Solvothermal preparation of Ag nanoparticles sensitized TiO2 nanotube arrays with enhanced photoelectrochemical performance

Zhong, Jiasong; Wang, Q.Y.; Yu, Yifu

doi:10.1016/j.jallcom.2014.08.205

Cited by 34 publications

(11 citation statements)

References 16 publications

(14 reference statements)

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“…These include modification with noble metal NPs to form ternary photocatalysts, because when the frequency of the incident photons matches the overall vibrational frequency of the conduction electrons of the noble metal NPs, the NPs can absorb incident photons and generate plasmon-induced photoexcited electrons. 22 If the photoexcited electrons can be made to migrate into the conduction band of ZnO and subsequently participate in the photodegradation process, it increases the visible-light photocatalytic efficiency of the ternary photocatalyst. In particular, Ag-NP-doped ZnO semiconductor nanocomposites exhibit high photocatalytic activity, given by the frequency dependence of the real and imaginary parts of the dielectric function of Ag.…”

Section: Introductionmentioning

confidence: 99%

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

Wang

Juan

et al. 2015

Phys. Chem. Chem. Phys.

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Herein, we reported a simple and "green" method for preparing the ternary photocatalyst Ag-graphene quantum dots (GQDs)-ZnO. In this method, an aqueous solution of GQDs not only acted as a substituent for the organic solvent for preparing the ZnO precursor but was also used as a reducing agent for the in situ synthesis of Ag nanoparticles (NPs). X-ray diffraction analysis and scanning electron microscopy were employed to confirm the effects of the GQD solution as a solvent on the ZnO structure. Transmission electron microscopy confirmed the synthesis of Ag NPs in the GQD solution as well as the formation of close interconnections between them. Furthermore, photocatalytic tests involving the degradation of Rhodamine B showed that the synthesized ternary photocatalyst displayed excellent visible-light photocatalytic activity, which was much higher than that of pure ZnO and binary photocatalysts such as Ag-ZnO and GQDs-ZnO. We believe that this method will lead to the "green" synthesis of hybrid metal/carbon/semiconductor photocatalysts with higher photocatalytic activities.

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Section: Introductionmentioning

confidence: 99%

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

Wang

Juan

et al. 2015

Phys. Chem. Chem. Phys.

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“…A superior photoelectrochemical performance of 2 mA/cm 2 was demonstrated by AgTiNT produced by hydrothermal method. Nevertheless, the synthesis route required high temperature of 180 °C for 12 hours (Zhong et al 2015).…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic deposition of silver particles on titania nanotube thin films: Influence of precursor concentration

Lim

Kanakaraju

Lim

2020

MJCET

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Titania nanotubes (TiNT) has gained much interest as it has high surface area and fewer grain boundaries. In order to enhance the photoelectrochemical properties of TiNT, modification has been carried out to dope silver on TiNT. In this study, a combination of electrochemical anodisation and a photochemical reduction was employed to fabricate silver supported on titania nanotubes (AgTiNT). TiNT was synthesized via anodisation of titanium plate in a two-electrode system containing ethylene glycol and ammonium fluoride. Then, the silver particles were deposited on TiNT by immersion in various concentrations of silver precursor solution followed by ultraviolet light radiation. The prepared samples were characterized using field emission scanning electron microscopy (FESEM) for morphology, x-ray diffractometry (XRD) for crystal structure and energy dispersive x-ray (EDX) to determine the element content. TiNT demonstrated a well-ordered structure, but the nanotubes tend to clump together upon deposition of Ag. The effect of Ag deposition on the photoelectrochemical performance of TiNT was studied where almost one-fold enhancement in the photoelectrochemical property was observed for AgTiNT compared to pure TiNT.

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“…However, TiO 2 presents a large band gap with strong absorption in UV region as well as sluggish kinetic of generating electron‐hole pairs . Therefore, a number of photoactive materials based on TiO 2 combined to other inorganic semiconductors and organic dyes compounds have been proposed. For example, Zhang et al., developed photoelectrochemical sensors employing TiO 2 sensitized with Hemin and CdSe‐DNA .…”

Section: Introductionmentioning

confidence: 93%

Light‐emitting Diode‐assisted Determination of 2‐(1,1‐Dimethylethyl)‐1,4‐Benzenediol in Cosmetic Samples Exploiting TiO₂ Sensitized with Lithium 7,7′,8,8′‐Tetracyanoquinodimethanide

et al. 2018

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This paper reports a novel analytical device for the determination of 2‐(1,1‐dimethylethyl)‐1,4‐benzenediol antioxidant (TBHQ) in cosmetic samples exploiting a photoelectrochemical sensor based on titanium dioxide nanoparticles sensitized with lithium 7,7′,8,8′‐tetracyanoquinodimethanide on indium tin oxide electrode. The proposed photoelectrochemical sensor possesses the capacity of harvesting light energy from a commercial light‐emitting diode (LED) lamp for the determination of TBHQ molecules. The photoelectrochemical sensor presented photocurrent response to antioxidant about 2‐fold higher than pure titanium dioxide. The sensor shows high photocurrent response to TBHQ antioxidant in comparison to photocurrent response to 2,3‐t‐butyl‐4‐hydroxyanisole and 2,6‐Di‐tert‐butyl‐4‐methylphenol, indicating selectivity to TBHQ. Under optimized experimental conditions, the photoelectrochemical sensor presents two linear ranges of response for the analyte, the former from 0.6 to 200 μmol L−1, and the latter from 200 to 5000 μmol L−1. A low limit of detection of 0.17 μmol L−1 was obtained for the proposed photoelectrochemical sensor. The sensor was successfully employed to the analysis of cosmetic samples, with recovery values between 96 % and 98 %.

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Solvothermal preparation of Ag nanoparticles sensitized TiO2 nanotube arrays with enhanced photoelectrochemical performance

Cited by 34 publications

References 16 publications

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

Photocatalytic deposition of silver particles on titania nanotube thin films: Influence of precursor concentration

Light‐emitting Diode‐assisted Determination of 2‐(1,1‐Dimethylethyl)‐1,4‐Benzenediol in Cosmetic Samples Exploiting TiO₂ Sensitized with Lithium 7,7′,8,8′‐Tetracyanoquinodimethanide

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Solvothermal preparation of Ag nanoparticles sensitized TiO2 nanotube arrays with enhanced photoelectrochemical performance

Cited by 34 publications

References 16 publications

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

Improving photocatalytic performance of ZnO via synergistic effects of Ag nanoparticles and graphene quantum dots

Photocatalytic deposition of silver particles on titania nanotube thin films: Influence of precursor concentration

Light‐emitting Diode‐assisted Determination of 2‐(1,1‐Dimethylethyl)‐1,4‐Benzenediol in Cosmetic Samples Exploiting TiO2 Sensitized with Lithium 7,7′,8,8′‐Tetracyanoquinodimethanide

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Light‐emitting Diode‐assisted Determination of 2‐(1,1‐Dimethylethyl)‐1,4‐Benzenediol in Cosmetic Samples Exploiting TiO₂ Sensitized with Lithium 7,7′,8,8′‐Tetracyanoquinodimethanide