Site-selective doping mechanisms for the enhanced photocatalytic activity of tin oxide nanoparticles

Jang, Woo‐Sung; Jin, Yeongrok; Kim, Young-Hoon; Yang, Sang‐Hyeok; Kim, Seon Je; Hong, Jung A.; Baik, Jaeyoon; Lee, Jaekwang; Lee, Hangil; Kim, Young‐Min

doi:10.1016/j.apcatb.2022.121083

Cited by 9 publications

(2 citation statements)

References 45 publications

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“…EELS SI data sets for the HLO samples were obtained under conditions of an accelerating voltage of 300 kV and an energy dispersion of 0.25 eV/ch for the energy loss ranges of 180–692 and 420–932 eV with a 5 mm entrance aperture. To obtain A / B ratio maps of the HLO films, a multiple linear/nonlinear least-squares (M/NLLS) curve fitting approach , was applied to the A and B peaks in the O K ELNES, which was implemented in the data processing software Gatan DigitalMicrograph.…”

Section: Methodsmentioning

confidence: 99%

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO₂ Ferroelectrics for Negative Capacitance Field Effect Transistors

Pujar,

Cho,

Kim

et al. 2023

ACS Nano

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The crucial role of nanocrystalline morphology in stabilizing the ferroelectric orthorhombic (o)-phase in dopedhafnia films is achieved via chemical solution deposition (CSD) by intentionally retaining carbonaceous impurities to inhibit grain growth. However, in the present study, large-grained (>100 nm) La-doped HfO 2 (HLO) films are grown directly on silicon by adopting engineered water-diluted precursors with a minimum carbonaceous load and excellent shelf life. The ophase stabilization is accomplished through a well-distributed La dopant, which generates uniformly populated oxygen vacancies, eliminating the need for oxygen-scavenging electrodes. These oxygen-deficient HLOs show a maximum remnant polarization of 37.6 μC/cm 2 (2P r ) without wake-up and withstand large fields (>6.2 MV/cm). Furthermore, CSD-HLO in series with Al 2 O 3 improves switching of MOSFETs (with an amorphous oxide channel) based on the negative capacitance effect. Thus, uniformly distributed oxygen vacancies serve as a standalone factor in stabilizing the o-phase, enabling efficient wake-up-free ferroelectricity without the need for nanostructuring, capping stresses, or oxygen-reactive electrodes.

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Section: Methodsmentioning

confidence: 99%

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO₂ Ferroelectrics for Negative Capacitance Field Effect Transistors

Pujar,

Cho,

Kim

et al. 2023

ACS Nano

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“…27 Doping engineering as a facile strategy has been proposed to ameliorate the electronic structure of TMDCs and bring extensive defects, 28–30 and has been very attractive in the traditional electrocatalyst field. 31–34 Despite the critical importance of specific atom doping in the functionalization of 2D TMDCs, a systematic theoretical study on the influence mechanism of different dopants on the catalyst has not been reported yet. Hence, it is urgent and necessary to develop a set of guidelines for a rational understanding of the adsorption and catalytic mechanism for polysulfide/Li 2 S redox on different atom-doped 2D TMDCs.…”

Section: Introductionmentioning

confidence: 99%

Atomic-level design rules of metal-cation-doped catalysts: manipulating electron affinity/ionic radius of doped cations for accelerating sulfur redox kinetics in Li–S batteries

Wang,

Shan

et al. 2023

Energy Environ. Sci.

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Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

Mane,

Dake,

Raskar

et al. 2024

Physica Status Solidi (a)

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Herein, the successful synthesis of ZnO/Fe‐doped Bi2O3 nanocomposite through a microwave‐assisted coprecipitation method is reported. The fabricated materials are comprehensively characterized using X‐ray diffraction, field‐emission scanning electron microscopy, energy dispersive X‐ray analysis, UV–vis, vibrating sample magnetometer, and photoluminescence techniques. The results of the investigation unveil a reduction in crystalline size, a low bandgap of 1.7 eV, and notable improvements in magnetization and surface area (50.63 m2 g−1) upon the incorporation of ZnO and Fe doping into Bi2O3. Remarkably, the ZnO/5% Fe‐doped Bi2O3 composite demonstrates 86.34% degradation of methylene blue (MB) dye within 60 min. Furthermore, this composite exhibits significant antifungal activity, as evidenced by a zone of inhibition diameter of 20 mm against Aspergillus flavus. Ongoing studies are investigating the impact of pH, inorganic ions, scavenger mechanisms, and MB degradation. These findings underscore the synergistic effects of ZnO and Fe, which enhance the absorption of photons that decrease the recombination rate and increase the charge transfer of Bi2O3, contributing to the improved material properties of the ZnO/5% Fe‐doped Bi2O3 composite. This study paves the way for further exploration of the multifunctional properties of ZnO/Fe‐doped Bi2O3 nanocomposites in diverse environmental and biomedical applications.

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Site-selective doping mechanisms for the enhanced photocatalytic activity of tin oxide nanoparticles

Cited by 9 publications

References 45 publications

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO₂ Ferroelectrics for Negative Capacitance Field Effect Transistors

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO₂ Ferroelectrics for Negative Capacitance Field Effect Transistors

Atomic-level design rules of metal-cation-doped catalysts: manipulating electron affinity/ionic radius of doped cations for accelerating sulfur redox kinetics in Li–S batteries

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites

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Site-selective doping mechanisms for the enhanced photocatalytic activity of tin oxide nanoparticles

Cited by 9 publications

References 45 publications

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO2 Ferroelectrics for Negative Capacitance Field Effect Transistors

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO2 Ferroelectrics for Negative Capacitance Field Effect Transistors

Atomic-level design rules of metal-cation-doped catalysts: manipulating electron affinity/ionic radius of doped cations for accelerating sulfur redox kinetics in Li–S batteries

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi2O3 Nanocomposites

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An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO₂ Ferroelectrics for Negative Capacitance Field Effect Transistors

An Aqueous Route to Oxygen-Deficient Wake-Up-Free La-Doped HfO₂ Ferroelectrics for Negative Capacitance Field Effect Transistors

Synergistic Enhancement of Photocatalytic and Antifungal Activities in Microwave‐Assisted ZnO/Fe‐Doped Bi₂O₃ Nanocomposites