Synthesis of TiO2 using different hydrolysis catalysts and doped with Zn for efficient degradation of aqueous phase pollutants under UV light

Abstract

In this work, various TiO 2 and TiO 2 doped with 0.1, 1.0, and 5.0 mol% of Zn were prepared by the sol-gel method varying different hydrolysis catalysts (HNO 3 , OHAc, H 3 PO 4 ) in order to be used as photocatalysts for environmental applications. The X-ray diffraction results showed that the different TiO 2 samples have presented the anatase as main phase, However, the acid nature has played an important role in the superficial and optical properties. The N-physisortion analysis has revealed that the specific surface area of calcined TiO 2 samples prepared using H 3 PO 4 , HOAc, and HNO 3 was 245, 100, and 90 m 2 g -1 , respectively, while the spectroscopic UV analysis, the band gap energy has shifted by 3.3-3.0 eV. In order to improve the optical properties of TiO 2 , the last preparation was doped with different zinc concentrations. The result showed that, as the Zn concentration increase by 0.1-5.0 mol%, the surface area increased from 90 to 120 m 2 g -1 . Nevertheless, the E g returned from 3.0 to 3.32. The SEM analyses have not revealed important morphological changes between no doped and doped materials. The catalytic activity of the composite was studied on the photocatalytic degradation of 2,4-Dichlorophenoxyacetic acid (2,4-D) and the activity results showed that small Zn concentrations decrease the t 1/2 in 28 min.

Synthesis of nickel doped anatase titanate as high performance anode materials for lithium ion batteries

“…This inhibition effect was already observed in our previous work [25]. And some other groups also reported a similar result using a traditional calcination doping process [22,26]. Besides the crystallinity inhibition effect, it is important to note that diffraction peak shift is identified in TiO 2 -400 and TiO 2 -Ni-400 patterns.…”

Synthesis, Characterization and Catalytic Activity of NiO-CoO-MgO Nano-Composite Catalyst

“…00-003-0998(D). We can conclude and confirm the formation of the desired mixed oxides in the prepared catalyst [13] as in Table 1.…”

Mn-Doped TiO2 Nanosheet-Based Spheres as Anode Materials for Lithium-Ion Batteries with High Performance at Elevated Temperatures

“…Similar inhibition effects on the TiO 2 phase transition have been reported by other groups doping with various ions and methods. 35,36 On the basis of the BET and XRD tests, we can conclude that Mn ions doping process improved the structure stability and inhibited the crystallization of the TiO 2 nanosheet-based structure.…”