CERAMICS INTERNATIONAL
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2022
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IF 5.532
Xue Guo,Junbin Lu,Jie Liu,Chunmiao Liu,Yanchun Tong,Jiao Li,Haibin Sun,Hui Peng,Shigang Wu,Yurun Feng,Hongyu Gong
By utilizing polymer-derived ceramics (PDCs) method and electrospinning technology, SiCN(Ni) fibers with 1 wt% nickel content at different calcination temperatures (1000–1300 °C) were synthesized. The properties of PDCs-SiCN(Ni) fibers were tested by XRD , SEM, TEM, Raman spectroscopy , XPS and vector network analyzer. The results showed that the addition of nickel acetylacetonate (NA) promoted the in-situ formation of CNTs and Ni 2 Si at high temperatures, which could adjust the impedance matching performance and improve the electromagnetic wave (EMW) absorption properties. The minimum reflection loss (RL) of SiCN(Ni) fibers was −47.55 dB (4.2 mm), and the effective absorption band (EAB, RL ≤ −10 dB) was 3.6 GHz (14.4–18 GHz) under the ultra-thin thickness of 1.24 mm.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
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IF 24.319
Dongxue Zhou,Xiangdong Xue,Xing Wang,Qingjie Luan,Ang Li,Liguo Zhang,Baozhen Li,Wenjun Dong,Ge Wang,Changmin Hou
Element doping is an excellent strategy to promote charge separation and reaction kinetics of photocatalyst, which plays significant role in accelerating the sustainable energy development process. Herein, Ni, In co-doped ZnIn 2 S 4 photocatalyst was prepared by a microwave-assisted solvothermal method. The rapid crystallization of ZnIn 2 S 4 resulted in partial In atoms substituted Zn atom during the formation of [ZnS] 4 layer. In doping in tetrahedral Zn sites increases the electron delocalization around In sites, hence reduces the electronic potential wells along Z axis. Ni doping in tetrahedral Zn sites decreases the negative charge on the S sits, which balances the H adsorption/desorption, further boosting the photocatalytic activity. As a result, Ni, In co-doped ZnIn 2 S 4 possess an optimal photocatalytic H 2 evolution property of 21.94 μmol·h −1 , which is nearly 1.8 and 6.1 times of In-ZnIn 2 S 4 (11.78 μmol·h −1 ) and ZnIn 2 S 4 (3.6 μmol·h −1 ).
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SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2022
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IF 7.305
Ziheng Wu,Zhaochun Ye,Shasha Shi,Yaobing Fang,Li Li,Wenhui Yuan
Shape stability and excellent photothermal conversion performance are critical for composite PCMs in the field of solar energy utilization. This study prepares a nickel and cobalt-based bimetal organic framework (Ni–Co-BTC) which is further employed as the supporting material for 1-octadecanol (OD). The flower-like Ni–Co-BTC with an interconnected network exhibits large specific surface area, pore volume , and appropriate pore size distribution , which is conducive to the encapsulation of OD (up to 70 wt%). In addition, TiN nanoparticles are added to enhance the photothermal conversion performance of composite PCM. Therefore, the obtained OD/Ni–Co-BTC/TiN composite PCM exhibits considerable thermal energy storage capacity (145.8 J/g) and remarkable photothermal energy conversion efficiency (up to 97.75%). Furthermore, the composite PCM has outstanding thermal stability and reliability, and the phase change enthalpy is reduced by only 1.7% after 100 cycles. Accordingly, the composite PCM shows a promising application potential in solar energy harvesting , conversion and storage.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Mengde Li,Xianyan Jiang,Junjie Liu,Qian Liu,Ningjie Lv,Ning Qi,Zhiquan Chen
In this paper, a Co/Ni bimetallic metal-organic framework (ZIF-67 @Ni-salicylate) is successfully synthesized through a two-step method. By increasing the reaction time to 48 h, the effect of the hydrothermal treatment on structure changes and electrochemical properties of ZIF-67 @Ni-salicylate is demonstrated. Electrochemical measurements show that the ZIF-67 @Ni-salicylate hydrothermal-treated with 48 h possesses a high specific capacitance of 1493 F g −1 at 1 A g −1 and simultaneously excellent cycle stability. Impressively, the capacitance retention rate can reach 86.8% even under a high current density of 40 A g −1 , which is much better than that in previous reports. Furthermore, an asymmetric supercapacitor (ASC) is assembled and two ASCs connected in series can light up a red LED for more than 30 min as demonstrated by the current-time curve. Our work will be useful for the preparation of high-performance supercapacitor electrode materials.
