纳米氧化亚铜光催化降解4-氯酚

Photocatalytic degradation of 4-chlorophenol using nano cuprous oxide

用CuCl水解法、水合肼还原法、盐酸羟胺还原法制备了不同形貌、不同粒径的纳米氧化亚铜,以4-氯酚作为有机污染物的模型分子,研究其在合成的纳米氧化亚铜上的光催化降解。考察了光源、催化剂用量、初始pH值、曝气、添加过氧化氢等因素对4-氯苯酚降解效率的影响。结果表明,在模拟太阳光照射下,立方八面体纳米Cu2O用量0.1 g·L^(-1),加入1mL 0.02 mol·L^(-1)双氧水,200mL 0.1 mmol·L^(-1)的4-氯苯酚溶液(pH=4.98),降解2 h后降解率可达到98.71%以上。

Nano cuprous oxide of regular octahedra, truncated cubes and cuboctahedra,were prepared by hydrol-ysis method using CuCl, hydrazine hydrate reduction, and hydroxylamine hydrochloride. Nano cuprous oxide was used for the photocatalytic degradation of 4 - chlorophenol. Several factors were investigated on the degradation efficiency of 4 - chlorophenol, such as the nano -morphology, dosage of cuprous oxide, initial concentration of chlorophenol, pH value, oxygen, and the hydrogen peroxide. The results show that the cuboctahedra cuprous oxide nanoparticles degraded 4 -chlorophenol effectively under irradiation of simulated sunlight. The degradation rate was 98.71% in 2 hours in the concentration of 0.1 mmol· L-1 4-chlorophenol solution （ p H =4.98）, when the cuboctahedra Cu2O amount was 0.1 g·L-1 with 1 mL hydrogen peroxide （0.02 mol·L-1）.