The characterizations and electrochemical properties of lignosulfonate templates based mesoporous NiO

Abstract

Abstract. Environmentally recycled liginsulfonate were successfully employed for the facile synthesis of mesoporous NiO materials. The XRD, SEM, TEM and N 2 adsorption-desorption analysis were performed for characterizing the structure and surface properties of resultant NiO. The proximate globular structure of lignin macromolecules played an templating role in the formation of mesoporous framework of NiO. The fabricated NiO nanostructures had high specific surface area (193.8 m 2 /g), large pore volume (0.42 cm 3 /g), and narrow pore size distribution making them ideal candidates for supercapacitor applications. CV, ESI and galvanostatic constant-current charge/discharge tests showed that the fabricated mesoporous NiO had high specific capacitance (342 F·g −1 ) and good circulatory stability. Furthermore, the mesoporous NiO showed a good rate capability, which is due to that the ordered mesopores did not limit the ion motion within the pores. The results suggest that resultant NiO mesostructures are a promising supercapacitor electrode material.

Upgraded Valorization of Biowaste: Laser-Assisted Synthesis of Pd/Calcium Lignosulfonate Nanocomposite for Hydrogen Storage and Environmental Remediation

“…To scrutinize the present Pd NPs on the CLS surface, TEM analysis was performed for Pd100/CLS (Figure ). Light gray thin films are CLS nanosheets interconnected in a disorderly arrangement, as corroborated by another report . Spherical-type structures were formed in some regions, indicating that Pd NPs aggregated with each other, the space between Pd NPs and CLS surface being the generated porosity.…”

“…Light gray thin films are CLS nanosheets interconnected in a disorderly arrangement, as corroborated by another report. 53 Sphericaltype structures were formed in some regions, indicating that Pd NPs aggregated with each other, the space between Pd NPs and CLS surface being the generated porosity. The average diameter of Pd NPs is estimated, with Image J software, to be about 8 nm.…”