JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2020
·Vol. 32
·期 21
·25656-25667
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IF 2.22
Wang Huiya,Wu Xiaofen,Wang Qiuyue,Chen Siyi,Chen Gang,Dong Chengjun,Guan Hongtao
Efficient microwave absorbing materials have been drawn extensive attention. Herein, biomass porous carbon (BPC) from pine pollen has been obtained through KOH carbonization. In order to tune the microwave absorption, NiO has been composited with the as-prepared BPC with different contents. Despite the high specific surface area for the BPC activated at 600 °C, it exhibits poor microwave absorption properties as pure NiO. In contrast, the BPC/NiO composite with proper nickel precursor (0.1:1.0) has the maximum reflection loss ( RL ) of − 52.6 dB at 10.0 GHz and the effective absorption bandwidth ( RL < − 10 dB) reaches up to 4.9 GHz (from 7.8 to 12.7 GHz) when the absorber thickness is 3 mm. Three-dimensional porous architecture, interfacial polarization and their related relaxation from defects and interfaces cooperatively favor the impedance matching and strong EM wave attenuation capacities, which brings about multiple absorption mechanisms of the microwave. The present study not only provides a facile route to prepare porous carbon, but also sheds light on a new strategy in constructing BPC/NiO composites for excellent microwave absorption.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Sustainable Energy & Fuels
·
2022
·Vol. 6
·期 21
·4938-4947
·
IF 6.813
Weiwen Chen,Ziyu Geng,Shicong Zhu,Zenghui Qiu,Xin Zhang,Haijun Xu
Exploration of new MXene-based materials with excellent electrical conductivity and a high redox-active surface as high electrochemical performance supercapacitor electrodes is a very promising field. However, it remains challenging to have electrode materials that feature ultrahigh specific capacitance. In this work, NiO nanoflowers uniformly grow onto a V4C3TX substrate to form a core–shell hierarchical V4C3TX@NiO heterostructure, and then the heterostructure is incorporated into a 3D interconnected porous hydrogel via a hydrothermal graphene oxide (GO)-gelation method at low temperatures. Due to the synergistic effect among each components as well as the significant prevention of the aggregation of V4C3TX, the free-standing V4C3TX@NiO-reduced graphene oxide (RGO) heterostructured hydrogel electrodes exhibit an ultrahigh specific capacitance of up to 1009.5 F g−1 at 1 A g−1, in comparison to those of V4C3TX@NiO (665.3 F g−1) and V4C3TX (184 F g−1), excellent cycling stability (capacity retention rate is 97.4% for the device after 10 000 cycles at 10 A g−1), and a maximum energy density of 61.13 W h kg−1 at a power density of 526.32 W kg−1. This work highlights the unique potential of V4C3TX-based heterostructured hydrogels as inspired electrode materials for low-cost supercapacitor devices.
研究领域:
材料科学
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电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2016
·
IF 2.435
Xiaowei Li,Ruixue Chen,Huidong Sui,Xiaoxian Yuan,Meng Li,Kun Yang,Ling Li,Wenming Zhang,Yucang Zhang
Flower-like NiO nanoparticles was successfully synthetized by homogeneous precipitation. A novelty modified (CH 3 ) 4 N) 2 S/((CH 3 ) 4 N) 2 S n electrolyte was introduced in solar cell successfully and NiS was used as the counter electrode. Moreover, CdSe sensitized p-type NiO was synthesized by chemical bath deposition (CBD) in a precursor solution to ensure the nanosized flower-like NiO films obtain a better uniformity and high penetration. Meanwhile, a series of parallel experiment were designed to investigate the effect of different CdSe deposition layers on the photoelectric characteristic of the cell. The result showed that when the film was eight layers, the maximum efficiency of 1.06% had been achieved, with a significantly open circuit voltage ( V oc ) of 0.755 V, a fill factor (ff) of 0.27% and a short circuit current density ( J sc ) of 5.21 mA cm −2 .
