INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2019
·Vol. 44
·期 2
·977-987
·
IF 3.343
Chuan Ding,Weilong Xu,Min Wang,Xueqin Zeng,Wei Wang
Summary ZnCo 2 O 4 /C microhydrangeas with controllable microstructure are successfully synthesized through a simple citrate-guided solvothermal method and following thermal decomposition. The experimental results reveal that the citrate-directed self-regulation of Zn-Co-EG agglomerates play a critical role in the formation of the hydrangea-like precursors. When applied as anode material in lithium ion batteries (LIBs), ZnCo 2 O 4 /C microhydrangeas exhibited high available capacities of 964.6 mAh g −1 at 1 A g −1 after 200 cycles and 704.4 mAh g −1 at 4 A g −1 over 1000 cycles. The excellent reliability is attributed to the superior microstructure that provides many benefits including enhanced electron or ion transport and improved structure stability, etc.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2018
·
IF 2.631
Jun Chen,Jing Zhan,Yumeng Zhang,Yiwei Tang
A novel ZnCo 2 O 4 /Bi 2 O 3 heterojunction photocatalyst was prepared, and the formation of the heterojunction was confirmed via HRTEM . Photocatalytic activity of as-prepared samples was evaluated through photodegradation of malachite green (MG). The degradation results show that the as-prepared 13% ZnCo 2 O 4 /Bi 2 O 3 heterojunction photocatalyst exhibits higher activity than pure Bi 2 O 3 . The MG degradation rate for the as-prepared catalyst is as high as 94%. The enhanced photocatalytic activity is mainly attributed to the broad photoabsorption and low recombination rate of photogenerated electron-hole pairs, which is driven by the photogenerated potential difference formed at the ZnCo 2 O 4 /Bi 2 O 3 heterojunction interface.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2016
·Vol. 4
·期 16
·5958-5964
·
IF 8.262
Hua Chen,Guohua Jiang,Weijiang Yu,Depeng Liu,Yongkun Liu,Lei Li,Qin Huang,Zaizai Tong
Electrospun carbon nanofiber composites (ZnCo2O4/Ag–GO–CNFs) coated with 3D urchin-like ZnCo2O4 nanosheets to form a shish-kebab structure have been prepared using a combination of electrospinning, carbonization and hydrothermal treatments. The composition and microstructure of ZnCo2O4/Ag–GO–CNFs were investigated using field emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) analysis. Interestingly, ZnCo2O4/Ag–GO–CNFs provided a new style of electrode materials and exhibited an excellent specific capacity of 459.48 mA h g−1 at 20 mV s−1. Notably, the specific capacity of ZnCo2O4/Ag–GO–CNFs also exhibited a remarkable cycling stability (96.0% retention after 9000 cycles), which holds great promise for practical applications in energy storage devices as a carbon-based electrode material.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2013
·
IF 2.39
Xiong Song,Qiang Ru,Beibei Zhang,Shejun Hu,Bonan An
A novel flake-by-flake ZnCo 2 O 4 (ZCO) with porous nanostructure is prepared by a typical and facile co-precipitation method using oxalic acid as complex agent. XRD, SEM, and TEM analyses show the as-prepared ZCO nanoparticles have a high purity and a good crystallinity, and the ZCO nanoflakes with a thickness of 30–80 nm are composed of uniform ZCO nanocrystals with a diameter of 20–40 nm. The novel structure with enough free space is beneficial to improving the electrochemical performance. The as-prepared ZCO used as an anode material for lithium-ion batteries exhibits a high specific capacity of 1275 mA h/g at a current rate of 100 mA/g after 50 cycles, as well as a high power capability at elevated current rates, i.e., 1130 and 730 mA h/g at current rates of 500 and 3000 mA/g, respectively. It has a great prospect for the application of anode materials for lithium-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
Canadian Journal of Chemistry
·
2020
·Vol. 98
·期 12
·
IF 1.171
Xin Chang,Xiangyang Xu,Zhifeng Gao,Yingrui Tao,Yixuan Yin,Guangyu He,Haiqun Chen
A nanocomposite, reduced graphene oxide (RGO) modified ZnCo2O4 (ZnCo2O4–RGO) was synthesized via one-step solvothermal method for activating persulfate (PS) to degrade bisphenol A (BPA). The morphology and structure of the nanocomposite were identified by X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. RGO provides nucleation sites for ZnCo2O4 to grow and inhibits the agglomeration of the nanoparticles. The influence of different reaction conditions on the oxidation of BPA catalyzed by ZnCo2O4–RGO was investigated, including the content of RGO, the dosage of catalyst, the concentration of humic acid (HA), anions in the environment, the reaction temperature, and pH. BPA can be totally degraded within 20 min under optimized reaction conditions. The presence of HA, Cl−, and NO3− only has a slight effect on the oxidation of BPA, whereas the presence of either H2PO4− or HCO3− can greatly inhibit the reaction. ZnCo2O4–RGO shows good cycling stability and practical application potential. A reaction mechanism of the degradation of BPA was also explored.
