Patents by Inventor Raja Ambal SIVARAMAN

Raja Ambal SIVARAMAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photostable composite for solar water splitting and process for the preparation thereof
    Patent number: 11325113
    Abstract: The present invention discloses photostable composite of indium gallium nitride and zinc oxide for solar water splitting, comprising Indium content in the range of 1-40 wt %, Ga content in the range of 1 to 15 wt %, nitrogen content in the range of 0.1 to 5 wt %, and the remaining is ZnO. The combustion synthesis comprises the steps of: (a) dissolving 45 to 55 wt % urea, 75 to 80 wt % Zinc nitrate, 3 to 5 wt % Gallium nitrate, and 15 to 20 wt % Indium nitrate in water with stirring until a homogenous solution is formed; and (b) heating the homogenous solution of step (a) at a temperature in the range of 450-550 [deg.]C. for period in the range of 2 to 20 min to obtain the photostable composite.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: May 10, 2022
    Assignee: Council of Scientific & Industrial Research
    Inventors: Chinnakonda Subramanian Gopinath, Raja Ambal Sivaraman
  • PHOTOSTABLE COMPOSITE FOR SOLAR WATER SPLITTING AND PROCESS FOR THE PREPARATION THEREOF
    Publication number: 20160136631
    Abstract: The present invention discloses photostable composite of indium gallium nitride and zinc oxide for solar water splitting, comprising Indium content in the range of 1-40 wt %, Ga content in the range of 1 to 15 wt %, nitrogen content in the range of 0.1 to 5 wt %, and the remaining is ZnO. The combustion synthesis comprises the steps of: (a) dissolving 45 to 55 wt % urea, 75 to 80 wt % Zinc nitrate, 3 to 5 wt % Gallium nitrate, and 15 to 20 wt % Indium nitrate in water with stirring until a homogenous solution is formed; and (b) heating the homogenous solution of step (a) at a temperature in the range of 450-550 [deg.]C for period in the range of 2 to 20 min to obtain the photostable composite.
    Type: Application
    Filed: June 3, 2014
    Publication date: May 19, 2016
    Inventors: Chinnakonda Subramanian GOPINATH, Raja Ambal SIVARAMAN