Journal of Energy Storage
·
2024
·
IF 8.9
Yize Li,Weiqiang Zhou,Xuemin Duan,Danqin Li,Jingkun Xu,Zian Huang,Xiaojing Hao
Exploring high-performance metal oxide electrode materials is an essential way to boost the supercapacitor performance, and metal atom doping can significantly increase oxygen vacancies to improve the conductivity of electrode materials. A hydrothermal method is proposed for the preparation of sea urchin-like Pr-doped W 18 O 49 . A series of characterizations detected that Pr-doped W 18 O 49 produced significant lattice distortion and more amorphous regions, and the better electrochemical performance came from the increased concentration of oxygen vacancies, enlarged lattice spacing, higher specific surface area, and faster ion transport after Pr doping. Electrochemical measurements indicate that the specific capacitance of Pr-doped W 18 O 49 is improved from 381 F g −1 to 453 F g −1 at 3 A g −1 and exhibits a remarkable capacity retention of 95.6 % over 4000 cycles. An asymmetric supercapacitor assembled with this electrode and PPy achieved a high energy density of 21.9 Wh kg −1 at a power density of 701.5 W kg −1 , indicating the significance of Pr-doped W 18 O 49 for energy conversion and storage applications.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jiaxi Sui,Dongdong Liu,Chunyu Wang,Lijuan Wang,Bo Zhong,Yuanyuan Ma
Non-metallic Surface-Enhanced Raman Scattering (SERS) substrate materials with unique structures are considered as promising candidates for detection of dyes in the environment. In this work, a sea urchin-like K 2 Ti 8 O 17 (KTO) nanomaterial was prepared by a facile and efficient hydrothermal method . The enhancement factors of the sea urchin-like KTO for crystal violet and methylene blue are 3.8 × 10 5 and 2.45 × 10 5 respectively, and the minimum detection limits of both can reach 10 −8 M, which means the sea urchin-like KTO a promising non-metallic SERS substrate for detecting dyes in the environment. The excellent SERS performance of the sea urchin KTO was attributed to the excellent charge transfer and probe adsorption capability of KTO by energy band and zeta potential analysis. Finally, the excellent application potential of the sea urchin KTO was verified by simulating a practical use scenario.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2024
·
IF 2.4
Wu Fang,Ge Jin-Long,Zhu Yujun,Jiao Yuhong,Wu Zhong,Feng Chao,Zhao Yupei,Li Qiu
The development of high-performance and cost-effective electrocatalysts toward the oxygen evolution reaction (OER) is remarkably desirable but challenging. Herein, we design and fabricate a sea urchin-like S-doped Ni(OH) 2 electrocatalyst on nickel foam using a simple hydrothermal method, followed by treatment with Na 2 S solution. The introduction of S not only modulates the electronic structure of Ni(OH) 2 , but also improves the electronic conductivity, thus enhancing the OER performance of Ni(OH) 2 . Owing to the free-standing feature, modified electronic structure, and sea urchin-like structure, the optimized S-Ni(OH) 2 –30 min delivers excellent OER performance with overpotentials of 306 and 392 mV at 10 and 100 mA cm −2 , respectively, Tafel slope of 89.2 mV dec −1 , and stability for 30 h at 50 mA cm −2 . This work demonstrates the importance of incorporating S in Ni(OH) 2 to optimize the electronic structure for improving OER activity and provides a promising pathway to synthesize Ni(OH) 2 -based electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2021
·Vol. 11
·期 7
·769
·
IF 2.589
Yazhou Qin,Binjie Wang,Yuanzhao Wu,Jiye Wang,Xingsen Zong,Weixuan Yao
