Search

Your search keyword '"Li, Xiazhang"' showing total 414 results
Start Over Author "Li, Xiazhang"
414 results on '"Li, Xiazhang"'

28. Fabrication of porous LaFe1−xCoxO3–MWCNT composites and their applications in supercapacitors.

Author

Yang, Yu, Gong, Weifeng, Zhou, Yao, Tang, Tongtong, Liu, Wenjie, Yao, Chao, Zuo, ShiXiang, and Li, Xiazhang

Subjects
MULTIWALLED carbon nanotubes, COMPOSITE materials, ENERGY density, SUPERCAPACITOR electrodes, DOPING agents (Chemistry), ELECTRIC capacity
Abstract

This study synthesized LaFeO3 perovskite oxide with different cobalt doping ratios using the sol–gel method, followed by in situ hydrothermal treatment. The optimized LaFe0.8Co0.2O3 perovskite was then composited with linear multi-walled carbon nanotubes to investigate the structure, morphology, and electrochemical behavior of the composite material. In the composite material, linear MWCNTs were encapsulated into LaFe0.8Co0.2O3, and the content of MWCNTs had a significant impact on the performance of the composite material. When the ratio of LaFe0.8Co0.2O3 to MWCNTs reached 1 : 3, the electrochemical performance of the LaFe0.8Co0.2O3–MWCNT sample was optimal. Additionally, LaFe0.8Co0.2O3–MWCNTs-3 exhibited a high specific capacitance of 429.7 F g−1 at a current density of 1.0 A g−1, and the capacitance retention remained at 83.5% after 5000 cycles at a current density of 8.0 A g−1. In a symmetric electrode configuration, a specific capacitance of 151.6 F g−1 was achieved at the same current density, with a maximum energy density of 7.345 W h kg−1. [ABSTRACT FROM AUTHOR]

Published
2025
Full Text
View/download PDF

40. Preparation of SiO2/Attapulgite Composite Materials and Investigation of Its Adsorption Performance on Toluene in Humid Environment.

Author

Wenjie Liu, Ding, Xiang, Liu, Jingwei, Meng, Jie, Li, Xiazhang, Gao, Bingying, Zuo, ShiXiang, Yao, Chao, and Xue, Bing

Abstract

The composites (SiO2/HATP) were prepared by condensation reflux and high-temperature calcination using natural attapulgite and silica particles, and it was utilized for the adsorption of toluene. The physicochemical properties of the composite adsorbents were characterized using XRD, FT-IR, SEM, and BET techniques. The SiO2/HATP composite material was successfully prepared, with silica particles uniformly loaded onto the surface of ATP. The adsorption performance of the composite materials for toluene was investigated using different feed ratios. The results showed that the composite materials with the mass ratio SiO2/ATP equal to 4 exhibited the highest static adsorption capacity for toluene, reaching 236 mg/g. Additionally, dynamic adsorption performance of toluene was evaluated under conditions of 0 and 80% relative humidity, with corresponding breakthrough times of 90 and 36 min, respectively. The adsorption capacity of the composite materials for toluene was 6–8 times higher than that of pure attapulgite clay. Furthermore, the adsorption mechanisms of the composite materials were investigated through adsorption kinetics, adsorption isotherms, and adsorption thermodynamics. The results indicated that the adsorption of toluene by the composite materials followed a pseudo-first-order kinetic model and Langmuir adsorption isotherm, suggesting a spontaneous exothermic physical adsorption process at a monolayer level. Moreover, regeneration experiments were conducted, and after 5 cycles of adsorption-desorption tests, the composite materials maintained a penetration time of 85 and 30 min for toluene under conditions of 0 and 80% relative humidity, respectively, demonstrating good recyclability. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results