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JOURNAL OF POWER SOURCES
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2022
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IF 9.794
Ze Wang,Pei Shi,Qin Liu,Jingying Li,Yi Gan,Jia Yao,Jinghong Xia,Xin Liu,Xin Chen,Ke Qian,Xiang Liu,Lin Lv,Guokun Ma,Li Tao,Jun Zhang,Hanbin Wang,Houzhao Wan,Hao Wang
Alkaline nickel-zinc batteries have attracted more attention due to their inherent safety and high specific energy. However, the cycling stability of Ni–Zn batteries is still an urgent problem. Herein, we fabricate the Ni 12 P 5 @PANI core-shell structure by polyaniline cladding on the Ni 12 P 5 nanowires . The polyaniline not only effectively improves the specific capacity of Ni 12 P 5 , but also greatly enhances the cyclic stability. The optimized Ni 12 P 5 @PANI nanowires provide a specific capacity of 272.8 mAh g −1 at 1 A g −1 (189.2 mAh g −1 at 10 A g −1 , 69.4% retention rate) and long-life cycling (93% capacity retention after 1000 cycles at 10 A g −1 ). Moreover, the theoretical calculations indicate that the polyaniline is easy to polymerize on the surface of Ni 12 P 5 , and the lower formation energy verifies that the polyaniline shell layer can effectively promote the structural stability of Ni 12 P 5 , thus enhancing the cycle life. In addition, the assembled Ni 12 P 5 @PANI//Zn battery retains 112.3% capacity retention after 500 cycles at 3 A g −1 , and provides a high energy density of 287.9 Wh kg −1 and power density of 49.1 kW kg −1 (based on the mass of active substance). This work provides a feasible high-rate and durable cathode material for alkaline Ni–Zn batteries.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2022
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IF 3.898
Hongbin Shi,Qing Liu,Xiaofeng Dai,Teng Zhang,Yuling Shi,Tao Wang
The bimetallic nanoparticles compositing of Ni-rich core and Cu-rich shell (Ni/Cu NPs) were successfully synthesized by a liquid-phase thermal decomposition method. The content of copper and nickel in Ni/Cu NPs was controllable by adjusting the ratio of two metal precursors, copper formate (Cuf) and nickel acetate tetrahydrate (Ni(OAc) 2 ∙4H 2 O). Ni/Cu NPs were further anchored on graphene oxide (GO) to prepare a magnetic composite catalyst, called Ni/Cu-GO. The dispersibility of Ni/Cu NPs in solution was enhanced by GO anchoring to prevent the sintering and aggregation during the reaction process, thereby ensuring the catalytic and cycling performance of the catalyst. The catalytic transfer hydrogenation (CTH) reaction of nitroaromatics was investigated when ammonia borane was used as the hydrogen source. Cu dominated the main catalytic role in the reaction, while Ni played a synergistic role of catalysis and providing magnetic properties for separation. The Ni 7 /Cu 3 -GO catalyst exhibited the best catalytic performance with the conversion and yield of 99% and 96%, respectively, when 2-methyl-5-nitrophenol was used as the substrate. The Ni 7 /Cu 3 -GO catalyst also exhibited excellent cyclic catalytic performance with the 5-amino-2-methylphenol yield of above 90% after six cycles. In addition, the Ni 7 /Cu 3 -GO catalyst could be quickly recycled by magnetic separation. Moreover, the Ni 7 /Cu 3 -GO catalyst showed good catalytic performance for halogen-containing nitroaromatics without dehalogenation.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Bo Dai,Yong Ma,Shixuan Feng,Haowen Wang,Mingliang Ma,Jianxu Ding,Xunqian Yin,Tingxi Li
The development of microwave absorbing materials with strong absorption capacity, wide bandwidth and light weight has always been a topic of concern. Herein, one-dimensional (1D) M (Co, Ni)@polyaniline (PANI) nanochains (NCs) with adjustable thickness have been successfully synthesized by reducing the mental ions under a parallel magnetic field, pretreating metal nanochains with KH550 and pre-oxidization of aniline monomer. It is found that Co has a more favorable absorption width for electromagnetic waves (EMW) and Ni aims at the absorption intensity. Furthermore, the effect of metal elements on adjusting impedance matching is more significant than their magnetic loss for composites. The minimum reflection loss (RLmin) of CoP2 can be up to −73.16 dB at 4.63 mm and the effective absorption bandwidth (EAB) is 4.98 GHz at 2.17 mm, while those of NiP2 are −65.06 dB at 3.88 mm and 5.02 GHz at 2.05 mm. The increase of PANI content can significantly reduce the matching thickness. And the RLmin of CoP3 and NiP3 can reach −58.72 dB at 2.32 mm and −65.96 dB at 1.59 mm, respectively. The absorption mechanism reveals that the matching thickness of the quarter-wavelength determines frequency location. And high absorption intensity is attributed to the synergistic effects of impedance matching, conduction loss, polarization loss, and magnetic loss. This work provides a theoretical basis for designing PANI or other conducting polymers coating magnetic nanochains for electromagnetic absorbing materials with strong absorption capacity, wide bandwidth and light weight.