Bimetallic nanoparticles have received extensive attention due to their unique physical and chemical properties, including enhanced optical properties, chemical stability, and better catalytic activity. In this article, we have successfully achieved the controllable preparation of Ag@Au nanoparticles via a seed-mediated growth method. By regulating the amount of seeds—silver nanospheres—we realized that Ag@Au nanoparticles gradually changed from spherical to a sea-urchin-like structure. The structure and composition of the prepared nanoparticles were characterized via scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and high-angle circular dark field scanning transmission electron microscopy (HAADF-STEM). In addition, we use the prepared Ag@Au nanoparticles as a substrate material for highly sensitive surface-enhanced Raman spectroscopy (SERS). Using 4-aminothiophenol (4-ATP) as the test molecule, we explored the SERS enhancement effects of Ag@Au nanoparticles with different structures. Furthermore, we used Ag@Au nanoparticles for SERS to detect the drug fentanyl, and realized the label-free detection of fentanyl, with the lowest detection concentration reaching 10−7M. This research not only provides a method for preparing bimetallic Ag@Au nanoparticles with different structures, but also provides a reference for the application of Ag@Au nanoparticles in the field of detection technology.Keywords:Ag@Au nanoparticle;core–shell structure;sea-urchin-like structure;SERS;fentanyl
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2025
·
IF 6.7
Yuan Hu,Zhengnan Wei,Qiang Chen,Jing Xu,Lu Huang,Xi Lin
The advancement of green environmental protection and renewable new energy has become a pivotal aspect of sustainable development, particularly in light of the dual challenges posed by environmental pollution and energy scarcity. Bi₂S₃ is an environmentally friendly and cost-effective semiconductor material with high theoretical weight and volumetric capacity. Nevertheless, the electrochemical cycle of Bi 2 S 3 is characterised by a significant volume expansion, which can result in the formation of electrode powder and a deterioration in battery performance. In this work, a "sea urchin-like" Bi 2 S 3 electrode material is self-assembled from a nanorod designed and prepared as anode material for a sodium ion battery (SIB). The findings demonstrate that the 3D urchin-like configuration can enhance structural integrity, stabilize reaction intermediates, facilitate reversible transformation and mitigate the substantial volume fluctuations induced by sodium ions during the embedding and removal processes. This strategy facilitates the commercialisation of SIB and offers insights into the development of other energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
·
IF 4.4
Xin Lin,Li-Jun Li,He-Yuan-Xi Guo,Rui Li,Jun Feng
In this paper, 3D nano-silver trees/sea urchin-like gold Surface Enhanced Raman Spectroscopy (SERS) substrates were prepared by chemical reduction method, characterized by SEM, EDS, UV–Vis and XRD et.al, and the preparation process was optimized using Rhodamine B (RB) as the Raman signal molecule. The SERS characteristics of Uric Acid on this substrate were investigated and the results showed that the SERS substrate had a Raman enhancement factor of 1.9 × 10 7 for RB, and also had a significant Raman enhancement effect on Uric Acid. The SERS intensity ( I SERS ) at 1400 cm −1 showed a good linear relationship with the logarithm value of uric acid concentration (log C ) between the range of 5 × 10 −4 M to 1 × 10 −7 M. The linear fitting equation was I SERS = 890 (log C ) + 8066 (R 2 = 0.983), and the LOD = 2.8 × 10 − 8 M. The spiked test was performed in human serum with recoveries ranging from 82.86% to 125.13% and RSD (n = 3) < 3.5%.
