Graphene enhancedα-MnO_(2) for photothermal catalytic decomposition of carcinogen formaldehyde  

作　　者：Xiaoshan Zeng Chuanjia Shan Mingdi Sun Danni Ding Shaopeng Rong 

机构地区：[1]Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse,School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Chinese Chemical Letters》2022年第11期4771-4775,共5页中国化学快报（英文版）

基　　金：financially supported by National Natural Science Foundation of China(No.21906084);the National Undergraduate Training Program for Innovation and Entrepreneurship(No.202010288026Z)。

摘　　要：Formaldehyde(HCHO)causes increasing concerns due to its ubiquitously found in indoor air and being irritative and carcinogenic to humans.Photothermal-catalysis developed in recent years has been considered as a significant strategy for enhancing catalytic activity.Manganese oxides,compared with its strong thermocatalytic activity,generally suffer from much lower photocatalytic activity make its photochemical properties less concerned.Herein,α-MnO_(2)nanowires were composited with the graphene oxide(GO)via mechanical grinding and co-precipitating method,respectively.α-MnO_(2)/GO nanohybrids prepared by co-precipitating method exhibits excellent activity,achieving 100%decomposition of HCHO with the solar-light irradiation at ambient temperature.It is found that,besides the photo-driven thermocatalysis,the photocatalysis mechanism made a major contribution to the decomposition of HCHO.The incorporation of GO,on the one hand,is beneficial to improve the optical absorption capacity and photothermal conversion efficiency;on the other hand,is conductive to electron transfer and effective separation of electrons and holes.These synergistic effects significantly improve the catalytic activity ofα-MnO_(2)/GO nanohybrids.This work proposes a new approach for the utilization of solar energy by combining manganese oxides,and also develops an efficient photothermal-catalyst to control HCHO pollution in indoor air.

关 键 词：α-MnO_(2) Photothermal catalytic Graphene oxide FORMALDEHYDE 

分 类 号：X51[环境科学与工程—环境工程] TU834.8[建筑科学—供热、供燃气、通风及空调工程] O643.36[理学—物理化学] O644.1[理学—化学]