MUMBAI, India, Sept. 22 -- Intellectual Property India has published a patent application (202641108541 A) filed by Vellore Institute Of Technology on September 10, 2026, for Ultrasonic-Assisted Method For Preparing A Bismuth-Based Buoyant Foam Photocatalyst For Degradation Of Pharmaceutical Contaminant.
Inventors include Sathishkumar Panneerselvam; and Ashina Chandran.
The application for the patent was published on September 18, 2026, under issue no. 38/2026.
Abstract: An ultrasonic-assisted method for preparing a bismuth-based buoyant foam photocatalyst for degradation of pharmaceutical contaminant is provided. The method includes (i) cleaning and pre-treating a foam substrate (polyurethane) using an alkaline solution and an acetone-water mixture; (ii) preparing a suspension of a bismuth- based photocatalytic material in an alcoholic solvent; (iii) subjecting the suspension to ultrasonic irradiation at about 42 kHz for about 30 minutes for dispersion; (iv) adding an acidifying agent and the pre-treated foam substrate to the suspension; (v) further subjecting the resulting mixture to ultrasonic irradiation at about 42 kHz for about 30 minutes to facilitate incorporation of the photocatalytic material into the foam substrate; (vi) drying the impregnated foam; and (vii) removing unbound photocatalytic material to obtain the bismuth-based buoyant foam photocatalyst. The photocatalyst provides buoyancy and photocatalytic activity for degradation of pharmaceutical contaminants in aqueous media. FIG. 1
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