研究领域:
分析化学
·
材料科学
·
医学诊断
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Tongbaihui Qi,Zhengjun Yao,Jintang Zhou,Haiyan Lin,Peijiang Liu,Yiming Lei,Yuxin Zuo
In this work, a polyaniline (PANI) fibers/Co 0.2 Ni 0.4 Zn 0.4 Fe 2 O 4 (CNZF) composite (mass ratio of PANI to CNZF is 1:1) with a novel urchin-like structure was successfully fabricated through interfacial polymerization. The CNZF was synthesized by the sol-gel method, and whereafter, the PANI fibers were grafted onto the CNZF surface through in-situ polymerization. Structural and morphological properties were systematically investigated by using field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectra (FTIR). In the frequency range of 2–18 GHz, the microwave absorption properties of samples were investigated by using vector network analyzer (VNA). The results demonstrated that the microwave absorbing capability of the PANI/CNZF composite was superior to the pure CNZF or PANI. For the PANI/CNZF composite, its optimal absorption peak reached −41.9 dB at 10.48 GHz with a 2.8 mm thickness and the effective absorption bandwidth (R L < −10 dB) was 3.76 GHz. Moreover, the maximum effective bandwidth of PANI/CNZF reached 5.24 GHz (12.66–17.90 GHz) with a thinner thickness of 1.9 mm. On account of advanced impedance matching and increased interfacial effects, the PANI/CNZF composite possessed excellent microwave absorption properties and can be used as absorbers with strong absorption, extended absorbing bandwidth, and thin thickness.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Chenzhi Zhang,Kailin Li,Tao Sun,Xiaoying Liu,Xingjian Dai,Quan Zhou,Dashuang Wang,Xinfang Zhang,Jiehang Ding,Xiaohan Huang,Jinsong Rao,Yi Hou,Ping-an Yang,Kechen Liu,Yuxin Zhang
Wideband absorption with low-frequency compatibility is always challenging for developing high-performance electromagnetic wave (EMW) absorbing materials. With magnetic loss and a sufficient polarization interface, ferrite materials are promising candidates for overcoming this challenge. To address impedance matching issues, a carrier material with a uniform pore distribution, namely, diatomite, is employed, resulting in a unique three-dimensional biomimetic structure. A biomimetic sea urchin-like nanomaterial composed of one-dimensional nanorod-shaped Fe3O4 (sea urchin-like nano-Fe3O4) is presented, demonstrating outstanding performance in EMW absorption. The optimized Fe3O4@FeP sample exhibits two absorption peaks spanning the C and Ku bands when the thickness is 5.35 mm. The experimental results show that the sea urchin-like nano-Fe3O4 achieves an astounding reflection loss of −60 dB at 6 GHz with a thickness of 3.9 mm and a maximum effective absorption bandwidth of 4 GHz at a thickness of 1.7 mm. This material design holds significant potential for low-frequency EMW absorption applications.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Dong Xu,Quankang Sheng,Ao Chen,Long Chen,Yu Zhang,Chao Zhu,Jian Chen,Shaoyun Chen,Chenglong Hu
Conductive polymers have great potential applications as electrode materials for supercapacitors in small energy storage devices. First, manganese sulfate (MnSO4) was oxidized to manganese dioxide (MnO2) microspheres with a diameter of 1.5–3.5 μm by catalysis of Ag+. Subsequently, polyaniline (PANI) grew in situ on the surface of MnO2 by the dilute solution method, using MnO2 as a self-degraded template in an acidic environment. The MnO2 was gradually reduced to Mn2+ because MnO2 acted as both an oxidant and a template for the polymerization of aniline, resulting in the formation of PANI microspheres with a hollow urchin-like structure. The as-prepared PANI, with its high specific surface area and porous properties, was considered a potential material for surface–interface chemical energy storage. Therefore, the specific capacitance of the hollow urchin-like PANI electrode could reach 531 ± 35 F/g at 5 mV/s, and the loss of specific capacitance was 41.0% when the current density increased from 1 to 10 A/g. Further analysis of the charge storage mechanism of the hollow urchin-like PANI electrode revealed that the electrode was controlled by slow kinetics, indicating that the electrode reaction was mainly controlled by the Faradaic intercalation process inside the active material. A symmetric supercapacitor device was also assembled using hollow urchin-like PANI microsphere electrodes, and the maximum energy density was about 17.92 Wh/kg at a power density of 500 W/kg.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Tian-Zhu Shi,Yu-Long Feng,Tao Peng,Bao-Guo Yuan
