文献类型：期刊文献

英文题名：Designing of 3D MnO2-graphene catalyst on sponge for abatement temperature removal of formaldehyde

作者：Shi, Lei[1,2];Zhou, Xudong[1];Guo, Yujie[1];Li, Yunyu[1];Yan, Chenxu[2];Han, Qifeng[1];Zhang, Lingfan[1];Zhang, Wenqing[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Adv Mat, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Appl Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：441

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20223712708393);WOS:【SCI-EXPANDED(收录号:WOS:000863278500005)】；

基金：This work was supported by China National Key R & D Program (2020YFC1522501) and the National Natural Science of China (grant number 21407050) . The authors thanked the Research Centre of Anal- ysis and Test of East China University of Science and Technology for help on data and characterization. The authors appreciated the Prof. Huanxin Lai and Dr. Qilin Liu for the CFD modeling construction and simulation. The authors also thank the Ph.D. Y. H. Zhang from Agilent Technology Ltd. Co. and Prof. Y. Jin from Thermofisher Ltd. Co. for supplying HPLC technique support.

语种：英文

外文关键词：Manganese oxide; Formaldehyde; Catalytic oxidation; Indoor air

摘要：The Mn-based catalysts, with low cost and high activity, are believed to be the effective composites for eliminating in-door formaldehyde (HCHO), while the powdered form nanosized catalysts are hardly to apply for practical application. Herein, hetero-structure of nanosheets manganese oxide (MnO2) encapsulating N-doping graphene sphere (GS) were deposited in network-like sponge for constructing 3D catalyst. The prepared MnO2GS-Sponge composite catalyst exhibited excellent performance for removing HCHO at room temperature compared with GS and commercial MnO2. The MnO2-GS with larger specific surface area (209.1 m(2).g(-1)) was dispersed evenly in 3D network of sponge, which facilitated exposing more activate sites and achieving fast transport kinetics accelerating catalytic reaction for converting 97.1 % of 100 ppm of HCHO continuously to CO2 for 120 h. Moreover, rely on the chemisorption of amino groups on N-doping GS surface, HCHO could be enriched even at low concentrations and efficient elimination (from 1000 ppb to12 ppb, at 35. in 48 h). The average oxidation state and infrared spectra analysis suggested that abundant oxygen vacancies on MnO2-GSSponge could be identified as surface-active sites of converting HCHO into the intermediates of dioxymethylene and formate. This work might inspire the designing 3D composite material for potential application in other fields of environmental engineering or energy industrial.