研究领域:
材料科学
·
光伏技术
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纳米技术
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2016
·Vol. 33
·期 10
·764-770
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IF 4.367
Qian Li,Gang Huang,Dongming Yin,Yaoming Wu,Limin Wang
1D nanostructured metal oxides with porous structure have drawn wide attention to being used as high-performance anode materials for lithium-ion batteries (LIBs). This study puts forward a simple and scalable strategy to synthesize porous NiO nanorods with the help of a thermal treatment of metal-organic frameworks in air. The NiO nanorods with an average diameter of approximately 38 nm are composed of nanosized primary particles. When evaluated as anode materials for LIBs, an initial discharge capacity of 743 mA h g −1 is obtained at a current density of 100 mA g −1 , and a high reversible capacity is still maintained as high as 700 mA h g −1 even after 60 charge–discharge cycles. The excellent electrochemical performance is mainly ascribed to the 1D porous structure.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 3
·037504
·
IF 4.386
Tiantian Qiu,Na Luo,Mengmeng Guo,Haijie Cai,Zhixuan Cheng,Jiaqiang Xu
Constructing porous structure has proved to be an effective strategy to improve the gas sensing properties of metal oxide semiconducting materials. In this work, high-performance hydrogen sulfide (H2S) gas sensing material with porous structure were synthesized by growing nickel oxide (NiO) on vanadium trioxide (V2O3) seeds. Morphology and structure characterizations reveal that the novel three-dimensional (3D) nanoflowers are formed by self-assembling two-dimensional (2D) porous nanosheets with high surface area and abundant active sites. Compared with pristine NiO, the sensing performance of V2O3-NiO (VN8, VN7, VN6) with different ratios of V3+: Ni2+ is enhanced due to their porous structure. Among them, VN7 sensor shows excellent sensing properties at 200 °C. The response to 500 ppb H2S can reach 65, which increases as high as 2.2 times compared with the pristine NiO sensor. The response time to 500 ppb H2S is further decreased from 13 s of the pristine NiO sensors to 8 s of VN7 sensor. The VN7 sensor also shows a wide linear range from 20 ppb to 500 ppb, high selectivity, good repeatability, long-term stability, moisture resistance and low detection limit (20 ppb), indicating its potential candidate for ppb-level H2S detection in complex environment of industrial mine.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2019
·
IF 4.084
Peng Wang,Xiao Zhang,Yan Wei,Ping Yang
Ni/NiO nanoparticles (NPs) were encapsulated in one dimensional (1D) graphitic nanofibers using a two-step calcination route. The precursor fibers obtained by electrospinning were heated in air at a low temperature firstly, followed by calcination at high temperature in Ar. With changing the amount of Ni precursors and preparation conditions, the morphology of resulting samples were adjusted from porous nanofiber to nanotube-loaded bulky material. The sizes and distribution of Ni/NiO NPs also changed. These NPs were in and on the nanofibers or located on the top of nanotubes. Electrochemistry test results indicate that resulting sample revealed enhanced electrocatalytic hydrogen evolution reaction (HER) when the precursor contained 0.5 mmol Ni. In an alkaline medium , the current density of samples could reach up to 280 mA cm −2 . This is ascribed to the homogeneous distribution of Ni/NiO NPs and the porous structure of nanofibers with a large surface area of 251 m 2 /g. In contrast, the HER performance of nanotube-loaded bulky material get worse due to the disadvantage of specific surface area .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Peijiang Liu,Vincent Ming Hong Ng,Zhengjun Yao,Jintang Zhou,Yiming Lei,Zhihong Yang,Hualiang Lv,Ling Bing Kong
In this work, two novel flowerlike NiO hierarchical structures, rose-flower (S1) and silk-flower (S2), were synthesized by using a facial hydrothermal method, coupled with subsequent postannealing process. Structures, morphologies, and magnetic and electromagnetic properties of two NiO structures have been systematically investigated. SEM and TEM results suggested that S1 had a hierarchical rose-flower architecture with diameters in the range of 4–7 μm, whereas S2 exhibited a porous silk-flower architecture with diameters of 0.7–1.0 μm. Electromagnetic performances indicated that the NiO hierarchical structures played a crucial role in determining their dielectric behavior and impedance matching characteristic, which further influenced the microwave attenuation property of absorbers based on them. Due to its hierarchical and porous architectures, S2 had higher microwave absorption performances than S1. The maximum RL value for sample S2 can reach −65.1 dB at 13.9 GHz, while an efficient bandwidth of 3 GHz was obtained. In addition, the mechanism of the improved microwave absorption were discussed in detail. It is expected that our NiO hierarchical structures synthesized in this work could be used as a reference to design novel microwave absorption materials.
