Self-doping for visible light photocatalytic purposes: construction of SiO2/SnO2/SnO2:Sn2+nanostructures with tunable optical and photocatalytic performance

Sun, Menglin; Su, Yiguo; Du, Chunfang; Zhao, Qihang; Liu, Zhiliang

doi:10.1039/c4ra04356a

Cited by 42 publications

(21 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Sn-1, 2.47 eV corresponds to the energy of Sn 2+ 5s in Sn 3 O 4 , and 2.24 eV is to the energy of Sn 2+ 5s in SnO 2. Similar observation was reported, such as the values of 2.53 eV for defected SnO 2 [16], SnO (2.53 eV) [17] and SiO 2 /SnO 2 /SnO 2 :Sn 2+ nanomaterials [18]. As reported, self-doping of SnO 2−x nanocrystals with Sn 2+ red-shift their absorption to the visible region and simultaneously produces oxygen vacancies, which can effectively scavenge photogenerated holes and thus enable the color switching of redox dyes using visible light [19].…”

Section: Resultssupporting

confidence: 87%

SnO_x@β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

Zheng

Zeng

Xia

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

To improve the effective separation of the photogenerated electrons and holes, SnO x @β-SnO composites on titanium meshes were prepared by using a standard one-step hydrothermal procedure. As photoanodes in photoelectrochemical cell, the SnO x @β-SnO composites exhibited a photocurrent density of 150 μA cm −2 at 0.0 V versus Ag/AgCl under visible light illumination. The improved photocurrent can be explained as, the Sn 2+ 5s impurity states in SnO 2 have a band gap energy of 2.24 eV, SnO x @β-SnO composites construct a type-II heterojunction. And titanium meshes have a good conductivity, which is beneficial to transferring electron from the conduction band of SnO 2 to external circuit. Furthermore, the SnO x @β-SnO heterostructures have a larger electrochemical specific surface area, and stronger light absorption from 350-800 nm.

show abstract

Section: Resultssupporting

confidence: 87%

SnO_x@β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

Zheng

Zeng

Xia

et al. 2020

Mater. Res. Express

View full text Add to dashboard Cite

show abstract

“…Meanwhile, the photocatalytic activity was improved with the addition of CCl 4 . This may be due to the separation efficiency of photogenerated carriers that was enhanced with the addition of CCl 4 as the electron scavenger, and then more holes and the corresponding active species were participated in the photocatalytic reaction, which would improve the degradation rate [72]. Based on the above result, the main active species in the photocatalytic decomposition of MO were included the oxidation reaction of the holes which generated in the valence and the formed O 2 −• and OH • on the surface of semiconductor.…”

Section: Resultsmentioning

confidence: 99%

Steering Charge Kinetics of Tin Niobate Photocatalysts: Key Roles of Phase Structure and Electronic Structure

et al. 2018

Self Cite

View full text Add to dashboard Cite

Tin niobate photocatalysts with the phase structures of froodite (SnNb2O6) and pyrochlore (Sn2Nb2O7) were obtained by a facile solvothermal method in order to explore the impact of phase structure and electronic structure on the charge kinetics and photocatalytic performance. By employing tin niobate as a model compound, the effects of phase structure over electronic structure, photocatalytic activity toward methyl orange solution and hydrogen evolution were systematically investigated. It is found that the variation of phase structure from SnNb2O6 to Sn2Nb2O7 accompanied with modulation of particle size and band edge potentials that has great consequences on photocatalytic performance. In combination with the electrochemical impedance spectroscopy (EIS), transient photocurrent responses, transient absorption spectroscopy (TAS), and the analysis of the charge-carrier dynamics suggested that variation of electronic structure has great impacts on the charge separation and transfer rate of tin niobate photocatalysts and the subsequent photocatalytic performance. Moreover, the results of the X-ray photoelectron spectroscopy (XPS) indicated that the existent of Sn4+ species in Sn2Nb2O7 could result in a decrease in photocatalytic activity. Photocatalytic test demonstrated that the SnNb2O6 (froodite) catalyst possesses a higher photocatalytic activity toward MO degradation and H2 evolution compared with the sample of Sn2Nb2O7 (pyrochlore). On the basis of spin resonance measurement and trapping experiment, it is expected that photogenerated holes, O2−•, and OH• active species dominate the photodegradation of methyl orange.Electronic supplementary materialThe online version of this article (10.1186/s11671-018-2578-2) contains supplementary material, which is available to authorized users.

show abstract

“…Currently, self-doping has increasingly captured people's attention for it could tune the electronic structures and extend the photo response range, thereby enhancing the photocatalytic activity of semiconductors without introducing foreign elements [22][23][24][25][26]. It was successfully utilized in TiO 2 , C 3 N 4 , BiOI modification and enhanced their photocatalytic activity observably under visible light irradiation by altering their electronic structures [27][28][29].…”

Section: Introductionmentioning

confidence: 98%

Self doping promoted photocatalytic removal of no under visible light with bi2moo6: Indispensable role of superoxide ions

Ding

Shang

et al. 2016

Applied Catalysis B: Environmental

169

View full text Add to dashboard Cite

Self-doping for visible light photocatalytic purposes: construction of SiO₂/SnO₂/SnO₂:Sn²⁺nanostructures with tunable optical and photocatalytic performance

Cited by 42 publications

References 49 publications

SnO_x@β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

SnO_x@β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

Steering Charge Kinetics of Tin Niobate Photocatalysts: Key Roles of Phase Structure and Electronic Structure

Self doping promoted photocatalytic removal of no under visible light with bi2moo6: Indispensable role of superoxide ions

Contact Info

Product

Resources

About

Self-doping for visible light photocatalytic purposes: construction of SiO2/SnO2/SnO2:Sn2+nanostructures with tunable optical and photocatalytic performance

Cited by 42 publications

References 49 publications

SnO x @β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

SnO x @β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

Steering Charge Kinetics of Tin Niobate Photocatalysts: Key Roles of Phase Structure and Electronic Structure

Self doping promoted photocatalytic removal of no under visible light with bi2moo6: Indispensable role of superoxide ions

Contact Info

Product

Resources

About

Self-doping for visible light photocatalytic purposes: construction of SiO₂/SnO₂/SnO₂:Sn²⁺nanostructures with tunable optical and photocatalytic performance

SnO_x@β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell

SnO_x@β–SnO heterostructures and their enhanced photocurrent in photoelectrochemical cell