Construction of continuous flow catalytic reactor-HPLC system with ultrahigh catalytic activity using 2D nanoflower MOF-derived Cu2O/Cu/ PDA/CF catalyst

被引：8

作者：

Li, Yan ^{[1
]}

Zheng, Shuang ^{[1
]}

Hou, Shenghuai ^{[1
]}

Chen, Tiantian ^{[1
]}

Bai, Yuxuan ^{[1
]}

Zhang, Manlin ^{[1
]}

Zhou, Dandan ^{[1
]}

Yang, Shu ^{[1
]}

Xu, Hui ^{[1
]}

Zhang, Ganbing ^{[2
]}

机构：

[1] Cent China Normal Univ, Coll Chem, Key Lab Pesticide & Chem Biol, Minist Educ, Wuhan 430079, Peoples R China

[2] Hubei Univ, Coll Chem & Chem Engn, Wuhan 430062, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2023年 / 460卷

基金：

中国国家自然科学基金;

关键词：

Cu2O/Cu; Metal-organic frameworks (MOFs) derived catalyst; Continuous flow catalytic reactor; Online degradation-detection; 4-nitrophenol; REDUCTION; CARBON; EFFICIENT; 4-NITROPHENOL; DEGRADATION; COMPOSITE; OXIDATION;

D O I：

10.1016/j.jhazmat.2023.132376

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Currently, metal-organic frameworks (MOFs) derived materials have been widely concerned for the reduction of 4-nitrophenol (4-NP). However, complex recovery of powder catalysts and low utilization ratio of active sites make their application challenging. Herein, a novel Cu2O/Cu/PDA/CF catalyst has been developed for the rapid reduction of 4-NP to 4-aminophenol (4-AP). The catalyst was constructed by compositing a two-dimensional nanoflower MOF-derived nanoporous Cu2O/Cu network on a polydopamine (PDA)-modified porous copper foam by a mild and controllable in-situ reduction synthesis. Notably, an enhanced catalytic performance of Cu2O/Cu/PDA/CF was obtained for 4-NP reduction with a rate constant (k) of 0.8001 min(-1), outperforming Cu/PDA/CF-X (X = 400, 500 and 600 degree celsius pyrolysis temperature) catalysts (2.3-6.4 folds), and even many reported catalysts (2.3-46.5 folds). The ultrafast degradation of 4-NP was completed in 70 s. Moreover, an ingenious online continuous flow catalytic reactor (CFCR)-high performance liquid chromatography (HPLC) system was constructed for automatic and real-time monitoring of the reduction reaction. System stability experiments over 300 min revealed a surprisingly high reaction k value of 76.68 min(-1) at low NaBH4 usage, significant increasing by 2-3 orders of magnitude compared with Cu2O/Cu/PDA/CF batch catalysis, due to the high aspect ratio of 2D nanoflower MOF and convection-accelerated mass transfer. This work offers new insights for the rational design of catalytic reactor and its potential application in wastewater treatment.

引用

页数：11