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Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate

Synthesis and Reaction Chemistry of Nanosize Monosodium Titanate

Published on: February 23, 2016

(Bi, C and N) codoped TiO2 nanoparticles.

Kangle Lv¹, Housong Zuo, Jie Sun

¹Key Laboratory of Catalysis and Materials Science of the State Ethic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China.

Journal of Hazardous Materials

|May 7, 2008

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This study developed novel Bi, C, and N codoped titanium dioxide (TiO2) photocatalysts. The codoped TiO2 exhibited enhanced photocatalytic activity under both UV and visible light, outperforming undoped and commercial TiO2.

Area of Science:

Materials Science
Nanotechnology
Photocatalysis

Background:

Titanium dioxide (TiO2) is a widely used photocatalyst, but its efficiency is limited by its wide bandgap and rapid recombination of photogenerated electron-hole pairs.
Doping TiO2 with various elements can modify its electronic structure, enhance visible light absorption, and improve photocatalytic performance.
Codoping with multiple elements offers a promising strategy to further optimize TiO2 properties.

Purpose of the Study:

To synthesize and characterize Bi, C, and N codoped TiO2 (Bi,SCN)-TiO2 photocatalysts using a sol-gel method.
To investigate the effects of codoping on the structural, optical, and photocatalytic properties of TiO2.
To evaluate the photocatalytic activity of the synthesized materials under UV and visible light irradiation.

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Reverse Microemulsion-mediated Synthesis of Monometallic and Bimetallic Early Transition Metal Carbide and Nitride Nanoparticles

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Main Methods:

Sol-gel synthesis of TiO2 doped with BiCl3 and KSCN.
Characterization using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), Diffuse Reflectance Spectra (DRS), X-ray Photoelectron Spectroscopy (XPS), Fourier-Transform Infrared Spectroscopy (FT-IR), and N2 sorption.
Photocatalytic activity testing under UV and visible light illumination.

Main Results:

Bi, C, and N elements were successfully incorporated into the TiO2 lattice, confirmed by XPS and elemental analysis.
The presence of Bi3+ caused a red shift in the optical absorption onset, while SCN- doping resulted in a long tail in the absorption spectrum.
The (Bi,SCN)-TiO2 exhibited superior photocatalytic activity compared to Bi-TiO2, undoped TiO2, and commercial P25 TiO2 under both UV and visible light irradiation.

Conclusions:

Codoping TiO2 with Bi, C, and N significantly enhances its photocatalytic activity.
The synergistic effect of codoping with both cation (Bi) and anion (SCN-, which decomposes to C and N) contributes to improved visible light absorption and charge separation.
The developed (Bi,SCN)-TiO2 photocatalyst shows great potential for environmental remediation applications.