NANOTECHNOLOGY
·
2022
·Vol. 33
·期 21
·215603
·
IF 3.953
Jiajun Xu,Dong Liu,Yubo Meng,Shiyu Tang,Fei Wang,Chao Bian,Xiaoyue Chen,Siren Xiao,Xiuxia Meng,Naitao Yang
Biomass-derived carbon materials have received a surge of scientific attention to develop lightweight and broadband microwave absorbers. Herein, rodlike porous carbon materials derived from cotton have been fabricated with uniformly dispersed CoFe2O4 nanoparticles via facile and scalable process. The combination of magnetic particles and carbonaceous material is advantageous to realize the magnetic-dielectric synergistic effect which could effectively promote the dissipation of incident waves, giving rise to an optimal reflection loss value of –48.2 dB over a qualified bandwidth (4.8 GHz) at 2.5 mm. The cotton-derived carbon rods with conductive network not only act as a supporter to carry the CoFe2O4 nanoparticles, but also provide massive heterointerfaces to facilitate the interfacial polarization. In consideration of the renewable and abundant resource of cotton, the as-prepared CoFe2O4/C composites would meet the increasing demand of lightweight and highly efficient microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Yongzhong Fu,Haitao Liu,Hongyu Liang,Lianshan Sun,Yongfeng Bu
Increasing the energy density ( E wt ) under large currents is always highly desired for supercapacitors using thick carbon electrodes. Herein, we report an ultra-thick carbon electrode composed of mesoporous carbon rods (MCR) with ultrahigh specific surface area. At 250 μm, it exhibits the highest capacitance ( C wt , 239 F g − 1 at 1 A g − 1 ) and C wt retention (53% at 100 A g − 1 ) in EMIMBF 4 as far as we know, and ultrahigh E wt (132 Wh kg −1 ) and achievable power density ( P wt , 74 kW kg −1 ). Even at ultra-thick 600 μm, its E wt and P wt are still up to 95 Wh kg −1 and 70 kW kg −1 , respectively, with the decay of C wt at 50 A g − 1 < 3% (much smaller than commercial carbon YP-50F). Such excellent performance is attributed to the unique MCR structure, i.e., the micron-sized rod-like frame structure consisted of interconnected carbon nanocages acting as axial electron channel, as well as the stacking pores formed by MCR serving as radial channels for ions, finally enabling electrons and ions to be rapidly transferred in the axial and radial directions, respectively. It fully demonstrates its potential application prospects in scenarios requiring high energy and high power at the same time.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Zhengrong Xu,Yu Li,Quanxin Guo,Shuai Shao,Zhongxun Wei,Rui Liu
Electrochemical CO 2 reduction reaction (CO 2 RR) offers a promising route for converting greenhouse gases into valuable chemicals. Herein, we report the synthesis of Bi-doped indium (In Bi) nanoparticles supported on a carbon rod (In-Bi x @C). Bi incorporation tuned the electronic structure of In and enhanced the CO 2 RR activity. The optimized In-Bi 100 @C catalyst achieved a 92.7 % formate Faradaic efficiency at −1.2 V vs. RHE with a good stability This study provides insights into metal doping strategies for advancing CO 2 RR performance.
研究领域:
电化学
·
纳米材料
·
环境化学
·
能量转换
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yuanyuan Dong,Jinming Li,Lei Zhang
Epinephrine (EP) is a catecholamine neurotransmitter produced from l -tyrosine (L-TY), which usually coexists with each other in biological fluids. Moreover, their abnormal concentrations are related to multiple diseases, so sensitive simultaneous determination of EP and l -TY is important. Herein, we delicately designed 3D SnS@Co ,N- C hierarchical hollow microrod assembled from 2D SnS nanoplates vertically anchored on the MOF derived cobalt, nitrogen co-doped carbon rod (Co ,N- C) as electrode materials using one-step hydrothermal method, followed by thermal annealing in N 2 , and accompanying sequential phase transformation (2D SnS 2 nanoplates in-situ reduced to SnS phase). Obtained hierarchical hollow carbon microrod with beneficial heteroatom doped not only provided sufficient electroactive sites, but also increased the conductivity of the materials. As-fabricated strongly coupled 3D SnS@Co ,N- C microrod displayed enhanced electrochemical performance, offering highly sensitive sensing responses toward biomolecules EP and L-TY. Differential pulse voltammetry (DPV) study indicated that the sensor offered wide linear ranges of 0.01–300.0 and 0.01–250.0 μmol/L, and low detection limits of 3.3 and 3.1 nmol/L for EP and L-TY respectively. The constructed sensor was successfully applied to monitor simultaneously EP and L-TY in milk, human urine and serum samples with high accuracy and reliability.
研究领域:
材料科学
·
生物医学工程
·
分析化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）