Multilayered MoS2 coated TiO2 hollow spheres for efficient photodegradation of phenol under visible light irradiation

Abstract

a b s t r a c tMultilayered MoS 2 coated hollow TiO 2 heterostructures were fabricated by a two-step hydrothermal process using TiO 2 hollow spheres as precursors. Compared with pure TiO 2 , the heterostructures exhibited greatly enhanced visible-light-responsive activity on photodecomposition of colorless phenol, due to the enlargement of visible light absorption and improvement separation efficiency of photogenerated electron-hole pairs. Photocatalytic activity was influenced by the MoS 2 /TiO 2 ratio and the optimized composition was obtained with high stability during recycling.

A comparative study on the photocatalytic degradation of organic dyes using hybridized 1T/2H, 1T/3R and 2H MoS2 nano-sheets

“…41 These reports highlight a crucial need for a careful structure (phase)property correlation for the material that takes into account all the different affecting factors. Signicant improvements in the photocatalytic degradation efficiency has been achieved in MoS 2 nanocomposites with graphene, 38 TiO 2 , [42][43][44][45] TiO 2 @zeolite, 46 Bi 2 WO 6 , 47 carbon nanobers, 48 PbS, 26 Fe 3 O 4 , 49 polyaniline, 36 and RGO/Fe 2 O 3 . 50 Bai et al employed a room temperature assembly mechanism to obtain TiO 2 /MoS 2 (1T) composites which exhibited enhanced efficiency compared to the 2H containing phase.…”

Activated Hydrotalcites Obtained by Coprecipitation as Photocatalysts for the Degradation of 2,4,6‐Trichlorophenol

“…However, TiO 2 has some disadvantages, such as the relatively high value of banded band energy (approximately 3.2 eV for anatase and 3.0 eV for rutile), which limits its absorption in the spectrum of the UV-Vis region, besides presenting a high rate of recombination of electrons and photoinduced holes that decreases their photocatalytic activity. erefore, to reduce band gap energy, several studies have focused on the doping of TiO 2 with metal ions such as nickel, manganese, cobalt, titanium, chromium, iron, vanadium, zinc, and copper, among others, as well as with nonmetallic elements such as nitrogen, carbon, and fluorine, or even through the formation of composites with MnO 2 , In 2 O 3 , CeO 2 , and MoS 2 [32][33][34][35][36][37][38][39][40][41][42][43].…”

Ultrasmall TiOx Nanoparticles Rich in Oxygen Vacancies Synthesized through a Simple Strategy for Ultrahigh‐Rate Lithium‐Ion Batteries

“…The well-defined lattice fringes with a spacing of 0.356 nm are clearly observed, which can be assigned to the (101) planes of anatase TiO 2 , which has a spacing of 0.352 nm. [38,42] The crystal structure of the obtained grey TiO x powder was further determined by XRD. As shown in Figure 3a, all the diffraction peaks can be assigned to anatase TiO 2 (JCPDS card no.…”