Synthesis of mesoporous Au-TiO2 nanocomposites via a one-pot sol-gel process with enhanced photocatalytic activity

Liu, Juanjuan; Zhou, Yi; Feng, Han; Chen, Decong; Chen, Lingze

doi:10.1016/j.matlet.2017.07.063

Cited by 16 publications

(11 citation statements)

References 14 publications

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“…There are many methods to support the adhesion of Au nanoparticles on the titania surface, such as photodeposition [7], deposition-precipitation [8], as well as the sol-gel method [9,10]. However, the improvement of the photocatalyst activity (PCA) in Au loaded titania is just several times higher than that of the original one.…”

Section: Introductionmentioning

confidence: 99%

Plasma Enhanced Wet Chemical Surface Activation of TiO2 for the Synthesis of High Performance Photocatalytic Au/TiO2 Nanocomposites

Thủy¹,

Tung²,

Manh³

et al. 2020

Applied Sciences

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To enhance the effectiveness of TiO2 as a photocatalyst, it was believed that the drawbacks of the large bandgap and the rapid electron-hole recombination can be overcome by coupling TiO2 with plasmonic metal nanoparticles. The incorporation of the nanoparticles onto the TiO2 surface requires a suitable procedure to achieve the proper particle adhesion. In this work, we propose a simple, clean, and effective surface activation of TiO2 using plasma enhanced wet chemical surface treatment. Under only 5 min of plasma treatment in a 3% NH3/3% H2O2 solution, gold nanoparticles were found better adhered onto the TiO2 surface. Hence, the methylene blue degradation rate of the Au/TiO2 under sunlight treated was improved by a factor of 3.25 times in comparison to non-treated Au/TiO2 and by 13 times in comparison to the bare rutile TiO2.

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Section: Introductionmentioning

confidence: 99%

Plasma Enhanced Wet Chemical Surface Activation of TiO2 for the Synthesis of High Performance Photocatalytic Au/TiO2 Nanocomposites

Thủy¹,

Tung²,

Manh³

et al. 2020

Applied Sciences

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“…[15][16][17][18] Recently,b ecause of their high specific surface area and plentiful interconnected porous networks, some mesoporousp hotocatalysts have been explored for photocatalyzed CO 2 reduction. [23][24][25][26][27][28][29][30] Therefore, with the benefits of ordered mesoporousc hannels and uniformly distributed porosity,o rdered mesoporousT iO 2 (OMT) shows potential as ah ighly promising candidate forp hotocatalysis in the conversion of CO 2 . [23][24][25][26][27][28][29][30] Therefore, with the benefits of ordered mesoporousc hannels and uniformly distributed porosity,o rdered mesoporousT iO 2 (OMT) shows potential as ah ighly promising candidate forp hotocatalysis in the conversion of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…[19][20][21][22] In addition, compared with photocatalysts with disordered mesoporous structures, intensiver esearch efforts have shown that ordered mesoporous materials can effectively separate photoinduced electrons and facilitatet he diffusion of reactants, which leads to enhanced photocatalytic activity. [23][24][25][26][27][28][29][30] Therefore, with the benefits of ordered mesoporousc hannels and uniformly distributed porosity,o rdered mesoporousT iO 2 (OMT) shows potential as ah ighly promising candidate forp hotocatalysis in the conversion of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Recently, because of their high specific surface area and plentiful interconnected porous networks, some mesoporous photocatalysts have been explored for photocatalyzed CO 2 reduction . In addition, compared with photocatalysts with disordered mesoporous structures, intensive research efforts have shown that ordered mesoporous materials can effectively separate photoinduced electrons and facilitate the diffusion of reactants, which leads to enhanced photocatalytic activity . Therefore, with the benefits of ordered mesoporous channels and uniformly distributed porosity, ordered mesoporous TiO 2 (OMT) shows potential as a highly promising candidate for photocatalysis in the conversion of CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Constructing Ordered Three‐Dimensional TiO₂ Channels for Enhanced Visible‐Light Photocatalytic Performance in CO₂ Conversion Induced by Au Nanoparticles

