胭脂树橙酸的光产物是由甜叶菊废渣复合而成的。

Photoproducts of carminic acid formed by a composite from Manihot dulcis waste.

机构信息

Centro de Química, Instituto de Ciencias, Universidad Autónoma de Puebla, Ciudad Universitaria, Edif. 103H, Puebla, Pue. 72570, Mexico; Instituto de Agroingeniería, Universidad del Papaloapan, Campus Loma Bonita, Oaxaca, Mexico.

Facultad de Ciencias Químicas, Universidad Autónoma de Puebla, Ciudad Universitaria, Edif. 105, Puebla, Pue. 72570, Mexico.

出版信息

Food Chem. 2015 Apr 15;173:725-32. doi: 10.1016/j.foodchem.2014.10.085. Epub 2014 Oct 22.

DOI:10.1016/j.foodchem.2014.10.085

PMID:25466082

Abstract

Carbon-TiO2 composites were obtained from carbonised Manihot dulcis waste and TiO2 using glycerol as an additive and thermally treating the composites at 800 °C. Furthermore, carbon was obtained from manihot to study the adsorption, desorption and photocatalysis of carminic acid on these materials. Carminic acid, a natural dye extracted from cochineal insects, is a pollutant produced by the food industry and handicrafts. Its photocatalysis was observed under different atmospheres, and kinetic curves were measured by both UV-Vis and HPLC for comparison, yielding interesting differences. The composite was capable of decomposing approximately 50% of the carminic acid under various conditions. The reaction was monitored by UV-Vis spectroscopy and LC-ESI-(Qq)-TOF-MS-DAD, enabling the identification of some intermediate species. The deleterious compound anthracene-9,10-dione was detected both in N2 and air atmospheres.

摘要

利用甘油作为添加剂，将碳化的木薯废料和 TiO2 转化为碳-TiO2 复合材料，并在 800°C 下对其进行热处理。此外，还从木薯中提取碳，研究了茜素酸在这些材料上的吸附、解吸和光催化作用。茜素酸是一种从胭脂虫中提取的天然染料，是食品工业和手工艺品产生的污染物。在不同气氛下观察了其光催化作用，并通过 UV-Vis 和 HPLC 测量了动力学曲线进行比较，得出了有趣的差异。在各种条件下，该复合材料能够分解约 50%的茜素酸。通过 UV-Vis 光谱和 LC-ESI-(Qq)-TOF-MS-DAD 监测反应，能够鉴定出一些中间产物。在 N2 和空气气氛中均检测到有害化合物蒽-9,10-二酮。