A Process for Decomposition of Organic Synthetic Dyes Using Semiconductor-Oxides Nanotubes Via Dark Catalysis

In the present invention nanotubes-based dye-adsorbent powder is used for adsorption and decomposition of synthetic dye under dark-condition without the use of any external power-source such as the applied potential-difference, microwave, ultrasonicator, and others to save the energy consumption, which results in a complete dye-decomposition on the powder-surface. The surface-cleaned dye-adsorbent powder has very high specific surface-area and dye-adsorption capacity comparable with those of the original dye-adsorbent powder and can be recycled for the next cycles of dye-adsorption and dye-decomposition under the dark-condition. In the present method, the nanotubes-based dye-adsorbent powder is stirred under the dark-condition in an aqueous dye solution containing a strong oxidizer to get simultaneous dye-adsorption and dye-decomposition on the powder-surface, or getting dye adsorption in one solution and dye decomposition in a separate solution by said adsorbent powder under dark condition.

Patent Assignee:

Patent No: IN293723 [India]

Application No: 2555/DEL/2012

Inventor(s): Shukla Satyajit Vishnu; Warrier Krishna Gopakumar; Babu Babitha Kunnathuparambil

Issue Date: 03-09-2018

Filing Date: 17-08-2012

Implementing institute: National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala

Funding agency: Council of Scientific and Industrial Research (CSIR), Government of India

IPC Classification: C01B, C02F 1/28, C02F 1/72, C02F 1/38, C02F 01/30, B01J 20/06, B01J 20/34, B01J 21/06, B01J 35/02, B01J 38/00

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