Fe 2 O 3 is one of promising negative materials for supercapacitors (SCs), because of its low cost and high theoretical value of specific capacitance. However, the inferior conductivity and insufficient ionic diffusion rate of Fe 2 O 3 will seriously hinder the electrochemical performance of Fe 2 O 3 , resulting in limiting its practical application in SCs. Herein, a sea urchin-like 3D Fe 2 O 3 was synthesized via hydrothermal methods. And then, the 2D Ti 2 C 3 T x MXene nanosheets with high conductivity closely self-assemble on the surface of Fe 2 O 3 to provide efficient pathways for the rapid electrons transport. In addition, the sea urchin-like structure of Fe 2 O 3 can facilitate the rapid diffusion of the electrolyte to accelerate faradaic reaction. The optimized Fe 2 O 3 /MXene composite as electrode material exhibits a high specific capacitance of 486.3 F g −1 at current density of 1 A g −1 , and excellent cycling stability with 95.7% capacity retention after 5000 charge/discharge cycles. Furthermore, an asymmetric supercapacitors (ASCs) device was assembled by using Fe 2 O 3 /MXene composite as anode and MnO 2 as cathode, showing a high energy density of 32.2 Wh kg −1 at the power density of 900.6 W kg −1 , and remarkable long-term durability (95.7 % capacitance retention after 5000 cycles). This work demonstrates an effective approach of integrating the sea urchin-like Fe 2 O 3 with 2D MXene nanosheets to fabricate Fe 2 O 3 /MXene composite for high-performance SCs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PAPERS
·
2019
·Vol. 73
·期 8
·1971-1978
·
IF 1.246
Liu Xiue,Sun Chen,Yue Yundi,Yan Tingjiang,He Yuanchun,Yu Yang,Li Wenjuan,Wang Wenliang,Zhu Kunlei,Jing Zhihong
Three-dimensional (3D) AgBr/TiO 2 microspheres with remarkable sea urchin-like architectures were prepared by a solvothermal-hydrothermal two-step process. The products have been characterized through XRD, SEM, HRTEM and Nitrogen adsorption–desorption analysis. The antibacterial activity of the 3D AgBr/TiO 2 microspheres against Escherichia coli ( E. coli ) was investigated quantitatively by microcalorimetric method for the first time. Meanwhile, the visible-light photocatalytic performance of the 3D AgBr/TiO 2 microspheres was also evaluated for the degradation of rhodamine B (RhB). As a contrast, the same tests were carried out for the conventional AgBr/P25 (TiO 2 ). The results show that the 3D AgBr/TiO 2 microspheres prevent better antibacterial and visible-light photoctalytic performance than the conventional AgBr/P25. It revealed that unique morphology effect, the extraordinary visible-light responses of AgBr and various oxidative radicals produced by visible light irradiated 3D AgBr/TiO 2 microspheres are responsible for improved antibacterial and photocatalytic performance.
研究领域:
材料科学
·
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
·
2021
·Vol. 54
·期 36
·365502
·
IF 3.207
Fan Zeng,Tao Huang,Bo Li,Yuan-Yuan Li,Hua-Wei Zhang,Yi-Meng Wang,Yi-Feng Chai,Wei-Qing Huang,Gui-Fang Huang
Electronic structure and morphology modulation are challenging for the construction of efficient electrocatalysts towards water splitting. Herein, a facile hydrothermal strategy and subsequent phosphorization process are utilized to synthesize urchin-like CoNiP integrated by nanowires. The synthesized urchin-like CoNiP can be applied as electrocatalysts for hydrogen evolution reaction (HER) in alkaline, neutral, and acidic media. In particular, the optimal urchin-like CoNiP exhibits superior HER activity in alkaline electrolytes, with small overpotentials (157, 317, and 437 mV) at the current density 10, 100, and 200 mA cm−2, respectively, and a small Tafel slope (49.6 mV dec−1) in 1 M KOH, which is comparable to that of Pt/C catalyst. Moreover, when urchin-like CoNiP is employed as both the cathode and anode in 1 M KOH, a low cell overpotential of 490 mV is required to reach the current density of 10 mA cm−2, suggesting the efficient electrocatalyst toward overall water splitting. The superior performance of urchin-like CoNiP can be associated with the sharp-tip enhancement effect since the hierarchical structure composed of nanowires with high curvature tips benefits the accumulation of electrons on the tip of the nanowires to serve as effectively active sites for reactions and the mass transfer, as well as the fast electron transfer due to the good electrical conductivity of the bimetallic phosphide. This work opens up a promising approach to rationally construct low-cost and efficient electrocatalysts for water splitting.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）