抗坏血酸
过氧化氢
催化作用
化学
罗丹明B
铜
核化学
脱氢抗坏血酸
无机化学
动力学
激进的
有机化学
光催化
食品科学
量子力学
物理
作者
Bing Xiao,Min Wu,Yun Wang,Rufen Chen,Hui Liu
标识
DOI:10.1002/slct.202001156
摘要
Abstract CuO nanosheet was successfully prepared via a simple, green hydrothermal method. The resulted product was characterized by various technologies. CuO combined with trace ascorbic acid exhibited excellent Fenton‐like catalytic activity for Rhodamine B degradation. 80 % of RhB degradation occurred in the first 10 min and ascorbic acid was transformed to dehydroascorbic acid at this stage. When the RhB degradation reaction ended, the mineralization of ascorbic acid commenced and finally the ascorbic acid was mineralized to CO 2 and H 2 O. The role of ascorbic acid was to accelerate the two cycles (≡Cu II →≡Cu III →≡Cu II and ≡Cu I →≡Cu II →≡Cu I ) on the surface of CuO particles, which results in the continuous generation of abundant free radicals and rapid degradation of pollutants. The rapid degradation kinetics can be described by Behnajady‐Modirshahla‐Ghanbery equation. The rate constant of HO • generation was 3.7 × 10 −2 s −1 and the most utilization efficiency of H 2 O 2 reached 75 %. The CuO/ascorbic acid catalyst has environmentally friendly features, thereby highlighting its practical utility for wastewater treatment.
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