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yang Li,Yanxin Chu,Yuanfang Li,Cheng Ma,Lingling Li
The detection of specific DNA sequences provides a powerful tool for early diagnosis and prevention of disease. Herein, an enzyme-free electrochemiluminescence (ECL) DNA biosensor was developed by coupling inorganic-organic nanocomposite as the luminophore and ZnCo 2 O 4 as the efficient accelerator. ZnCo 2 O 4 nanoparticles (ZCO NPs), derived from Co and Zn based bimetallic zeolite imidazole framework, was used as the ECL substrate due to their large surface area and excellent catalytic effect. AgInS 2 -ZnS quantum dots (ZAIS) were covalently linked with meso -tetra(4-carboxyphenyl)-porphine (TCPP) to form ZAIS/TCPP inorganic-organic nanocomposites, which were used for the first time as the cathodic ECL luminophore with the coreactant of K 2 S 2 O 8 . Detection of target DNA (tDNA) about chronic myeloid leukemia (CML) was achieved based on dual-signal amplification via cascade toehold-mediated strand displacement reaction (TMSDR). On the basis of experimental results, a limit of detection (LOD) of 200 aM was achieved in the range of 0.5 fM to 1 nM, which showed the excellent performance of this biosensor. This work not only indicates that inorganic-organic nanocomposites as the ECL luminophore is a feasible strategy for efficient emission, but also expands the application of nanomaterials derived from metal organic frameworks.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 16
·8683-8692
·
IF 7.443
Lingyun Guo,Qiang Ru,Xiong Song,Shejun Hu,Yudi Mo
Pineapple-shaped ZnCo2O4 (ZCO) microspheres with a porous nanostructure are synthesized by a typical hydrothermal method and used as high performance anodes in Li-ion batteries. The microspheres show excellent cycling and rate performance. The initial discharge capacity of 1596.2 mA h g−1 and the reversible discharge capacity of 1132 mA h g−1 can be maintained after 120 cycles at a current density of 100 mA g−1. More interestingly, the reversible capacity as high as 800 mA h g−1 can be retained at a high current density of 1000 mA g−1 after 200 cycles. Surprisingly, the pineapple-shaped ZCO electrode exhibits a prominent rate performance, a reversible specific capacity of 1237 mA h g−1 and 505 mA h g−1 at current densities of 500 mA g−1 and 6000 mA g−1 respectively. In addition, the influence of distilled water and urea on the phase and morphology of the material is investigated by SEM and EDS. The results indicate that adding distilled water into the solvent could ensure the high purity of products with no loss of the Zn element. At the same time, the cycle performance can be effectively improved because of the more regular surface and the more stable structure of the microspheres with urea-assistance.
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Wangchang Geng,Pengfei Song,Libing Duan,Tingyue Luan
Metal-organic frameworks (MOFs)-derived metal oxides have a high specific surface area and porous structure, making them promising for gas sensing applications. In this paper, MOFs-derived In 2 O 3 /ZnCo 2 O 4 composites were synthesized using a two-step solvothermal method. Through a series of characterization strategies, it is revealed that the morphology of the In 2 O 3 /ZnCo 2 O 4 composites consists of hollow microtubes and microflowers. The gas sensing performance of In 2 O 3 /ZnCo 2 O 4 composites was significantly enhanced compared to pure In 2 O 3 . Among them, the In 2 O 3 /ZnCo 2 O 4 -2 sensor exhibited superior performance towards 100 ppm n -butanol gas, with a lower operating temperature of 200℃, a higher response value of 208.7, a lower detection limit of 4.2 ppb, shorter response/recovery times of 152 s/223 s, higher selectivity, and better repeatability. Furthermore, the improved gas response can be attributed to the utilization of MOFs as self-sacrificial templates, the high specific surface area of the sensing materials, and the formation of p-n heterojunctions. This study provides a valuable reference for synthesizing n -butanol sensing materials with a high specific surface area, strong response, and excellent selectivity.
