Facile hydrothermal synthesis and optical properties of flower-like CeO2 composed of numerous porous nanorods

Zong, Bangfeng

doi:10.1007/s10854-016-5818-1

Cited by 4 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A significant part of the surface catalytic reaction and/or chemoselectivity of CeO 2 NMs is determined by their morphology, which presents different spatial dimensions, morphologies, OV concentrations, crystallinities, and specific surface areas . At present, the common synthesis of CeO 2 NMs mainly includes traditional synthesis methods (e.g., hydrothermal methods, ,− precipitation, ,,, thermal decomposition, spray pyrolysis, sol–gel methods, , and green synthesis , ). Green synthesis is a synthesis method mediated by plant extracts (e.g., Jatropha curcas extract and Rhus punjabensis).…”

Section: Synthesis Of Ceo2 Nmsmentioning

confidence: 99%

Nanoceria-Based Artificial Nanozymes: Review of Materials and Applications

Xiao

Zhao

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Nanozymes are nanomaterial-based enzyme mimics that have dominated recent research because of their remarkable catalytic activity, stability, and low cost. Among them, CeO2 nanomaterials (CeO2 NMs) possess distinct physicochemical properties and inherent catalytic properties mimicking oxidase (OXD), peroxidase (POD), catalase (CAT), superoxide dismutase (SOD), phosphatase, nuclease, and photolyases. The surface valence state, Ce4+/Ce3+ conversion, and oxygen vacancies (OVs) on the surface of CeO2 NMs are closely associated with enzyme-like activities. Surface modification (ions, small molecules, and macromolecular capping) can strongly promote or inhibit their catalytic activities. CeO2 NMs have emerged as attractive materials for biochemical applications including biocatalytic conversion, pollutant destruction, antimicrobial therapies, biosensors, and disease therapies. We summarize here the development history, catalytic mechanisms, and surface modification methods of CeO2 mimetic enzymes and the exploration of their applications as alternatives to natural enzymes in biochemical fields. Further, we outline potential challenges and prospects and hope to provide better guidance for the design and application of these promising artificial enzymes.

show abstract

Section: Synthesis Of Ceo2 Nmsmentioning

confidence: 99%

Nanoceria-Based Artificial Nanozymes: Review of Materials and Applications

Xiao

Zhao

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…Aside from typical nanoparticles, many other morphologies of CeO 2 have also been reported. − For example, CeO 2 nanorods were synthesized by the hydrolysis of cerium ions in base, followed by heating or ultrasonication. ,− CeO 2 nanoflowers were also synthesized by hydrothermal methods, − as well as by annealing after a prolonged mechanical stirring . Overall, higher temperatures favored the growth of anisotropic CeO 2 morphologies.…”

Section: Introductionmentioning

confidence: 99%

CeO₂ Nanoparticle Transformation to Nanorods and Nanoflowers in Acids with Boosted Oxidative Catalytic Activity

Zhao

Wang

et al. 2021

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Nanoceria (CeO2 nanoparticle) with oxidase-like catalytic activity has been used for a diverse range of analytical, environmental, and nanomedicine applications. In this work, the use of nanoceria for the oxidation of common chromogenic substrates was investigated at low pH, where its activity was greatly enhanced. In addition, the shape of the nanoparticles changed dramatically, yielding nanorods in the presence of adsorbed substrates at pH 1. This work provides an interesting method to synthesize CeO2 nanorods at room temperature. By slightly increasing the reaction temperature, CeO2 nanoflowers were further obtained. This change of shape also affected its catalytic activity, with the nanorods being the most active. The physical and chemical properties of the nanoceria materials were characterized by various spectroscopic, microscopic, and electrochemical techniques. The increased activity at low pH was due to the promoted release of the oxidation product, as well as increased oxygen vacancy concentration and enhanced electron transfer. This work has deepened our understanding of nanoceria as a catalyst, enhanced its catalytic activity, and provided a useful way of controlling its morphology.

show abstract

“…Numerous methods for synthesis of 3D porous CeO 2 with different morphologies have been developed, including spray pyrolysis, 4 precipitation methods, 5,6 combustion synthesis, 7 hydrothermal methods, [8][9][10] etc. However, among these methods, hazardous reagents and a series of energy consuming and tedious manipulations are usually needed.…”

Section: Introductionmentioning

confidence: 99%