研究领域:
材料科学
·
电磁学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 19
·5776-5784
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IF 5
Huichao He,Yuli Xiong,Hao Xiao,Tao Han,Yujie Guo,Jiahe Li,Qiwen Chen,Yunhuai Zhang,Jinyan Du,Gaili Ke
Water oxidation is an endothermic reaction; BiVO4-based photoanodes with good photothermal and catalytic properties would be propitious to achieve efficient water oxidation in theory. Herein, NiO/amorphous carbon/BiVO4 (NiO/C/BiVO4) and CoOx/amorphous carbon/BiVO4 (CoOx/C/BiVO4) films were prepared by a facile candle flame roasting approach, and further investigated as photoanodes for solar water oxidation. Compared to BiVO4 and C/BiVO4 photoanodes, better water oxidation performance was achieved on the CoOx/C/BiVO4 and NiO/C/BiVO4 photoanodes. At 1.23 V vs. RHE, the water oxidation photocurrent of the CoOx/C/BiVO4 and NiO/C/BiVO4 photoanodes was 2.32 and 2.41 times higher than that of the BiVO4 photoanode, respectively. The water oxidation activity on the CoOx/C/BiVO4 and NiO/C/BiVO4 photoanodes can be well maintained in the range of 84–87% after 120 min of constant reaction, which is higher than that on the BiVO4 photoanode (43% activity retained). The NiO/C/BiVO4 and CoOx/C/BiVO4 photoanodes having higher water oxidation performance can be attributed to the following integrated effects. (1) The p–n heterojunction effect of NiO/BiVO4 and CoOx/BiVO4 drives the directional transfer of holes to CoOx or NiO and weakens the carrier recombination on BiVO4. (2) Amorphous carbon, CoOx and NiO absorb and convert the long wavelength light (λ > 510 nm) into heat to improve the co-catalysis performance of CoOx and NiO, and enable the NiO/C/BiVO4 and CoOx/C/BiVO4 photoanodes for efficient water oxidation. The present work provides two effective BiVO4-based photoanodes for photothermal-enhanced water splitting, which could inspire the design and development of similar materials for photothermal-enhanced solar water splitting.
研究领域:
材料科学
·
能源化学
·
光催化
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纳米技术
·
表面工程
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Fen-Ying Kong,Hui-Yu Zou,Meng Xiong,Jia-Dong Zhang,Wei Wang,Wei-Wei Zhao
Herein, we describe a customized approach for facile preparation of three-dimensional (3D) NiO nanoflakes (NFs)/carbon fiber meshwork (CFM) and its validation as a common photocathode matrix for photoelectrochemical (PEC) bioanalysis , which to our knowledge has not been reported. Specifically, 3D NiO NFs/CFM was fabricated by a sequential liquid phase deposition and annealing process, which was then characterized by scanning electron microscopy, X–ray photoelectron spectrum, UV–vis absorption spectra and N 2 adsorption-desorption measurement. Sensitized by BiOI and incorporated with an alkaline phosphatase (ALP)/tyrosinase (TYR) bi-enzyme cascade system, a sensitive split-type cathodic PEC bioanalysis for the determination of ALP was achieved. This method can detect ALP concentrations down to 3 × 10 −5 U L −1 with a linear response range of 0.001–10 U L −1 . Moreover, this proposed system exhibited good selectivity , stability and excellent performance for real sample analysis. This research features the facile preparation of 3D NiO NFs/CFM that could acts as a universal matrix for photocathodic analysis, and is envisioned to stimulate more effort for advanced 3D photocathode for PEC bioanalysis and beyond.
