Hierarchical TiO<sub>2</sub> nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting

Duan, Yanyan; Zhou, Shaochen; Chen, Zhihong; Luo, Jianmin; Zhang, Mei; Wang, Fu; Xu, Tao; Wang, Chuanyi

doi:10.1039/c7cy02641b

Cited by 34 publications

(24 citation statements)

References 58 publications

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“…In the 20-Au/TiO 2 NF photoelectrodes, there may have been too many Au NPs on the TiO 2 surface, which negatively affected PEC performance. The obtained efficiency of 0.52% for 15-Au/TiO 2 NFs photoelectrodes was comparable to or even better than those of previous reports for Au/TiO 2 nanostructures [27,28,30,31].…”

Section: Resultssupporting

confidence: 80%

Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

et al. 2020

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High-stability, high-efficiency, and low-cost solar photoelectrochemical (PEC) water splitting has great potential for hydrogen-energy applications. Here, we report on gold/titanium dioxide (Au/TiO2) nanofiber structures grown directly on a conductive indium tin oxide substrate, and used as photoelectrodes in PEC cells for hydrogen generation. The titanium dioxide nanofibers (TiO2 NFs) are synthesized using electrospinning, and are surface-modified by the deposition of gold nanoparticles (Au NPs) using a simple photoreduction method. The structure and morphology of the materials were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The surface plasmon resonance (SPR) of the Au NPs was investigated by ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy. The PEC properties of the as-prepared photoelectrodes were measured. The obtained photoconversion efficiency of 0.52% under simulated-sunlight illumination by a 150 W xenon lamp of the Au/TiO2 NFs structure with 15 min UV irradiation for Au NP deposition was the highest value from comparable structures. Working photoelectrode stability was tested, and the mechanism of the enhanced PEC performance is discussed.

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Section: Resultssupporting

confidence: 80%

Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

et al. 2020

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“…In such measurements, the slope of the current density vs. scan rate can be related to the double layer capacitance, which is directly proportional to the ECSA. 31 Based on the obtained results, Mo:TiO 2 -700 possesses the highest surface area (C dl ¼ 0.10 mF cm À2 ), whereas TiO 2 -650 is the sample with the smallest surface area (C dl ¼ 0.01 mF cm À2 ). These results agree well with SEM images, where grainrice-shaped nanostructures and porosity are observed for Mo:TiO 2 -700 ( Fig.…”

Section: Characterizationmentioning

confidence: 85%

“…30 Dj is equal to (j a -j c ), where j a and j c are the anodic and cathodic current densities, respectively, in this case taken at 0.1 V Ag/AgCl in the CV scans. 31 Conduction and valence band (CB & VB) positions were measured from CV curves recorded in acetonitrile containing 0.1 M of tetrabutylammonium hexauorophosphate (TBAPF 6 ) at a scan rate of 50 mV s À1 and using the following formula: [32][33][34]…”

Section: Characterizationmentioning

confidence: 99%

Mo-doped TiO₂photoanodes using [Ti₄Mo₂O₈(OEt)₁₀]₂bimetallic oxo cages as a single source precursor

Regue

Armstrong

Walsh

et al. 2018

Sustainable Energy Fuels

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“…This is a higher value compared to some of the previously tested Au/TiO 2 nanocomposites. [149][150][151][152] Overall, it is clear that Au-modified TiO 2 owns the capacity to be employed in a vast array of applications such as photo-oxidation of organic molecules, removal of industrial effluents from natural water bodies, and solar energy conversion strategies. Altogether, it is understood from the reviewed studies that incorporation of Au has intensified the photocatalytic activity of TiO 2 to a remarkable stage.…”

Section: Modified Tio 2 (Synthesis and Applications)mentioning

confidence: 99%

Recent development and future prospects ofTiO₂photocatalysis

Peiris

Silva

Ranasinghe

et al. 2021

J Chinese Chemical Soc

149

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Photocatalysis is a process of clean technology where solar energy is converted into useful chemical reactions. There are confronted challenges and limitations when claiming the most efficient TiO 2 photocatalytic activity. Scientists tend to break through the barriers of TiO 2 photocatalysis by implementing different modification strategies for pure TiO 2 in order to eliminate the encountered limitations and thereby enhance the efficiency for further development of photocatalytic applications. Charge carrier recombination is one of the major limitations in the photocatalytic process. Doping incorporated with metals and nonmetals owns the capacity to subdue the recombination of photogenerated electrons and holes by ensuring charge carrier separation. At the same time, this could enhance the capturing of photoenergy by narrowing the band gap of TiO 2 . Dye sensitization is another branch of possible modification of TiO 2 photocatalysis that is implemented in solar electricity generation, photocatalytic water splitting, and pollutant degradation. It assists in reduction of transparency in the visible range and obtaining a longer electron lifetime by efficient charge separation. Attention is given to the application of TiO 2 photocatalysis based on environmental decontamination, biocidal applications, and energybased applications. Hence, TiO 2 photocatalysis plays a crucial role in reaching higher technological development while maintaining a balance with environmental sustainability.

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Hierarchical TiO₂ nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting

Abstract: The 3D architecture of H-TiO2 and incorporation of Au NPs contribute to the excellent PEC performance of Au/H-TiO2-based photoanodes.

Cited by 34 publications

References 58 publications

Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

Mo-doped TiO₂photoanodes using [Ti₄Mo₂O₈(OEt)₁₀]₂bimetallic oxo cages as a single source precursor

Recent development and future prospects ofTiO₂photocatalysis

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Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting

Abstract: The 3D architecture of H-TiO2 and incorporation of Au NPs contribute to the excellent PEC performance of Au/H-TiO2-based photoanodes.

Cited by 34 publications

References 58 publications

Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

Surface-Modified Titanium Dioxide Nanofibers with Gold Nanoparticles for Enhanced Photoelectrochemical Water Splitting

Mo-doped TiO2photoanodes using [Ti4Mo2O8(OEt)10]2bimetallic oxo cages as a single source precursor

Recent development and future prospects ofTiO2photocatalysis

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Hierarchical TiO₂ nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting

Mo-doped TiO₂photoanodes using [Ti₄Mo₂O₈(OEt)₁₀]₂bimetallic oxo cages as a single source precursor

Recent development and future prospects ofTiO₂photocatalysis