过氧二硫酸盐
纳米反应器
降级(电信)
非阻塞I/O
催化作用
分解
化学工程
电子转移
化学
材料科学
光化学
有机化学
计算机科学
电信
工程类
作者
Gen Wang,Ke Wang,Zhuoyue Liu,Youyou Feng,Shengjiong Yang,Yaqiong Su,Xufang Qian,Pengkang Jin,Jing Wei
标识
DOI:10.1016/j.apcatb.2023.122359
摘要
Nonradical activation of peroxydisulfate (PDS) is promising for wastewater decontamination but suffers from insufficient decomposition efficiency toward organics. Herein, NiO nanospheres with hollow multi-shelled structure (HoMS) and tunable shell numbers are designed as a nanoreactor of PDS activation to enhance the decomposition efficiency. Study on bis-phenol A (BPA) degradation reveals that 3-shelled NiO HoMS exhibits enhanced kinetic rate (0.08 min1) and mineralization degree (79.2%) compared to 2-shelled NiO HoMS (0.04 min−1, 50%) and NiO nanoparticles (0.01 min−1, 29.8%). The degradation of BPA over NiO HoMS follows electron transfer regime with oxygen vacancy (VO) acted as the active site. The hollow multi-shelled structure not only increases the accessibility of VO but also enriches local concentration of reactants in the void spaces due to the nanoconfinement effect, and thus mainly contributes to the enhanced catalytic efficiency. This work provides a distinct case for developing efficient nonradical oxidation technique for water purification.
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