光催化氧气还原制备H2O2

H2O2广泛应用于化工和环保领域,其分解的唯一产物是水,有利于生产与自然生态系统的协调可持续发展.工业上H2O2的合成主要是通过蒽醌法间接合成,该方法能耗大,污染环境.而直接由H2与O2混合制备H2O2,具有极大的安全风险,且需要消耗大量H2.通过光催化技术将O2和H2O转化成H2O2的方法,避免了H2与O2的直接混合...

Preparation of H2O2 By Photocatalytic Reduction of Oxygen

H₂O₂ is widely used in the fields of chemical industry and environmental protection. The only product of its decomposition is water, which is environmentally friendly and conducive to the coordinated and sustainable development of production. The industrial synthesis of H₂O₂ is mainly indirectly through the anthraquinone method, which consumes a lot of energy and pollutes the environment. The preparation of H₂O₂ directly from the mixture of H2 and O₂ has great safety risks and requires a large amount of H2. The method of converting O₂ and H2O into H₂O₂ through photocatalytic technology avoids the direct mixing of H2 and O₂, and uses endless solar energy as an energy source, which has attracted much attention in recent years. This article summarizes the research progress of photocatalytic reduction of O₂ to H₂O₂, compares and analyzes the reaction performance and control measures of different catalytic systems, such as g-C₃N₄, TiO₂, and other photocatalysts, and the mechanisms of photocatalytic preparation of H₂O₂. In the end, the development of this field is prospected.