Complex Oxide–Noble Metal Conjugated Nanoparticles

Guo, Jing; Chiou, Yao De; Liang, Wen I.; Liu, Heng Jui; Chen, Ying Jiun; Kuo, Wen-Chuan; Tsai, Chih Ya; Tsai, Kai An; Kuo, Ho Hung; Hsieh, Wen‐Pin; Juang, Jenh‐Yih; Hsu, Yung‐Jung; Lin, Hong Ji; Chen, Chien Te; Liao, Xueyang; Shi, Bi; Chu, Ying Hao

doi:10.1002/adma.201204582

Cited by 32 publications

(21 citation statements)

References 37 publications

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“…For example, the self‐assembled BFO‐FO vertical heterostructure with the optimal thickness was investigated in this study. Such a possibility has been demonstrated recently in other complex oxide systems . With a stacking of conjugated nanocrystal, the optical absorption should be optimized to boost up the PEC performance of this material system.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembled BiFeO₃‐ε‐Fe₂O₃ Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

Quynh

Van

Bitla

et al. 2016

Advanced Energy Materials

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Self‐assembled vertical heterostructure with a high interface‐to‐volume ratio offers tremendous opportunities to realize intriguing properties and advanced modulation of functionalities. Here, a heterostructure composed of two visible‐light photocatalysts, BiFeO3 (BFO) and ε‐Fe2O3 (ε‐FO), is designed to investigate its photoelectrochemical performance. The structural characterization of the BFO‐FO heterostructures confirms the phase separation with BFO nanopillars embedded in the ε‐FO matrix. The investigation of band structure of the heterojunction suggests the assistance of photoexcited carrier separation, leading to an enhanced photoelectrochemical performance. The insights into the charge separation are further revealed by means of ultrafast dynamics and electrochemical impedance spectroscopies. This work shows a delicate design of the self‐assembled vertical heteroepitaxy by taking advantage of the intimate contact between two phases that can lead to a tunable charge interaction, providing a new configuration for the optimization of photoelectrochemical cell.

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Section: Resultsmentioning

confidence: 99%

Self‐Assembled BiFeO₃‐ε‐Fe₂O₃ Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

Quynh

Van

Bitla

et al. 2016

Advanced Energy Materials

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“…Semiconductors, such as TiO 2 and ZnO, show high photocatalytic activity under UV light (λ < 400 nm), with very limited use of sunlight (about 4%). To overcome this limitation and prepare systems with efficient Vis light harvesting, several strategies have been developed, including non-metal or metal doping of semiconductors and coupling of semiconductors with other materials [4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

AgCl-ZnAl Layered Double Hydroxides as Catalysts with Enhanced Photodegradation and Antibacterial Activities

et al. 2019

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Surface-modified ZnAl layered double hydroxides (LDHs) were prepared by reaction of AgNO3, with both ZnAlCl (LDH1) and ZnAlCO3 exchanged on the surface with chloride anions (LDH3). In this way, AgCl nanoparticles with crystalline domains ranging from 40 to 100 nm were grown on the LDH surface. An additional sample was prepared by partial reduction of silver to obtain Ag@AgCl-LDH (LDH2). The composites were tested as catalysts in Rhodamine B (RhB) degradation, wherein LDH2 showed complete cleavage of RhB after 45 min of irradiation versus 70 min needed in the presence of AgCl. This time decreased to 35 min for LDH1 and 15 min for LDH3, underlining the role of the AgCl dimensions and anion in the interlayer region. Studies on the reactive species involved in the degradation process revealed that, for all catalysts, O2·− was the main active species, while, to some extent, holes contribute to the activity of the LDH3. Finally, the composites showed high bactericidal activity, under irradiation, against Escherichia coli, comparable with that of Gentamicin, the positive control. A synergic effect of silver released from the composites and the production of reactive oxygen species was considered.

