Keywords Heterogeneous nanocatalysts Ag/ZnO/graphene Nanocomposite Catalytic oxidation Photodegradation Carboxylic acids and Vitamin B Introduction Production of nictonic acid, also known as vitamin B , with green procedures has received great attention due to its pharmaceutical use as a vitamin. Every year, an almost 20,000 tons of vitamin B are produced worldwide. Currently, the commonly used oxidizing agent in production of vitamin B is chromic acid, which is characterized as corrosive. In addition, several tons of inorganic waste are produced for every ton of nicotinic acid generated from 3-picoline. Therefore, developing an efﬁcient catalytic system was mandatory to minimize the inorganic wastes and obtain vitamin B in high yield . Production of vitaimin B from 3 3 catalytic oxidation of 3-pyridinemethanol , 3-pyridinecarboxyaldehyde or picoline  has been reported in several cases, due to its biological importance . These methods have some drawbacks such as selectivity in production of nicotinic acid, long lasting reaction time, the use of high temperature, and the use of expensive materials as catalysts. Nanostructured catalysts are becoming a more popular strategy to provide heterogeneous catalysts with improved characteristics [6–12]. Currently, the use of recyclable nanocatalyst in oxidation reactions has attracted great
Research on Chemical Intermediates – Springer Journals
Published: Jun 22, 2016
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