Ku bands) with a layer thickness of only 2.5 mm. Such fabulous MA performance comes from a synergy between the well-designed hierarchical ternary nanostructure and improved impedance matching. This work provides an insight for rational structure design and multi-component loss mechanism of lightweight MA material , which shows great potential in practical applications.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 9
·4236-4245
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IF 3.591
Jia Zhang,Jian Yang,Junying Tian,Hailong Liu,Xuemei Li,Weiguo Fang,Xun Hu,Chungu Xia,Jing Chen,Zhiwei Huang
The synthesis of useful amines from bio-based carbonyl compounds is highly desired owing to their mild reaction conditions and green sustainability. The reductive amination of bio-furfural-derived 2-hydroxytetrahydropyran (2-HTHP) to high-value-added 5-Amino-1-pentanol (5-AP) was carried out over efficient Ni–Al2O3 catalysts prepared by a co-precipitation method. Among the Ni–Al2O3 catalysts with different Ni loadings (0–100 wt%) tested, the 50Ni–Al2O3 catalyst exhibited the highest 5-AP yield of 91.3% under mild conditions of 60 °C and 2 MPa H2. This catalyst also presented good stability during a 150 h time-on-stream without appreciable deactivation. Characterization results showed that the 50Ni–Al2O3 catalyst exhibited small Ni0 nanoparticles (5.5 nm), a high reduction degree (up to 95%), and a large amount of strong Lewis acid sites. The cooperative catalysis of the strong Lewis acid sites and highly dispersed metallic Ni sites is suggested to play an important role in achieving high efficiency in 2-HTHP reductive amination.
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高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Ningyu Chen,Jintang Zhou,Zhengjun Yao,Yiming Lei,Ruiyang Tan,Yuxin Zuo,Wenjian Zheng,Zibao Jiao
The electromagnetic materials are featured by good magnetic permeability and dielectric constant characteristics, which are of significant importance in solving the pollution problem of electromagnetic. In this study, after the complete of the use of sol-gel method, argon gas was then introduced for calcination , and eventually a new type of MWCNTs/Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 composites was synthesized after the above mentioned procedures. The synthesized MWCNTs were able to be adsorbed on the surface of Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 and could form a good conductive work of 3D. Also, the effect of additional MWCNTs on microwave absorption properties of MWCNTs/Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 composites were also observed in this study. The results indicate that the additional MWCNTs function to significantly improve the microwave absorption property of MWCNTs/Ni 0.5 Zn 0.5 Nd 0.04 Fe 1.96 O 4 . Through altering the amount of MWCNTs, the microwave attenuation performance and impedance matching coefficient of this electromagnetic materials can be effectively improved. The S2 sample presented a minimum reflection loss of −35.05 dB when its thickness reached 1.6 mm, meanwhile, the effective absorption bandwidth achieved 4.55 GHz. The prepared composites perform well in microwave absorption, which can attribute to the reasonable ratio of composites as well as its interaction with both of the magnetic and dielectric components. This research paved the way for novel ideas to be put in the electromagnetic absorption materials with high-efficient.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2020
·
IF 4.939
Ting Feng,Fang Wang,Yanjie Xu,Meijia Chang,Xiujuan Jin,Yulin zhou,Jinhua Piao,Jianfei Lei
Transition metal phosphides (TMPs) have attracted considerable attention as an advanced electrocatalyst for hydrogen evolution reaction (HER). Nevertheless, the catalytic efficiency of single-component TMPs is still restricted that cannot endure long-term running and easy to be corroded especially under harsh conditions. In this work, a multicomponent electrocatalyst combined with CoP/Ni 2 P heteronanoparticles and Co/Ni single-atom active sites (denoted as N–C@CoP/Ni 2 P) is rational designed and prepared. The obtained N–C@CoP/Ni 2 P electrode material exhibits enhanced performance with the overpotential of 153 mV at 10 mA cm −2 , and the small Tafel value of 53.01 mV dec −1 in 0.5 M H 2 SO 4 , and a satisfied result is obtained in basic media as well. The outstanding HER performance is mainly benefiting from the synergistic effect between CoP and Ni 2 P, and the highly catalytic faction of atomic Co/Ni dual sites. Furthermore, a powerful conductive network fabricated by N-doped carbon skeleton and in-situ grown CNTs improves the conductivity of catalyst. Such a stereoscopic 3D nanostructure is also facile to accelerate the shuttle of electrons and ions.