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PubMed
高影响因子
Catalysts
·
2022
·Vol. 12
·期 6
·606
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IF 4.501
Yadong Wang,Qing Hu,Ximing Wang,Yanpeng Huang,Yuanhao Wang,Fenghuan Wang
Methane reforming with carbon dioxide (DRM) is one promising way to achieve carbon neutrality and convert methane to syngas for high-value chemical production. Catalyst development with better performance is the key to its potential large-scale industrial application due to its deactivation caused by carbon deposition and metal sintering. Hence, a Ni/CeO2catalyst (Ni/CeO2-M) with higher CO2conversion and better stability is prepared, supported on CeO2precipitated via a novel microimpinging stream reactor. A series of ex-situ or in-situ characterizations, such as CO titration measurements, two-step transient surface reaction (two-step TSR), CO2and CH4temperature-programmed surface reaction (CO2-TPSR and CH4-TPSR), X-ray absorption fine structure (XAFS), and in-situ Raman spectroscopy study, were used to investigate its structure and mechanism. In contrast to Ni supported on commercial CeO2(Ni/CeO2-C), the Ni/CeO2-M catalyst with stronger lattice oxygen mobility and higher oxygen storage capacity enhances its CO2activation ability and carbon deposition. The Ni particle size of the Ni/CeO2-M catalyst decreased, and a higher oxidation state was obtained due to the strong metal–support interaction. Besides the reaction performance improvement of the Ni/CeO2-M catalyst, the novel microimpinging stream reactor could achieve catalyst continuous production with a high preparation efficiency. This work provides a novel method for the high-performance catalyst preparation for DRM reaction and its mechanism study gives a deep insight into high-performance catalyst development via bottom-up study.Keywords:dry reforming of methane;oxygen vacancy;Ni/CeO2catalyst
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TALANTA
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2022
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IF 6.556
Wei Huang,Yao Chen,Lingyan Wu,Mei Long,Zhifeng Lin,Qianqian Su,Fuli Zheng,Siying Wu,Huangyuan Li,Guangxia Yu
L-tryptophan (Trp) is an essential amino acid for humans and plays crucial roles in many metabolic functions. Trp levels can be used for diagnosing different kinds of metabolic disorders and the symptoms associated with those diseases. Herein, a novel, simple and sensitive sensor based on 3D peony-like bimetallic conductive MOFs (Co–Ni-MOFs) was fabricated for the electrochemical determination of Trp. The bimetallic conductive MOFs were synthesized by a facile one-pot hydrothermal process. On account of the synergy between the Ni 2+ and Co 2+ ions, the bimetallic Co–Ni-MOFs showed excellent electrochemical performance, including good conductivity, large effective surface areas, and high electrocatalytic reactivity toward the oxidation of Trp. Consequently, the Co–Ni-MOFs-modified electrodes obtained a wide linear range from 10 nmol L −1 to 300 μmol L −1 and a low detection limit of 8.7 nmol L −1 (S/N = 3) for Trp. Additionally, the prepared sensor also displayed high selectivity, long-term stability and reproducibility. Moreover, the proposed sensor was successfully applied to determine the levels of Trp in the plasma of mice after cadmium intoxication.
