Effect of aspect ratios of rutile TiO2 nanorods on overall photocatalytic water splitting performance

Correction for ‘Effect of aspect ratios of rutile TiO2 nanorods on overall photocatalytic water splitting performance’ by Bing Fu et al., Nanoscale, 2020, DOI: 10.1039/c9nr10870j.

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Experimental and first-principles studies of BiVO4/BiV1-xMnxO4-y n-n+ homojunction for efficient charge carrier separation in sunlight induced water splitting

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2018.06.133 ◽

2018 ◽

Vol 43 (33) ◽

pp. 15815-15822 ◽

Cited By ~ 2

Author(s):

Anupam Srivastav ◽

Pawan Kumar ◽

Anuradha Verma ◽

York R. Smith ◽

Vibha Rani Satsangi ◽

...

Keyword(s):

Charge Carrier ◽

Water Splitting ◽

First Principles ◽

Efficient Charge ◽

Carrier Separation

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Copper-Graphene-TiO2 Hybrid Materials for Photocatalytically Assisted H2 Generation

10.26434/chemrxiv.12053076 ◽

2020 ◽

Author(s):

David Maria Tobaldi ◽

Kamila Koci ◽

Miroslava Edelmannova ◽

Luc Lajaunie ◽

Bruno Figueiredo ◽

...

Keyword(s):

Titanium Dioxide ◽

Charge Carrier ◽

Visible Light ◽

Water Splitting ◽

Hydrogen Generation ◽

Fold Increase ◽

Photocatalytic Water Splitting ◽

Photocatalytic Hydrogen Generation ◽

Spatial Charge ◽

Carrier Separation

Hydrogen, as energy carrier, is a zero-emission fuel. Being green and clean, it is considered to play an important role in energy and environmental issues. Photocatalytic water splitting is a process used to generate hydrogen from the dissociation of water. Titanium dioxide is still the archetype material for photocatalytic water splitting. However, because of the fast recombination of the photo-generated exciton, the yield of the reaction is typically low. In this work, we have modified the surface of titanium dioxide with copper and copper/graphene to sensitise it to visible light, and to increase the spatial charge carrier separation, thus extending the quantum yield of H2 production from methanol/water mixtures. Results showed that, in the analysed system, exists an optimum amount of copper plus graphene (i.e. 0.5 mol% copper plus 0.5 wt% graphene) to grant a two-fold increase in the photocatalytic hydrogen generation compared to that of bare titania. That system proved itself to be complex and dynamic. This was attributed to the increased spatial charge carrier separation exploited by graphene (under 365 and 405 nm irradiation), and to the continuous reduction of Cu(II) to Cu(I) due to IFCT that has proven to be an excellent visible-light sensitiser in the copper/graphene-titania system.Hybrid titania-copper-graphene materials could therefore be exploited in the field of light-to-energy applications.

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Copper-Graphene-TiO2 Hybrid Materials for Photocatalytically Assisted H2 Generation

10.26434/chemrxiv.12053076.v1 ◽

2020 ◽

Author(s):

David Maria Tobaldi ◽

Kamila Koci ◽

Miroslava Edelmannova ◽

Luc Lajaunie ◽

Bruno Figueiredo ◽

...

Keyword(s):

Titanium Dioxide ◽

Charge Carrier ◽

Visible Light ◽

Water Splitting ◽

Hydrogen Generation ◽

Fold Increase ◽

Photocatalytic Water Splitting ◽

Photocatalytic Hydrogen Generation ◽

Spatial Charge ◽

Carrier Separation

Hydrogen, as energy carrier, is a zero-emission fuel. Being green and clean, it is considered to play an important role in energy and environmental issues. Photocatalytic water splitting is a process used to generate hydrogen from the dissociation of water. Titanium dioxide is still the archetype material for photocatalytic water splitting. However, because of the fast recombination of the photo-generated exciton, the yield of the reaction is typically low. In this work, we have modified the surface of titanium dioxide with copper and copper/graphene to sensitise it to visible light, and to increase the spatial charge carrier separation, thus extending the quantum yield of H2 production from methanol/water mixtures. Results showed that, in the analysed system, exists an optimum amount of copper plus graphene (i.e. 0.5 mol% copper plus 0.5 wt% graphene) to grant a two-fold increase in the photocatalytic hydrogen generation compared to that of bare titania. That system proved itself to be complex and dynamic. This was attributed to the increased spatial charge carrier separation exploited by graphene (under 365 and 405 nm irradiation), and to the continuous reduction of Cu(II) to Cu(I) due to IFCT that has proven to be an excellent visible-light sensitiser in the copper/graphene-titania system.Hybrid titania-copper-graphene materials could therefore be exploited in the field of light-to-energy applications.

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Efficient and stable charge transfer channels for photocatalytic water splitting activity of CdS without sacrificial agents

Journal of Materials Chemistry A ◽

10.1039/d0ta06177h ◽

2020 ◽

Vol 8 (40) ◽

pp. 20963-20969 ◽

Cited By ~ 5

Author(s):

Wei Chen ◽

Guo-Bo Huang ◽

Hao Song ◽

Jian Zhang

Keyword(s):

Charge Transfer ◽

Water Splitting ◽

Photocatalytic Water Splitting ◽

Transfer Channel ◽

Efficient Charge ◽

Transfer Channels

An efficient charge transfer channel for improving the photocatalytic water splitting activity and durability of CdS without sacrificial agents.

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Rolling the WSSe Bilayer into Double-Walled Nanotube for the Enhanced Photocatalytic Water-Splitting Performance

Nanomaterials ◽

10.3390/nano11030705 ◽

2021 ◽

Vol 11 (3) ◽

pp. 705

Author(s):

Lin Ju ◽

Jingzhou Qin ◽

Liran Shi ◽

Gui Yang ◽

Jing Zhang ◽

...

Keyword(s):

Water Splitting ◽

Density Functional ◽

Transition Metal Dichalcogenides ◽

Density Functional Theory Calculations ◽

Stable Configuration ◽

Photocatalytic Water Splitting ◽

Stacking Pattern ◽

Metal Dichalcogenides ◽

Photocatalytic Performances ◽

Carrier Separation

For the emerging Janus transition metal dichalcogenides (TMD) layered water-splitting photocatalysts, stacking the monolayers to form bilayers has been predicted to be an effective way to improve their photocatalytic performances. To achieve this, the stacking pattern plays an important role. In this work, by means of the density functional theory calculations, we comprehensively estimate energetical stability, light absorption and redox capacity of Janus WSSe bilayer with different stacking patterns. Unfortunately, the Janus WSSe bilayer with the most stable configuration recover the out-of-plane symmetry, which is not in favor of the photocatalytic reactions. However, rolling the Janus WSSe bilayer into double-walled nanotube could stabilize the appropriate stacking pattern with an enhanced instinct dipole moment. Moreover, the suitable band edge positions, high visible light absorbance, outstanding solar-to-hydrogen efficiency (up to 28.48%), and superior carrier separation promise the Janus WSSe double-walled nanotube the potential for the photocatalytic water-splitting application. Our studies not only predict an ideal water-splitting photocatalyst, but also propose an effective way to improve the photocatalytic performances of Janus layered materials.

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