Solvothermal alcoholysis synthesis of hierarchical TiO 2 with enhanced activity in environmental and energy photocatalysis

Bian, Zhenfeng; Zhu, Jian Hua; Li, Hexing

doi:10.1016/j.jphotochemrev.2016.06.002

Cited by 89 publications

(18 citation statements)

References 140 publications

(141 reference statements)

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“…The formation process of an urchin-like yolk–shell superstructure can be explained by a “dissolution–re-nucleation” growth mechanism. , TiO 2 can be etched from its exterior surfaces (due to reaction with NaOH) upon Y@S TiO 2 immersion in alkaline water/alcohol solution, generating sodium titanate. Subsequently, the generated sodium titanate reacts with alcohols to form alkoxy titanates.…”

Section: Resultsmentioning

confidence: 99%

Visible Light CO₂ Reduction to CH₄ Using Hierarchical Yolk@shell TiO_2–xH_x Modified with Plasmonic Au–Pd Nanoparticles

Ziarati

Luque

Dadras

et al. 2020

ACS Sustainable Chem. Eng.

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Engineering of advanced semiconductor photocatalysts for CO 2 conversion to solar fuels is a promising strategy to solve the greenhouse effect and energy crisis. Herein, hierarchical urchin-like yolk@shell TiO 2−x H x decorated with core/shell Au−Pd plasmonic nanoparticles (HUY@S-TOH/AuPd) have been prepared using a multistep process and are employed as an advanced visible light active photocatalyst in CO 2 conversion to CH 4 with a rate of 47 μmol/g cat •h (up to 126 μmol/g cat after 7 h). Different engineered sites in this structure for high gas adsorption, powerful visible light activation, and intense electron transportation are responsible for the observed high photocatalytic CO 2 conversion efficiency. The present smart design process can produce considerable cooperation in not only disclosing the architectural engineering for the improvement of photoconversion efficiency but also disclosing it as a viable and appropriate photocatalytic process to sustainable energy production.

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Section: Resultsmentioning

confidence: 99%

Visible Light CO₂ Reduction to CH₄ Using Hierarchical Yolk@shell TiO_2–xH_x Modified with Plasmonic Au–Pd Nanoparticles

Ziarati

Luque

Dadras

et al. 2020

ACS Sustainable Chem. Eng.

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“…To increase the photocatalytic activity of titanium oxide by enhancing the light absorption, as well as diffusion and adsorption of reagent molecules, an approach related to the production of TiO 2 in the form of a material with a hierarchical morphological structure was proposed [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Biomorphic Fibrous TiO2 Photocatalyst Obtained by Hydrothermal Impregnation of Short Flax Fibers with Titanium Polyhydroxocomplexes

et al. 2020

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A biomimetic solution technology for producing a photocatalytic material in the form of biomorphic titanium oxide fibers with a hierarchical structure using short flax fiber as a biotemplate is proposed. The impregnation of flax fibers intensified under hydrothermal conditions with a precursor was performed in an autoclave to activate the nucleation of the photoactive TiO2 phases. The interaction between precursor and flax fibers was studied by using infrared spectroscopy (IR) and differential scanning calorimetry/thermogravimetry analysis (DSC/TG). The morphology, structure, and textural properties of the TiO2 fibers obtained at annealing temperatures of 500–700 °C were determined by X-ray diffraction analysis, scanning electron microscopy, and nitrogen adsorption/desorption. It is shown that the annealing temperature of the impregnated biotemplates significantly affects the phase composition, crystallite size, and porous structure of TiO2 fiber samples. The photocatalytic activity of the obtained fibrous TiO2 materials was evaluated by using the decomposition of the cationic dye Rhodamine B in an aqueous solution (concentration 12 mg/L) under the influence of ultraviolet radiation (UV). The maximum photodegradation efficiency of the Rhodamine B was observed for TiO2 fibers annealed at 600 °C and containing 40% anatase and 60% rutile. This sample ensured 100% degradation of the dye in 20 min, and this amount significantly exceeds the photocatalytic activity of the commercial Degussa P25 photocatalyst and TiO2 samples obtained previously under hydrothermal conditions by the sol-gel method.