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CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Qi Wang,Jing Du,Yuan-Yuan Ma,Xiao-Yu Yin,Ze-Yu Tian,Zhan-Gang Han
Electrocatalytic hydrodechlorination (EHDC) provides a promising approach to efficiently remove the halogenated organic pollutants in water. Herein, a kind of noble-metal-free three-dimensional (3-D) hierarchical nickel-tungsten carbide (Ni-WC) heterostructure supported on nickel foam (NF) (Ni-WC/NF) was fabricated via the in-situ hydrothermal growth and annealing treatment of Ni,W-rich polyoxometalate {Ni 54 W 72 }. Featuring self-supported 3-D hierarchical skeleton structures and abundant Ni-WC interfaces, Ni-WC/NF exhibited high-efficient EHDC performance towards 4-chlorophenol (4-CP) with 100 % conversion efficiency in 3 h, large reaction rate constant of 2.2 × 10 -2 min −1 and high current efficiency of 13.9 %, which is comparable to the-state-of-the-art Pd-based catalysts. The active atomic hydrogen (H*) generation kinetics and the interactions of Ni-WC heterostructure with 4-CP/phenol were evaluated. DFT calculations demonstrated that the coverage of 4-CP determines the EHDC efficiency, the Ni-WC heterostructure optimizes the electronic structure of Ni, enhances the adsorption of 4-CP and facilitates the desorption of phenol, thus promoting EHDC performance. This work provides an efficient noble-metal-free catalyst for enhanced electrochemical dechlorination in organic-pollutant treatment.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
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IF 4.831
Yijian Zhao,Xin Wang,Yanqiang Chen,Qinzhi Wang,Zhiyi Yao,Li Wang
Surface-enhanced Raman scattering (SERS) enables food contaminants monitoring become facile and efficient. Herein, a facile strategy of integrating three-dimensional Ni form with Co/Ni bimetal-organic frameworks combining Ag nanoparticles via electrochemical synthesis method was proposed to develop a high-performance SERS substrate (CoNi-ZIFs@Ag@NF) for efficient detection of tetracycline. The flexible Ni foam (NF) acted as scaffold which can contribute to dramatically enhancing intrinsic electrical conductivity and endowing prepared substrate with high stability and uniform distribution of Ag nanoparticles. Furthermore, the pre-concentration effect of CoNi-ZIFs@Ag@NF for target molecules enhanced SERS performance dramatically. Besides, tetracycline was sensitively detected using CoNi-ZIFs@Ag@NF with low limit of detection (1.0 × 10 -11 M) and wide linear detection range (10 -10 – 10 -5 M) in aqueous solution. Also, the satisfactory recovery (94.45 – 114.25 %) was realized with less than 6.78 % of RSD in real samples. This method would provide a potential and high-performance substrate for SERS monitoring of tetracycline in food and environment.
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INDUSTRIAL CROPS AND PRODUCTS
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2022
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IF 6.449
Yan-qing Song,Sonil Nanda,Wen-jie Cong,Jie Sun,Guo-hua Dong,Aneta Magdziarz,Zhen Fang,Ajay K. Dalai,Janusz A. Kozinski
Cotton stalk was gasified to produce H 2 with Ni-La based catalysts in subcritical and supercritical water. Approximately 90% H 2 yield was obtained under optimized conditions (360 °C, 0.5 g Ni-La catalyst loading, 0.5 g biomass and 10 min) by an orthogonal design with Ni-La/spent bleaching clay (SBC) materials. In addition, the H 2 yield of rice and wheat straw increased by 41.5 and 39.5 times, respectively at optimized conditions. It was found that the activity of Ni-La materials supported on SBC ash and Al 2 O 3 was similar, with H 2 yields of 108.3% and 115.1% at 380 °C, respectively in 5 min. SBC ash provided a high specific surface area (94.4 m 2 /g) for the Ni-La catalyst. La-promoted Ni/SBC (0.19 mmol/g) had a stronger acidity than Ni/SBC (0.16 mmol/g). Ni-La/SBC had a broad reduction peak, indicating the uniform dispersion of Ni on the support. Ni-La/SBC materials not only realized the reuse of SBC but also effectively promoted the hydrothermal gasification of agricultural wastes .
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危险品化学品经营许可证（带存储）