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“…[158] The LAL of at ernary oxide target with gold colloidsa sa dditives allows the generation of ternary oxide supported catalysts (e.g.,A u ÀCoFe 2 O 4 and AuÀ SrTiO 3 ). [159] The AuÀSrTiO 3 NPs show higher photodegradation of rhodamine B( RhB) and MO than that of P25T iO 2 .H owever, one challenge regarding uniformity of the particles remains. This is probably related to the bubble phase of LAL.…”

Section: Ternary Oxide Catalystsmentioning

confidence: 99%

“…The as‐prepared Au/FeOCl composites are good electrode materials to develop highly sensitive HCl gas sensors . The LAL of a ternary oxide target with gold colloids as additives allows the generation of ternary oxide supported catalysts (e.g., Au−CoFe 2 O 4 and Au−SrTiO 3 ) . The Au−SrTiO 3 NPs show higher photodegradation of rhodamine B (RhB) and MO than that of P25 TiO 2 .…”

Section: State Of the Art Of Doped Oxide Ternary Oxide And Carbide mentioning

confidence: 99%

Recent Advances in Surfactant‐Free, Surface‐Charged, and Defect‐Rich Catalysts Developed by Laser Ablation and Processing in Liquids

Zhang

et al. 2017

ChemNanoMat

110

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For excellence in the synthesis of highly active metal and oxide catalysts, a newly emerging technique—laser synthesis and processing of colloids (LSPC)—is gaining increasing attention for catalytic applications, such as water splitting, fuel cells, and photodegradation of organic pollutants. The advantages of using LSPC‐synthesized metal catalysts have been reviewed elsewhere [Chem. Rev. 2017, 117, 3990–4103]. Herein, current challenges related to the properties (surface chemistry and particle evolution) of metal catalysts synthesized by laser ablation in liquids/laser processing in liquids are discussed. The main focus is on the advantages of LSPC in surfactant‐free defect engineering of oxide nanoparticles. Compared with other techniques (e.g., hydrogenation), LSPC provides a unique platform to simultaneously introduce oxygen vacancies and surface disorders into oxide (e.g., TiO2) nanomaterials; thus allowing narrowing of the band gap from both conduction and valence bands. Defect‐rich oxides have versatile uses, such as being directly applied as photocatalysts and as building blocks to construct supported, doped, and ternary oxide photocatalysts for electrochemical and photocatalytic applications. The LSPC‐synthesized catalysts are promising for applications as commercial catalysts in light of their higher activities than those of current Pt/C and P25 TiO2 commercial catalysts.

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Complex Oxide–Noble Metal Conjugated Nanoparticles

Cited by 32 publications

References 37 publications

Self‐Assembled BiFeO₃‐ε‐Fe₂O₃ Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

Self‐Assembled BiFeO₃‐ε‐Fe₂O₃ Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

AgCl-ZnAl Layered Double Hydroxides as Catalysts with Enhanced Photodegradation and Antibacterial Activities

Recent Advances in Surfactant‐Free, Surface‐Charged, and Defect‐Rich Catalysts Developed by Laser Ablation and Processing in Liquids

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Complex Oxide–Noble Metal Conjugated Nanoparticles

Cited by 32 publications

References 37 publications

Self‐Assembled BiFeO3‐ε‐Fe2O3 Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

Self‐Assembled BiFeO3‐ε‐Fe2O3 Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

AgCl-ZnAl Layered Double Hydroxides as Catalysts with Enhanced Photodegradation and Antibacterial Activities

Recent Advances in Surfactant‐Free, Surface‐Charged, and Defect‐Rich Catalysts Developed by Laser Ablation and Processing in Liquids

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Product

Resources

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Self‐Assembled BiFeO₃‐ε‐Fe₂O₃ Vertical Heteroepitaxy for Visible Light Photoelectrochemistry

Self‐Assembled BiFeO₃‐ε‐Fe₂O₃ Vertical Heteroepitaxy for Visible Light Photoelectrochemistry