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Weifang, China

Jiang D.,Tianjin University of Technology | Zhang M.,Tianjin University of Technology | Jiang H.,Tianjin University of Technology | Jiang H.,Tianjin University | Jiang H.,Shandong Haihua Group Co.
Materials Letters | Year: 2011

Manganese and cerium composite oxide (MnOx-CeO2) hollow nanospheres were successfully prepared by precipitating manganese acetylacetonate and cerium acetylacetonate from their mixed methanol solution using supercritical carbon dioxide as an anti-solvent. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) were employed to characterize the precursor and as-prepared MnOx-CeO2. XRD analysis reveals the cubic fluorite structure of the MnOx-CeO 2. HRTEM results indicate that the MnOx-CeO2 hollow spheres have an average diameter of about 50 nm, and a wall thickness of 10-20 nm. A new formation mechanism of these nano-sized hollow spheres has also been proposed based on the experimental results. © 2011 Elsevier B.V. All rights reserved. Source

Jiang H.,Tianjin University of Technology | Jiang H.,Tianjin University | Jiang H.,Shandong Haihua Group Co. | Zhao J.,Tianjin University of Technology | And 2 more authors.
Catalysis Letters | Year: 2014

A series of manganese-cerium oxide (MnOx-CeO2) catalysts were successfully prepared by supercritical antisolvent process and used for low temperature selective catalytic reduction (SCR) of NOx with NH 3. The physicochemical properties of the catalysts were studied by using high-resolution transmission electron microscope, N2 adsorption, X-ray diffraction, X-ray photoelectron spectra, Raman spectra and temperature programmed reduction etc. Hollow spherical morphologies, nanocrystalline structures and solid solution structures were detected for these catalysts. The most active hollow nanospheres were obtained with a molar Mn/(Mn?Ce) ratio of 0.32 and a calcination temperature of 500 °C. Higher surface area, better oxygen mobility and richer surface active oxygen species are responsible for the good performance. The hollow MnOx- CeO2 nanospheres can be a new alternative for the lowtemperature SCR catalysts. © Springer Science+Business Media New York 2013. Source

Li L.,Shandong University of Technology | Zhang C.L.,University of Jinan | Wang M.,Shandong Haihua Group Co.
Applied Mechanics and Materials | Year: 2014

This paper presents stress analysis for globoidal indexing cam mechanism with steel ball, and stress model of each component is established. Globoidal indexing cam mechanism with steel ball is made up of globoidal cam, indexing plate and steel ball. The mechanism can realize approximate rolling transmission. Stress is analyzed for globoidal cam, indexing plate and steel ball at dell and indexing period respectively. According to rotary transform tensor theory stress in different coordinate system is obtained to build static equilibrium equations for steel ball conveniently. Axial force, radial force and peripheral force for globoidal cam and indexing plate are reached. © (2014) Trans Tech Publications, Switzerland. Source

Jiang H.,Tianjin University of Technology | Jiang H.,Tianjin University | Jiang H.,Shandong Haihua Group Co. | Huang P.,Tianjin University of Technology | And 2 more authors.
Materials Characterization | Year: 2012

Nanocrystalline Ce 1-xZr xO 2 hollow nanospheres were successfully synthesized via supercritical anti-solvent precipitation using supercritical CO 2 as the anti-solvent. It was found that the as-produced samples exhibited hollow spherical structures with uniform diameters ranging from 30 to 50 nm and the sphere walls were composed of various oriented nanocrystallites, with sizes of 3-7 nm. The results of high-resolution transmission electron microscopy showed that the formation of the hollow structures could be controlled by adjusting the solution concentration. The results of temperature-programmed reduction and oxygen storage capacity measurements showed that the hollow nanospheres had enhanced redox properties. A possible mechanism for the formation of Ce 1-xZr xO 2 hollow nanospheres has also been proposed and experimental investigated. © 2011 Elsevier Inc. Source

Shandong Haihua Group Co. | Date: 2009-03-03

Chemicals for industrial purposes; soda ash; lime chloride; sodium silicate; magnesium chloride; polyvinyl chloride; calcined soda; carbamide; industrial chemicals, namely, urea; melamine; potassium sulfate; anilin; ethyl acetate; dichloromethane; sodium; sodium bicarbonate; chemicals for use in industry and science; chemical preparations, namely, salts for industrial purposes.

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