Effects of pH and phosphate on CeO2 nanoparticle dissolution

Dahle, Jessica T.; Livi, Ken; Arai, Yuji

doi:10.1016/j.chemosphere.2014.02.027

Cited by 124 publications

(103 citation statements)

References 25 publications

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“…It was reported that the dissolution of nanoceria is pronounce at pH＜4.5. [86][87][88] At high ionic strength, the interaction between ions and nanoceria would change their surface charges and leads to their precipitation. With the dissolution or precipitation of nanoceria, their size and other parameters change, and the enzyme mimetic activities would be also altered.…”

Section: Parameters Influencing the Enzyme Mimetic Activities Of Nanomentioning

confidence: 99%

Ceria Nanoparticles as Enzyme Mimetics

Wang

Zhang

et al. 2017

Chin. J. Chem.

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In the past decades, enzyme mimetics based on ceria nanoparticles (nanoceria) have been developed as potential substitutes for nature enzymes. The mixed valence states of cerium and the patterns of oxygen vacancies on crystal planes result in different enzyme mimetic activities. In this review we survey the bio-applications of nanoceria-based enzyme mimetics as well as the underlying mechanisms. Factors influencing the enzyme mimetic activities and future perspective of nanoceria-based enzyme mimetics are also addressed.

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Section: Parameters Influencing the Enzyme Mimetic Activities Of Nanomentioning

confidence: 99%

Ceria Nanoparticles as Enzyme Mimetics

Wang

Zhang

et al. 2017

Chin. J. Chem.

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“…The aquatic environment and the size of CONPs are important. pH, and phosphate ligands might play important roles in controlling the solubility of CeO 2 38. pH is one of the few factors shown to drive whether CONPs act as oxidants or antioxidants 18,19.…”

Section: Radioprotection and Radiosensitizationmentioning

confidence: 99%

Cerium oxide nanoparticles in cancer

Gao¹,

Chen²,

Ma³

et al. 2014

OTT

153

106

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With the development of many nanomedicines designed for tumor therapy, the diverse abilities of cerium oxide nanoparticles (CONPs) have encouraged researchers to pursue CONPs as a therapeutic agent to treat cancer. Research data have shown CONPs to be toxic to cancer cells, to inhibit invasion, and to sensitize cancer cells to radiation therapy and chemotherapy. CONPs also display minimal toxicity to normal tissues and provide protection from various forms of reactive oxygen species generation. Differential cytotoxicity is important for anticancer drugs to distinguish effectively between tumor cells and normal cells. The antioxidant capabilities of CONPs, which enable cancer therapy protection, have also resulted in the exploration of these particles as a potential anticancer treatment. Taken together, CONPs might be a potential nanomedicine for cancer therapy and this review highlights the current research into CONPs as a novel therapeutic for the treatment of cancer.

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“…Besides that, the electrochemical approach has been attempted for 2-NP determination because of low-cost, simple operation, fast response, sensitive and economical. Nanomaterials had been used in catalytic cracking of naphtha in order to increase the yield of ethylene and propylene [9–10], oxidation of CO [11], antibacterial activity study [12], improvement of electro-catalytic activity and stability of PbO 2 electrode [13], hydrogen production [14], counter electrode for dye-sensitized solar cells [15], catalyst [16], CO conversion [17], degradation of phenol [18], photocatalytic activity [19], synthesis of spherical YAG [20], catalytic reduction of NO [21], removing of CO [22], catalytic wet-oxidation of 2,4-dichlorophenol solutions [23], enhancement of quantum yield [24], interrelated functionalities of hierarchically nanostructured layers [25], oxidation of methane [26], conversion of a dimensionally mixed ternary NCs [27], waste water treatments [28], and various applications [29–34]. Till to date, various nanostructure or composite materials based electrochemical chemical sensors have been established for the detection of hazardous phenolic compounds.…”

Section: Introductionmentioning

confidence: 99%

Efficient 2-Nitrophenol Chemical Sensor Development Based on Ce2O3 Nanoparticles Decorated CNT Nanocomposites for Environmental Safety

2016

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Ce2O3 nanoparticle decorated CNT nanocomposites (Ce2O3.CNT NCs) were prepared by a wet-chemical method in basic medium. The Ce2O3.CNT NCs were examined using FTIR, UV/Vis, Field-Emission Scanning Electron Microscopy (FESEM), X-ray electron dispersive spectroscopy (XEDS), X-ray photoelectron spectroscopy (XPS), and powder X-ray diffraction (XRD). A selective 2-nitrophenol (2-NP) sensor was developed by fabricating a thin-layer of NCs onto a flat glassy carbon electrode (GCE, surface area = 0.0316 cm2). Higher sensitivity including linear dynamic range (LDR), long-term stability, and enhanced electrochemical performances towards 2-NP were achieved by a reliable current-voltage (I-V) method. The calibration curve was found linear (R2 = 0.9030) over a wide range of 2-NP concentration (100 pM ~ 100.0 mM). Limit of detection (LOD) and sensor sensitivity were calculated based on noise to signal ratio (~3N/S) as 60 ± 0.02 pM and 1.6×10−3 μAμM-1cm-2 respectively. The Ce2O3.CNT NCs synthesized by a wet-chemical process is an excellent way of establishing nanomaterial decorated carbon materials for chemical sensor development in favor of detecting hazardous compounds in health-care and environmental fields at broad-scales. Finally, the efficiency of the proposed chemical sensors can be applied and utilized in effectively for the selective detection of toxic 2-NP component in environmental real samples with acceptable and reasonable results.

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Effects of pH and phosphate on CeO2 nanoparticle dissolution

Cited by 124 publications

References 25 publications

Ceria Nanoparticles as Enzyme Mimetics

Ceria Nanoparticles as Enzyme Mimetics

Cerium oxide nanoparticles in cancer

Efficient 2-Nitrophenol Chemical Sensor Development Based on Ce2O3 Nanoparticles Decorated CNT Nanocomposites for Environmental Safety

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