A review of noble metal (Pd, Ag, Pt, Au)–zinc oxide nanocomposites: synthesis, structures and applications

Hang, Liu; Feng, Jiatai; Wang, Jie

doi:10.1007/s10854-017-7612-0

Cited by 38 publications

(22 citation statements)

References 75 publications

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“…(a) (b) Noble metals, such as Ag, Au, and Pd [60][61][62][63], and transition metals (e.g., Fe, Mn, Ni and Cu) [64][65][66] can be used to dope ZnO for improving its visible-light photocatalytic activity and reducing charge carrier recombination. In the case of noble metals, the formation of a Schottky junction at the metal-ZnO interface promotes electron-hole pair separation, thereby reducing charge recombination, and enhancing spectral response in the visible region ( Figure 6a) [61,67].…”

Section: Photocatalytic Ros Productionmentioning

confidence: 99%

Interactions of Zinc Oxide Nanostructures with Mammalian Cells: Cytotoxicity and Photocatalytic Toxicity

Liao

Jin

et al. 2020

IJMS

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This article presents a state-of-the-art review and analysis of literature studies on the morphological structure, fabrication, cytotoxicity, and photocatalytic toxicity of zinc oxide nanostructures (nZnO) of mammalian cells. nZnO with different morphologies, e.g., quantum dots, nanoparticles, nanorods, and nanotetrapods are toxic to a wide variety of mammalian cell lines due to in vitro cell–material interactions. Several mechanisms responsible for in vitro cytotoxicity have been proposed. These include the penetration of nZnO into the cytoplasm, generating reactive oxygen species (ROS) that degrade mitochondrial function, induce endoplasmic reticulum stress, and damage deoxyribonucleic acid (DNA), lipid, and protein molecules. Otherwise, nZnO dissolve extracellularly into zinc ions and the subsequent diffusion of ions into the cytoplasm can create ROS. Furthermore, internalization of nZnO and localization in acidic lysosomes result in their dissolution into zinc ions, producing ROS too in cytoplasm. These ROS-mediated responses induce caspase-dependent apoptosis via the activation of B-cell lymphoma 2 (Bcl2), Bcl2-associated X protein (Bax), CCAAT/enhancer-binding protein homologous protein (chop), and phosphoprotein p53 gene expressions. In vivo studies on a mouse model reveal the adverse impacts of nZnO on internal organs through different administration routes. The administration of ZnO nanoparticles into mice via intraperitoneal instillation and intravenous injection facilitates their accumulation in target organs, such as the liver, spleen, and lung. ZnO is a semiconductor with a large bandgap showing photocatalytic behavior under ultraviolet (UV) light irradiation. As such, photogenerated electron–hole pairs react with adsorbed oxygen and water molecules to produce ROS. So, the ROS-mediated selective killing for human tumor cells is beneficial for cancer treatment in photodynamic therapy. The photoinduced effects of noble metal doped nZnO for creating ROS under UV and visible light for killing cancer cells are also addressed.

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Section: Photocatalytic Ros Productionmentioning

confidence: 99%

Interactions of Zinc Oxide Nanostructures with Mammalian Cells: Cytotoxicity and Photocatalytic Toxicity

Liao

Jin

et al. 2020

IJMS

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“…Noble metal nanomaterials are an important part of nanostructured materials, which have shown a wide application space in the fields of new energy, photoelectric information storage and functional catalysis [8][9][10]. This kind of materials combined the special physical and chemical properties of noble metals with nanomaterials to exhibit superior performance, expanding the application range of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Noble Metal Nanostructured Materials for Chemical and Biosensing Systems

et al. 2020

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Nanomaterials with unique physical and chemical properties have attracted extensive attention of scientific research and will play an increasingly important role in the future development of science and technology. With the gradual deepening of research, noble metal nanomaterials have been applied in the fields of new energy materials, photoelectric information storage, and nano-enhanced catalysis due to their unique optical, electrical and catalytic properties. Nanostructured materials formed by noble metal elements (Au, Ag, etc.) exhibit remarkable photoelectric properties, good stability and low biotoxicity, which received extensive attention in chemical and biological sensing field and achieved significant research progress. In this paper, the research on the synthesis, modification and sensing application of the existing noble metal nanomaterials is reviewed in detail, which provides a theoretical guidance for further research on the functional properties of such nanostructured materials and their applications of other nanofields.

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“…In recent times, the synthesis methods and the multi‐catalytic properties of noble metal–ZnO nanocomposites have been reviewed. The catalytic activity of these nanocomposites was found to depend not only on the particular noble metal but also on the architecture of the catalyst material …”

Section: Introductionmentioning

confidence: 99%

One Pot Synthesis of Au_ZnO Core‐Shell Nanoparticles Using a Zn Complex Acting as ZnO Precursor, Capping and Reducing Agent During the Formation of Au NPs

et al. 2018

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Semiconducting ZnO nanostructures show a wide band gap, a large free exciton binding energy, high electron mobility and are excellent for ultraviolet detection. Noble metals absorb visible light and produce localized surface plasmon resonance useful to enhance visible photodetection. Therefore, the coupling of gold nanoparticles and the wide-band-gap ZnO semiconductor represents the moist suited way to enhance photodetection. The Au_ZnO system has already been obtained by multiple-step syntheses that involve the selective prepara- [a]

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A review of noble metal (Pd, Ag, Pt, Au)–zinc oxide nanocomposites: synthesis, structures and applications

Cited by 38 publications

References 75 publications

Interactions of Zinc Oxide Nanostructures with Mammalian Cells: Cytotoxicity and Photocatalytic Toxicity

Interactions of Zinc Oxide Nanostructures with Mammalian Cells: Cytotoxicity and Photocatalytic Toxicity

Noble Metal Nanostructured Materials for Chemical and Biosensing Systems

One Pot Synthesis of Au_ZnO Core‐Shell Nanoparticles Using a Zn Complex Acting as ZnO Precursor, Capping and Reducing Agent During the Formation of Au NPs

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