Same titanium glycolate precursor but different products: successful synthesis of twinned anatase TiO<sub>2</sub> nanocrystals with excellent solar photocatalytic hydrogen evolution capability

Cheng, Gang; Wei, Yi; Xiong, Jinyan; Gan, Yixin; Zhu, Jiaxin; Xu, Feifan

doi:10.1039/c7qi00278e

Cited by 42 publications

(15 citation statements)

References 48 publications

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“…Extensive attempts have also been made to develop appropriate titanium precursors for the preparation TiO2 with tuneable phases and structures using simple experimental procedures [30]. A one-pot and template-free strategy for synthesizing hollow TiO2 nanostructures using Cp2TiCl2 as the titanium source has been described [31].…”

Section: Introductionmentioning

confidence: 99%

Crystalline bis(η⁵-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Baul

Manne

Tiekink

2018

Journal of Coordination Chemistry

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Five titanocene(IV) carboxylates of the general formula Cp2Ti(O2CR)2 viz., [Ti( 5-C5H5)2(O2CC6H5-4-CH3)2] (1), [Ti( 5-C5H5)2(O2CC4H3-2-O)2] (2), [Ti( 5-C5H5)2(O2CC4H3-3-O)2] (3), [Ti( 5-C5H5)2(O2CC(CH3)3)2] (4) and [Ti( 5-C5H5)2(O2C(CH)C(CH3)3)2] (5) have been synthesized. All the titanocene(IV) carboxylates have been characterized by IR, 1 H and 13 C NMR spectroscopic techniques, and the crystal and molecular structures of 1-5 have been determined by single crystal X-ray crystallography. The structures present similar features with monodentate carboxylate ligands and tetrahedral Ti centres, assuming the each Cp ring occupies one position only. The differences in the structures relate primarily to the relative orientations of the carboxylate ligands. In the molecular packing, non-conventional Cp-C-H … O(carbonyl) hydrogen bonds are observed in each case and lead to supramolecular chains in each of 1, 4 and 5. In 2, the 2-furyl-O atoms also participate in C-H … O interactions leading to a two-dimensional array. Finally, in 3, a two-dimensional array arises as a result of Cp-C-H … O(carbonyl) and 3-furyl-C-H … O(carbonyl) interactions. As representative example, compound 3 was used as starting material for the synthesis of TiO2 nanoparticles. 2 An effective and simple wet-chemical method involving calcination and ultrasonication route has been suggested for obtaining pure anatase TiO2 NPs, which were confirmed from the powder XRD and imaging techniques such as SEM, TEM and EDS.

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Section: Introductionmentioning

confidence: 99%

Crystalline bis(η⁵-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Baul

Manne

Tiekink

2018

Journal of Coordination Chemistry

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“…further confirms that the WO 3 -Cu hybrids are successfully synthesized. The valence band (E VB ) and conduction band (E CB ) edge of WO 3 sample at the point of zero charge can be calculated by the empirical equation E VB = X-E e +0.5E g , where X is the electronegativity of the semiconductor, E e is the energy of free electrons on the hydrogen scale (about 4.5 eV), E g is the band gap energy of the semiconductor, and E CB can be determined by E CB =E VB -E g [20][21][22][23] . Based on the above equation and the DRS spectra, the E CB and E VB of WO 3 sample were calculated to be 0.83 and 3.38 eV.…”

