Photocatalytic and Antibacterial Properties of a 3D Flower-Like TiO2 Nanostructure Photocatalyst

Abstract

Flower-like titanium dioxide (TiO2) nanostructures are successfully synthesized using a hybrid sol-gel and a simple hydrothermal method. The sample was characterized using various techniques to study their physicochemical properties and was tested as a photocatalyst for methyl orange degradation and as an antibacterial material. Raman spectrum and X-ray diffraction (XRD) pattern show that the phase structure of the synthesized TiO2 is anatase with 80-100 nm in diameter and 150–200 nm in length of flower-like nanostructures as proved by field emission scanning electron microscope (FESEM). The energy-dispersive X-ray spectroscopy (EDS) analysis of flower-like anatase TiO2 nanostructure found that only titanium and oxygen elements are present in the sample. The anatase phase was confirmed further by a high-resolution transmission electron microscope (HRTEM) and selected area electron diffraction (SAED) pattern analysis. The Brunauer-Emmett-Teller (BET) result shows that the sample had a large surface area (108.24 m2/g) and large band gap energy (3.26 eV) due to their nanosize. X-ray photoelectron spectroscopy (XPS) analysis revealed the formation of Ti4+ and Ti3+ species which could prevent the recombination of the photogenerated electron, thus increased the electron transportation and photocatalytic activity of flower-like anatase TiO2 nanostructure to degrade the methyl orange (83.03%) in a short time (60 minutes). These properties also support the good performance of flower-like titanium dioxide (TiO2) nanostructure as an antibacterial material which is comparable with penicillin which is 13.00 ± 0.02 mm inhibition zone against Staphylococcus aureus.

In-vitro and in-vivo wound healing studies of Ag@TiO2NRs/GG hydrogel film for skin tissue regeneration

“…The Ag@TiO 2 NRs was successfully synthesised in this study because all peaks belonging to the Ag FCC structure were observed at 38.02°, 44.40°, 64.70°, and 77.72°, as well as other peaks at 25.62°, 38.28°, 48.16°, 53.9°, 54.34°, 55.36°, 63.06°, and 69.26°that can be indexed to (101), (004), ( 200), ( 105), ( 211), (204), and (220) tetragonal crystal planes of anatase TiO 2 (figure 3) (b). As reported by other researchers, a prominent peak at ∼25°is exclusive to the anatase TiO 2 (101) crystallographic plane [37,38]. The presence of sharp peaks was attributed to the crystalline structure of the Ag@TiO 2 NRs sample.…”

3D Flower-like Composites in Energy Storage and Photocatalytic Applications: A Review

“…With the increasing industrialization and urbanization, the limitation of the fresh waterbodies and elevating water pollution can be the critical recognized issue. The 3D-flower like composites acts as a photocatalyst for photocatalytic degradation of the certain organic pollutant such as a pesticide, dyes, antibacterial material and drugs can be done using efficient visible light irradiation [41][42][43][44][45][46][47][48][49]. In photocatalytic applications of 3D flower-like composites, BiOCl-containing 3D composites were discovered to have enhanced visible light sensitivity because BiOCl had less activity in visible light.…”

Synthesis of cesium lead halide perovskite/zinc oxide (CsPbX3/ZnO, X= Br, I) as heterostructure photocatalyst with improved activity for heavy metal degradation

“…This class of materials possesses the general formula of ABX 3 where A is a cation (organic/inorganic), B is a divalent metal (Pb 2+ , Sn 2+ , Ge 2+ ), and X is an anion (Cl 1- , Br 1- , I 1- or mixture) ( Kulkarni et al, 2019 ; Yang et al, 2019 ). In recent years, semiconductor materials have been widely used as photocatalyst in the environmental and energy sectors due to their novel physiochemical features and cost-effectiveness ( Batool et al, 2020 ; Shen et al, 2021b ) Commonly used metal-based semiconducting photocatalysts include TiO 2 ( Fujishima et al, 2000 ) ( Zhang et al, 2021b ), Fe 2 O 3 ( Hitam and Jalil, 2020 ), CdS ( Cheng et al, 2018 ), MoS 2 ( Shen et al, 2020 ), ZnS ( Lee and Wu, 2017 ), and ZnO ( Johar et al, 2015 ).…”