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Catalytic activity evaluation of mesoporous a-GaOOH microspheres self-assembly
M. Muruganandham,Rominder Suri,Mika Sillanpaa,Bashir Ahmmad,Gang-Juan Lee,Jerry J. Wu 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The mesoporous a-GaOOH was synthesized using oxalic acid in a hydrothermal process at various hydrothermal temperatures and times. The nitrogen adsorption analysis indicated that a-GaOOH with surface areas ranging from 6 to 87 m2/g and pore sizes from 3.8 to 7.2 nm can be prepared by adjusting the experimental conditions. The photocatalytic hexavalent chromium reduction was studied under UV light irradiation and the results showed that a-GaOOH having higher surface area owned higher photocatalytic activity. The degradation of 2-ethoxy ethyl acetate in catalytic ozonation process showed that the degradation was enhanced over ozonation process in the presence of mesoporous a-GaOOH
Facile Synthesis of Self-Assembled Biporous NiO and its Electrochemical Properties
M. Muruganandham,Rominder P.S. Suri,Mika Sillanpää,Gang-Juan Lee,Jerry J. Wu 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.5
In this article, we report the synthesis of self-assembled bi-porous nickeloxide on a large scale without using any templates or matrix. Porous NiOmicrospheres composed of particles were obtained by thermaldecomposition of nickel oxalate, which was prepared using nickel salt andoxalic acid as precursors. The as-obtained nickel oxalate and nickel oxidewere characterized using X-ray powder diffraction (XRD), ScanningElectron Microscopy (SEM), Transmission Electron Microscopy(TEM), X-ray Photoelectron Spectroscopy (XPS), thermogravimetricanalysis (TGA), and nitrogen adsorption-desorption analysis. Theinfluence of various experimental conditions on the formation nickeloxalate and NiO were studied. The nitrogen adsorption-desorptionanalysis showed that the synthesized NiO possesses a biporous (bothmesoporous and macroporous) surface structur. The NiO microspheresshowed a discharge capacity of 2929 mAh g−1. A plausible mechanism forthe NiO self-assembly was proposed.