A novel bi-functional SiO2@TiO2/CDs nanocomposite with yolk-shell structure as both efficient SERS substrate and photocatalyst

Gao, Xinna; Wang, Xueyan; Yang, Zheng; Shen, Yuhua; Xie, Anjian

doi:10.1016/j.apsusc.2018.12.250

Cited by 16 publications

(1 citation statement)

References 34 publications

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“…Based on the above discussion, it is important to investigate the influence of vacancy defects on the improvement of SERS and photocatalytic activity, which would help to gain in-depth understanding of the correlation between microstructure and property. Moreover, the development of dual functional semiconductors, which can not only act as SERS-active substrates but only efficient photocatalysts, makes it feasible to monitor catalytic reaction on the surface of catalyst [ 16 , 28 , 29 ]. It is known that UV-visible absorption and chromatographic measurements are popular techniques to analyze photocatalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Sulfur Vacancy-Rich CuS for Improved Surface-Enhanced Raman Spectroscopy and Full-Spectrum Photocatalysis

Gong

Niu

et al. 2022

Nanomaterials

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There are growing interests in the development of bifunctional semiconducting nanostructures for photocatalysis and real-time monitoring of degradation process on catalysts. Defect engineering is a low-cost approach to manipulating the properties of semiconductors. Herein, we prepared CuS nanoplates by a hydrothermal method at increasing amounts of thioacetamide (CS-1, CS-2, and CS-3) and investigated the influence of sulfur vacancy (Vs) on surface-enhanced Raman spectroscopy (SERS) and photocatalysis performance. SERS intensity of 4-nitrobenzenethiol on CS-3 is 346 and 17 times that of CS-1 and CS-2, respectively, and enhancement factor is 1.34×104. Moreover, SERS is successfully applied to monitor the photodegradation of methyl orange. In addition, CS-3 also exhibited higher efficiency of Cr(VI) photoreduction than CS-1 and CS-2, and removal rate is 88%, 96%, and 73% under 2 h UV, 4 h visible, and 4 h near-infrared illumination, respectively. A systematic study including electron paramagnetic resonance spectra, photoelectrochemical measurements, and nitrogen adsorption isotherms were conducted to investigate the underlying mechanism. This work may help to understand the impact of vacancy defect on SERS and photocatalysis, and provide an effective and low-cost approach for the design of multifunctional materials.

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Section: Introductionmentioning

confidence: 99%

Sulfur Vacancy-Rich CuS for Improved Surface-Enhanced Raman Spectroscopy and Full-Spectrum Photocatalysis

Gong

Niu

et al. 2022

Nanomaterials

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S‐Scheme Heterojunction TiO₂/CdS Nanocomposite Nanofiber as H₂‐Production Photocatalyst

et al. 2019

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One-dimensional (1D) nanostructured photocatalyst is a promising candidate for hydrogen (H 2 ) generation, which can be used to deal with the energy crisis. Herein, novel 1D TiO 2 /CdS wellhybridized nanofibers (NFs) were synthesized via in situ electrospinning method. These 1D hybrid NFs showed a high H 2production rate of 2.32 mmol h À 1 g À 1 with an apparent quantum efficiency of 10.14 %, which was 35-fold higher than that of pristine TiO 2 NFs. X-ray photoelectron spectroscopy (XPS) analysis and density functional theory calculation implied that the electrons transferred from CdS to TiO 2 upon hybridization and created an internal electric field (IEF) pointing from CdS to TiO 2 . This IEF drove the photoexcited electrons in TiO 2 to transfer toward CdS upon light irradiation as revealed by in situ irradiated XPS analysis, suggesting that a step-scheme (Sscheme) heterojunction was formed in the TiO 2 /CdS nanohybrids and greatly promoted the separation of electron-hole pairs to foster efficient H 2 photogeneration. The significant enhancement of photocatalytic activity was also benefited from the easy transfer for electrons in the 1D well-distributed nanostructure of nanohybrids. This

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Effect of SiO2–ZrO2 introduction on visible-light degradation of RhB over anatase TiO2

Liu

Zhang

et al. 2020

J Mater Sci: Mater Electron

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A novel bi-functional SiO2@TiO2/CDs nanocomposite with yolk-shell structure as both efficient SERS substrate and photocatalyst

Cited by 16 publications

References 34 publications

Sulfur Vacancy-Rich CuS for Improved Surface-Enhanced Raman Spectroscopy and Full-Spectrum Photocatalysis

Sulfur Vacancy-Rich CuS for Improved Surface-Enhanced Raman Spectroscopy and Full-Spectrum Photocatalysis

S‐Scheme Heterojunction TiO₂/CdS Nanocomposite Nanofiber as H₂‐Production Photocatalyst

Effect of SiO2–ZrO2 introduction on visible-light degradation of RhB over anatase TiO2

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A novel bi-functional SiO2@TiO2/CDs nanocomposite with yolk-shell structure as both efficient SERS substrate and photocatalyst

Cited by 16 publications

References 34 publications

Sulfur Vacancy-Rich CuS for Improved Surface-Enhanced Raman Spectroscopy and Full-Spectrum Photocatalysis

Sulfur Vacancy-Rich CuS for Improved Surface-Enhanced Raman Spectroscopy and Full-Spectrum Photocatalysis

S‐Scheme Heterojunction TiO2/CdS Nanocomposite Nanofiber as H2‐Production Photocatalyst

Effect of SiO2–ZrO2 introduction on visible-light degradation of RhB over anatase TiO2

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S‐Scheme Heterojunction TiO₂/CdS Nanocomposite Nanofiber as H₂‐Production Photocatalyst