Strong red emission and catalytic properties of ZnO by adding Eu2O3 shell

Gao, Ming; Yan, Cheng; Li, B.Z.; Zhou, Lige; Yao, Jiacheng; Zhang, Y.J.; Liu, H.L.; Cao, Li; Cao, Yang; Yang, Jing; Wang, Y.X.

doi:10.1016/j.jallcom.2017.07.060

Cited by 19 publications

(7 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the PL generation mechanism, photoexcited electrons transition to a high energy level. Because of high-energy-level instability, these electrons usually transition to a low energy level and emit photons 9 , 10 . This inspires us to use electrons as a link to explore the relationship between PL and SERS in the CT mechanism and investigate how PL affects the SERS signal.…”

Section: Introductionmentioning

confidence: 99%

“…However, exploring the relationship between SERS and PL of pure semiconductors is not obvious and thus is not convenient to analyze. Previously, we introduced impurity ions to optimize the matrix semiconductor 10 , 13 . The intra-4 f emission spectra of Nd 3+ are characterized by narrow lines with high color purity because the 4 f electrons of rare-earth ions are shielded from external forces by the outer 5 s and 5 p electrons 14 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology

et al. 2020

Self Cite

View full text Add to dashboard Cite

Surface-enhanced Raman scattering (SERS) and photoluminescence (PL) are important photoexcitation spectroscopy techniques; however, understanding how to analyze and modulate the relationship between SERS and PL is rather important for enhancing SERS, having a great effect on practical applications. In this work, a charge-transfer (CT) mechanism is proposed to investigate the change and relationships between SERS and PL. Analyzing the change in PL and SERS before and after the adsorption of the probe molecules on Nd-doped ZnO indicates that the unique optical characteristics of Nd 3+ ions increase the SERS signal. On the other hand, the observed SERS can be used to explain the cause of PL background reduction. This study demonstrates that modulating the interaction between the probe molecules and the substrate can not only enhance Raman scattering but also reduce the SERS background. Our work also provides a guideline for the investigation of CT as well as a new method for exploring fluorescence quenching.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…One corresponds to the lattice fringe of the Ag (111) plane, d = 0.235 nm. The other one is close to the (002) plane of ZnO, d = 0.257 nm 17 . The results show that a heterostructure of zinc oxide and Ag is formed on the surface of the microspheres.…”

Section: Resultsmentioning

confidence: 91%

Plasmon-coupled Charge Transfer in FSZA Core-shell Microspheres with High SERS Activity and Pesticide Detection

Han

Yao

Quan

et al. 2019

Sci Rep

View full text Add to dashboard Cite

A commercial SERS substrate does not only require strong enhancement, but also can be reused and recycled in actual application. Herein, Fe3O4/SiO2/ZnO/Ag (FSZA) have been synthesised, which consisted of Fe3O4 core with strong magnetic field response and an intermediate SiO2 layer as an electronic barrier to keep the stability of magnetite particles and outer ZnO and Ag as the effective layers for detecting pollutants. The SERS enhancement factor (EF) of the FSZA was ~8.2 × 105. The enhancement mechanism of the FSZA core-shell microspheres were anatomized. The electromagnetic enhancement of surface deposited Ag, charge transfer, and molecular and exciton resonances act together to cause such high enhancement factors. For practical application, the FSZA core-shell microspheres were also used to detect thiram, moreover, which was collected and separated by an external magnetic field, and maintained the SERS activity without significant decline during multiple tests. So the good enhancement performance and magnetic recyclability make the FSZA core-shell microspheres a promising candidates for practical SERS detection applications.

show abstract

“…8,9 Moreover, ZnO has other distinctive properties such as biocompatibility, self-cleaning, and photocatalysis, providing multifunctional potential. 10,11 However, the wide band gap and the rapid recombination of photoexcited electron−hole pairs of ZnO hinder the practical application of photoelectric conversion. There are several ways to improve the photoelectric conversion efficiency of ZnO, such as doping, surface modification, crystal growth control, and heterostructure formation.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it is crucial to develop high sensitivity and lower cost SERS semiconductor substrates. ZnO has been widely studied because of its enrichment, economical fabrication techniques, high photosensitivity, nontoxicity, and photochemical stability. , Moreover, ZnO has other distinctive properties such as biocompatibility, self-cleaning, and photocatalysis, providing multifunctional potential. , However, the wide band gap and the rapid recombination of photoexcited electron–hole pairs of ZnO hinder the practical application of photoelectric conversion. There are several ways to improve the photoelectric conversion efficiency of ZnO, such as doping, surface modification, crystal growth control, and heterostructure formation.…”

Section: Introductionmentioning

confidence: 99%

Improved Charge Transfer and Hot Spots by Doping and Modulating the Semiconductor Structure: A High Sensitivity and Renewability Surface-Enhanced Raman Spectroscopy Substrate

et al. 2019

Self Cite

View full text Add to dashboard Cite

Here, we develop a new method to improve the surface-enhanced Raman spectroscopy (SERS) activity of ZnO using Mg doping combined with noble metals. Highly aligned silver nanoparticles (AgNPs) decorated on an array of Mg-doped ZnO (MZO@Ag) were fabricated. Using rhodamine 6G as the probe molecule, SERS indicated that the MZO@Ag substrate possesses perfect sensitivity, homogeneity, and chemical stability. The enhancement mechanism of this substrate was analyzed in detail, and finite-difference time-domain (FDTD) simulations were used to examine “hot spot” distribution which generated gaps between the balls, the rods, and the stems. FDTD simulation calculated (E/E 0)4 to be 2.5 × 106. Furthermore, the prepared substrates could degrade the target molecules in situ irradiated by visible light irradiation over the course of 40 min and then efficiently recover detectability through a recycling process. Our substrates were easy to fabricate, self-cleaning, and reusable. They are expected to provide new opportunities for the use of SERS in biological sensors, biomedical diagnostics, and food safety.

show abstract

Strong red emission and catalytic properties of ZnO by adding Eu2O3 shell

Cited by 19 publications

References 41 publications

Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology

Monitoring the charge-transfer process in a Nd-doped semiconductor based on photoluminescence and SERS technology

Plasmon-coupled Charge Transfer in FSZA Core-shell Microspheres with High SERS Activity and Pesticide Detection

Improved Charge Transfer and Hot Spots by Doping and Modulating the Semiconductor Structure: A High Sensitivity and Renewability Surface-Enhanced Raman Spectroscopy Substrate

Contact Info

Product

Resources

About