Boosting photocatalytic activity of WO3 nanorods with tailored surface oxygen vacancies for selective alcohol oxidations

Wang, Jinguo; Chen, Zimei; Zhai, Guangjun; Men, Yongfeng

doi:10.1016/j.apsusc.2018.08.181

Cited by 79 publications

(14 citation statements)

References 56 publications

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“…Figure d displays the UV‐vis‐NIR absorption spectra of Ag/WO 3− x heterostructures WO 3− x nanosheets and Ag nanoparticles. It can be clearly seen that WO 3− x nanosheets exhibit strong UV absorption below 400 nm, belonging to its intrinsic absorption . For Ag/WO 3− x , a strong and broad peak is observed at visible light region, which is derived from the localized surface plasmon resonance (LSPR) effect of the Ag nanoparticles .…”

Section: Resultsmentioning

confidence: 99%

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO_3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Ren

Chen

2019

Chemistry An Asian Journal

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Exploring advanced electrocatalysts for electrocatalytic hydrogen evolution is highly desired but remains a challenge due to the lack of an efficient preparation method and reasonable structural design. Herein, we deliberately designed novel Ag/WO3−x heterostructures through a supercritical CO2‐assisted exfoliation‐oxidation route and the subsequent loading of Ag nanoparticles. The ultrathin and oxygen vacancies‐enriched WO3−x nanosheets are ideal substrates for loading Ag nanoparticles, which can largely increase the active site density and improve electron transport. Besides, the resultant WO3−x nanosheets with porous structure can form during the electrochemical cycling process induced by an electric field. As a result, the exquisite Ag/WO3−x heterostructures show an enhanced hydrogen evolution reaction (HER) activity with a low onset overpotential of ≈30 mV, a small Tafel slope of ≈40 mV dec−1 at 10 mA cm−2, and as well as long‐term durability. This work sheds light on material design and preparation, and even opens up an avenue for the development of high‐efficiency electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO_3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Ren

Chen

2019

Chemistry An Asian Journal

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“…Compared with the mono-component photocatalysts reported in other papers (Adhikari et al, 2018;Khan et al, 2018;Wang et al, 2018) the ZnO-TiO 2 and SnO 2 -TiO 2 tandem structures present the advantages of reduced charge carrier recombination, higher charge carrier mobility, and improved charge carrier concentration, based on the simultaneous photo-conversion contribution of both semiconductors. The photocatalytic activity depends on the ability of the tandem structure to generate the oxidative species required to induce pollutant molecule mineralization, according to the following Equations (3)-(5):…”

Section: Photocatalytic Propertiesmentioning

confidence: 92%

Enhancing the Photocatalytic Activity of SnO2-TiO2 and ZnO-TiO2 Tandem Structures Toward Indoor Air Decontamination

Eneşca

2020

Front. Chem.

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ZnO-TiO2 and SnO2-TiO2 tandem structures were developed using the doctor blade technique. It was found that by employing organic hydrophilic and hydrophobic as additives into the precursor it is possible to tailor the film density and morphology with direct consequences on the photocatalytic activity of the tandem structures. The highest photocatalytic efficiency corresponds to ZnO-TiO2 and can reach 74.04% photocatalytic efficiency toward acetaldehyde when a hydrophilic additive is used and 70.93% when a hydrophobic additive is employed. The snO2-TiO2 tandem structure presents lower photocatalytic properties (61.35 % when the hydrophilic additive is used) with a constant rate reaction of 0.07771 min−1.

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“…The analysis of scattered light can provide information about a sample's molecular structure. In 1974, Fleischmann et al reported an unusual Raman signal from pyridine on the surface of a roughened silver electrode, resulting in subsequent theoretical studies . For instance, R. P Van Duyne and J.…”

Section: Introductionmentioning

confidence: 99%

“…In 1974, Fleischmann et al reported an unusual Raman signal from pyridine on the surface of a roughened silver electrode, [2] resulting in subsequent theoretical studies. [3][4][5][6][7][8] For instance, R. P Van Duyne and J. A. Creighton et al found that the Raman signal from the pyridine molecules on the silver electrode was about 10 6 times stronger than in solution and named the effect as surface-enhanced Raman scattering (SERS).…”

Section: Introductionmentioning

confidence: 99%

Conversion of PATP to DMAB based on Ag⁺‐induced catalytic oxidation

Long

Liu

et al. 2020

J Raman Spectroscopy

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In this paper, the Ag + is first adopted to oxidize PATP to DMAB, and the intermediate elementary Ag of the reaction is used to enhance the Raman signal, which acts as a surface-enhanced Raman scattering substrate and overcomes the drawbacks of the traditional metal sol. The experimental repetition rate reached 100%; the Raman peak of the product dimercaptoazobenzene was clear and obvious. Compared with the traditional silver sol system, the intensity of the Raman peak is increased by 10 times. It is believed that the results will make a great contribution to the future research of the surface plasmonassisted coupling reaction. K E Y W O R D S coupling reaction, SERS, silver ions induced catalytic oxidation, surface plasmon, surface sweep test

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Boosting photocatalytic activity of WO3 nanorods with tailored surface oxygen vacancies for selective alcohol oxidations

Cited by 79 publications

References 56 publications

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO_3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO_3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Enhancing the Photocatalytic Activity of SnO2-TiO2 and ZnO-TiO2 Tandem Structures Toward Indoor Air Decontamination

Conversion of PATP to DMAB based on Ag⁺‐induced catalytic oxidation

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Boosting photocatalytic activity of WO3 nanorods with tailored surface oxygen vacancies for selective alcohol oxidations

Cited by 79 publications

References 56 publications

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Enhancing the Photocatalytic Activity of SnO2-TiO2 and ZnO-TiO2 Tandem Structures Toward Indoor Air Decontamination

Conversion of PATP to DMAB based on Ag+‐induced catalytic oxidation

Contact Info

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Resources

About

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO_3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Ultrathin, Porous and Oxygen Vacancies‐Enriched Ag/WO_3−x Heterostructures for Electrocatalytic Hydrogen Evolution

Conversion of PATP to DMAB based on Ag⁺‐induced catalytic oxidation