Solar to chemical energy conversion using titania nanorod photoanodes augmented by size distribution of plasmonic Au-nanoparticle

Raval, Dhyey; Jani, Margi; Chaliyawala, Harsh A.; Joshi, Anil; Mukhopadhyay, Indrajit; Ray, Abhijit

doi:10.1016/j.matchemphys.2019.04.025

Cited by 8 publications

(6 citation statements)

References 98 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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“…The peak positions for both the Mxene and Anatase phases were in agreement with those reported in the literature [ 93 , 94 , 95 , 96 ]. For the sake of comparison, the XRD pattern of the bare FTO is shown in Figure 6 ; it reveals several peaks, indexed at 2θ = 26.49°, 33.6°, 37.69°, 51.48°, 61.44°, and 65.48°, with identified planes (110), (101), (200), (220), (221), and (301) respectively [ 97 ]. Interestingly, due to the Mxene content following TiCl 4 treatment and the mesoporous layer, the peak of TiO 2 became more prominent, supporting the increased crystallinity and well-grown anatase phase of TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Investigation and Optimization of Mxene Functionalized Mesoporous Titania Films as Efficient Photoelectrodes

Iqbal

Hamdan

2021

Materials

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Three-dimensional mesoporous TiO2 scaffolds of anatase phase possess inherent eximious optical behavior that is beneficial for photoelectrodes used for solar energy conversion applications. In this regard; substantial efforts have been devoted to maximizing the UV and/or visible light absorption efficiency; and suppressing the annihilation of photogenerated charged species; in pristine mesoporous TiO2 structures for improved solar illumination conversion efficiency. This study provides fundamental insights into the use of Mxene functionalized mesoporous TiO2 as a photoelectrode. This novel combination of Mxene functionalized TiO2 electrodes with and without TiCl4 treatment was successfully optimized to intensify the process of photon absorption; charge segregation and photocurrent; resulting in superior photoelectrode performance. The photocurrent measurements of the prepared photoelectrodes were significantly enhanced with increased contents of Mxene due to improved absorption efficiency within the visible region; as verified by UV–Vis absorption spectroscopy. The anatase phase of TiO2 was significantly augmented due to increased contents of Mxene and postdeposition heat treatments; as evidenced by structural analysis. Consequently; an appreciable coverage of well-developed grains on the FTO surface was observed in SEM images. As such; these newly fabricated conductive mesoporous TiO2 photoelectrodes are potential candidates for photoinduced energy conversion and storage applications.

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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%

“…This is a higher value compared to some of the previously tested Au/TiO 2 nanocomposites. [ 149–152 ]…”

Section: Modified Tio2 (Synthesis and Applications)mentioning

confidence: 99%

Recent development and future prospects ofTiO₂photocatalysis

Peiris

Silva

Ranasinghe

et al. 2021

J Chinese Chemical Soc

146

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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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Solar to chemical energy conversion using titania nanorod photoanodes augmented by size distribution of plasmonic Au-nanoparticle

Cited by 8 publications

References 98 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

Investigation and Optimization of Mxene Functionalized Mesoporous Titania Films as Efficient Photoelectrodes

Recent development and future prospects ofTiO₂photocatalysis

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Solar to chemical energy conversion using titania nanorod photoanodes augmented by size distribution of plasmonic Au-nanoparticle

Cited by 8 publications

References 98 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

Investigation and Optimization of Mxene Functionalized Mesoporous Titania Films as Efficient Photoelectrodes

Recent development and future prospects ofTiO2photocatalysis

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Recent development and future prospects ofTiO₂photocatalysis