Preparation of pod-shaped TiO ₂ and Ag@TiO ₂ nano burst tubes and their photocatalytic activity

Abstract

The pod-shaped TiO 2 nano burst tubes (TiO 2 NBTs) were prepared by the combination of electrospinning and impregnation calcination with oxalic acid (H 2 C 2 O 4 ), polystyrene (PS) and tetrabutyl titanate. The silver nanoparticles (AgNPs) were loaded onto the surface of TiO 2 NBTs by ultraviolet light reduction method to prepare pod-shaped Ag@TiO 2 NBTs. In this work, we analysed the effect of the amount of oxalic acid on the cracking degree of TiO 2 NBTs; the effect of the concentration of AgNO 3 solution on the particle size and loading of AgNPs on the surface of TiO 2 NBTs. Scanning electron microscopy and transmission electron microscopy investigated the surface morphology of samples. X-ray diffraction and X-ray photoelectron spectroscopy characterized the structure and composition of samples. Rhodamine B (RhB) solution was used to evaluate the photocatalytic activity of pod-shaped TiO 2 NBTs and Ag@TiO 2 NBTs. The results showed that TiO 2 NBTs degraded 91.0% of RhB under ultraviolet light, Ag@TiO 2 NBTs degraded 95.5% under visible light for 75 and 60 min, respectively. The degradation process of both samples was consistent with the Langmuir–Hinshelwood first-order kinetic equation. Therefore, the catalytic performance of the sample is: Ag@TiO 2 NBTs > TiO 2 NBTs > TiO 2 nanotubes.

An Experimental and Theoretical Study on the Effect of Silver Nanoparticles Concentration on the Structural, Morphological, Optical, and Electronic Properties of TiO2 Nanocrystals

“…With the increase of AgNPs in TiO2, the absorbance in the UV range was found to decrease, while the absorbance in the visible range was increased for AgNPs-loaded TiO2. This increase might be due to the fact that the ability of AgNPs-loaded TiO2 to absorb light in the visible region is stronger than that of pure TiO2 [55]. The absorption intensity of the pure and AgNPs-loaded TiO2 nanocrystals has been calculated using the relation: Whereas, the absorption coefficient (α) is calculated by the formula:…”

A Novel Approach to Enhance Mechanical and Thermal Properties of SLA 3D Printed Structure by Incorporation of Metal–Metal Oxide Nanoparticles

“…In this work, we emphasize the importance of pioneering coordination of nanotechnology and additive manufacturing technology, which were made a technological revolution in this era to lead immeasurable promises in science and technology. Silver decorated TiO 2 (Ag-TNP) is known to be an outstanding photoactive compound that is non-hazardous, cheap, and highly stable [52][53][54]. Here, we have reported the utilization of Ag decorated semiconducting TNP (Ag-TNP) as an effective initiator for the photopolymerization of acrylic-urethane resin under UV irradiation.…”

Ag-enriched TiO2 nanocoating apposite for self-sanitizing/ self-sterilizing/ self-disinfecting of glass surfaces

“…Since the ionic radii of Ag + (0.126 nm) is greater than that of Ti 4+ (0.068 nm) which permits only a little amount of Ag to dissolve into the periodic crystal lattice of TiO 2 by replacing the Ti 4+ ions [ 26 ]. This is due to reason that particles with smaller atomic radii than Ti atom act as interstitials to dissolve into Ti lattice as solid solution without substituting for Ti atoms [ 32 ]. These ionic radii mismatch also caused increase in d , ρ, and S as well as decrease in 2θ , β , W , a , c , and V with increase in enriching concentration.…”