Section: Resultsmentioning

confidence: 99%

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Xiong¹,

Luo²,

Zhao³

et al. 2021

Journal of Inorganic Materials

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Non-noble metal decoration is a promising strategy for promoting semiconductor photocatalysis by effectively enhancing charge separation. Cube-like WO 3-Cu hybrid was successfully synthesized by a facile ascorbic acid reduction method at room temperature. The composition and morphology characterization showed that the Cu particle was deposited on the surface of WO 3 nanocube. The WO 3-Cu-1.0 hybrid (when 1.0 mmol CuSO 4 •5H 2 O was involved into the reaction system) exhibited promoted photocatalytic capability towards Congo Red photodegradation under simulated sun light irradiation. The trapping experiments of active species during photocatalysis and ESR spectra of DMPO•OH signal of WO 3-Cu-1.0 composite confirmed that the photogenerated holes (h +), •OH, and •O 2 were the predominant active species during Conge Red degradation. Based on the photo/electro-chemical measurements, it was proposed that efficient charge transfer was accomplished between the WO 3 nanocube and Cu nanoparticles, which promoted electron-holes separation and subsequently photocatalysis reaction in the Congo Red solution. This work provides a facile preparation method for a binary photocatalyst system in which a semiconductor coupled with non-noble metal.

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“…Hydrogen evolution from solar‐driven water splitting is a promising way to convert solar energy to chemical energy . Different strategies for light‐driven water splitting had been widely proposed . As an alternative approach, photocatalytic technology that uses solar energy as the direct driving force provides another good solution for this, because it potentially enables much simpler and more economically competitive systems to achieve H 2 production.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

et al. 2019

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Solar-to-hydrogen production is one of the most promising solutions for global energy shortages and the environmental crisis because it utilizes solar energy to the fullest extent. Photocatalytically splitting water to hydrogen involves three crucial processes: solar light harvesting, charge separation/migration, and the catalytic H 2 production reaction. In the past few years, much attention is paid to investigating noble metal cocatalysts for solar photoreduction, but much less attention is paid to transition metal-based cocatalysts. Nevertheless, great and significant advances are achieved using a copperbased cocatalyst for solar-to-hydrogen evolution, as it possesses a suitable binding energy for the hydrogen intermediate according to density functional theory calculations. This review summarizes recent studies and progress on the copper-based cocatalytic materials as well as discusses the roles and functional mechanisms for photocatalytic H 2 evolution. It begins with discussing basic principles for the use of cocatalysts for photocatalytic hydrogen evolution and points out opportunities to use non-noble metal cocatalysts for hydrogen evolution. Then, it explains the construction and structural features of a photocatalysis system with semiconductor-Cu-based cocatalyst, and how the functional mechanisms work to enhance the hydrogenproduction-related reactions. Finally, some challenges and perspectives are also given to promote further exploration of this emerging research area. Usually, the following three parts are considered: 1) improving

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Same titanium glycolate precursor but different products: successful synthesis of twinned anatase TiO₂ nanocrystals with excellent solar photocatalytic hydrogen evolution capability

Abstract: Exploiting a synthesis protocol to tailor TiO2 with a unique morphology and crystal phase has received considerable interest in the energy and environmental fields.

Cited by 42 publications

References 48 publications

Crystalline bis(η⁵-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Crystalline bis(η⁵-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

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Same titanium glycolate precursor but different products: successful synthesis of twinned anatase TiO2 nanocrystals with excellent solar photocatalytic hydrogen evolution capability

Abstract: Exploiting a synthesis protocol to tailor TiO2 with a unique morphology and crystal phase has received considerable interest in the energy and environmental fields.

Cited by 42 publications

References 48 publications

Crystalline bis(η5-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Crystalline bis(η5-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Facilely Anchoring Cu nanoparticles on WO3 Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer

Recent Advances in Cu‐Based Cocatalysts toward Solar‐to‐Hydrogen Evolution: Categories and Roles

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Same titanium glycolate precursor but different products: successful synthesis of twinned anatase TiO₂ nanocrystals with excellent solar photocatalytic hydrogen evolution capability

Crystalline bis(η⁵-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Crystalline bis(η⁵-cyclopentadienyl)bis(benzoato/carboxylato)titanium(IV) precursor-directed route to functional titanium dioxide nanomaterials

Facilely Anchoring Cu nanoparticles on WO₃ Nanocubes for Enhanced Photocatalysis through Efficient Interface Charge Transfer