Titanium dioxide had been noticed thoroughly for their superiorities over conventional p-n junction devices, such as low cost and slighter toxic in construction. In this research, we present and study the preparation of Carbon Nanotube/TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> acid treatment nanocomposite by the alteration of acid-catalyzed sol-gel method. The CNT/TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanocomposite powder was acid treatment in NaOH solution and directed on FTO glass substrates. The CNT/TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> paste was doctor blade onto the substrate plate to form a 1.0 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> active region and later on annealed at 550°C, 650°C and 750°C for 30 min. The characterization of the TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> adhesive was carried out by X-ray diffraction (XRD) and the results indicate that the particles of CNT/TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> are in rutile form not in anatase structure. The micrographs of scanning electron microscopy (SEM) images prove that the thin film pastes have high porosity and the Brunauer Emmett Teller (BET) result show the surface area, pore volume and pore size for the CNT/TiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> thin film.
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