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 1
·187
·
IF 4.6
Shuqi Liao,Weisen Deng,Feng Yang,Jutao Zhou,Ling Wu,Donghong Yu,Zhong Cao
Compared to natural enzymes, the development of efficient artificial simulated enzymes, such as those based on bimetallic materials with high catalytic activity and good stability, is an important way until now. Herein, we employed ZnCo2O4microspheres as carriers to synthesize Pt-doped composites with different amounts using a one-pot method. The morphology and structure of the synthesized materials were characterized using XRD, SEM, BET, FT-IR, XPS, and Zeta potential techniques. It was found that Pt0adhered well to the surface of ZnCo2O4microspheres, with a 12.5% Pt doped ratio exhibiting abundant oxygen vacancies, excellent substrate affinity, and high peroxidase-like activity. Using fluorescent probes and electrochemical methods, the peroxidase-like catalytic mechanism has been explored that Pt@ZnCo2O4microspheres can accelerate the electron transfer between H2O2and 3,3′,5,5′-tetramethylbenzidine (TMB). Based on the optimal loading ratio of 12.5% of Pt@ZnCo2O4, a colorimetric sensor for visual detection of L-cysteine (L-Cys) was constructed, exhibiting a wide linear range of 0.1~50 µM and a low detection limit of 0.0163 µM. The sensor possesses good selectivity, reusability, and usage stability, which can be well applied to the determination of L-Cys in health product capsules with recovery rates of 96.9%~103.7% and RSD of 1.07%~6.50%. This work broadens the application prospects of spinel materials such as ZnCo2O4in the field of biological analysis and also provides inspiration for the development of new artificial simulated enzymes.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2017
·
IF 6.337
Jingxin Zhao,Chaowei Li,Qichong Zhang,Jun Zhang,Xiaona Wang,Juan Sun,Juanjuan Wang,Jixun Xie,Conghua Lu,Weibang Lu,Yagang Yao
A high-performance, all-solid-state hybrid supercapacitor (HSC) device was assembled successfully. The ZnCo 2 O 4 nanowire array (NA)/carbon nanotube film (CNTF) positive electrode materials and the assembled device possess areal specific capacitances of 1.019 F cm −2 and 158.08 mF cm −2 , respectively. A supernal volume energy density of 49.5 mWh cm −3 was obtained when the voltage window increased to 1.5 V. Moreover, the assembled HSC device exhibited good cycling stability with 90.7% initial capacitance retention after 6000 cycles, and the coulombic efficiency remained near 100%.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2014
·
IF 2.726
Xiong Song,Qiang Ru,Yudi Mo,Shejun Hu,Bonan An
A novel fiber bundle nanostructured ZnCo 2 O 4 (ZCO) is prepared by a typical and facile co-precipitation method using oxalic acid as complex agent. XRD, SEM, and TEM analyses show the as-prepared ZCO crystals have a high purity and a good crystallinity, and the ZCO nanowires with a diameter of 10–30 nm are composed of uniform ZCO nanocrystals with a size of 30–60 nm. The novel structure with enough free space is beneficial to improving the electrochemical performance. The as-prepared ZCO fiber bundle used as an anode material for lithium-ion batteries exhibits a high specific capacity of 1026.3 mA h g −1 at a current rate of 100 mA g −1 after 100 cycles, as well as a high power capability at elevated current rates, i.e., 1015.1 and 606.2 mA h g −1 at current rates of 500 and 2000 mA g −1 , respectively. It has a great prospect for the application of anode materials for lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机功能材料
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 26
·10061-10068
·
IF 4.569
Congli Wang,Hongfang Jiu,Lixin Zhang,Wei Song,Yufang Zhang,Hao Wei,Qianwen Xu,Yaqi Qin,Sicong Che,Zhixin Guo
It is of utmost importance to explore bifunctional electrocatalysts for water splitting. Herein, unique ZnCo2O4–CoOOH heterostructured ultrathin nanosheets on Ni foam are reported that combines a two-step hydrothermal method. This catalyst exhibits excellent catalytic performances to achieve a current density of 10 mA cm−2 with an ultralow overpotential of 115 mV for HER, attaining an overpotential of 238 mV at 20 mA cm−2 for OER. Remarkably, ZnCo2O4–CoOOH/Ni shows a voltage of 1.494 V to drive a current density of 10 mA cm−2. Such performances are due to the inter-penetrative pores present in the ultrathin nanosheets that provide large surface areas and expose massive active sites to enhance activities. In addition, the unique nanosheet structure and the 3D Ni foam substrate possess large specific surface areas, which can facilitate mass diffusion. This excellent performance is ascribed to the ZnCo2O4–CoOOH heterostructure that manipulates strong synergy to improve the electrochemical activity. This study offers new insight on an innovative approach for the exploitation of effective bifunctional electrocatalysts with a heterostructure.
✓ 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）