Henan University of Technology

About: Henan University of Technology is a education organization based out in Zhengzhou, China. It is known for research contribution in the topics: Catalysis & Chemistry. The organization has 7648 authors who have published 6503 publications receiving 73067 citations. The organization is also known as: Hénán Gōngyè Dàxué.

Supercapacitor Performances of the MoS2/CoS2 Nanotube Arrays in Situ Grown on Ti Plate

Abstract: We have designed and synthesized CoS2 and MoS2/CoS2 nanotube arrays by one-step hydrothermal method using Co(OH)2 nanorod arrays as the template. The products were characterized by X-ray diffraction pattern, X-ray photoelectron spectroscopy, field-emission scanning electron microscopy, and transmission electron microscopy. The MoS2/CoS2 electrode is demonstrated to have a relatively high area capacitance of 142.5 mF cm–2 at 1 mA cm–2, which is higher than that of CoS2 or MoS2 electrode. Besides, the electrode also shows excellent cycle stability of 1000 cycles with 92.7% retention, which is also superior to that of CoS2 and MoS2 electrodes. These results indicate that MoS2/CoS2 nanotube arrays have potential as electrode materials of supercapacitors because of the synergistic reaction of MoS2 (which supplies the specific surface area and effective electrolyte accessibility) and CoS2 (which serves as a conductive channel and reduces the phenomenon of aggregation). The design of MoS2/CoS2 architecture may o...

Effect of degradation methods on the structural properties of citrus pectin

Abstract: The molecular mass and its distribution of citrus pectin degraded by different methods were investigated. The primary structure and nanostructure of the degraded products were also identified. The results indicated that acid (80 °C, 12 h), ultrasound-assisted acid (25 °C, 2.5 h) and ultrasound (25 °C, 1.5 h) degraded pectins had equivalent molecular mass. The molecular mass distribution of ultrasound-assisted acid and ultrasound degraded pectins were less polydisperse than that of acid degraded pectin. According to HPLC, IR and NMR analysis, the main chain of ultrasound degraded pectin could be preserved. By contrast, acid degraded pectin was completely free of neutral sugar-side chains. Furthermore, the esterification level of ultrasound-assisted acid and ultrasound degraded pectins was considerably lower than that of original pectin, whereas that of the acid degraded pectin was nearly equal to zero. AFM analysis indicated that the morphology of original pectin was different from that of degraded pectins. The length of linear chains of degraded pectins was shorter and density of branches was lower, compared with that of original pectin. The results indicated that the ultrasound degradation method has the advantage of being timesaving, milder and environment-friendly.