Sunlight driven photoelectrochemical light-to-electricity conversion of screen-printed surface nanostructured TiO 2 decorated with plasmonic Au nanoparticles

Moakhar, Roozbeh Siavash; Masudy‐Panah, Saeid; Jalali, Mahsa; Goh, Gregory K. L.; Ghorbani, Mohammad; Riahi-Noori, Nastaran

doi:10.1016/j.electacta.2016.10.022

Cited by 19 publications

(10 citation statements)

References 45 publications

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“…Also, the improvement trend of photocurrent density for each photoanode was similar, evidencing the important role of rGO and Au TNPs in enhancing the PEC performance. In addition, the theoretical photoconversion efficiency (η) ,, of each photoanode based on the current–voltage curve as a function of applied voltage was calculated, and is shown in Figure S10, with the detailed calculation shown in the Supporting Information. The Au TNPs/rGO/TiO 2 b-NRs electrode exhibited a maximum photoconversion efficiency of 0.33% at 0.6 V (vs RHE), which was remarkably higher than those of Au TNPs/TiO 2 b-NRs (0.26%), rGO/TiO 2 b-NRs (0.22%), TiO 2 b-NRs (0.13%), and TiO 2 NRs (0.05%) at the same potential.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, they could also enhance the photocatalytic performance in a nonradiative way via hot electron generation and injection to the conduction band of the semiconductor . Among these metallic nanoparticles, Au nanoparticles have been widely used to improve the response of TiO 2 in the visible region. − For example, Pu et al demonstrated that TiO 2 nanowire arrays decorated with a mixture of Au nanospheres and nanorods (NRs) showed an enhanced photoresponse in the entire UV–visible region due to electric field amplification and hot electron generation by the Au nanoparticles . In addition, Su et al reported that Au nanoparticles attached to TiO 2 branched nanorod (b-NR) arrays could achieve prominent photocurrent compared to pristine TiO 2 under either visible light (≥420 nm) or simulated solar light.…”

Section: Introductionmentioning

confidence: 99%

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Photocurrent Enhancements of TiO₂-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Chen

Nagao

et al. 2019

J. Phys. Chem. C

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In this work, we studied three-dimensional (3D) highly branched TiO2 nanorod (b-NR) arrays decorated with plasmonic Au triangular nanoprisms (TNPs) and reduced graphene oxide (rGO) sheets for photoelectrochemical (PEC) water oxidation. The photocurrent densities of rGO/TiO2 b-NRs and Au TNPs/rGO/TiO2 b-NRs exhibited 21 and 90% enhancements, respectively, compared to bare TiO2 b-NRs at 0.5 V (vs Ag/AgCl). Incident photon-to-electron conversion efficiency measurements revealed the synergistic effects of plasmonic Au TNPs and rGO on the enhancement of photocurrent response, especially in the visible region. The electrochemical impedance spectroscopy analysis provided further evidence that the charge transport resistance between TiO2 photoanode and electrolyte was greatly reduced with the incorporation of Au TNPs and rGO. It is suggested that the plasmonic Au TNPs exhibiting localized surface plasmon resonances at 560 and 660 nm to enhance the visible light absorption, rGO with superior electron conductivity, and 3D TiO2 b-NR arrays with large surface area and high carrier mobility synergistically contribute to the high PEC performance. Our results of the facile decoration of Au TNPs and rGO sheets could arouse great interest in PEC water splitting reaction and aid in the evaluation of other photoanodes.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocurrent Enhancements of TiO₂-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Chen

Nagao

et al. 2019

J. Phys. Chem. C

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“…[ 29–33 ] To begin with, the high solar‐to‐hydrogen (STH) efficiency can be achieved by incorporating narrow‐bandgap semiconductors with high ability of visible light harvesting, enhanced charge carrier (electron–hole) separation, and suitable bandgap position for performing water splitting half oxidation/reduction reactions. [ 34–39 ] Moreover, developing stable photoelectrodes with high resistance against photo‐corrosion is an important feature that should be taken into account. In addition to the physical properties of suitable semiconductors, developing inexpensive materials and electrodes is a major prerequisite for PEC water splitting.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

