Copper and Nitrogen co-doped TiO 2 photocatalyst with enhanced optical absorption and catalytic activity

Jaiswal, R.; Bharambe, Jyoti S.; Patel, N.; Dashora, Alpa; Kothari, D.C.; Miotello, A.

doi:10.1016/j.apcatb.2014.12.053

Cited by 226 publications

(112 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The overall gap is little lower (3.21 eV) and the distance from the isolated N p states within the gap to the conduction band is also lower (2.45 eV). The formation of IS, while leaving the conduction band almost unchanged, qualify this system to be an efficient material for the photocatalytic water splitting, similar as in the case of (Cu, N) codoped TiO 2 , for which the photocatalytic efficiency was experimentally verified [45]. i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 4 0 ( 2 0 1 5 ) 9 6 9 6 e9 7 0 3…”

Section: Resultsmentioning

confidence: 94%

Enhancing photocatalytic properties of rutile TiO2 by codoping with N and metals – Ab initio study

Belošević–Čavor

Batalović

Koteski

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

IntroductionThe most efficient way of hydrogen production using solar energy is water splitting induced by solar light. In order to achieve it, a photo-semiconductor capable of absorbing solar energy efficiently is needed. Efficient photocatalysts should satisfy several conditions: suitable band gap (about 2e2.2 eV) for visible light absorption and appropriate band edge potentials for water splitting, capability to separate excited electrons and holes, minimal energy losses during charge transport, chemical stability to corrosion, suitable electron transfer properties from photocatalysts' surface to water and low cost [1,2]. However the applicability of semiconductor photocatalyst is, without any doubt, primarily determined by its electronic structure.Titanium dioxide TiO 2 , in both rutile and anatase form, is one of the most promising photocatalysts. However, the wide energy gaps of pure TiO 2 phases allow efficient absorption of only ultraviolet light and are not suitable for efficient use of solar energy. In this sense, an extensive experimental [3,4] and theoretical [5e14] work has been carried out in order to shift the TiO 2 absorption edge from the UV to the visible-light region and thus increase its efficiency for solar-driven photocatalysis. For achieving that purpose mostly doping with transition metals was used [15e22]. However, the transition metals as dopants can increase the number of carrierrecombination centers and thus reduce the carrier mobility, * Corresponding author. Tel.: þ381 11 3408 549; fax: þ381 11 3408 681. E-mail address: cjeca@vinca.rs (J. Belosevic-Cavor).Available online at www.sciencedirect.com ScienceDirect j ou rnal h ome pag e: www.elsevier.com/loca te/he i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 4 0 ( 2 0 1 5 ) 9 6 9 6 e9 7 0 3http://dx

show abstract

Section: Resultsmentioning

confidence: 94%

Enhancing photocatalytic properties of rutile TiO2 by codoping with N and metals – Ab initio study

Belošević–Čavor

Batalović

Koteski

et al. 2015

International Journal of Hydrogen Energy

View full text Add to dashboard Cite

show abstract

“…The N-doped pathway could form intermediate energy levels in the band gap as a consequence of either mixing N 2p with O 2p states or by introducing localized states. Comparing with single doping, co-doping of metal(s) and non-metal(s) on TiO 2 shows better performances in photocatalysis due to the synergetic effects [22][23][24] of large BET surface area and extended light absorption.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization of Cu, N co-doped TiO2 microspheres with enhanced photocatalytic activities

Liu¹,

Zou²,

Hakala³

et al. 2017

Adv Mater Sci

View full text Add to dashboard Cite

The mesoporous Copper, nitrogen co-doped TiO 2 microspheres was prepared via solvothermal approach, followed by nitriding treatment under an ammonia gas flow. The crystalline structures of the as-prepared catalyst and the chemical compositions of Cu,N co-doped TiO 2 were determined using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) respectively. The photocatalytic activity of the as-prepared sample was investigated by monitoring the degradation of Rhodamine-B under visible light irradiation.Experimental results indicated that mesoporous Cu,N co-doped TiO 2 microspheres showed higher photocatalytic activity than Cu-TiO 2 microspheres and anatase TiO 2 under visible light irradiation. The higher photocatalytic activity of the mesoporous Cu,N co-doped TiO 2 microspheres sample could be attributed to the synergistic effects of large BET surface area, extended light absorption, efficient charge separation which was stabilized by the presence of oxygen vacancies. It was discovered that, valence states maintain stability after nitriding treatment. The sample synthesized from 0.1% molar quantity of Cu dopant, and nitrided at 400℃ for 30 min gave the highest photocatalytic activity.

show abstract

“…The light absorption enhancement of Cu-TiO 2 /PU could be due to the role of the Cu dopants, which defected the TiO 2 lattice, leading to oxygen vacancies and the formation of Ti 3+ in the TiO 2 lattice. The oxygen vacancies could minimize the energy level of the conduction band of the TiO 2 , leading to increasing the light absorption ability of the doped TiO 2 materials [50]. The occurrence of Ti 3+ and copper dopants in the doped TiO 2 lattice (proved in Section 3.2.1) could also create an intermediate band between the valance band and the conduction band of TiO 2 , leading to enhancing the electron-hole pair separation efficiency of TiO 2 and the light absorption enhancement of the Cu-TiO 2 /PU [50].…”

Section: Resultsmentioning

confidence: 99%

“…The oxygen vacancies could minimize the energy level of the conduction band of the TiO 2 , leading to increasing the light absorption ability of the doped TiO 2 materials [50]. The occurrence of Ti 3+ and copper dopants in the doped TiO 2 lattice (proved in Section 3.2.1) could also create an intermediate band between the valance band and the conduction band of TiO 2 , leading to enhancing the electron-hole pair separation efficiency of TiO 2 and the light absorption enhancement of the Cu-TiO 2 /PU [50]. In addition, the copper oxides (CuO and Cu 2 O) that formed on the surface of the TiO 2 layer could combine with TiO 2 to create a suitable semiconductor-semiconductor system.…”

Section: Resultsmentioning

confidence: 99%

The advanced removal of benzene from aerosols by photocatalytic oxidation and adsorption of Cu–TiO 2 /PU under visible light irradiation

Pham

Lee

2016

Applied Catalysis B: Environmental

104

View full text Add to dashboard Cite

Copper and Nitrogen co-doped TiO 2 photocatalyst with enhanced optical absorption and catalytic activity

Cited by 226 publications

References 36 publications

Enhancing photocatalytic properties of rutile TiO2 by codoping with N and metals – Ab initio study

Enhancing photocatalytic properties of rutile TiO2 by codoping with N and metals – Ab initio study

Synthesis, characterization of Cu, N co-doped TiO2 microspheres with enhanced photocatalytic activities

The advanced removal of benzene from aerosols by photocatalytic oxidation and adsorption of Cu–TiO 2 /PU under visible light irradiation

Contact Info

Product

Resources

About