Preparation of Zinc Oxide by Hydrothermal Precipitation Method and their Photocatalytic Characterization

Jeong, Sang-Gu; Na, Seok-Eun; Kim, Siyoung; Ju, Chang-Sik

doi:10.9713/kcer.2012.50.5.808

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…After 15 minutes' illumination, centrifugal separate it with 4000r/min for 1 hour, take the upper liquor and place it under UV, then use a visible spectrophotometer measure the absorbance and keep data from 460nm distance. Methyl orange solution of different concentrations have different absorbance, and the one with 0~45mg/L has a commendable linear relation to concentration [6] , and the solution has its highest absorbing peak at 460nm position. The degradation rate of ZnO to methyl orange could be calculated from the formula below: D=(A 1 -A t )/A 1…”

Section: Table 1 a Table Of Particle Diameter Of Samplesmentioning

confidence: 99%

Preparation of Doped ZnOs via Microwave and the Study of its Performance

Xie

et al. 2013

AMM

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This dissertation aims at the preparation of the Nanometer zinc oxide doping with different elements via the method of microwave. After characterizing those pellets of prepared Nanometer zinc oxide through XRD and SEM, it illustrates that the structure of Nanometer zinc oxide is still 6 wurtzite with high purity and the size of its pellet is at an averages of 21.83nm.But different mixed elements will differentiate the pellets' diameter. Moreover, through defined the Methyl orange as the stimulating pollutant, and conducted the Catalytic performance test of the samples. And the result shows that the effect was the best when doped with only Titanium, followed by doped with both Titanium and Magnesium, and the worst was doped with only Magnesium. Keywords: Microwave heating, ZnO, Dope, Degradation rate

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Section: Table 1 a Table Of Particle Diameter Of Samplesmentioning

confidence: 99%

Preparation of Doped ZnOs via Microwave and the Study of its Performance

Xie

et al. 2013

AMM

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Synthesis of Planar-Type ZnO Powder in Non-Nano Scale Dimension and Its Application in Ultraviolet Protection Cosmetics

Lee

Park

et al. 2023

Materials

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ZnO is one of the most widely used inorganic sunscreens, owing to its fine particle size and UV light shielding capability. However, powders at nanosizes can be toxic and cause adverse effects. The development of non-nanosized particles has been slow. The present work investigated synthesis methods of non-nanosized ZnO particles for ultraviolet protection application. By altering the starting material, KOH concentration, and input speed, the ZnO particles can be obtained in different forms, including needle type, planar type, and vertical wall type. Cosmetic samples were made by mixing different ratios of synthesized powders. The physical properties and the UV blockage efficacy of different samples were evaluated using scanning electron microscopy (SEM), X-ray diffraction (XRD), particle size analyzer (PSA), and ultraviolet/visible (UV/Vis) spectrometer. The samples with 1:1 ratio of needle-type ZnO and vertical wall-type ZnO exhibited superior light blocking effect owing to improved dispersibility and prevention of particle agglomeration. The 1:1 mixed sample also complied with the European nanomaterials regulation due to the absence of nanosized particles. With superior UV protection in the UVA and UVB regions, the 1:1 mixed powder showed potential to be used as a main ingredient in UV protection cosmetics.

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Preparation of Photocatalysts by Hydrothermal Precipitation Method and Their Photocatalytic Performance of Brilliant Blue FCF

Kim¹,

Jeong²,

Na³

et al. 2016

Korean Chemical Engineering Research

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Experimental research on the preparation of photocatalyst for the decomposition of brilliant blue FCF (C 37 H 31 O 9 N 2 S 3 Na 2 ) was performed. TiO 2 and ZnO powders were prepared from titanium (IV) sulfate and zinc acetate at low reaction temperature and atmospheric pressure by hydrothermal precipitation method without calcination. In addition, TiO 2 was prepared with cationic surfactant CTAB (Hexadecyltrimethyl ammonium bromide) at the same conditions. The physical properties of prepared TiO 2 and ZnO, such as crystallinity, average particle size and absorbance, were investigated by XRD, Zeta-potential meter and DRS. And, the photocatalytic degradation of brilliant blue FCF has been studied in the batch reactor under UV radiation. For the photocatalysts prepared without CTAB, TiO 2 has smaller particle size and larger absorbance and photocatalytic reaction rate than ZnO. And TiO 2 , prepared with CTAB whose concentration is 1/10 of that of precursor, shows 15% higher than that prepared without CTAB in final photocatalytic degradation ratio of brilliant blue FCF.

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Preparation of Zinc Oxide by Hydrothermal Precipitation Method and their Photocatalytic Characterization

Cited by 3 publications

References 16 publications

Preparation of Doped ZnOs via Microwave and the Study of its Performance

Preparation of Doped ZnOs via Microwave and the Study of its Performance

Synthesis of Planar-Type ZnO Powder in Non-Nano Scale Dimension and Its Application in Ultraviolet Protection Cosmetics

Preparation of Photocatalysts by Hydrothermal Precipitation Method and Their Photocatalytic Performance of Brilliant Blue FCF

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