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高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Zhiyong Huang,Lijun Fan,Nianjun Hou,Tian Gan,Juanjuan Gan,Yicheng Zhao,Yongdan Li
Ni–Ce 0.8 Pr x Sm 0.2-x O 2-δ (x = 0–0.15) is studied as an anode of solid oxide fuel cells. The doping of Pr facilitates the chemical oxidation of CH 3 OH on the ceramic phase because the strength of Pr–O bond is weaker than that of Ce–O bond. With the addition of Pr, the electronic conductivity of the ceramic phase increases in an oxidizing atmosphere but decreases in a reducing atmosphere. The electrochemical conductivity relaxation results indicate that Pr improves oxygen surface exchange coefficient and oxygen chemical diffusion coefficient of Ce 0.8 Sm 0.2 O 2-δ simultaneously. The doping of Pr shows negligible influence on the performance of the cell fed with H 2 due to the high reactivity of H 2 . However, the maximum power density of the cell with methanol as the fuel increases significantly with the addition of Pr in the anode, demonstrating the high importance of the oxygen activity of the anode when a less active fuel is used. A Ce 0.8 Sm 0.2 O 2-δ -carbonate electrolyte-supported single cell with Ni–Ce 0.8 Pr 0.1 Sm 0.1 O 2-δ anode shows a maximum power density of 792 mW cm −2 at 650 °C with methanol as the fuel.
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高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2020
·
IF 2.717
Hengdong Ren,Xiangfeng Shu,Zhenying Liu,Jun Zhou,Jialin Ma,Yin Liu,Ling Bing Kong,Fanfei Min,Xichen Shi,Jinjin Han,Xin Yang
A facile in-situ strategy has been developed to synthesize lightweight ultrathin coal-derived carbon-nickel composites (CDC/Ni) with superior microwave absorption performances using anthracite as raw material for the first time. The phase structure and chemical composition were investigated by X-ray diffractometry (XRD) and X-ray photoelectron spectroscopy (XPS). Field emission scanning electron microscopy (FESEM) images indicate that the surface of the composite is covered with layered stripes and a large number of macropores. Transmission electron microscopy (TEM) images show Ni nanoparticle size from 30 to 80 nm. Since the introduction of magnetic nickel increases the magnetic loss and improves impedance matching, the CDC/Ni magnetic composites exhibit excellent microwave absorption performance. Specifically, a minimum reflection loss of −62.51 dB is observed at 15.76 GHz, with an effective absorption bandwidth of 4.08 GHz, while the thickness is only 1.31 mm. The superior microwave absorption performance is mainly attributed to the suitable conductivity of CDC. The presence of the nickel nanoparticles has enabled to achieve impedance matching. Besides, the special morphology and oxygen-containing functional groups also bring out various loss mechanisms. Therefore, such CDC/Ni composites could be potential lightweight high performance microwave absorbing materials. In addition, our strategy is a cleaner and more efficient process to utilize coals.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xue Li,Mingli Fan,Dandan Wei,Maoguo Li,Yinling Wang
Pristine metal organic frames (MOFs) have emerged directly as the electrocatalysts for oxygen evolution reaction (OER). However, the OER performance needs further improvement and the real active sites remain exclusive. Herein, the effect of ligands on the performance of MOFs and the real active sites of each MOFs were explored. Specifically, three Ni based metal organic frames (Ni-MOFs) with different ligands including formic acid (FA), 1,4-benzenedicarboxylic acid (BDC) and 1,3,5-benzenetricarboxylic (BTC) were prepared by a solvothermal method . The morphology, specific surface area, porosity, wettability, electrochemically surface area (ECSA) of each Ni-MOFs were tested. However, none of them could be well correlated to the OER performance except the content of Ni(OH) 2 on the surface from XPS test. Moreover, the OER performance of each Ni-MOF could be improved by cyclic voltammetry (CV) and chronopotentiometry (CP). The morphology and composition of each Ni-MOF before and after electrochemical activation further reveal the real active sites of three Ni-MOFs investigated here were Ni(OH) 2 . These results were expected to provide useful information for designing more excellent OER electrocatalysts based on MOFs.
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高影响因子
CHINESE CHEMICAL LETTERS
·
2020
·
IF 4.632
Guangmeng Qu,Xixi Zhang,Guotao Xiang,Yunrui Wei,Jiangmei Yin,Zonghua Wang,Xiaoli Zhang,Xijin Xu
Nano-polyhedral NiSe 2 /CoSe 2 (Ni-Co-Se) with hollow architectures are synthesized by selenizing the precursors of Ni-Co bimetallic hydroxides that are directly derived from ZIF-67. The as-fabricated Ni-Co-Se electrodes exhibit high specific capacitance of 1668 F/g at 1 A/g accompanying with outstanding rate capability (about 82.8% retention of the initial capacity at 20 A/g). The corresponding Ni-Co-Se//AC all-solid-state hybrid supercapacitors are assembled by directly using the Ni-Co-Se on carbon fabric as the positive electrode, which deliver high energy density and power density (38.5 Wh/kg at 802.1 W/kg, 32.0 Wh/kg at 8008.8 W/kg), excellent cyclic stability (82.3% retention after 5000 cycle) and robust mechanical flexibility (no obvious attenuation at bending to different angles). This work will provide a new and smart route for constructing transition metal selenides for supercapacitor devices.
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高影响因子
危险品化学品经营许可证（带存储）