Concentration and pH-control on phosphoric acid treatment of zinc oxide for novel white pigment
Concentration and pH-control on phosphoric acid treatment of zinc oxide for novel white pigment
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DOI：
10.1080/14328917.2018.1554791
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发表时间：
2018-12
影响因子：
--
通讯作者：
H. Onoda;Daiki Higashide
中科院分区：
文献类型：
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作者：
H. Onoda;Daiki Higashide
摘要氧化锌具有光催化活性，可用作化妆品的白色颜料。皮肤上一定程度的皮脂被阳光中的紫外线辐射分解。在本工作中，氧化锌与0.1、0.2和0.5 mol/L磷酸在50ºC下振荡3小时，以合成化妆品用白色颜料。氧化锌也与0.1mol/L磷酸一起设置在pH 4、5、6和7下，然后振荡。研究了所得粉体的化学组成、粉体性质、光催化活性、色相和光滑度。制备过程中pH值对氧化锌与磷酸的反应有影响。磷酸处理抑制了氧化锌的光催化活性。所得样品在可见光区具有足够高的反射率。
ABSTRACT Zinc oxide that has the photocatalytic activity is used as white pigment for cosmetics. A certain degree of sebum on the skin is decomposed by the ultraviolet radiation in sunlight. In this work, zinc oxide was shaken with 0.1, 0.2, and 0.5 mol/L of phosphoric acid at 50ºC for 3 hours to synthesize a white pigment for cosmetics. Zinc oxide was also set with 0.1 mol/L of phosphoric acid at pH 4, 5, 6, and 7, and then shaking. The chemical composition, powder properties, photocatalytic activity, color phase, and smoothness of the obtained powder were studied. The pH value in preparation had influence on the reaction between zinc oxide and phosphoric acid. The photocatalytic activity of zinc oxide was inhibited by phosphoric acid treatment. The obtained samples had enough high reflectance at the visible light region.