Visible-light absorption and photocatalytic activity in molybdenum- and nitrogen-codoped TiO2

Tan, Keqi; Zhang, Huarong; Xie, Chaofei; Zheng, He‐Gen; Gu, Yongwei; Zhang, W.F.

doi:10.1016/j.catcom.2009.10.025

Cited by 69 publications

(34 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among photocatalysts, TiO 2 has received the most attention as a photocatalytic material because of its superior photocatalytic activity, chemical stability, low cost, and nontoxicity [8,9]. A major drawback of TiO 2 is the large band gap of 3.2 eV.…”

Section: Introductionmentioning

confidence: 99%

A novel Ag/BiOBr nanoplate catalyst with high photocatalytic activity in the decomposition of dyes

Fan

Meng

et al. 2011

Reac Kinet Mech Cat

View full text Add to dashboard Cite

A novel Ag/BiOBr composite catalyst has been synthesized by a solution combination with photodeposited method. The as-synthesized catalysts were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-Vis diffuse reflectance spectra. The photocatalytic reaction tests in the degradation of the dyes of acid orange II, rhodamine B and methyl orange showed that the deposition of optimal amount of 1-2 wt% Ag could bring about a big increase in the activity under visible light irradiation. The high photocatalytic performance could be attributed to the strong visible light absorption and low recombination rate of the e -/h ? pairs resulted in by the presence of metal silver nanoparticles.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel Ag/BiOBr nanoplate catalyst with high photocatalytic activity in the decomposition of dyes

Fan

Meng

et al. 2011

Reac Kinet Mech Cat

View full text Add to dashboard Cite

show abstract

“…As the ionic radius of Mo ionic was somewhat smaller than that of Ti ion (Ti 4+ ), the lattice contraction occurred when Ti 4+ was partially substituted by Mo ion in TiO 2 lattice, which resulted in an increase in the phonon frequency . Usually, a blue shift of Raman spectrum is associated with the increase in phonon frequency . This Mo‐doped TiO 2 layer was also helpful to improve the photocatalytic efficiency of the TiO 2 ‐coated Mo powders …”

Section: Resultsmentioning

confidence: 99%

Preparation of TiO₂‐Coated Mo Powders for High Photocatalytic Property

Wang

Luo

et al. 2015

J. Am. Ceram. Soc.

View full text Add to dashboard Cite

An approach is introduced for fabricating the TiO2‐coated molybdenum (Mo) powders via hydrothermal method, in which the Mo nanopowders were prepared by the electric explosion of wire method. The microstructure and photocatalytic properties of the samples were characterized by X‐ray diffraction, scanning electron microscopy, high‐resolution transmission electron microscopy, Raman spectroscopy (Raman), low temperature sorption of nitrogen (BET), and diffuse reflectance accessory of UV–Vis spectrophotometer. It was revealed that compared with pure TiO2, the TiO2‐coated Mo powders exhibited an improved photocatalytic activity, and the highest photocatalytic activity was achieved at the 1 wt% optimal mass percentage of the Mo nanopowders. The preparation of TiO2‐coated Mo powders involved a relatively simple, economical, scalable, and also environment‐friendly approach.

show abstract

“…In the case of Mo-doped TiO 2 , the substitutional Mo is more likely to be a recombination center. Therefore, increasing the doping concentration also increases the number of recombination centers that are present, which lowers the photocatalytic activity [33,40]. The photocatalytic experimental results indicated that most of the TiO 2 /Mo-TiO 2 heterostructures exhibited improved photocatalytic activity over pure TiO 2 and Mo-TiO 2 .…”

Section: Xps Analysismentioning

confidence: 99%

“…The photocatalytic experimental results indicated that most of the TiO 2 /Mo-TiO 2 heterostructures exhibited improved photocatalytic activity over pure TiO 2 and Mo-TiO 2 . As an n-type semiconductor, TiO 2 dominates the electronic conduction due to its oxygen vacancies, which is also true for Mo-TiO 2 [23,33]. During the preparation of composite TiO 2 /Mo-TiO 2 semiconductors, the prepared Mo-TiO 2 powders were fully dispersed into the pure TiO 2 sol, and the two were thoroughly combined through the drying and calcinating processes.…”

Section: Xps Analysismentioning

confidence: 99%

Physiochemical properties of n-n heterostructured TiO₂/Mo-TiO₂ composites and their photocatalytic degradation of gaseous toluene

Cui

Pan

Tang

et al. 2017

Chemical Speciation & Bioavailability

View full text Add to dashboard Cite

The composite TiO 2 /Mo-TiO 2 were prepared by a modified sol-gel method. The prepared catalysts were characterized by X-ray diffraction, BET analysis, SEM, X-ray photoelectron spectroscopy, and UV-vis diffused reflectance spectroscopy techniques. The structural characterization results demonstrated that Mo was successfully doped into the TiO 2 lattice and caused slight changes in the physiochemical properties. The UV-vis DRS showed a red shift of the adsorption edge to the visible region. The photocatalytic decomposition efficiencies of the catalysts were examined with toluene as a typical VOC in a continuous flow reactor. The photocatalytic activity of the n-n heterogeneous TiO 2 /Mo-TiO 2 was greater than that of pure TiO 2 and Mo-TiO 2 , and the catalyst containing a Mo/Ti mole ratio of 2.5% exhibited optimum photocatalytic properties. In general, a relative humidity of 35%, a higher oxygen content, a lower initial toluene concentration, and a higher UV intensity were beneficial for toluene decomposition.

show abstract

Visible-light absorption and photocatalytic activity in molybdenum- and nitrogen-codoped TiO2

Cited by 69 publications

References 26 publications

A novel Ag/BiOBr nanoplate catalyst with high photocatalytic activity in the decomposition of dyes

A novel Ag/BiOBr nanoplate catalyst with high photocatalytic activity in the decomposition of dyes

Preparation of TiO₂‐Coated Mo Powders for High Photocatalytic Property

Physiochemical properties of n-n heterostructured TiO₂/Mo-TiO₂ composites and their photocatalytic degradation of gaseous toluene

Contact Info

Product

Resources

About

Visible-light absorption and photocatalytic activity in molybdenum- and nitrogen-codoped TiO2

Cited by 69 publications

References 26 publications

A novel Ag/BiOBr nanoplate catalyst with high photocatalytic activity in the decomposition of dyes

A novel Ag/BiOBr nanoplate catalyst with high photocatalytic activity in the decomposition of dyes

Preparation of TiO2‐Coated Mo Powders for High Photocatalytic Property

Physiochemical properties of n-n heterostructured TiO2/Mo-TiO2 composites and their photocatalytic degradation of gaseous toluene

Contact Info

Product

Resources

About

Preparation of TiO₂‐Coated Mo Powders for High Photocatalytic Property

Physiochemical properties of n-n heterostructured TiO₂/Mo-TiO₂ composites and their photocatalytic degradation of gaseous toluene