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Research Paper | Chemistry | India | Volume 12 Issue 12, December 2023 | Rating: 4.8 / 10
Study of Semiconductor Photocatalyzed Oxidation of Influential Chemical Gluconic Acid
Abstract: The central point of this work is the metal catalyzed liquid phase photooxidation of gluconic acid in vary natural and normal conductions. Gluconic acid is a fine chemical which finds many industrial applications, mainly as water soluble cleansing agent, as food additive and beverages. Since it imparts a refreshing sour taste in many food items such as wine, fruit juices, etc. Similarly, sodium gluconate has a high sequestering power and it has a unique property of inhibiting bitterness in foodstuffs. Gluconic acid is also widely used in pharmaceutical industry particularly for the preparation of skin - care products, as an antioxidant, it is used precursor for the biosynthesis of ascorbic acid (Vitamin C), and medicinal chemistry for the synthesis of modified drugs. It is a highly valuable chemical and one of the organic building blocks of hyaluronic acid whose current worldwide market is estimated to be over $1 billion. Because of its potential application in environmental treatment and fine chemical synthesis photocatalysis has received enormous attention in recent few decades. Strong oxidation and reduction power of photo excited titanium oxide (TiO2) was realized with the discovery of Honda - Fujishima effect as in 1972, Fujishima et al. reported photo induced decomposition of water on TiO2 electrodes. In wasted water, under aqueous conditions, organic contaminants can be degraded into CO2 and H2O, whereas under dry organic solvent or controlled pH, irradiation time, by using visible or UV light etc.; the organic compounds may also be selectively oxidized into fine chemical products rather than complete mineralization. TiO2 P25 (70% anatase, 30% rutile) is the most employed photocatalytic semiconductor because of its chemical inertness, photostability, low cost, and non - toxicity. It is utilized as a desiccant, brightener, or reactive mediator in commercial products such as foods, paints, pharmaceuticals, drugs, and solar cells. Most of metal oxide which are being used as semiconductors in this study like titanium oxide, zinc oxides etc. are used as the base for these materials. As a food additive, TiO2 is approved for use in the EU, USA, Australia and New Zealand; it is listed by its INS number 270 or as E number E - 270. The US Food and Drug Administration permits up to 1% TiO2 as an inactive ingredient in food products. In this study it is believed that the gluconic acid may come in contact with titanium oxide or other metal oxide in the presence of sunlight and photooxidation may occur where the photo products can impact the human health.
Keywords: Gluconic acid, Semiconductor, Photooxidation, Titanium Oxide
Edition: Volume 12 Issue 12, December 2023,
Pages: 2093 - 2099