研究领域:
材料科学
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分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 33
·11705-11712
·
IF 4.099
Cong-Cong Shen,Ya-Nan Liu,Xin Wang,Xiao-Xiang Fang,Zhi-Wei Zhao,Nan Jiang,Liu-Bo Ma,Xiao Zhou,Tuck-Yun Cheang,An-Wu Xu
Metal–organic framework (MOF)-based materials possess numerous attractive characteristics; however, the application of MOF-based photocatalysts in the area of visible-light photocatalytic H2 evolution is still in its infancy. Herein, we develop a series of novel UiO-66-NH2-based composites with embedded NiO nanoparticles via solvothermal treatment and subsequent calcination. Their characterizations demonstrate intimate lattice-level contacts between UiO-66-NH2 photocatalysts and NiO nanoparticles. By optimizing each component, even without noble metal loading, the U6N-NiO-2 sample (the weight ratio of NiO to U6N-NiO-2 is theoretically calculated to be ca. 10 wt%) with 15 mg eosin Y as a sensitizer causes an enhanced H2 generation rate of 2561.32 μmol h−1 g−1 under visible-light irradiation using TEOA as a sacrificial reagent; furthermore, its corresponding quantum efficiency is as high as 6.4% at 420 nm. The H2 evolution activity of U6N-NiO-2 is about 5 times higher than that of the UiO-66-NH2 photocatalyst (denoted as U6N) and 23 times higher than that of U6N-NiO-2 without sensitizer. It is demonstrated that the high efficiency originates from the visible-light generated electrons of eosin Y and UiO-66-NH2, the efficient separation of carriers by the cascaded band structure and more negative CB of NiO as well as the good dispersion of NiO nanoparticles on the octahedral skeleton. This study provides new insights for the design of MOF-based materials without noble metal loading for visible-light photocatalytic H2 evolution.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2016
·
IF 2.76
Shutao Wang,Cong Wang,Guijuan Wei,Huaqing Xiao,Ning An,Yan Zhou,Changhua An,Jun Zhang
In this work, NiO nanosheets have been successfully synthesized via a facial hydrothermal route and it was found to be an excellent catalyst for non-enzymatic glucose sensory application. The NiO nanosheets in fcc structure were examined by transmission electron microscopy (TEM), field emission scanning electron microscopy(FESEM), X-ray diffraction (XRD) and selected area electron diffraction (SEAD). The thickness of NiO nanosheets were found to be 40–50 nm. This catalyst was then dropcasted on a glassy carbon electrode (GCE) for glucose sensory purposes. The electrochemical measurements were undertaken using both voltammetric method and amperometric method. The former offer a wide concentration range for glucose (up to 2.2 mM) but with relatively low sensitivity, whereas the latter showed excellent sensitivity with 400.29 μA mM −1 cm −2 and 1 μM detection limit. Thus the as-synthesized NiO nanosheets demonstrated potential application in non-enzymatic sensory of glucose.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xingyu Xiao,Xinran Zhou,Junhao Ma,Yongheng Zhu,Xiaowei Cheng,Wei Luo,Yonghui Deng
Semiconducting metal oxides have attracted increasing attention in various fields due to their intrinsic properties. In this study, a facile solvent evaporation-induced multicomponent co-assembly approach coupled with a carbon-supported crystallization strategy is employed to controllably synthesize crystalline mesoporous nickel oxide-doped tungsten oxides in an acidic THF/H2O solution with poly(ethylene oxide)-b-polystyrene diblock copolymers (PEO-b-PS) as the structure-directing agent, tungsten(VI) chlorides as WO3 precursors, and Ni(AcAc)2 as the NiO precursor. The obtained materials possess a face-centered cubic mesoporous structure, large pore size (∼30 nm), high surface area (30–50 m2 g–1), large pore volume (0.15–0.19 cm3 g–1), and ultralarge pore windows (12–16 nm) connecting adjacent mesopores, and the mesoporous WO3 framework was decorated by ultrafine NiO nanocrystals. Due to their well-connected porous structure and high surface areas with rich WO3–NiO interfaces, the composite materials exhibit superior gas sensing performance with an ultrafast response (∼4 s), high sensitivity (Ra/Rg = 58 ± 5.1), and selectivity to 50 ppm H2S at a relatively low working temperature (250 °C). The chemical mechanism study reveals complicated surface reactions of WO3/NiO-based gas sensors, and SO2, WS2, and NiS intermediates were found to be generated during the gas sensing process.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）