et al. 2021

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The cost‐effective, robust, and efficient electrocatalysts for photoelectrochemical (PEC) water‐splitting has been extensively studied over the past decade to address a solution for the energy crisis. The interesting physicochemical properties of CuO have introduced this promising photocathodic material among the few photocatalysts with a narrow bandgap. This photocatalyst has a high activity for the PEC hydrogen evolution reaction (HER) under simulated sunlight irradiation. Here, the recent advancements of CuO‐based photoelectrodes, including undoped CuO, doped CuO, and CuO composites, in the PEC water‐splitting field, are comprehensively studied. Moreover, the synthesis methods, characterization, and fundamental factors of each classification are discussed in detail. Apart from the exclusive characteristics of CuO‐based photoelectrodes, the PEC properties of CuO/2D materials, as groups of the growing nanocomposites in photocurrent‐generating devices, are discussed in separate sections. Regarding the particular attention paid to the CuO heterostructure photocathodes, the PEC water splitting application is reviewed and the properties of each group such as electronic structures, defects, bandgap, and hierarchical structures are critically assessed.

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“…The indirect optical band-gap energies of the substrate, Peony-like MoS 2 , and Peony-like 3D MoS 2 /Au were found to be 3.00, 1.28, and 1.04 eV, respectively. The smaller band gap of Peony-like 3D MoS 2 /Au (80 s) can be ascribed to the UV absorbance by the supported Au NPs via electron interband transitions from 5d to 6sp. , …”

Section: Results and Discussionmentioning

confidence: 99%

Nanopattern-Assisted Direct Growth of Peony-like 3D MoS₂/Au Composite for Nonenzymatic Photoelectrochemical Sensing

Jalali

Moakhar

Abdelfattah

et al. 2020

ACS Appl. Mater. Interfaces

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The chalcogenide material MoS 2 has been recognized as a promising candidate for photoelectrochemical (PEC) applications due to its enhanced photocatalytic and electrocatalytic activities. However, few reports have been focused on the designated catalytic MoS 2 for the nonenzymatic PEC sensing of small molecules. Here, we report on a novel in situ and fab-free method for the direct growth of three-dimensional (3D) porous Peony-like MoS 2 nanosheets supported by nanohole-patterned TiO 2 and composited with gold deposits. The direct growth resulted in enhanced electrical conductivity between the substrate and 3D-standing MoS 2 nanosheets and thus the uniform distribution of gold electrodeposits from the MoS 2 lattice. The hybrid 3D MoS 2 /gold nanocomposite demonstrated enhanced abundance of exposed catalytic edge sites and improved optic and electrical coupling, which ultimately led to excellent photoelectrochemical activities. We performed full characterization of the morphology, crystallinity, lattice configuration, and optical properties of hybrid MoS 2 nanosheets via field emission scanning microscope, high-resolution transmission electron microscopy, and energy-dispersive X-ray, Raman, and UV−vis spectroscopies. The 3D COMSOL simulation also confirmed enhanced electric field distribution at the interface of the proposed 3D MoS 2 /gold nanocomposite electrode in comparison with other morphologies. We acquired the Peony-like 3D MoS 2 /Au composite for photoelectrochemical sensing of glucose in buffer and diluted plasma solutions with a very low limit of detection of 1.3 nM and superb sensitivity in plasma. Overall, we have successfully synergized both electrical and optical merits from individual components to form a novel composite, which offered an effective scaffold for the development of PEC sensors.

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Sunlight driven photoelectrochemical light-to-electricity conversion of screen-printed surface nanostructured TiO 2 decorated with plasmonic Au nanoparticles

Cited by 19 publications

References 45 publications

Photocurrent Enhancements of TiO₂-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Photocurrent Enhancements of TiO₂-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

Nanopattern-Assisted Direct Growth of Peony-like 3D MoS₂/Au Composite for Nonenzymatic Photoelectrochemical Sensing

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Sunlight driven photoelectrochemical light-to-electricity conversion of screen-printed surface nanostructured TiO 2 decorated with plasmonic Au nanoparticles

Cited by 19 publications

References 45 publications

Photocurrent Enhancements of TiO2-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Photocurrent Enhancements of TiO2-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Photoelectrochemical Water‐Splitting Using CuO‐Based Electrodes for Hydrogen Production: A Review

Nanopattern-Assisted Direct Growth of Peony-like 3D MoS2/Au Composite for Nonenzymatic Photoelectrochemical Sensing

Contact Info

Product

Resources

About

Photocurrent Enhancements of TiO₂-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Photocurrent Enhancements of TiO₂-Based Nanocomposites with Gold Nanostructures/Reduced Graphene Oxide on Nanobranched Substrate

Nanopattern-Assisted Direct Growth of Peony-like 3D MoS₂/Au Composite for Nonenzymatic Photoelectrochemical Sensing