The Photocatalytic Activity of Zns-TiO2 on a Carbon Fiber Prepared by Chemical Bath Deposition

Abstract

This research prepared a TiO2, ZnS, and ZnS-TiO2 film on a carbon fiber, to produce TiO2/C-fiber, ZnS-C-fiber, and ZnS-TiO2/C-fiber by Chemical Bath Deposition (CBD). Results show that TiO2/C-fiber consist of anatase at 2θ 25.3 o and 54.6 o, rutile at 2θ 43.5 o and a carbon characteristic peak at 2θ of 24.5 o. Meanwhile, the characteristic peaks of ZnS on ZnS-TiO2/C-fiber present at 2θ of 27.91 o and 54.58 o. TiO2/C-fiber has a band gap energy of 3.60 eV, the ZnS/C-fiber of 3.73 eV; when those two catalyst combine, the gap energy is 3.15 eV indicating the interface charge transfer between ZnS-TiO2. Photocatalytic treatment of an isopropanol solution with TiO2/C-fiber as a catalyst and under UV light radiation present results peaks at 222- 224 nm and 265 nm, indicating the electronic transition of acetone. Meanwhile, the isopropanol degradation with ZnS-TiO2/C-fiber produced a new peak at 234-237 nm. The Quantum Yield, QY, of ZnS-TiO2/C-fiber is 6.96 x 10-4, higher than TiO2/C-fiber, i.e., 0.42 x 10-4. It indicates that ZnS provides a significant role in the photocatalytic activity through a red shift of light response and decreasing electron-hole recombination.

Functionalization of Carbon Electrodes with Nanotitania by Atomic Layer Deposition

“…Broadbands centered around 23.92 °and 24.57 °Correspond to carbon phases (ICSD 28417 and ICSD 28419) [50,51]. A similar result has been found by Rahmawati et al with a similar carbon substrate and TiO 2 deposition [52].…”

Oxygen-Deficient WO3/TiO2/CC Nanorod Arrays for Visible-Light Photocatalytic Degradation of Methylene Blue

“…Considering the difficulty of separating and recovering the TiO 2 powder from the solution after the degradation reaction, TiO 2 can be coated on the substrate in order to improve the reusability and reduce the cost of the separation process [37]. Moreover, TiO 2 loaded on large-area-functionalized carbon fibers to form nanocomposites has many advantages.…”

Synthesis and Performance of TiO2/Fly Ash Cenospheres as a Catalytic Film in a Novel Type of Periodic Air-Sparged Photocatalytic Reactor

“…Titanium dioxide is one of the most commonly used compounds in photocatalytic reactions; this is primarily as a result of its relatively low cost and chemical stability [3]. Titanium dioxide can also be coupled with other compounds or ions in order to increase its photocatalytic activity [2,[4][5][6][7][8][9][10]. Nevertheless, the key factor in effective photocatalytic water purification, apart from the type of catalyst (decisive for the kinetics and the light wavelength allowing excitation), is photoreactor construction and the way in which the photocatalyst is distributed in the reaction zone.…”