Main research orientation. 1. Preparation of graphene and nanostructured metal oxides by electrochemical, sonoelectrochemical, and ultrasonic-assisted cathodic plasma electrolysis approach and its application for environmental treatment. 2. Preparation of low-cost adsorbents from bio-waste and industry solid waste for environmental treatment. 3. Preparation of metal oxide, graphene/metal oxide nanocomposite for energy storage and electrochemical sensing of As, glucose, uric, phenol and H2O2 in aqueous solution.