食品科学

• 基础研究 • 上一篇    下一篇

介孔TiO2对饮料中4 种色素在太阳光下的光催化降解

王剑飞,李梦迪,李 燕,刘胤璇,贾 英   

  1. 红河州质量技术监督综合检测中心,云南 蒙自 661100
  • 发布日期:2014-12-15

Effect of Mesoporous Titanium Dioxide on Photocatalytic Degradation of Four Pigments in Beverage under Natural Sunlight

WANG Jian-fei, LI Meng-di, LI Yan, LIU Yin-xuan, JIA Ying   

  1. Honghe Comprehensive Inspection Center of Quality and Technical Supervision, Mengzi 661100, China
  • Published:2014-12-15

摘要:

以日落黄为模板,四异丙醇钛为原料合成介孔二氧化钛(MTiO2/SY),在太阳光下对含有日落黄、柠檬黄、苋菜红、胭脂红等4 种色素的饮料进行光催化实验,通过进行X射线衍射(X-ray diffraction technique,XRD)、N2等温吸附-解吸和紫外-可见漫反射光谱表征。结果表明,MTiO2/SY具有介孔孔道结构,较大的比表面积和可见光区吸收,在太阳光下对饮料中日落黄、柠檬黄、苋菜红、胭脂红有较强的光催化降解活性,太阳光下光催化活性明显高于P25。光催化降解后的饮料可以进行自然排放,但不宜食用。

关键词: 日落黄, 柠檬黄, 苋菜红, 胭脂红, 介孔二氧化钛, 光催化降解

Abstract:

TiO2 mesoprous material (MTiO2/SY) was prepared by using titaniam isopropoxide as the raw material and sunset
yellow as the template. The photocatalytic degradation of sunset yellow, lemon yellow, amaranth, carmine in beverage
exposed to solar light was explored. The synthesized mesoporous titania samples were characterized by a combination of
various physicochemical techniques, such as X-ray diffraction (XRD), isothermal nitrogen adsorption/desorption, and UVvisible
diffuse reflectance spectroscopy. The results showed the MTiO2/SY had mesoporous arrangements, large specific
surface area, and absorption in the visible region. Based on the evaluation of photocatalytic activity, MTiO2/SY presented
significantly higher photocatalytic efficiency in solar light than P25. Therefore, drinks are unavailable for drinking after
photocatalytic degradation and should be naturally discharged.

Key words: sunset yellow, lemon yellow, amaranth, carmine, mesoprous TiO2, photocatalytic degradation

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