Xue

Wang

Gong

et al. 2018

Chemistry An Asian Journal

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As a typical photocatalyst for CO reduction, practical applications of TiO still suffer from low photocatalytic efficiency and limited visible-light absorption. Herein, a novel Au-nanoparticle (NP)-decorated ordered mesoporous TiO (OMT) composite (OMT-Au) was successfully fabricated, in which Au NPs were uniformly dispersed on the OMT. Due to the surface plasmon resonance (SPR) effect derived from the excited Au NPs, the TiO shows high photocatalytic performance for CO reduction under visible light. The ordered mesoporous TiO exhibits superior material and structure, with a high surface area that offers more catalytically active sites. More importantly, the three-dimensional transport channels ensure the smooth flow of gas molecules, highly efficient CO adsorption, and the fast and steady transmission of hot electrons excited from the Au NPs, which lead to a further improvement in the photocatalytic performance. These results highlight the possibility of improving the photocatalysis for CO reduction under visible light by constructing OMT-based Au-SPR-induced photocatalysts.

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“…Mesoporous structure TiO 2 owns kinds of preparation process mainly including solvothermal method, sol‐gel method, template method, hydrothermal method . Solvothermal method usually dissolves one or more precursor in organic solvent, but the solubility of precursor in organic solvent is not satisfactory.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Spherical TiO₂ with Outstanding Photocatalysis under Visible Light

et al. 2018

ChemistrySelect

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In the paper, mesoporous spherical TiO 2 was synthesized using Ti(SO 4 ) 2 and TiCl 3 as raw materials through one step hydrothermal and calcination method. Good dispersibility and high photocatalytic performance could be obtained without adding any organic dispersant. The preparation process of TiO 2 was simple and high efficient. The grain sizes were 29.0 nm, and the specific surfaces were 99.201 m 2 /g. The photocatalytic efficiency of the prepared samples degrading methyl orange was 1.85 times higher than that of the conventional P25 under visible light. In addition, the reaction mechanism of mesoporous spherical TiO 2 based on experiments was explained.[a] Dr.

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Synthesis of mesoporous Au-TiO2 nanocomposites via a one-pot sol-gel process with enhanced photocatalytic activity

Cited by 16 publications

References 14 publications

Plasma Enhanced Wet Chemical Surface Activation of TiO2 for the Synthesis of High Performance Photocatalytic Au/TiO2 Nanocomposites

Plasma Enhanced Wet Chemical Surface Activation of TiO2 for the Synthesis of High Performance Photocatalytic Au/TiO2 Nanocomposites

Constructing Ordered Three‐Dimensional TiO₂ Channels for Enhanced Visible‐Light Photocatalytic Performance in CO₂ Conversion Induced by Au Nanoparticles

Mesoporous Spherical TiO₂ with Outstanding Photocatalysis under Visible Light

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Synthesis of mesoporous Au-TiO2 nanocomposites via a one-pot sol-gel process with enhanced photocatalytic activity

Cited by 16 publications

References 14 publications

Plasma Enhanced Wet Chemical Surface Activation of TiO2 for the Synthesis of High Performance Photocatalytic Au/TiO2 Nanocomposites

Plasma Enhanced Wet Chemical Surface Activation of TiO2 for the Synthesis of High Performance Photocatalytic Au/TiO2 Nanocomposites

Constructing Ordered Three‐Dimensional TiO2 Channels for Enhanced Visible‐Light Photocatalytic Performance in CO2 Conversion Induced by Au Nanoparticles

Mesoporous Spherical TiO2 with Outstanding Photocatalysis under Visible Light

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Product

Resources

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Constructing Ordered Three‐Dimensional TiO₂ Channels for Enhanced Visible‐Light Photocatalytic Performance in CO₂ Conversion Induced by Au Nanoparticles

Mesoporous Spherical TiO₂ with Outstanding Photocatalysis under Visible Light