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“…[4][5][6] Photocatalysis is ap otentialt echnology for solving environmental and energy problemsi ncluding degradation of pollutants, H 2 productionvia water splitting and dye-sensitized solar cell, and selective oxidation reactions. [7][8][9][10][11][12] However,t his strategy remains inefficient due to the challenge: difficultiesi ne nergy band configuration limit sunlight utilization to mainly within the ultraviolet and visible light region, resulting in near-infrared light (NIR, 54 %o fs olar radiation at the Earth's surface) unable to be harvested. [13][14][15][16] Meanwhile, photothermal catalysis has attracted more and more attention.…”

Section: Introductionmentioning

confidence: 99%

Surface Plasmon Resonance‐Enhanced Visible‐NIR‐Driven Photocatalytic and Photothermal Catalytic Performance by Ag/Mesoporous Black TiO₂ Nanotube Heterojunctions

Qiao

Sun

et al. 2018

Chemistry An Asian Journal

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Ag/mesoporousb lack TiO 2 nanotubes heterojunctions (Ag-MBTHs) were fabricatedt hrough as urfaceh ydrogenation, wet-impregnation andp hotoreduction strategy. The as-prepared Ag-MBTHs possess ar elativelyh igh specific surface area of % 85 m 2 g À1 anda na verage pore size of % 13.2 nm. The Ag-MBTHs with an arrow band gap of % 2.63 eV extendt he photoresponse from UV to the visiblelight and near-infrared( NIR) region. They exhibit excellent visible-NIR-driven photothermal catalytic and photocatalytic performance for complete conversion of nitro aromatic compounds (100 %) and mineralization of highly toxic phenol (100 %). The enhancement can be attributed to the mesoporous hollow structures increasing the light multi-refraction, the Ti 3 + in frameworks and the surfacep lasmon resonance (SPR) effect of plasmonic Ag nanoparticles favoring light-harvestinga nd spatial separation of photogenerated electronhole pairs, which is confirmed by transientf luorescence. The fabrication of this SPR-enhanced visible-NIR-driven Ag-MBTHs catalyst mayp rovide new insights for designing other high-performanceh eterojunctions as photocatalytic and photothermal catalytic nanomaterials.

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Solvothermal alcoholysis synthesis of hierarchical TiO 2 with enhanced activity in environmental and energy photocatalysis

Cited by 89 publications

References 140 publications

Visible Light CO₂ Reduction to CH₄ Using Hierarchical Yolk@shell TiO_2–xH_x Modified with Plasmonic Au–Pd Nanoparticles

Visible Light CO₂ Reduction to CH₄ Using Hierarchical Yolk@shell TiO_2–xH_x Modified with Plasmonic Au–Pd Nanoparticles

Biomorphic Fibrous TiO2 Photocatalyst Obtained by Hydrothermal Impregnation of Short Flax Fibers with Titanium Polyhydroxocomplexes

Surface Plasmon Resonance‐Enhanced Visible‐NIR‐Driven Photocatalytic and Photothermal Catalytic Performance by Ag/Mesoporous Black TiO₂ Nanotube Heterojunctions

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Solvothermal alcoholysis synthesis of hierarchical TiO 2 with enhanced activity in environmental and energy photocatalysis

Cited by 89 publications

References 140 publications

Visible Light CO2 Reduction to CH4 Using Hierarchical Yolk@shell TiO2–xHx Modified with Plasmonic Au–Pd Nanoparticles

Visible Light CO2 Reduction to CH4 Using Hierarchical Yolk@shell TiO2–xHx Modified with Plasmonic Au–Pd Nanoparticles

Biomorphic Fibrous TiO2 Photocatalyst Obtained by Hydrothermal Impregnation of Short Flax Fibers with Titanium Polyhydroxocomplexes

Surface Plasmon Resonance‐Enhanced Visible‐NIR‐Driven Photocatalytic and Photothermal Catalytic Performance by Ag/Mesoporous Black TiO2 Nanotube Heterojunctions

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Visible Light CO₂ Reduction to CH₄ Using Hierarchical Yolk@shell TiO_2–xH_x Modified with Plasmonic Au–Pd Nanoparticles

Visible Light CO₂ Reduction to CH₄ Using Hierarchical Yolk@shell TiO_2–xH_x Modified with Plasmonic Au–Pd Nanoparticles

Surface Plasmon Resonance‐Enhanced Visible‐NIR‐Driven Photocatalytic and Photothermal Catalytic Performance by Ag/Mesoporous Black TiO₂ Nanotube Heterojunctions